From 2524257330e93d27605f42f25e33cde1187590fa Mon Sep 17 00:00:00 2001
From: bardram <jakba@dtu.dk>
Date: Wed, 29 May 2024 13:53:41 +0200
Subject: [PATCH 1/4] fix of #369

---
 .../lib/carp_services/carp_base_service.dart  |  4 +-
 .../lib/carp_services/carp_service.dart       | 15 ++---
 .../lib/carp_services/carp_tasks.dart         |  6 +-
 .../lib/carp_services/file_reference.dart     |  6 +-
 .../lib/carp_services/http_retry.dart         | 62 +++++++++++++------
 5 files changed, 59 insertions(+), 34 deletions(-)

diff --git a/backends/carp_webservices/lib/carp_services/carp_base_service.dart b/backends/carp_webservices/lib/carp_services/carp_base_service.dart
index 9b27d320..7c15599a 100644
--- a/backends/carp_webservices/lib/carp_services/carp_base_service.dart
+++ b/backends/carp_webservices/lib/carp_services/carp_base_service.dart
@@ -95,8 +95,8 @@ abstract class CarpBaseService {
     // debug(
     //     'RESPONSE: $httpStatusCode\n${toJsonString(json.decode(responseBody))}');
 
-    // check if this is a json list or an empty string
-    // if so turn it into a valid json map
+    // Check if this is a json list or an empty string
+    // If so turn it into a valid json map
     if (responseBody.startsWith('[')) responseBody = '{"items":$responseBody}';
     if (responseBody.isEmpty) responseBody = '{}';
 
diff --git a/backends/carp_webservices/lib/carp_services/carp_service.dart b/backends/carp_webservices/lib/carp_services/carp_service.dart
index b76bdf10..7eacfd3a 100644
--- a/backends/carp_webservices/lib/carp_services/carp_service.dart
+++ b/backends/carp_webservices/lib/carp_services/carp_service.dart
@@ -7,10 +7,10 @@
 
 part of 'carp_services.dart';
 
-/// Provide access to a CARP web service endpoint.
+/// Provide access to a CARP Web Services (CAWS) endpoints.
 ///
 /// The (current) assumption is that each Flutter app (using this library) will
-/// only connect to one CARP web service backend.
+/// only connect to one CARP web services backend.
 /// Therefore a [CarpService] is a singleton and can be used like:
 ///
 /// ```dart
@@ -65,10 +65,11 @@ class CarpService extends CarpBaseService {
   Future<ConsentDocument> createConsentDocument(
       Map<String, dynamic> document) async {
     // POST the document to the CARP web service
-    http.Response response = await http.post(
-        Uri.parse(Uri.encodeFull(consentDocumentEndpointUri)),
-        headers: headers,
-        body: json.encode(document));
+    http.Response response = await httpr.post(
+      consentDocumentEndpointUri,
+      headers: headers,
+      body: json.encode(document),
+    );
 
     int httpStatusCode = response.statusCode;
     Map<String, dynamic> responseJson =
@@ -161,7 +162,7 @@ class CarpService extends CarpBaseService {
     int httpStatusCode = response.statusCode;
 
     switch (httpStatusCode) {
-      case 200:
+      case HttpStatus.ok:
         {
           List<dynamic> list = json.decode(response.body) as List<dynamic>;
           List<CarpFileResponse> fileList = [];
diff --git a/backends/carp_webservices/lib/carp_services/carp_tasks.dart b/backends/carp_webservices/lib/carp_services/carp_tasks.dart
index 19fc8cbc..c5d07a59 100644
--- a/backends/carp_webservices/lib/carp_services/carp_tasks.dart
+++ b/backends/carp_webservices/lib/carp_services/carp_tasks.dart
@@ -88,8 +88,8 @@ class FileUploadTask extends CarpServiceTask {
 
         switch (httpStatusCode) {
           // CARP web service returns "201 Created" when a file is created on the server.
-          case 200:
-          case 201:
+          case HttpStatus.ok:
+          case HttpStatus.created:
             {
               // save the id generated from the server
               reference.id = map["id"] as int;
@@ -152,7 +152,7 @@ class FileDownloadTask extends CarpServiceTask {
       final int httpStatusCode = response.statusCode;
 
       switch (httpStatusCode) {
-        case 200:
+        case HttpStatus.ok:
           {
             _state = TaskStateType.success;
             file.writeAsBytes(response.bodyBytes);
diff --git a/backends/carp_webservices/lib/carp_services/file_reference.dart b/backends/carp_webservices/lib/carp_services/file_reference.dart
index d302a079..99a8dce5 100644
--- a/backends/carp_webservices/lib/carp_services/file_reference.dart
+++ b/backends/carp_webservices/lib/carp_services/file_reference.dart
@@ -58,7 +58,7 @@ class FileStorageReference extends CarpReference {
     print(response.body);
 
     switch (httpStatusCode) {
-      case 200:
+      case HttpStatus.ok:
         {
           return CarpFileResponse._(map);
         }
@@ -84,8 +84,8 @@ class FileStorageReference extends CarpReference {
     int httpStatusCode = response.statusCode;
 
     switch (httpStatusCode) {
-      case 200:
-      case 204:
+      case HttpStatus.ok:
+      case HttpStatus.noContent:
         {
           return httpStatusCode;
         }
diff --git a/backends/carp_webservices/lib/carp_services/http_retry.dart b/backends/carp_webservices/lib/carp_services/http_retry.dart
index 5c5fa78a..a167b584 100644
--- a/backends/carp_webservices/lib/carp_services/http_retry.dart
+++ b/backends/carp_webservices/lib/carp_services/http_retry.dart
@@ -101,19 +101,21 @@ class HTTPRetry {
   }
 
   /// Sends an HTTP GET request with the given [headers] to the given [url].
-  Future<http.Response> get(String url, {Map<String, String>? headers}) async =>
-      await retry(
-        () => client
-            .get(
-              Uri.parse(Uri.encodeFull(url)),
-              headers: headers,
-            )
-            .timeout(const Duration(seconds: 20)),
-        delayFactor: const Duration(seconds: 5),
-        maxAttempts: 15,
-        retryIf: (e) => e is SocketException || e is TimeoutException,
-        onRetry: (e) => print('${e.runtimeType} - Retrying to GET $url'),
-      );
+  Future<http.Response> get(String url, {Map<String, String>? headers}) async {
+    final response = await retry(
+      () => client
+          .get(
+            Uri.parse(Uri.encodeFull(url)),
+            headers: headers,
+          )
+          .timeout(const Duration(seconds: 20)),
+      delayFactor: const Duration(seconds: 5),
+      maxAttempts: 15,
+      retryIf: (e) => e is SocketException || e is TimeoutException,
+      onRetry: (e) => print('${e.runtimeType} - Retrying to GET $url'),
+    );
+    return clean(response);
+  }
 
   /// Sends an HTTP POST request with the given [headers] and [body] to the given [url].
   Future<http.Response> post(
@@ -123,7 +125,7 @@ class HTTPRetry {
     Encoding? encoding,
   }) async {
     // calling the http POST method using the retry approach
-    final http.Response response = await retry(
+    final response = await retry(
       () => client
           .post(
             Uri.parse(Uri.encodeFull(url)),
@@ -137,7 +139,8 @@ class HTTPRetry {
       retryIf: (e) => e is SocketException || e is TimeoutException,
       onRetry: (e) => print('${e.runtimeType} - Retrying to POST $url'),
     );
-    return response;
+
+    return clean(response);
   }
 
   /// Sends an HTTP PUT request with the given [headers] and [body] to the given [url].
@@ -148,7 +151,7 @@ class HTTPRetry {
     Encoding? encoding,
   }) async {
     // calling the http PUT method using the retry approach
-    final http.Response response = await retry(
+    final response = await retry(
       () => client
           .put(
             Uri.parse(Uri.encodeFull(url)),
@@ -162,7 +165,7 @@ class HTTPRetry {
       retryIf: (e) => e is SocketException || e is TimeoutException,
       onRetry: (e) => print('${e.runtimeType} - Retrying to PUT $url'),
     );
-    return response;
+    return clean(response);
   }
 
   /// Sends an HTTP DELETE request with the given [headers] to the given [url].
@@ -171,7 +174,7 @@ class HTTPRetry {
     Map<String, String>? headers,
   }) async {
     // calling the http DELETE method using the retry approach
-    final http.Response response = await retry(
+    final response = await retry(
       () => client
           .delete(
             Uri.parse(Uri.encodeFull(url)),
@@ -183,6 +186,27 @@ class HTTPRetry {
       retryIf: (e) => e is SocketException || e is TimeoutException,
       onRetry: (e) => print('${e.runtimeType} - Retrying to DELETE $url'),
     );
-    return response;
+    return clean(response);
   }
+
+  /// Check if we get an Nginx reverse proxy error in HTML format, and if so
+  /// convert it to a JSON error message.
+  ///
+  /// See issue : https://github.com/cph-cachet/carp.sensing-flutter/issues/369
+  http.Response clean(http.Response response) =>
+      response.body.startsWith('<html>')
+          ? http.Response(
+              '{'
+              '"statusCode": 502,'
+              '"message": "502 Bad Gateway.",'
+              '"path": "POST ${response.request?.url}"'
+              '}',
+              response.statusCode,
+              headers: response.headers,
+              isRedirect: response.isRedirect,
+              persistentConnection: response.persistentConnection,
+              reasonPhrase: response.reasonPhrase,
+              request: response.request,
+            )
+          : response;
 }

From 1d3e4f4050a209e0fa3abdb5622bab9b1114a994 Mon Sep 17 00:00:00 2001
From: bardram <jakba@dtu.dk>
Date: Thu, 30 May 2024 08:36:19 +0200
Subject: [PATCH 2/4] fix of #392

---
 .../lib/carp_auth/carp_auth_service.dart      |  1 +
 .../lib/carp_services/http_retry.dart         | 39 +++++++++++++++++++
 .../test/carp_properties.dart                 |  4 +-
 .../test/credentials_template.dart            |  2 +
 4 files changed, 44 insertions(+), 2 deletions(-)

diff --git a/backends/carp_webservices/lib/carp_auth/carp_auth_service.dart b/backends/carp_webservices/lib/carp_auth/carp_auth_service.dart
index 6893186f..352178bd 100644
--- a/backends/carp_webservices/lib/carp_auth/carp_auth_service.dart
+++ b/backends/carp_webservices/lib/carp_auth/carp_auth_service.dart
@@ -8,6 +8,7 @@ class CarpAuthService extends CarpAuthBaseService {
   /// Before this instance can be used, it must be configured using the
   /// [configure] method.
   factory CarpAuthService() => _instance;
+
   CarpAuthService.instance() : this._();
 
   /// Is a user authenticated?
diff --git a/backends/carp_webservices/lib/carp_services/http_retry.dart b/backends/carp_webservices/lib/carp_services/http_retry.dart
index a167b584..c79fe745 100644
--- a/backends/carp_webservices/lib/carp_services/http_retry.dart
+++ b/backends/carp_webservices/lib/carp_services/http_retry.dart
@@ -114,6 +114,16 @@ class HTTPRetry {
       retryIf: (e) => e is SocketException || e is TimeoutException,
       onRetry: (e) => print('${e.runtimeType} - Retrying to GET $url'),
     );
+
+    // Check if we are accessing a newly created resource and refresh token once
+    // if we get a 403 forbidden response.
+    //
+    // See issue : https://github.com/cph-cachet/carp.sensing-flutter/issues/392
+    if (response.statusCode == HttpStatus.forbidden) {
+      await CarpAuthService().refresh();
+      return get(url, headers: headers);
+    }
+
     return clean(response);
   }
 
@@ -140,6 +150,15 @@ class HTTPRetry {
       onRetry: (e) => print('${e.runtimeType} - Retrying to POST $url'),
     );
 
+    // Check if we are accessing a newly created resource and refresh token once
+    // if we get a 403 forbidden response.
+    //
+    // See issue : https://github.com/cph-cachet/carp.sensing-flutter/issues/392
+    if (response.statusCode == HttpStatus.forbidden) {
+      await CarpAuthService().refresh();
+      return post(url, headers: headers, body: body, encoding: encoding);
+    }
+
     return clean(response);
   }
 
@@ -165,6 +184,16 @@ class HTTPRetry {
       retryIf: (e) => e is SocketException || e is TimeoutException,
       onRetry: (e) => print('${e.runtimeType} - Retrying to PUT $url'),
     );
+
+    // Check if we are accessing a newly created resource and refresh token once
+    // if we get a 403 forbidden response.
+    //
+    // See issue : https://github.com/cph-cachet/carp.sensing-flutter/issues/392
+    if (response.statusCode == HttpStatus.forbidden) {
+      await CarpAuthService().refresh();
+      return put(url, headers: headers, body: body, encoding: encoding);
+    }
+
     return clean(response);
   }
 
@@ -186,6 +215,16 @@ class HTTPRetry {
       retryIf: (e) => e is SocketException || e is TimeoutException,
       onRetry: (e) => print('${e.runtimeType} - Retrying to DELETE $url'),
     );
+
+    // Check if we are accessing a newly created resource and refresh token once
+    // if we get a 403 forbidden response.
+    //
+    // See issue : https://github.com/cph-cachet/carp.sensing-flutter/issues/392
+    if (response.statusCode == HttpStatus.forbidden) {
+      await CarpAuthService().refresh();
+      return put(url, headers: headers);
+    }
+
     return clean(response);
   }
 
diff --git a/backends/carp_webservices/test/carp_properties.dart b/backends/carp_webservices/test/carp_properties.dart
index d5bfcaab..b786d619 100644
--- a/backends/carp_webservices/test/carp_properties.dart
+++ b/backends/carp_webservices/test/carp_properties.dart
@@ -11,7 +11,7 @@ class CarpProperties {
 
   Uri get uri => Uri(
         scheme: 'https',
-        host: 'dev.carp.dk',
+        host: cawsUri,
       );
 
   CarpAuthProperties get authProperties => CarpAuthProperties(
@@ -27,7 +27,7 @@ class CarpProperties {
       );
 
   CarpApp get app => CarpApp(
-        name: "CAWS @ DigitalOcean [DEV]",
+        name: "CAWS @ $cawsUri",
         uri: uri,
         studyDeploymentId: testDeploymentId,
         studyId: testStudyId,
diff --git a/backends/carp_webservices/test/credentials_template.dart b/backends/carp_webservices/test/credentials_template.dart
index 497c34a1..fa953b15 100644
--- a/backends/carp_webservices/test/credentials_template.dart
+++ b/backends/carp_webservices/test/credentials_template.dart
@@ -11,6 +11,8 @@
 // HOWEVER, remember to add the file to .gitignore in order not to commit
 // the authentication details.
 
+const String cawsUri = 'dev.carp.dk';
+
 // Username + password for the user doing the testing
 const String username = 'a_username';
 const String password = 'the_password';

From ce0ed328b5a24810e1871fd3e46dd5a46e2e11ce Mon Sep 17 00:00:00 2001
From: bardram <jakba@dtu.dk>
Date: Thu, 30 May 2024 22:06:46 +0200
Subject: [PATCH 3/4] refactor and optimization based on testing - update to
 unit tests too

---
 .../carp_webservices/analysis_options.yaml    |    3 +-
 .../cache/upload/batch-0.json                 |   10 +-
 .../cache/upload/batch-1.json                 |   10 +-
 .../example/analysis_options.yaml             |   28 -
 .../carp_webservices/example/lib/main.dart    |    9 +-
 .../lib/carp_services/carp_base_service.dart  |   96 +-
 .../lib/carp_services/carp_service.dart       |   27 +-
 .../lib/carp_services/carp_tasks.dart         |    5 -
 .../carp_services/collection_reference.dart   |   30 +-
 .../carp_services/data_point_reference.dart   |   25 +-
 .../lib/carp_services/document_reference.dart |   41 +-
 .../lib/carp_services/file_reference.dart     |    8 +-
 .../lib/carp_services/http_retry.dart         |  185 +-
 .../test/carp_data_stream_service_test.dart   |   23 +-
 .../test/carp_service_test.dart               |  199 +-
 .../carp_webservices/test/json/batch_2.json   | 2972 +++++++++++++++--
 16 files changed, 3003 insertions(+), 668 deletions(-)
 delete mode 100644 backends/carp_webservices/example/analysis_options.yaml

diff --git a/backends/carp_webservices/analysis_options.yaml b/backends/carp_webservices/analysis_options.yaml
index c9eb4528..47925a79 100644
--- a/backends/carp_webservices/analysis_options.yaml
+++ b/backends/carp_webservices/analysis_options.yaml
@@ -15,4 +15,5 @@ linter:
     cancel_subscriptions: true
     constant_identifier_names: false
     depend_on_referenced_packages: true
-    avoid_print: false
+    avoid_print: true
+    
diff --git a/backends/carp_webservices/cache/upload/batch-0.json b/backends/carp_webservices/cache/upload/batch-0.json
index 7ce40c68..a0ffd3f6 100644
--- a/backends/carp_webservices/cache/upload/batch-0.json
+++ b/backends/carp_webservices/cache/upload/batch-0.json
@@ -1,7 +1,7 @@
 [
  {
   "carp_header": {
-   "start_time": "2024-04-21T16:15:54.710227Z",
+   "start_time": "2024-05-30T13:18:31.845318Z",
    "data_format": {
     "namespace": "dk.cachet.carp",
     "name": "ambientlight"
@@ -17,7 +17,7 @@
  },
  {
   "carp_header": {
-   "start_time": "2024-04-21T16:15:54.710234Z",
+   "start_time": "2024-05-30T13:18:31.845325Z",
    "data_format": {
     "namespace": "dk.cachet.carp",
     "name": "ambientlight"
@@ -33,7 +33,7 @@
  },
  {
   "carp_header": {
-   "start_time": "2024-04-21T16:15:54.710242Z",
+   "start_time": "2024-05-30T13:18:31.845331Z",
    "data_format": {
     "namespace": "dk.cachet.carp",
     "name": "deviceinformation"
@@ -48,7 +48,7 @@
  },
  {
   "carp_header": {
-   "start_time": "2024-04-21T16:15:54.710245Z",
+   "start_time": "2024-05-30T13:18:31.845333Z",
    "data_format": {
     "namespace": "dk.cachet.carp",
     "name": "deviceinformation"
@@ -63,7 +63,7 @@
  },
  {
   "carp_header": {
-   "start_time": "2024-04-21T16:15:54.710247Z",
+   "start_time": "2024-05-30T13:18:31.845335Z",
    "data_format": {
     "namespace": "dk.cachet.carp",
     "name": "deviceinformation"
diff --git a/backends/carp_webservices/cache/upload/batch-1.json b/backends/carp_webservices/cache/upload/batch-1.json
index 7ce40c68..a0ffd3f6 100644
--- a/backends/carp_webservices/cache/upload/batch-1.json
+++ b/backends/carp_webservices/cache/upload/batch-1.json
@@ -1,7 +1,7 @@
 [
  {
   "carp_header": {
-   "start_time": "2024-04-21T16:15:54.710227Z",
+   "start_time": "2024-05-30T13:18:31.845318Z",
    "data_format": {
     "namespace": "dk.cachet.carp",
     "name": "ambientlight"
@@ -17,7 +17,7 @@
  },
  {
   "carp_header": {
-   "start_time": "2024-04-21T16:15:54.710234Z",
+   "start_time": "2024-05-30T13:18:31.845325Z",
    "data_format": {
     "namespace": "dk.cachet.carp",
     "name": "ambientlight"
@@ -33,7 +33,7 @@
  },
  {
   "carp_header": {
-   "start_time": "2024-04-21T16:15:54.710242Z",
+   "start_time": "2024-05-30T13:18:31.845331Z",
    "data_format": {
     "namespace": "dk.cachet.carp",
     "name": "deviceinformation"
@@ -48,7 +48,7 @@
  },
  {
   "carp_header": {
-   "start_time": "2024-04-21T16:15:54.710245Z",
+   "start_time": "2024-05-30T13:18:31.845333Z",
    "data_format": {
     "namespace": "dk.cachet.carp",
     "name": "deviceinformation"
@@ -63,7 +63,7 @@
  },
  {
   "carp_header": {
-   "start_time": "2024-04-21T16:15:54.710247Z",
+   "start_time": "2024-05-30T13:18:31.845335Z",
    "data_format": {
     "namespace": "dk.cachet.carp",
     "name": "deviceinformation"
diff --git a/backends/carp_webservices/example/analysis_options.yaml b/backends/carp_webservices/example/analysis_options.yaml
deleted file mode 100644
index 0d290213..00000000
--- a/backends/carp_webservices/example/analysis_options.yaml
+++ /dev/null
@@ -1,28 +0,0 @@
-# This file configures the analyzer, which statically analyzes Dart code to
-# check for errors, warnings, and lints.
-#
-# The issues identified by the analyzer are surfaced in the UI of Dart-enabled
-# IDEs (https://dart.dev/tools#ides-and-editors). The analyzer can also be
-# invoked from the command line by running `flutter analyze`.
-
-# The following line activates a set of recommended lints for Flutter apps,
-# packages, and plugins designed to encourage good coding practices.
-include: package:flutter_lints/flutter.yaml
-
-linter:
-  # The lint rules applied to this project can be customized in the
-  # section below to disable rules from the `package:flutter_lints/flutter.yaml`
-  # included above or to enable additional rules. A list of all available lints
-  # and their documentation is published at https://dart.dev/lints.
-  #
-  # Instead of disabling a lint rule for the entire project in the
-  # section below, it can also be suppressed for a single line of code
-  # or a specific dart file by using the `// ignore: name_of_lint` and
-  # `// ignore_for_file: name_of_lint` syntax on the line or in the file
-  # producing the lint.
-  rules:
-    # avoid_print: false  # Uncomment to disable the `avoid_print` rule
-    # prefer_single_quotes: true  # Uncomment to enable the `prefer_single_quotes` rule
-
-# Additional information about this file can be found at
-# https://dart.dev/guides/language/analysis-options
diff --git a/backends/carp_webservices/example/lib/main.dart b/backends/carp_webservices/example/lib/main.dart
index 3a0327e7..3adcb8a9 100644
--- a/backends/carp_webservices/example/lib/main.dart
+++ b/backends/carp_webservices/example/lib/main.dart
@@ -132,13 +132,16 @@ class AppBLoC {
   void dispose() async {}
 
   Future<ActiveParticipationInvitation?> getStudyInvitation(
-      BuildContext context) async {
+    BuildContext context,
+  ) async {
     // configure a participant service based on the carp service already configured
     CarpParticipationService().configureFrom(CarpService());
     _invitation = await CarpParticipationService().getStudyInvitation(context);
-    print('CARP Study Invitation: $_invitation');
+    debugPrint('CARP Study Invitation: $_invitation');
+
     // check that the app has been updated to reflect the study id and deployment id
-    print('Study ID: ${app.studyId}, Deployment ID: ${app.studyDeploymentId}');
+    debugPrint(
+        'Study ID: ${app.studyId}, Deployment ID: ${app.studyDeploymentId}');
     return _invitation;
   }
 }
diff --git a/backends/carp_webservices/lib/carp_services/carp_base_service.dart b/backends/carp_webservices/lib/carp_services/carp_base_service.dart
index 7c15599a..bb01cc4f 100644
--- a/backends/carp_webservices/lib/carp_services/carp_base_service.dart
+++ b/backends/carp_webservices/lib/carp_services/carp_base_service.dart
@@ -86,9 +86,12 @@ abstract class CarpBaseService {
     final String body = toJsonString(request.toJson());
     _endpointName = endpointName ?? rpcEndpointName;
 
-    debug('REQUEST: $rpcEndpointUri\n$body');
-    http.Response response = await httpr.post(Uri.encodeFull(rpcEndpointUri),
-        headers: headers, body: body);
+    debug('REQUEST: POST $rpcEndpointUri\n$body');
+    http.Response response = await httpr.post(
+      Uri.encodeFull(rpcEndpointUri),
+      headers: headers,
+      body: body,
+    );
     int httpStatusCode = response.statusCode;
     String responseBody = response.body;
     debug('RESPONSE: $httpStatusCode\n$responseBody');
@@ -115,4 +118,91 @@ abstract class CarpBaseService {
       path: responseJson["path"].toString(),
     );
   }
+
+  /// Sends an HTTP GET request to the given [url] for this CAWS service.
+  Future<http.Response> _get(String url) async {
+    debug('REQUEST: GET $url');
+
+    var response = await httpr.get(url, headers: headers);
+
+    debug('RESPONSE: ${response.statusCode}\n${response.body}');
+
+    // If we get a 403 forbidden response try to refresh token and retry once.
+    // See issue : https://github.com/cph-cachet/carp.sensing-flutter/issues/392
+    if (response.statusCode == HttpStatus.forbidden) {
+      await CarpAuthService().refresh();
+      response = await httpr.get(url, headers: headers);
+    }
+
+    return _clean(response);
+  }
+
+  /// Sends an HTTP POST request with [body] to the given [url] for this CAWS service.
+  Future<http.Response> _post(String url, {Object? body}) async {
+    debug('REQUEST: POST $url\n$body');
+
+    var response = await httpr.post(url, headers: headers, body: body);
+
+    debug('RESPONSE: ${response.statusCode}\n${response.body}');
+
+    if (response.statusCode == HttpStatus.forbidden) {
+      await CarpAuthService().refresh();
+      response = await httpr.post(url, headers: headers, body: body);
+    }
+
+    return _clean(response);
+  }
+
+  /// Sends an HTTP PUT request with [body] to the given [url] for this CAWS service.
+  Future<http.Response> _put(String url, {Object? body}) async {
+    debug('REQUEST: PUT $url\n$body');
+
+    var response = await httpr.put(url, headers: headers, body: body);
+
+    debug('RESPONSE: ${response.statusCode}\n${response.body}');
+
+    if (response.statusCode == HttpStatus.forbidden) {
+      await CarpAuthService().refresh();
+      response = await httpr.put(url, headers: headers, body: body);
+    }
+
+    return _clean(response);
+  }
+
+  /// Sends an HTTP DELETE request to the given [url] for this CAWS service.
+  Future<http.Response> _delete(String url) async {
+    debug('REQUEST: DELETE $url');
+
+    var response = await httpr.delete(url, headers: headers);
+
+    debug('RESPONSE: ${response.statusCode}\n${response.body}');
+
+    if (response.statusCode == HttpStatus.forbidden) {
+      await CarpAuthService().refresh();
+      response = await httpr.delete(url, headers: headers);
+    }
+
+    return _clean(response);
+  }
+
+  /// Check if we get an Nginx reverse proxy error in HTML format, and if so
+  /// convert it to a JSON error message.
+  ///
+  /// See issue : https://github.com/cph-cachet/carp.sensing-flutter/issues/369
+  http.Response _clean(http.Response response) =>
+      response.body.startsWith('<html>')
+          ? http.Response(
+              '{'
+              '"statusCode": 502,'
+              '"message": "502 Bad Gateway.",'
+              '"path": "POST ${response.request?.url}"'
+              '}',
+              response.statusCode,
+              headers: response.headers,
+              isRedirect: response.isRedirect,
+              persistentConnection: response.persistentConnection,
+              reasonPhrase: response.reasonPhrase,
+              request: response.request,
+            )
+          : response;
 }
diff --git a/backends/carp_webservices/lib/carp_services/carp_service.dart b/backends/carp_webservices/lib/carp_services/carp_service.dart
index 7eacfd3a..50918d6d 100644
--- a/backends/carp_webservices/lib/carp_services/carp_service.dart
+++ b/backends/carp_webservices/lib/carp_services/carp_service.dart
@@ -35,23 +35,6 @@ class CarpService extends CarpBaseService {
   @override
   CarpApp get app => nonNullAble(_app);
 
-  /// The headers for any authenticated HTTP REST call to this [CarpService].
-  @override
-  Map<String, String> get headers {
-    if (CarpAuthService().currentUser.token == null) {
-      throw CarpServiceException(
-          message:
-              "OAuth token is null. Call 'CarpAuthService().authenticate()' first.");
-    }
-
-    return {
-      "Content-Type": "application/json",
-      "Authorization":
-          "bearer ${CarpAuthService().currentUser.token!.accessToken}",
-      "cache-control": "no-cache"
-    };
-  }
-
   // --------------------------------------------------------------------------
   // CONSENT DOCUMENT
   // --------------------------------------------------------------------------
@@ -64,10 +47,11 @@ class CarpService extends CarpBaseService {
   /// Returns the created [ConsentDocument] if the document is uploaded correctly.
   Future<ConsentDocument> createConsentDocument(
       Map<String, dynamic> document) async {
+    debug('REQUEST: POST $consentDocumentEndpointUri');
+
     // POST the document to the CARP web service
-    http.Response response = await httpr.post(
+    http.Response response = await _post(
       consentDocumentEndpointUri,
-      headers: headers,
       body: json.encode(document),
     );
 
@@ -93,8 +77,9 @@ class CarpService extends CarpBaseService {
     String url = "$consentDocumentEndpointUri/$id";
 
     // GET the consent document from the CARP web service
-    http.Response response =
-        await httpr.get(Uri.encodeFull(url), headers: headers);
+    http.Response response = await _get(Uri.encodeFull(url));
+
+    debug('RESPONSE: ${response.statusCode}\n${response.body}');
 
     int httpStatusCode = response.statusCode;
     Map<String, dynamic> responseJson =
diff --git a/backends/carp_webservices/lib/carp_services/carp_tasks.dart b/backends/carp_webservices/lib/carp_services/carp_tasks.dart
index c5d07a59..3760ab81 100644
--- a/backends/carp_webservices/lib/carp_services/carp_tasks.dart
+++ b/backends/carp_webservices/lib/carp_services/carp_tasks.dart
@@ -75,14 +75,9 @@ class FileUploadTask extends CarpServiceTask {
 
     request.files.add(ClonableMultipartFile.fromFileSync(file.path));
 
-    print('files # : ${request.files.length}');
-
     httpr.send(request).then((http.StreamedResponse response) {
       response.stream.toStringStream().first.then((body) {
         final int httpStatusCode = response.statusCode;
-        print("httpStatusCode: $httpStatusCode");
-        print("response:\n$response");
-        print("body:\n$body");
         final Map<String, dynamic> map =
             json.decode(body) as Map<String, dynamic>;
 
diff --git a/backends/carp_webservices/lib/carp_services/collection_reference.dart b/backends/carp_webservices/lib/carp_services/collection_reference.dart
index 69bed181..f0153fb1 100644
--- a/backends/carp_webservices/lib/carp_services/collection_reference.dart
+++ b/backends/carp_webservices/lib/carp_services/collection_reference.dart
@@ -48,12 +48,12 @@ class CollectionReference extends CarpReference {
   /// Returns the path of this collection (relative to the root of the web service).
   String get path => _path;
 
-  /// The full CARP web service path to this collection.
-  String get carpPath =>
+  /// The full CARP Web Service (CAWS) path to this collection.
+  String get cawsPath =>
       '/api/studies/${service.app!.studyId}/collections/$path';
 
   /// The full URI for the collection endpoint for this [CollectionReference].
-  String get collectionUri => "${service.app!.uri.toString()}$carpPath";
+  String get collectionUri => "${service.app!.uri.toString()}$cawsPath";
 
   /// The full URI for the collection endpoint for this [CollectionReference] by its unique [id].
   String get collectionUriByID =>
@@ -63,16 +63,9 @@ class CollectionReference extends CarpReference {
   ///
   /// If no collection exists on the server (yet), this local CollectionReference is returned.
   Future<CollectionReference> get() async {
-    final restHeaders = headers;
-
-    debug('REQUEST: GET $collectionUri\n');
-
-    final response =
-        await httpr.get(Uri.encodeFull(collectionUri), headers: restHeaders);
+    final response = await service._get(collectionUri);
     int httpStatusCode = response.statusCode;
 
-    debug('RESPONSE: $httpStatusCode\n${response.body}\n');
-
     Map<String, dynamic> responseJson =
         json.decode(response.body) as Map<String, dynamic>;
     if (httpStatusCode == HttpStatus.ok) {
@@ -91,10 +84,7 @@ class CollectionReference extends CarpReference {
 
   /// Get the documents in this collection.
   Future<List<DocumentSnapshot>> get documents async {
-    final restHeaders = headers;
-
-    final response =
-        await httpr.get(Uri.encodeFull(collectionUri), headers: restHeaders);
+    final response = await service._get(collectionUri);
     int httpStatusCode = response.statusCode;
 
     final responseJson = json.decode(response.body) as Map<String, dynamic>;
@@ -107,7 +97,6 @@ class CollectionReference extends CarpReference {
           documents.add(DocumentSnapshot._('$path/$key', documentJson));
         }
       }
-
       return documents;
     }
 
@@ -150,8 +139,10 @@ class CollectionReference extends CarpReference {
   /// Rename this collection.
   Future<void> rename(String newName) async {
     // PUT the new name of this collection to the CARP web service
-    final response = await httpr.put(Uri.encodeFull(collectionUriByID),
-        headers: headers, body: '{"name":"$newName"}');
+    final response = await service._put(
+      collectionUriByID,
+      body: '{"name":"$newName"}',
+    );
     int httpStatusCode = response.statusCode;
     Map<String, dynamic> responseJson =
         json.decode(response.body) as Map<String, dynamic>;
@@ -172,8 +163,7 @@ class CollectionReference extends CarpReference {
 
   /// Deletes the collection referred to by this [CollectionReference].
   Future<void> delete() async {
-    final response =
-        await httpr.delete(Uri.encodeFull(collectionUriByID), headers: headers);
+    final response = await service._delete(collectionUriByID);
 
     int httpStatusCode = response.statusCode;
     if (httpStatusCode == HttpStatus.ok) {
diff --git a/backends/carp_webservices/lib/carp_services/data_point_reference.dart b/backends/carp_webservices/lib/carp_services/data_point_reference.dart
index 5a08ce86..c4281fa8 100644
--- a/backends/carp_webservices/lib/carp_services/data_point_reference.dart
+++ b/backends/carp_webservices/lib/carp_services/data_point_reference.dart
@@ -25,11 +25,8 @@ class DataPointReference extends CarpReference {
   ///
   /// Returns the server-generated ID for this data point.
   Future<int> post(DataPoint data) async {
-    final String url = dataEndpointUri;
-
-    // POST the data point to the CARP web service
-    http.Response response = await httpr.post(Uri.encodeFull(url),
-        headers: headers, body: json.encode(data));
+    final response =
+        await service._post(dataEndpointUri, body: json.encode(data));
 
     int httpStatusCode = response.statusCode;
     Map<String, dynamic> responseJson =
@@ -80,7 +77,7 @@ class DataPointReference extends CarpReference {
 
   /// Batch upload a list of [DataPoint]s.
   ///
-  /// Returns when successful. Throws an [CarpServiceException] if not.
+  /// Returns when successful. Throws a [CarpServiceException] if not.
   Future<void> batch(List<DataPoint> batch) async {
     if (batch.isEmpty) return;
 
@@ -96,7 +93,7 @@ class DataPointReference extends CarpReference {
   /// The [file] can be created using a [FileDataManager] in `carp_mobile_sensing`.
   /// Note that the file should be raw JSON, and hence _not_ zipped.
   ///
-  /// Returns when successful. Throws an [CarpServiceException] if not.
+  /// Returns when successful. Throws a [CarpServiceException] if not.
   Future<void> upload(File file) async {
     final String url = "$dataEndpointUri/batch";
 
@@ -130,11 +127,8 @@ class DataPointReference extends CarpReference {
 
   /// Get a [DataPoint] based on its [id] from the CARP backend.
   Future<DataPoint> get(int id) async {
-    String url = "$dataEndpointUri/$id";
-
-    // GET the data point from the CARP web service
-    http.Response response =
-        await httpr.get(Uri.encodeFull(url), headers: headers);
+    final url = "$dataEndpointUri/$id";
+    final response = await service._get(url);
 
     int httpStatusCode = response.statusCode;
     Map<String, dynamic> responseJson =
@@ -244,7 +238,7 @@ class DataPointReference extends CarpReference {
     // GET the data points from the CARP web service
     // TODO - for some reason the CARP web service don't like encoded url's....
     // http.Response response = await httpr.get(Uri.encodeFull(url), headers: restHeaders);
-    http.Response response = await httpr.get(url, headers: headers);
+    final response = await service._get(url);
 
     int httpStatusCode = response.statusCode;
 
@@ -297,10 +291,9 @@ class DataPointReference extends CarpReference {
   /// Returns on success. Throws a [CarpServiceException] if data point is not
   /// found or otherwise unsuccessful.
   Future<void> delete(int id) async {
-    String url = "$dataEndpointUri/$id";
+    final url = "$dataEndpointUri/$id";
 
-    http.Response response =
-        await httpr.delete(Uri.encodeFull(url), headers: headers);
+    final response = await service._delete(url);
     final int httpStatusCode = response.statusCode;
 
     if (httpStatusCode == HttpStatus.ok) return;
diff --git a/backends/carp_webservices/lib/carp_services/document_reference.dart b/backends/carp_webservices/lib/carp_services/document_reference.dart
index f4695fe5..e6a6c9ee 100644
--- a/backends/carp_webservices/lib/carp_services/document_reference.dart
+++ b/backends/carp_webservices/lib/carp_services/document_reference.dart
@@ -34,16 +34,16 @@ class DocumentReference extends CarpReference {
   /// The path to this document
   String get path => _path;
 
-  /// The full CARP web service path to this document.
+  /// The full CARP Web Service (CAWS) path to this document.
   ///
   /// If the id of this document is known, use the `documents` CARP endpoint,
   /// otherwise use the `collections` endpoint.
-  String get carpPath => (_id != null)
+  String get cawsPath => (_id != null)
       ? "/api/studies/${service.app!.studyId}/documents/$id"
       : "/api/studies/${service.app!.studyId}/collections/$path";
 
   /// The full URI for the document endpoint for this document.
-  String get documentUri => "${service.app!.uri.toString()}$carpPath";
+  String get documentUri => "${service.app!.uri.toString()}$cawsPath";
 
   /// Writes to the document referred to by this [DocumentReference].
   ///
@@ -55,8 +55,10 @@ class DocumentReference extends CarpReference {
 
     // If this document does not already exist on the server (i.e., have an ID), then create it
     if (id == null) {
-      http.Response response = await httpr.post(Uri.encodeFull(documentUri),
-          headers: headers, body: json.encode(data));
+      final response = await service._post(
+        documentUri,
+        body: json.encode(data),
+      );
       int httpStatusCode = response.statusCode;
       Map<String, dynamic> responseJson =
           json.decode(response.body) as Map<String, dynamic>;
@@ -91,13 +93,12 @@ class DocumentReference extends CarpReference {
 
     Map<String, dynamic> payload = {'name': name, 'data': data};
 
-    debug('REQUEST: PUT $documentUri\n$payload');
-
-    http.Response response = await httpr.put(Uri.encodeFull(documentUri),
-        headers: headers, body: json.encode(payload));
+    final response = await service._put(
+      documentUri,
+      body: json.encode(payload),
+    );
 
     int httpStatusCode = response.statusCode;
-    debug('RESPONSE: $httpStatusCode\n${response.body}');
     Map<String, dynamic> responseJson =
         json.decode(response.body) as Map<String, dynamic>;
 
@@ -131,9 +132,8 @@ class DocumentReference extends CarpReference {
     }
 
     Map<String, dynamic> payload = {'name': name};
-    http.Response response = await httpr.put(
+    final response = await service._put(
       Uri.encodeFull(documentUri),
-      headers: headers,
       body: json.encode(payload),
     );
 
@@ -156,15 +156,9 @@ class DocumentReference extends CarpReference {
   ///
   /// If no document exists, the read will return `null`.
   Future<DocumentSnapshot?> get() async {
-    debug('REQUEST: GET $documentUri\n');
-
-    http.Response response =
-        await httpr.get(Uri.encodeFull(documentUri), headers: headers);
-
+    final response = await service._get(documentUri);
     int httpStatusCode = response.statusCode;
 
-    debug('RESPONSE: $httpStatusCode\n${response.body}');
-
     if (httpStatusCode == HttpStatus.ok) {
       Map<String, dynamic> jsonResponse =
           json.decode(response.body) as Map<String, dynamic>;
@@ -181,10 +175,9 @@ class DocumentReference extends CarpReference {
     if (id == null) _id = (await get())?.id;
     if (_id == null) return; // early out if this document does not exist
 
-    http.Response response = await http
-        .delete(Uri.parse(Uri.encodeFull(documentUri)), headers: headers);
-
+    final response = await service._delete(documentUri);
     int httpStatusCode = response.statusCode;
+
     if (httpStatusCode == HttpStatus.ok) {
       return;
     } else {
@@ -286,7 +279,9 @@ class DocumentSnapshot {
   }
 
   /// Contains all the data of this snapshot
-  Map<String, dynamic> get data => _snapshot['data'] as Map<String, dynamic>;
+  Map<String, dynamic> get data => _snapshot['data'] != null
+      ? _snapshot['data'] as Map<String, dynamic>
+      : {};
 
   /// Reads individual data values from the snapshot
   dynamic operator [](String key) => data[key];
diff --git a/backends/carp_webservices/lib/carp_services/file_reference.dart b/backends/carp_webservices/lib/carp_services/file_reference.dart
index 99a8dce5..d837dfd8 100644
--- a/backends/carp_webservices/lib/carp_services/file_reference.dart
+++ b/backends/carp_webservices/lib/carp_services/file_reference.dart
@@ -49,14 +49,11 @@ class FileStorageReference extends CarpReference {
     assert(id > 0);
     final String url = "$fileEndpointUri/$id";
 
-    http.Response response =
-        await httpr.get(Uri.encodeFull(url), headers: headers);
+    final response = await service._get(url);
     int httpStatusCode = response.statusCode;
     Map<String, dynamic> map =
         json.decode(response.body) as Map<String, dynamic>;
 
-    print(response.body);
-
     switch (httpStatusCode) {
       case HttpStatus.ok:
         {
@@ -79,8 +76,7 @@ class FileStorageReference extends CarpReference {
     assert(id > 0);
     final String url = "$fileEndpointUri/$id";
 
-    http.Response response =
-        await httpr.delete(Uri.encodeFull(url), headers: headers);
+    final response = await service._delete(url);
     int httpStatusCode = response.statusCode;
 
     switch (httpStatusCode) {
diff --git a/backends/carp_webservices/lib/carp_services/http_retry.dart b/backends/carp_webservices/lib/carp_services/http_retry.dart
index c79fe745..ad1c9400 100644
--- a/backends/carp_webservices/lib/carp_services/http_retry.dart
+++ b/backends/carp_webservices/lib/carp_services/http_retry.dart
@@ -83,7 +83,7 @@ class HTTPRetry {
       maxAttempts: 15,
       retryIf: (e) => e is SocketException || e is TimeoutException,
       onRetry: (e) {
-        print('${e.runtimeType} - Retrying to SEND ${request.url}');
+        debugPrint('${e.runtimeType} - Retrying to SEND ${request.url}');
 
         // when retrying sending form data, the request needs to be cloned
         // see e.g. >> https://github.com/flutterchina/dio/issues/482
@@ -101,31 +101,19 @@ class HTTPRetry {
   }
 
   /// Sends an HTTP GET request with the given [headers] to the given [url].
-  Future<http.Response> get(String url, {Map<String, String>? headers}) async {
-    final response = await retry(
-      () => client
-          .get(
-            Uri.parse(Uri.encodeFull(url)),
-            headers: headers,
-          )
-          .timeout(const Duration(seconds: 20)),
-      delayFactor: const Duration(seconds: 5),
-      maxAttempts: 15,
-      retryIf: (e) => e is SocketException || e is TimeoutException,
-      onRetry: (e) => print('${e.runtimeType} - Retrying to GET $url'),
-    );
-
-    // Check if we are accessing a newly created resource and refresh token once
-    // if we get a 403 forbidden response.
-    //
-    // See issue : https://github.com/cph-cachet/carp.sensing-flutter/issues/392
-    if (response.statusCode == HttpStatus.forbidden) {
-      await CarpAuthService().refresh();
-      return get(url, headers: headers);
-    }
-
-    return clean(response);
-  }
+  Future<http.Response> get(String url, {Map<String, String>? headers}) async =>
+      await retry(
+        () => client
+            .get(
+              Uri.parse(Uri.encodeFull(url)),
+              headers: headers,
+            )
+            .timeout(const Duration(seconds: 20)),
+        delayFactor: const Duration(seconds: 5),
+        maxAttempts: 15,
+        retryIf: (e) => e is SocketException || e is TimeoutException,
+        onRetry: (e) => debugPrint('${e.runtimeType} - Retrying to GET $url'),
+      );
 
   /// Sends an HTTP POST request with the given [headers] and [body] to the given [url].
   Future<http.Response> post(
@@ -133,34 +121,21 @@ class HTTPRetry {
     Map<String, String>? headers,
     Object? body,
     Encoding? encoding,
-  }) async {
-    // calling the http POST method using the retry approach
-    final response = await retry(
-      () => client
-          .post(
-            Uri.parse(Uri.encodeFull(url)),
-            headers: headers,
-            body: body,
-            encoding: encoding,
-          )
-          .timeout(const Duration(seconds: 20)),
-      delayFactor: const Duration(seconds: 5),
-      maxAttempts: 15,
-      retryIf: (e) => e is SocketException || e is TimeoutException,
-      onRetry: (e) => print('${e.runtimeType} - Retrying to POST $url'),
-    );
-
-    // Check if we are accessing a newly created resource and refresh token once
-    // if we get a 403 forbidden response.
-    //
-    // See issue : https://github.com/cph-cachet/carp.sensing-flutter/issues/392
-    if (response.statusCode == HttpStatus.forbidden) {
-      await CarpAuthService().refresh();
-      return post(url, headers: headers, body: body, encoding: encoding);
-    }
-
-    return clean(response);
-  }
+  }) async =>
+      await retry(
+        () => client
+            .post(
+              Uri.parse(Uri.encodeFull(url)),
+              headers: headers,
+              body: body,
+              encoding: encoding,
+            )
+            .timeout(const Duration(seconds: 20)),
+        delayFactor: const Duration(seconds: 5),
+        maxAttempts: 15,
+        retryIf: (e) => e is SocketException || e is TimeoutException,
+        onRetry: (e) => debugPrint('${e.runtimeType} - Retrying to POST $url'),
+      );
 
   /// Sends an HTTP PUT request with the given [headers] and [body] to the given [url].
   Future<http.Response> put(
@@ -168,84 +143,38 @@ class HTTPRetry {
     Map<String, String>? headers,
     Object? body,
     Encoding? encoding,
-  }) async {
-    // calling the http PUT method using the retry approach
-    final response = await retry(
-      () => client
-          .put(
-            Uri.parse(Uri.encodeFull(url)),
-            headers: headers,
-            body: body,
-            encoding: encoding,
-          )
-          .timeout(const Duration(seconds: 20)),
-      delayFactor: const Duration(seconds: 5),
-      maxAttempts: 15,
-      retryIf: (e) => e is SocketException || e is TimeoutException,
-      onRetry: (e) => print('${e.runtimeType} - Retrying to PUT $url'),
-    );
-
-    // Check if we are accessing a newly created resource and refresh token once
-    // if we get a 403 forbidden response.
-    //
-    // See issue : https://github.com/cph-cachet/carp.sensing-flutter/issues/392
-    if (response.statusCode == HttpStatus.forbidden) {
-      await CarpAuthService().refresh();
-      return put(url, headers: headers, body: body, encoding: encoding);
-    }
-
-    return clean(response);
-  }
+  }) async =>
+      await retry(
+        () => client
+            .put(
+              Uri.parse(Uri.encodeFull(url)),
+              headers: headers,
+              body: body,
+              encoding: encoding,
+            )
+            .timeout(const Duration(seconds: 20)),
+        delayFactor: const Duration(seconds: 5),
+        maxAttempts: 15,
+        retryIf: (e) => e is SocketException || e is TimeoutException,
+        onRetry: (e) => debugPrint('${e.runtimeType} - Retrying to PUT $url'),
+      );
 
   /// Sends an HTTP DELETE request with the given [headers] to the given [url].
   Future<http.Response> delete(
     String url, {
     Map<String, String>? headers,
-  }) async {
-    // calling the http DELETE method using the retry approach
-    final response = await retry(
-      () => client
-          .delete(
-            Uri.parse(Uri.encodeFull(url)),
-            headers: headers,
-          )
-          .timeout(const Duration(seconds: 15)),
-      delayFactor: const Duration(seconds: 5),
-      maxAttempts: 15,
-      retryIf: (e) => e is SocketException || e is TimeoutException,
-      onRetry: (e) => print('${e.runtimeType} - Retrying to DELETE $url'),
-    );
-
-    // Check if we are accessing a newly created resource and refresh token once
-    // if we get a 403 forbidden response.
-    //
-    // See issue : https://github.com/cph-cachet/carp.sensing-flutter/issues/392
-    if (response.statusCode == HttpStatus.forbidden) {
-      await CarpAuthService().refresh();
-      return put(url, headers: headers);
-    }
-
-    return clean(response);
-  }
-
-  /// Check if we get an Nginx reverse proxy error in HTML format, and if so
-  /// convert it to a JSON error message.
-  ///
-  /// See issue : https://github.com/cph-cachet/carp.sensing-flutter/issues/369
-  http.Response clean(http.Response response) =>
-      response.body.startsWith('<html>')
-          ? http.Response(
-              '{'
-              '"statusCode": 502,'
-              '"message": "502 Bad Gateway.",'
-              '"path": "POST ${response.request?.url}"'
-              '}',
-              response.statusCode,
-              headers: response.headers,
-              isRedirect: response.isRedirect,
-              persistentConnection: response.persistentConnection,
-              reasonPhrase: response.reasonPhrase,
-              request: response.request,
+  }) async =>
+      await retry(
+        () => client
+            .delete(
+              Uri.parse(Uri.encodeFull(url)),
+              headers: headers,
             )
-          : response;
+            .timeout(const Duration(seconds: 15)),
+        delayFactor: const Duration(seconds: 5),
+        maxAttempts: 15,
+        retryIf: (e) => e is SocketException || e is TimeoutException,
+        onRetry: (e) =>
+            debugPrint('${e.runtimeType} - Retrying to DELETE $url'),
+      );
 }
diff --git a/backends/carp_webservices/test/carp_data_stream_service_test.dart b/backends/carp_webservices/test/carp_data_stream_service_test.dart
index 972d7fc6..5bc11486 100644
--- a/backends/carp_webservices/test/carp_data_stream_service_test.dart
+++ b/backends/carp_webservices/test/carp_data_stream_service_test.dart
@@ -36,8 +36,8 @@ void main() {
 
   group("Base services", () {
     test('- authentication', () async {
-      print('CarpService : ${CarpService().app}');
-      print(" - signed in as: $user");
+      debugPrint('CarpService : ${CarpService().app}');
+      debugPrint(" - signed in as: $user");
     }, skip: false);
   });
 
@@ -83,7 +83,7 @@ void main() {
               triggerIds: {0}),
         ];
 
-        print(toJsonString(batch));
+        debugPrint(toJsonString(batch));
 
         await CarpDataStreamService()
             .appendToDataStreams(testDeploymentId, batch);
@@ -93,7 +93,7 @@ void main() {
     test(
       '- append - measurements UNKNOWN to carp-core.kotlin',
       () async {
-        print('Start uploading...');
+        debugPrint('Start uploading...');
 
         var m1 = Measurement(
           sensorStartTime: 1642505045000000,
@@ -131,7 +131,7 @@ void main() {
           DataStreamId(
             studyDeploymentId: testDeploymentId,
             deviceRoleName: phoneRoleName,
-            dataType: Geolocation.dataType,
+            dataType: BatteryState.dataType,
           ),
           0,
           100,
@@ -141,6 +141,7 @@ void main() {
       },
     );
 
+    // Some test data
     List<DataStreamBatch> geoLocationBatch = [
       DataStreamBatch(
           dataStream: DataStreamId(
@@ -186,14 +187,14 @@ void main() {
         var list = await getGeoLocationBatches();
         print('N = ${list.length}');
 
-        print('Uploading another batch of Geolocation measurements...');
-        await CarpDataStreamService()
-            .appendToDataStreams(testDeploymentId, geoLocationBatch);
+        // print('Uploading another batch of Geolocation measurements...');
+        // await CarpDataStreamService()
+        //     .appendToDataStreams(testDeploymentId, geoLocationBatch);
 
-        var list2 = await getGeoLocationBatches();
-        print('N = ${list2.length}');
+        // var list2 = await getGeoLocationBatches();
+        // print('N = ${list2.length}');
 
-        expect(list2.length, list.length + 1);
+        // expect(list2.length, list.length + 1);
       },
     );
   });
diff --git a/backends/carp_webservices/test/carp_service_test.dart b/backends/carp_webservices/test/carp_service_test.dart
index 10a25f2c..7303e05d 100644
--- a/backends/carp_webservices/test/carp_service_test.dart
+++ b/backends/carp_webservices/test/carp_service_test.dart
@@ -124,13 +124,15 @@ void main() {
         });
 
         test('- get', () async {
-          ConsentDocument uploaded = await CarpService().createConsentDocument(
-              {"text": "The original terms text.", "signature": "Image Blob"});
+          // ConsentDocument uploaded = await CarpService().createConsentDocument(
+          //     {"text": "The original terms text.", "signature": "Image Blob"});
 
-          expect(uploaded.id, isNotNull);
+          // print(uploaded);
+          // expect(uploaded.id, isNotNull);
 
           ConsentDocument downloaded =
-              await CarpService().getConsentDocument(uploaded.id);
+              await CarpService().getConsentDocument(1);
+          // await CarpService().getConsentDocument(uploaded.id);
 
           print(downloaded);
           print('id        : ${downloaded.id}');
@@ -180,6 +182,9 @@ void main() {
           });
 
           test('- batch', () async {
+            final before = await CarpService().getDataPointReference().getAll();
+            print('N_before = ${before.length}');
+
             List<DataPoint> batch = [];
             batch.addAll([
               DataPoint.fromData(lightData),
@@ -196,14 +201,13 @@ void main() {
             await reference.batch(batch);
 
             // wait for the batch requests to finish
-            await Future.delayed(const Duration(seconds: 2), () {});
+            await Future.delayed(const Duration(seconds: 5), () {});
 
-            List<DataPoint> data =
-                await CarpService().getDataPointReference().getAll();
-            print('N=${data.length}');
+            final after = await CarpService().getDataPointReference().getAll();
+            print('N_after = ${after.length}');
             // data.forEach((datapoint) => print(_encode((datapoint.toJson()))));
 
-            assert(data.length >= 5);
+            assert(after.length > before.length);
           });
 
           test('- upload', () async {
@@ -227,6 +231,9 @@ void main() {
 
           test('- query for test data points', () async {
             String query = 'carp_header.data_format.namespace==test';
+            // String query =
+            //     'carp_header.data_format.name==${lightData.format.name}';
+
             print("query : $query");
             List<DataPoint> data =
                 await CarpService().getDataPointReference().query(query);
@@ -287,7 +294,7 @@ void main() {
               List<DataPoint> data =
                   await CarpService().getDataPointReference().getAll();
 
-              //data.forEach((datapoint) => print(_encode((datapoint.toJson()))));
+              data.forEach((datapoint) => print(_encode((datapoint.toJson()))));
               expect(data, isNotNull);
               print('N=${data.length}');
             },
@@ -309,7 +316,8 @@ void main() {
             // String query =
             //     'carp_header.user_id==$userId;carp_body.timestamp>2019-11-02T12:53:40.219598Z';
             //String query = 'carp_header.data_format.namespace==test';
-            String query = 'carp_header.data_format.name==light';
+            String query =
+                'carp_header.data_format.name==${lightData.format.name}';
             // String query = 'carp_header.user_id==$userId';
             //String query = 'carp_body.timestamp>2019-11-02T12:53:40.219598Z';
             //String query = 'carp_header.data_format.namespace=in=(carp,omh)';
@@ -368,8 +376,17 @@ void main() {
         skip: false,
       );
 
-      group("Documents & Collections", () {
-        test(' - delete document by path', () async {
+      /// In order to run the test in this group you need to be authenticated
+      /// as a participant.
+      group("Documents & Collections - PARTICIPANT", () {
+        test(' - clean up old test documents', () async {
+          await CarpService()
+              .collection(collectionName)
+              .document(userId)
+              .collection('activities')
+              .document('cooking')
+              .delete();
+
           await CarpService()
               .collection(collectionName)
               .document(userId)
@@ -505,87 +522,37 @@ void main() {
 //       assert(serverDocument.data.length == document.data.length);
 //     }, skip: true);
 
-        // NOTE :: In order to run the following two tests (query) you need to be
-        // authenticated as a researcher (and not as a participant).
-        test(' - get documents by query', () async {
-          var document = await CarpService()
-              .collection(collectionName)
-              .document(userId)
-              .setData({'email': userId, 'role': 'Administrator'});
-
-          expect(document, isNotNull);
-
-          String query = 'name==$userId';
-          List<DocumentSnapshot> documents =
-              await CarpService().documentsByQuery(query);
-
-          print("Found ${documents.length} document(s) for user '$userId'");
-          for (var document in documents) {
-            print(' - $document');
-          }
-
-          expect(documents.length, greaterThan(0));
-        });
-
-        test(' - get all documents', () async {
-          List<DocumentSnapshot> documents = await CarpService().documents();
-
-          print('Found ${documents.length} document(s)');
-          for (var document in documents) {
-            print(' - $document');
-          }
-          expect(documents.length, greaterThan(0));
-        });
-
-        test(' - add document in nested collections', () async {
+        test(' - add & get document in nested collections', () async {
           // is not providing an document id, so this should create a new document
           // if the collection don't exist, it is created (according to David).
-          DocumentSnapshot newDocument = await CarpService()
+          DocumentSnapshot doc1 = await CarpService()
               .collection(collectionName)
               .document(userId)
               .collection('activities')
               .document('cooking')
               .setData({'what': 'breakfast', 'time': 'morning'});
 
-          print(newDocument);
-          expect(newDocument.id, greaterThan(0));
-          expect(newDocument.path,
-              equals('$collectionName/$userId/activities/cooking'));
-
-          // delete document again
-          await CarpService()
-              .collection(collectionName)
-              .document(userId)
-              .delete();
-        });
-
-        test(' - get nested document', () async {
-          var document = await CarpService()
-              .collection(collectionName)
-              .document(userId)
-              .setData({'email': userId, 'role': 'Administrator'});
-
-          expect(document, isNotNull);
+          print(doc1);
+          expect(doc1.id, greaterThan(0));
+          expect(
+              doc1.path, equals('$collectionName/$userId/activities/cooking'));
 
-          DocumentSnapshot? newDocument = await CarpService()
+          DocumentSnapshot? doc2 = await CarpService()
               .collection(collectionName)
               .document(userId)
               .collection('activities')
               .document('cooking')
               .get();
 
-          // expect(newDocument?.id, greaterThan(0));
-
-          print(newDocument);
-          print(newDocument?.snapshot);
-          print(newDocument?.createdAt);
-          print(newDocument?.data);
-          // print(newDocument['what']);
+          expect(doc2, isNotNull);
+          expect(doc2?.id, doc1.id);
 
           // delete document again
           await CarpService()
               .collection(collectionName)
               .document(userId)
+              .collection('activities')
+              .document('cooking')
               .delete();
         });
 
@@ -604,14 +571,21 @@ void main() {
         });
 
         test(" - get a collection from path name", () async {
+          await CarpService()
+              .collection(collectionName)
+              .document(userId)
+              .setData({'email': userId, 'role': 'Administrator'});
+
           CollectionReference collection =
               await CarpService().collection(collectionName).get();
-          print(collection);
+          expect(collection.path, collectionName);
         });
 
         test(" - list documents in a collection", () async {
           List<DocumentSnapshot> documents =
               await CarpService().collection(collectionName).documents;
+
+          print('N = ${documents.length}');
           for (var doc in documents) {
             print(doc);
           }
@@ -675,9 +649,41 @@ void main() {
               .document(document.name)
               .delete();
         });
+      }, skip: false);
+
+      /// In order to run the test in this group you need to be authenticated
+      /// as a researcher.
+      group("Documents & Collections - RESEARCHER", () {
+        test(' - get documents by query', () async {
+          var document = await CarpService()
+              .collection(collectionName)
+              .document(userId)
+              .setData({'email': userId, 'role': 'Administrator'});
+
+          expect(document, isNotNull);
+
+          String query = 'name==$userId';
+          List<DocumentSnapshot> documents =
+              await CarpService().documentsByQuery(query);
+
+          print("Found ${documents.length} document(s) for user '$userId'");
+          for (var document in documents) {
+            print(' - $document');
+          }
+
+          expect(documents.length, greaterThan(0));
+        });
+
+        test(' - get all documents', () async {
+          List<DocumentSnapshot> documents = await CarpService().documents();
+
+          print('Found ${documents.length} document(s)');
+          for (var document in documents) {
+            print(' - $document');
+          }
+          expect(documents.length, greaterThan(0));
+        });
 
-        // NOTE :: In order to run the following two tests (rename & delete)
-        // you need to be authenticated as a researcher.
         test(' - rename collection', () async {
           CollectionReference collection =
               await CarpService().collection(collectionName).get();
@@ -692,10 +698,12 @@ void main() {
 
         test(' - delete collection', () async {
           CollectionReference collection =
-              await CarpService().collection(newCollectionName).get();
+              await CarpService().collection(collectionName).get();
+
           await collection.delete();
           expect(collection.id, -1);
           print(collection);
+
           try {
             collection =
                 await CarpService().collection(newCollectionName).get();
@@ -707,42 +715,7 @@ void main() {
         });
       }, skip: false);
 
-      group("iPDM-GO", () {
-        test(" - get 'patients' collection from path", () async {
-          CollectionReference collection =
-              await CarpService().collection('patients').get();
-          expect(collection.id!, greaterThan(0));
-          print(collection);
-        });
-
-        test(" - list all nested documents in 'patients' collection", () async {
-          List<DocumentSnapshot> documents =
-              await CarpService().collection('patients').documents;
-          for (var doc in documents) {
-            print(doc);
-            for (var col in doc.collections) {
-              print(col);
-            }
-          }
-        });
-        test(
-            " - list all nested documents in 'patients/s174238@student.dtu.dk/chapters' collection",
-            () async {
-          List<DocumentSnapshot> documents = await CarpService()
-              .collection('patients/s174238@student.dtu.dk/chapters')
-              .documents;
-          for (var doc in documents) {
-            print(doc);
-            for (var col in doc.collections) {
-              print(col);
-            }
-          }
-        });
-      }, skip: true);
-
       group("Files", () {
-        // int id = -1;
-
         test('- upload', () async {
           final File myFile = File("test/img.jpg");
 
diff --git a/backends/carp_webservices/test/json/batch_2.json b/backends/carp_webservices/test/json/batch_2.json
index 48fed598..9dae1dc3 100644
--- a/backends/carp_webservices/test/json/batch_2.json
+++ b/backends/carp_webservices/test/json/batch_2.json
@@ -1,281 +1,2693 @@
 [
-{"header":{"study_id":"2","user_id":"72c04755-5189-4f8e-87be-19962cffe1b4","start_time":"2020-12-13T21:48:12.012504Z","data_format":{"namespace":"test","name":"device"}},"body":{"id":"e5827520-3d8c-11eb-9c5f-b9727a7bb39f","timestamp":"2020-12-13T21:48:12.012504Z","platform":"Android","device_id":"QP1A.190711.020","hardware":"exynos9820","device_name":"beyond0","device_manufacturer":"samsung","device_model":"SM-G970F","operating_system":"REL"}}
-,
-{"header":{"study_id":"2","user_id":"72c04755-5189-4f8e-87be-19962cffe1b4","start_time":"2020-12-13T21:48:12.084662Z","data_format":{"namespace":"test","name":"pedometer"}},"body":{"id":"e58cae50-3d8c-11eb-862e-33201a3f785f","timestamp":"2020-12-13T21:48:12.084662Z","step_count":0}}
-,
-{"header":{"study_id":"2","user_id":"72c04755-5189-4f8e-87be-19962cffe1b4","start_time":"2020-12-13T21:48:12.142111Z","data_format":{"namespace":"test","name":"battery"}},"body":{"id":"e59560e0-3d8c-11eb-8d00-fd47e60237a8","timestamp":"2020-12-13T21:48:12.142111Z","battery_level":100,"battery_status":"full"}}
-,
-{"header":{"study_id":"2","user_id":"72c04755-5189-4f8e-87be-19962cffe1b4","start_time":"2020-12-13T21:48:12.178226Z","data_format":{"namespace":"test","name":"activity"}},"body":{"id":"e59adf20-3d8c-11eb-a81a-d7f10d6f9622","timestamp":"2020-12-13T21:48:12.178226Z","confidence":100,"type":"STILL"}}
-,
-{"header":{"study_id":"2","user_id":"72c04755-5189-4f8e-87be-19962cffe1b4","start_time":"2020-12-13T21:48:12.225741Z","data_format":{"namespace":"test","name":"location"}},"body":{"id":"e5a23220-3d8c-11eb-9d4e-a96364848492","timestamp":"2020-12-13T21:48:12.225741Z","time":"2020-12-13T21:48:12.210Z","latitude":55.7943684,"longitude":12.4462731,"altitude":76.30000305175781,"accuracy":20.0,"speed":0.0,"speed_accuracy":0.0,"heading":0.0}}
-,
-{"header":{"study_id":"2","user_id":"72c04755-5189-4f8e-87be-19962cffe1b4","start_time":"2020-12-13T21:48:12.376648Z","data_format":{"namespace":"test","name":"activity"}},"body":{"id":"e5b91580-3d8c-11eb-b03d-c9529d231e90","timestamp":"2020-12-13T21:48:12.376648Z","confidence":100,"type":"STILL"}}
-,
-{"header":{"study_id":"2","user_id":"72c04755-5189-4f8e-87be-19962cffe1b4","start_time":"2020-12-13T21:48:12.379782Z","data_format":{"namespace":"test","name":"activity"}},"body":{"id":"e5b9b1c0-3d8c-11eb-b6d2-5dfb76d768ac","timestamp":"2020-12-13T21:48:12.379782Z","confidence":100,"type":"STILL"}}
-,
-{"header":{"study_id":"2","user_id":"72c04755-5189-4f8e-87be-19962cffe1b4","start_time":"2020-12-13T21:48:12.382835Z","data_format":{"namespace":"test","name":"activity"}},"body":{"id":"e5ba4e00-3d8c-11eb-8fb7-77563fc74837","timestamp":"2020-12-13T21:48:12.382835Z","confidence":100,"type":"STILL"}}
-,
-{"header":{"study_id":"2","user_id":"72c04755-5189-4f8e-87be-19962cffe1b4","start_time":"2020-12-13T21:48:12.484619Z","data_format":{"namespace":"test","name":"weather"}},"body":{"id":"e5c99040-3d8c-11eb-b3b9-7343e2749bf3","timestamp":"2020-12-13T21:48:12.484619Z","country":"DK","area_name":"Virum","weather_main":"Clouds","weather_description":"scattered clouds","date":"2020-12-13T22:48:12.000","sunrise":"2020-12-13T08:32:35.000","sunset":"2020-12-13T15:36:41.000","latitude":55.79,"longitude":12.45,"pressure":1013.0,"wind_speed":0.89,"wind_degree":105.0,"humidity":86.0,"cloudiness":29.0,"rain_last_hour":0.0,"rain_last3_hours":0.0,"snow_last_hour":0.0,"snow_last3_hours":0.0,"temperature":4.830000000000041,"temp_min":4.439999999999998,"temp_max":5.0}}
-,
-{"header":{"study_id":"2","user_id":"72c04755-5189-4f8e-87be-19962cffe1b4","start_time":"2020-12-13T21:48:12.622245Z","data_format":{"namespace":"test","name":"location"}},"body":{"id":"e5de9ee0-3d8c-11eb-9b42-ffd13ddf3868","timestamp":"2020-12-13T21:48:12.622245Z","time":"2020-12-13T22:48:12.129","latitude":55.7943684,"longitude":12.4462731,"altitude":76.30000305175781,"accuracy":20.0,"speed":0.0,"speed_accuracy":0.0,"heading":0.0}}
-,
-{"header":{"study_id":"2","user_id":"72c04755-5189-4f8e-87be-19962cffe1b4","start_time":"2020-12-13T21:48:12.646145Z","data_format":{"namespace":"test","name":"battery"}},"body":{"id":"e5e24860-3d8c-11eb-883b-191890b08ff0","timestamp":"2020-12-13T21:48:12.646145Z","battery_level":100,"battery_status":"full"}}
-,
-{"header":{"study_id":"2","user_id":"72c04755-5189-4f8e-87be-19962cffe1b4","start_time":"2020-12-13T21:48:13.688509Z","data_format":{"namespace":"test","name":"air_quality"}},"body":{"id":"e6814780-3d8c-11eb-9727-45f093ababc3","timestamp":"2020-12-13T21:48:13.688509Z","air_quality_index":10,"source":"The Department of Environmental Science at Aarhus University","place":"H.C. Ørsted Institutet, Copenhagen, Denmark","latitude":55.7007621,"longitude":12.5613124,"air_quality_level":"GOOD"}}
-,
-{"header":{"study_id":"2","user_id":"72c04755-5189-4f8e-87be-19962cffe1b4","start_time":"2020-12-13T21:48:22.822578Z","data_format":{"namespace":"test","name":"battery"}},"body":{"id":"ebf30460-3d8c-11eb-9d97-932bd6af8d63","timestamp":"2020-12-13T21:48:22.822578Z","battery_level":100,"battery_status":"full"}}
-,
-{"header":{"study_id":"2","user_id":"72c04755-5189-4f8e-87be-19962cffe1b4","start_time":"2020-12-13T21:48:24.097434Z","data_format":{"namespace":"test","name":"light"}},"body":{"id":"ecb59110-3d8c-11eb-8781-11dd1fbb293a","timestamp":"2020-12-13T21:48:24.097434Z","mean_lux":11.5,"std_lux":0.5,"min_lux":11,"max_lux":12}}
-,
-{"header":{"study_id":"2","user_id":"72c04755-5189-4f8e-87be-19962cffe1b4","start_time":"2020-12-13T21:48:34.025069Z","data_format":{"namespace":"test","name":"light"}},"body":{"id":"f2a07590-3d8c-11eb-831e-25d6ad87ccc7","timestamp":"2020-12-13T21:48:34.025069Z","mean_lux":13.0,"std_lux":0.7071067811865476,"min_lux":12,"max_lux":14}}
-,
-{"header":{"study_id":"2","user_id":"72c04755-5189-4f8e-87be-19962cffe1b4","start_time":"2020-12-13T21:48:44.021225Z","data_format":{"namespace":"test","name":"light"}},"body":{"id":"f895ba50-3d8c-11eb-b3dd-f3b750bdd810","timestamp":"2020-12-13T21:48:44.021225Z","mean_lux":10.666666666666666,"std_lux":0.4714045207910317,"min_lux":10,"max_lux":11}}
-,
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+    }
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+      "start_time": "2020-12-13T22:03:14.592919Z",
+      "data_format": {
+        "namespace": "test",
+        "name": "air_quality"
+      }
+    },
+    "body": {
+      "id": "ff7c7910-3d8e-11eb-b727-6f118311cc18",
+      "timestamp": "2020-12-13T22:03:14.592919Z",
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+      "source": "The Department of Environmental Science at Aarhus University",
+      "place": "H.C. Ørsted Institutet, Copenhagen, Denmark",
+      "latitude": 55.7007621,
+      "longitude": 12.5613124,
+      "air_quality_level": "GOOD"
+    }
+  }
+]
\ No newline at end of file

From 8c7454be4ea626afb97c287245491f0a240427ce Mon Sep 17 00:00:00 2001
From: bardram <jakba@dtu.dk>
Date: Fri, 31 May 2024 12:24:43 +0200
Subject: [PATCH 4/4] fixing linter issues

---
 backends/carp_webservices/CHANGELOG.md        |   3 +-
 .../carp_webservices/example/pubspec.yaml     |   2 +
 .../carp_services/data_point_reference.dart   |   1 -
 .../lib/carp_services/document_reference.dart |   4 -
 backends/carp_webservices/pubspec.yaml        |   2 +-
 .../test/carp_data_stream_service_test.dart   |  26 +--
 .../test/carp_deployment_service_test.dart    |  84 ++++---
 .../test/carp_protocol_service_test.dart      |  18 +-
 .../test/carp_service_test.dart               | 213 +++++++++---------
 9 files changed, 176 insertions(+), 177 deletions(-)

diff --git a/backends/carp_webservices/CHANGELOG.md b/backends/carp_webservices/CHANGELOG.md
index 9486d61b..6f3c3b5a 100644
--- a/backends/carp_webservices/CHANGELOG.md
+++ b/backends/carp_webservices/CHANGELOG.md
@@ -1,6 +1,7 @@
-## 3.1.0
+## 3.2.0
 
 * upgrade of carp_serialization and carp_core
+* fix of issues [#392](https://github.com/cph-cachet/carp.sensing-flutter/issues/392) and [#369](https://github.com/cph-cachet/carp.sensing-flutter/issues/369).
 
 ## 3.0.1
 
diff --git a/backends/carp_webservices/example/pubspec.yaml b/backends/carp_webservices/example/pubspec.yaml
index 304dd822..941876cf 100644
--- a/backends/carp_webservices/example/pubspec.yaml
+++ b/backends/carp_webservices/example/pubspec.yaml
@@ -20,6 +20,8 @@ dependencies:
   carp_webservices:
     path: ../
 
+  oidc: ^0.5.2
+
 dev_dependencies:
 
 # The following section is specific to Flutter.
diff --git a/backends/carp_webservices/lib/carp_services/data_point_reference.dart b/backends/carp_webservices/lib/carp_services/data_point_reference.dart
index c4281fa8..38b44cab 100644
--- a/backends/carp_webservices/lib/carp_services/data_point_reference.dart
+++ b/backends/carp_webservices/lib/carp_services/data_point_reference.dart
@@ -273,7 +273,6 @@ class DataPointReference extends CarpReference {
     int httpStatusCode = response.statusCode;
 
     if (httpStatusCode == HttpStatus.ok) {
-      print('count response = ${response.body}');
       return int.tryParse(response.body) ?? 0;
     }
     // All other cases are treated as an error.
diff --git a/backends/carp_webservices/lib/carp_services/document_reference.dart b/backends/carp_webservices/lib/carp_services/document_reference.dart
index e6a6c9ee..086fc2ce 100644
--- a/backends/carp_webservices/lib/carp_services/document_reference.dart
+++ b/backends/carp_webservices/lib/carp_services/document_reference.dart
@@ -106,10 +106,6 @@ class DocumentReference extends CarpReference {
       return DocumentSnapshot._(path, responseJson);
     }
 
-    print('$httpStatusCode - ${response.reasonPhrase}');
-    print(responseJson["message"]);
-    print(responseJson["path"]);
-
     throw CarpServiceException(
       httpStatus: HTTPStatus(httpStatusCode, response.reasonPhrase),
       message: responseJson["message"].toString(),
diff --git a/backends/carp_webservices/pubspec.yaml b/backends/carp_webservices/pubspec.yaml
index 36a6c227..0f7666bf 100644
--- a/backends/carp_webservices/pubspec.yaml
+++ b/backends/carp_webservices/pubspec.yaml
@@ -1,6 +1,6 @@
 name: carp_webservices
 description: Flutter API for accessing the CARP web services - authentication, file management, data points, and app-specific collections of documents.
-version: 3.1.0
+version: 3.2.0
 homepage: https://github.com/cph-cachet/carp.sensing-flutter/tree/master/backends/carp_webservices
 
 environment:
diff --git a/backends/carp_webservices/test/carp_data_stream_service_test.dart b/backends/carp_webservices/test/carp_data_stream_service_test.dart
index 5bc11486..1e0d087d 100644
--- a/backends/carp_webservices/test/carp_data_stream_service_test.dart
+++ b/backends/carp_webservices/test/carp_data_stream_service_test.dart
@@ -115,18 +115,18 @@ void main() {
               triggerIds: {0}),
         ];
 
-        print(toJsonString(batch));
+        debugPrint(toJsonString(batch));
 
         await CarpDataStreamService()
             .appendToDataStreams(testDeploymentId, batch);
-        print('Done uploading.');
+        debugPrint('Done uploading.');
       },
     );
 
     test(
       '- get',
       () async {
-        print('Getting 100 ...');
+        debugPrint('Getting 100 ...');
         var list = await CarpDataStreamService().getDataStream(
           DataStreamId(
             studyDeploymentId: testDeploymentId,
@@ -136,8 +136,8 @@ void main() {
           0,
           100,
         );
-        print(toJsonString(list));
-        print('N = ${list.length}');
+        debugPrint(toJsonString(list));
+        debugPrint('N = ${list.length}');
       },
     );
 
@@ -183,18 +183,18 @@ void main() {
     test(
       '- upload & get - checking consistency (Issue #16)',
       () async {
-        print('Getting Geolocation measurements ...');
+        debugPrint('Getting Geolocation measurements ...');
         var list = await getGeoLocationBatches();
-        print('N = ${list.length}');
+        debugPrint('N = ${list.length}');
 
-        // print('Uploading another batch of Geolocation measurements...');
-        // await CarpDataStreamService()
-        //     .appendToDataStreams(testDeploymentId, geoLocationBatch);
+        debugPrint('Uploading another batch of Geolocation measurements...');
+        await CarpDataStreamService()
+            .appendToDataStreams(testDeploymentId, geoLocationBatch);
 
-        // var list2 = await getGeoLocationBatches();
-        // print('N = ${list2.length}');
+        var list2 = await getGeoLocationBatches();
+        debugPrint('N = ${list2.length}');
 
-        // expect(list2.length, list.length + 1);
+        expect(list2.length, list.length + 1);
       },
     );
   });
diff --git a/backends/carp_webservices/test/carp_deployment_service_test.dart b/backends/carp_webservices/test/carp_deployment_service_test.dart
index 6634ae94..3d913804 100644
--- a/backends/carp_webservices/test/carp_deployment_service_test.dart
+++ b/backends/carp_webservices/test/carp_deployment_service_test.dart
@@ -39,15 +39,15 @@ void main() {
 
   group("Base services", () {
     test('- authentication', () async {
-      print('CarpService : ${CarpService().app}');
-      print(" - signed in as: $user");
+      debugPrint('CarpService : ${CarpService().app}');
+      debugPrint(" - signed in as: $user");
 
-      print(CarpAuthService().manager?.discoveryDocument);
+      debugPrint('${CarpAuthService().manager?.discoveryDocument}');
     }, skip: false);
 
     test('- device ID', () async {
       String id = CarpDeploymentService().deployment().registeredDeviceId;
-      print('Registered Device ID : $id');
+      debugPrint('Registered Device ID : $id');
     }, skip: false);
   });
 
@@ -58,11 +58,9 @@ void main() {
         List<ActiveParticipationInvitation> invitations =
             await CarpParticipationService()
                 .getActiveParticipationInvitations();
-        for (var invitation in invitations) {
-          print(invitation);
-        }
+
         expect(invitations, isNotNull);
-        print(toJsonString(invitations));
+        debugPrint(toJsonString(invitations));
       },
       skip: false,
     );
@@ -74,7 +72,7 @@ void main() {
             CarpParticipationService().participation(testDeploymentId);
 
         ParticipantData data = await participation.getParticipantData();
-        print(toJsonString(data));
+        debugPrint(toJsonString(data));
       },
       skip: false,
     );
@@ -89,12 +87,12 @@ void main() {
           {SexInput.type: SexInput(value: Sex.Male)},
           'Participant',
         );
-        print(toJsonString(data));
+        debugPrint(toJsonString(data));
 
         // expect();
 
         // ParticipantData data = await participation.getParticipantData();
-        // print(toJsonString(data));
+        // debugPrint(toJsonString(data));
         // assert(data != null);
       },
       skip: false,
@@ -104,43 +102,43 @@ void main() {
   group("Deployment - using DeploymentReference", () {
     test('- get deployment status', () async {
       final status = await CarpDeploymentService().deployment().getStatus();
-      print(toJsonString(status));
+      debugPrint(toJsonString(status));
       expect(status.studyDeploymentId, testDeploymentId);
     });
 
     test('- register device', () async {
       final reference = CarpDeploymentService().deployment(testDeploymentId);
       var status = await reference.getStatus();
-      print(status);
+      debugPrint('$status');
 
       expect(status.primaryDeviceStatus!.device, isNotNull);
-      print(status.primaryDeviceStatus!.device);
+      debugPrint('${status.primaryDeviceStatus!.device}');
       var newStatus = await reference.registerPrimaryDevice();
-      print(newStatus);
+      debugPrint('$newStatus');
       expect(newStatus.studyDeploymentId, testDeploymentId);
     }, skip: false);
 
     test('- get primary device deployment', () async {
       final reference = CarpDeploymentService().deployment(testDeploymentId);
       final status = await reference.getStatus();
-      print(status);
+      debugPrint('$status');
       expect(status.primaryDeviceStatus!.device, isNotNull);
-      print(status.primaryDeviceStatus!.device);
+      debugPrint('${status.primaryDeviceStatus!.device}');
 
       PrimaryDeviceDeployment deployment = await reference.get();
-      print(toJsonString(deployment));
+      debugPrint(toJsonString(deployment));
       expect(deployment.registration.deviceId, isNotNull);
     }, skip: false);
 
     test('- deployment success', () async {
       final reference = CarpDeploymentService().deployment(testDeploymentId);
       final status_1 = await reference.getStatus();
-      print(toJsonString(status_1));
+      debugPrint(toJsonString(status_1));
 
       final deployment = await reference.get();
       final status_2 = await reference.deployed();
-      print(toJsonString(deployment));
-      print(toJsonString(status_2));
+      debugPrint(toJsonString(deployment));
+      debugPrint(toJsonString(status_2));
       expect(status_1.studyDeploymentId, status_2.studyDeploymentId);
       expect(status_2.studyDeploymentId, testDeploymentId);
     }, skip: false);
@@ -148,12 +146,12 @@ void main() {
     test('- unregister device', () async {
       final reference = CarpDeploymentService().deployment(testDeploymentId);
       var status = await reference.getStatus();
-      print(status);
+      debugPrint('$status');
       expect(status.primaryDeviceStatus!.device, isNotNull);
-      print(status.primaryDeviceStatus!.device);
+      debugPrint('${status.primaryDeviceStatus!.device}');
       status = await reference.unRegisterDevice(
           deviceRoleName: status.primaryDeviceStatus!.device.roleName);
-      print(status);
+      debugPrint('$status');
       expect(status.studyDeploymentId, testDeploymentId);
     }, skip: false);
   }, skip: true);
@@ -162,42 +160,42 @@ void main() {
     test('- get deployment status', () async {
       StudyDeploymentStatus status = await CarpDeploymentService()
           .getStudyDeploymentStatus(testDeploymentId);
-      print(toJsonString(status.toJson()));
-      print(status);
-      print(status.primaryDeviceStatus!.device);
-      print(toJsonString(status));
+      debugPrint(toJsonString(status.toJson()));
+      debugPrint('$status');
+      debugPrint('{status.primaryDeviceStatus?.device}');
+      debugPrint(toJsonString(status));
       expect(status.studyDeploymentId, testDeploymentId);
     }, skip: false);
 
     test('- register device', () async {
       StudyDeploymentStatus status = await CarpDeploymentService()
           .getStudyDeploymentStatus(testDeploymentId);
-      print(status);
+      debugPrint('$status');
       expect(status.primaryDeviceStatus!.device, isNotNull);
-      print(status.primaryDeviceStatus!.device);
+      debugPrint('{$status.primaryDeviceStatus?.device}');
       status = await CarpDeploymentService().registerDevice(
           testDeploymentId,
           status.primaryDeviceStatus!.device.roleName,
           DefaultDeviceRegistration(deviceDisplayName: 'Samsung A10'));
-      print(status);
+      debugPrint('$status');
       expect(status.studyDeploymentId, testDeploymentId);
     }, skip: false);
 
     test('- get primary device deployment', () async {
       StudyDeploymentStatus status = await CarpDeploymentService()
           .getStudyDeploymentStatus(testDeploymentId);
-      print(status);
+      debugPrint('$status');
       expect(status.primaryDeviceStatus!.device, isNotNull);
-      print(status.primaryDeviceStatus!.device);
+      debugPrint('${status.primaryDeviceStatus!.device}');
       PrimaryDeviceDeployment deployment =
           await CarpDeploymentService().getDeviceDeploymentFor(
         testDeploymentId,
         status.primaryDeviceStatus!.device.roleName,
       );
-      print(deployment);
+      debugPrint('$deployment');
       for (var task in deployment.tasks) {
-        print(task);
-        task.measures?.forEach(print);
+        debugPrint('$task');
+        task.measures?.forEach((measure) => debugPrint('$measure'));
       }
       expect(deployment.registration.deviceId, isNotNull);
     }, skip: false);
@@ -205,15 +203,15 @@ void main() {
     test('- device deployed', () async {
       StudyDeploymentStatus status_1 = await CarpDeploymentService()
           .getStudyDeploymentStatus(testDeploymentId);
-      print(status_1);
+      debugPrint('$status_1');
       expect(status_1.primaryDeviceStatus!.device, isNotNull);
-      print(status_1.primaryDeviceStatus!.device);
+      debugPrint('${status_1.primaryDeviceStatus!.device}');
       PrimaryDeviceDeployment deployment =
           await CarpDeploymentService().getDeviceDeploymentFor(
         testDeploymentId,
         status_1.primaryDeviceStatus!.device.roleName,
       );
-      print(deployment);
+      debugPrint('$deployment');
 
       StudyDeploymentStatus status_2 =
           await CarpDeploymentService().deviceDeployed(
@@ -221,7 +219,7 @@ void main() {
         status_1.primaryDeviceStatus!.device.roleName,
         deployment.lastUpdatedOn,
       );
-      print(status_2);
+      debugPrint('$status_2');
       expect(status_1.studyDeploymentId, status_2.studyDeploymentId);
       expect(status_2.studyDeploymentId, testDeploymentId);
     });
@@ -230,12 +228,12 @@ void main() {
       DeploymentReference reference =
           CarpDeploymentService().deployment(testDeploymentId);
       StudyDeploymentStatus status = await reference.getStatus();
-      print(status);
+      debugPrint('$status');
       expect(status.primaryDeviceStatus!.device, isNotNull);
-      print(status.primaryDeviceStatus!.device);
+      debugPrint('${status.primaryDeviceStatus!.device}');
       status = await reference.unRegisterDevice(
           deviceRoleName: status.primaryDeviceStatus!.device.roleName);
-      print(status);
+      debugPrint('$status');
       expect(status.studyDeploymentId, testDeploymentId);
     }, skip: false);
   }, skip: true);
diff --git a/backends/carp_webservices/test/carp_protocol_service_test.dart b/backends/carp_webservices/test/carp_protocol_service_test.dart
index bb16b473..b92841c6 100644
--- a/backends/carp_webservices/test/carp_protocol_service_test.dart
+++ b/backends/carp_webservices/test/carp_protocol_service_test.dart
@@ -103,8 +103,8 @@ void main() {
 
   group("Base services", () {
     test('- authentication', () async {
-      print('CarpService : ${CarpService().app}');
-      print(" - signed in as: $user");
+      debugPrint('CarpService : ${CarpService().app}');
+      debugPrint(" - signed in as: $user");
     });
   });
 
@@ -113,7 +113,7 @@ void main() {
     test(
       '- define',
       () async {
-        print(toJsonString(protocol));
+        debugPrint(toJsonString(protocol));
       },
     );
 
@@ -139,17 +139,17 @@ void main() {
       '- getBy',
       () async {
         var p = await CarpProtocolService().getBy(testProtocolId);
-        print(toJsonString(p));
+        debugPrint(toJsonString(p));
       },
     );
 
     test(
       '- getAllFor',
       () async {
-        print('Getting protocols for owner id: $ownerId');
+        debugPrint('Getting protocols for owner id: $ownerId');
         List<StudyProtocol> protocols =
             await CarpProtocolService().getAllForOwner(ownerId!);
-        print(toJsonString(protocols));
+        debugPrint(toJsonString(protocols));
       },
     );
 
@@ -158,7 +158,7 @@ void main() {
       () async {
         List<ProtocolVersion> versions =
             await CarpProtocolService().getVersionHistoryFor(testProtocolId);
-        print(toJsonString(versions));
+        debugPrint(toJsonString(versions));
       },
     );
 
@@ -176,7 +176,7 @@ void main() {
             )
           ],
         );
-        print(toJsonString(p));
+        debugPrint(toJsonString(p));
       },
     );
 
@@ -192,7 +192,7 @@ void main() {
           '{"version":1}',
         );
 
-        print(toJsonString(protocol));
+        debugPrint(toJsonString(protocol));
       },
     );
   });
diff --git a/backends/carp_webservices/test/carp_service_test.dart b/backends/carp_webservices/test/carp_service_test.dart
index 7303e05d..6cf8ca89 100644
--- a/backends/carp_webservices/test/carp_service_test.dart
+++ b/backends/carp_webservices/test/carp_service_test.dart
@@ -4,6 +4,7 @@ import 'dart:io';
 import 'package:carp_mobile_sensing/carp_mobile_sensing.dart';
 import 'package:carp_webservices/carp_auth/carp_auth.dart';
 import 'package:carp_webservices/carp_services/carp_services.dart';
+import 'package:flutter/foundation.dart';
 import 'package:test/test.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 
@@ -61,8 +62,8 @@ void main() {
           expect(user.token, isNotNull);
           expect(user.isAuthenticated, true);
 
-          print("signed in : $user");
-          print("token  : ${user.token}");
+          debugPrint("signed in : $user");
+          debugPrint("token  : ${user.token}");
         });
 
         setUp(() async {
@@ -79,8 +80,8 @@ void main() {
 
           CarpUser newUser = CarpAuthService().currentUser;
 
-          print("signed in : $newUser");
-          print("   name   : ${newUser.firstName} ${newUser.lastName}");
+          debugPrint("signed in : $newUser");
+          debugPrint("   name   : ${newUser.firstName} ${newUser.lastName}");
 
           expect(newUser.firstName, isNotEmpty);
           expect(newUser.lastName, isNotEmpty);
@@ -88,7 +89,7 @@ void main() {
         });
 
         test('- oauth token refreshes', () async {
-          print('expiring token...');
+          debugPrint('expiring token...');
           CarpAuthService().currentUser.token!.expire();
 
           CarpAuthService().currentUser;
@@ -106,8 +107,8 @@ void main() {
           assert(newUser.isAuthenticated);
           assert(newUser.username == user.username);
 
-          print("signed in : $newUser");
-          print("   token  : ${newUser.token}");
+          debugPrint("signed in : $newUser");
+          debugPrint("   token  : ${newUser.token}");
         });
       });
 
@@ -116,29 +117,29 @@ void main() {
           ConsentDocument uploaded = await CarpService().createConsentDocument(
               {"text": "The original terms text.", "signature": "Image Blob"});
 
-          print(uploaded);
-          print('id        : ${uploaded.id}');
-          print('createdAt : ${uploaded.createdAt}');
-          print('createdBy : ${uploaded.createdBy}');
-          print('document  : ${uploaded.document}');
+          debugPrint('$uploaded');
+          debugPrint('id        : ${uploaded.id}');
+          debugPrint('createdAt : ${uploaded.createdAt}');
+          debugPrint('createdBy : ${uploaded.createdBy}');
+          debugPrint('document  : ${uploaded.document}');
         });
 
         test('- get', () async {
           // ConsentDocument uploaded = await CarpService().createConsentDocument(
           //     {"text": "The original terms text.", "signature": "Image Blob"});
 
-          // print(uploaded);
+          // debugPrint(uploaded);
           // expect(uploaded.id, isNotNull);
 
           ConsentDocument downloaded =
               await CarpService().getConsentDocument(1);
           // await CarpService().getConsentDocument(uploaded.id);
 
-          print(downloaded);
-          print('id        : ${downloaded.id}');
-          print('createdAt : ${downloaded.createdAt}');
-          print('createdBy : ${downloaded.createdBy}');
-          print('document  : ${downloaded.document}');
+          debugPrint('$downloaded');
+          debugPrint('id        : ${downloaded.id}');
+          debugPrint('createdAt : ${downloaded.createdAt}');
+          debugPrint('createdBy : ${downloaded.createdBy}');
+          debugPrint('document  : ${downloaded.document}');
         });
       });
 
@@ -151,13 +152,13 @@ void main() {
             data.carpHeader.studyId = testStudyId;
             data.carpHeader.userId = userId;
 
-            print(_encode(data.toJson()));
+            debugPrint(_encode(data.toJson()));
 
             int dataPointId =
                 await CarpService().getDataPointReference().post(data);
 
             assert(dataPointId > 0);
-            print("data_point_id : $dataPointId");
+            debugPrint("data_point_id : $dataPointId");
           });
 
           test('- post w/o trigger id & device role name', () async {
@@ -172,18 +173,18 @@ void main() {
             data.carpHeader.startTime = null;
             data.carpHeader.endTime = null;
 
-            print(_encode(data.toJson()));
+            debugPrint(_encode(data.toJson()));
 
             int dataPointId =
                 await CarpService().getDataPointReference().post(data);
 
             assert(dataPointId > 0);
-            print("data_point_id : $dataPointId");
+            debugPrint("data_point_id : $dataPointId");
           });
 
           test('- batch', () async {
             final before = await CarpService().getDataPointReference().getAll();
-            print('N_before = ${before.length}');
+            debugPrint('N_before = ${before.length}');
 
             List<DataPoint> batch = [];
             batch.addAll([
@@ -204,8 +205,8 @@ void main() {
             await Future.delayed(const Duration(seconds: 5), () {});
 
             final after = await CarpService().getDataPointReference().getAll();
-            print('N_after = ${after.length}');
-            // data.forEach((datapoint) => print(_encode((datapoint.toJson()))));
+            debugPrint('N_after = ${after.length}');
+            // data.forEach((datapoint) => debugPrint(_encode((datapoint.toJson()))));
 
             assert(after.length > before.length);
           });
@@ -218,13 +219,13 @@ void main() {
             await Future.delayed(const Duration(seconds: 2), () {});
 
             String query = 'carp_header.data_format.namespace==test';
-            print("query : $query");
+            debugPrint("query : $query");
 
             List<DataPoint> data =
                 await CarpService().getDataPointReference().query(query);
 
-            print('N=${data.length}');
-            // data.forEach((datapoint) => print(_encode((datapoint.toJson()))));
+            debugPrint('N=${data.length}');
+            // data.forEach((datapoint) => debugPrint(_encode((datapoint.toJson()))));
 
             assert(data.length >= 140);
           });
@@ -234,36 +235,36 @@ void main() {
             // String query =
             //     'carp_header.data_format.name==${lightData.format.name}';
 
-            print("query : $query");
+            debugPrint("query : $query");
             List<DataPoint> data =
                 await CarpService().getDataPointReference().query(query);
 
-            print('N=${data.length}');
-            // data.forEach((datapoint) => print(_encode((datapoint.toJson()))));
+            debugPrint('N=${data.length}');
+            // data.forEach((datapoint) => debugPrint(_encode((datapoint.toJson()))));
 
             expect(data, isNotNull);
           });
 
           test('- count data points based on query', () async {
             String query = 'carp_header.data_format.namespace==test';
-            print("query : $query");
+            debugPrint("query : $query");
             int count =
                 await CarpService().getDataPointReference().count(query);
 
-            print('N=$count');
+            debugPrint('N=$count');
             expect(count, greaterThanOrEqualTo(0));
           });
 
           test('- delete test data points', () async {
             String query = 'carp_header.data_format.namespace==test';
-            print("query : $query");
+            debugPrint("query : $query");
             List<DataPoint> data =
                 await CarpService().getDataPointReference().query(query);
 
-            print('N=${data.length}');
-            print('deleting...');
+            debugPrint('N=${data.length}');
+            debugPrint('deleting...');
             for (var datapoint in data) {
-              print(' ${datapoint.id}');
+              debugPrint(' ${datapoint.id}');
               await CarpService().getDataPointReference().delete(datapoint.id!);
             }
           });
@@ -274,7 +275,7 @@ void main() {
             dataPost.carpHeader.studyId = studyId;
             dataPost.carpHeader.userId = userId;
 
-            print(_encode(dataPost.toJson()));
+            debugPrint(_encode(dataPost.toJson()));
 
             int dataPointId =
                 await CarpService().getDataPointReference().post(dataPost);
@@ -284,7 +285,7 @@ void main() {
             DataPoint dataGet =
                 await CarpService().getDataPointReference().get(dataPointId);
 
-            print(_encode(dataGet.toJson()));
+            debugPrint(_encode(dataGet.toJson()));
             assert(dataGet.id == dataPointId);
           });
 
@@ -294,9 +295,10 @@ void main() {
               List<DataPoint> data =
                   await CarpService().getDataPointReference().getAll();
 
-              data.forEach((datapoint) => print(_encode((datapoint.toJson()))));
+              data.forEach(
+                  (datapoint) => debugPrint(_encode((datapoint.toJson()))));
               expect(data, isNotNull);
-              print('N=${data.length}');
+              debugPrint('N=${data.length}');
             },
             skip: false,
           );
@@ -321,19 +323,19 @@ void main() {
             // String query = 'carp_header.user_id==$userId';
             //String query = 'carp_body.timestamp>2019-11-02T12:53:40.219598Z';
             //String query = 'carp_header.data_format.namespace=in=(carp,omh)';
-            print("query : $query");
+            debugPrint("query : $query");
             List<DataPoint> data =
                 await CarpService().getDataPointReference().query(query);
 
             expect(data, isNotNull);
-            print('N=${data.length}');
+            debugPrint('N=${data.length}');
             String str = '[';
             for (var datapoint in data) {
               str += '${datapoint.id},';
             }
-            // data.forEach((datapoint) => print(_encode((datapoint.toJson()))));
+            // data.forEach((datapoint) => debugPrint(_encode((datapoint.toJson()))));
             str += ']';
-            print(str);
+            debugPrint(str);
           });
 
           test('- delete', () async {
@@ -342,7 +344,7 @@ void main() {
                 .post(DataPoint.fromData(lightData)
                   ..carpHeader.studyId = studyId
                   ..carpHeader.userId = userId);
-            print("DELETE data_point_id : $dataPointId");
+            debugPrint("DELETE data_point_id : $dataPointId");
             await CarpService().getDataPointReference().delete(dataPointId);
           });
 
@@ -352,10 +354,10 @@ void main() {
               List<DataPoint> data =
                   await CarpService().getDataPointReference().getAll();
 
-              print('N=${data.length}');
-              print('deleting...');
+              debugPrint('N=${data.length}');
+              debugPrint('deleting...');
               for (var datapoint in data) {
-                print(' ${datapoint.id}');
+                debugPrint(' ${datapoint.id}');
                 await CarpService()
                     .getDataPointReference()
                     .delete(datapoint.id!);
@@ -367,7 +369,7 @@ void main() {
               List<DataPoint> empty =
                   await CarpService().getDataPointReference().getAll();
 
-              print('N=${empty.length}');
+              debugPrint('N=${empty.length}');
               assert(empty.isEmpty);
             },
             skip: true,
@@ -408,16 +410,16 @@ void main() {
 
           // get it back from the server
           final original = await reference.get();
-          print(_encode(original?.data));
+          debugPrint(_encode(original?.data));
 
           // updating the role to super user
           final updated = await reference
               .updateData({'email': userId, 'role': 'Super User'});
 
-          print('----------- updated -------------');
-          print(updated);
-          print(_encode(updated.data));
-          print(updated.data["role"]);
+          debugPrint('----------- updated -------------');
+          debugPrint('$updated');
+          debugPrint(_encode(updated.data));
+          debugPrint('${updated.data["role"]}');
           expect(updated.id, greaterThan(0));
           expect(updated.data["role"], 'Super User');
 
@@ -435,13 +437,13 @@ void main() {
               .document(userId)
               .setData({'email': userId, 'role': 'Administrator'});
 
-          print(document);
+          debugPrint('$document');
           expect(document, isNotNull);
 
           // then get it back by the id
           var newDocument = await CarpService().documentById(document.id).get();
 
-          print((newDocument));
+          debugPrint('$newDocument');
           expect(newDocument, isNotNull);
           expect(newDocument?.id, document.id);
 
@@ -465,7 +467,7 @@ void main() {
               .document(document.name)
               .get();
 
-          print((newDocument));
+          debugPrint('$newDocument');
           expect(newDocument?.id, document.id);
 
           // delete document again
@@ -487,35 +489,35 @@ void main() {
 //     test(' - rename document', () async {
 //       assert(document != null);
 
-//       print('----------- local document -------------');
-//       print(document);
-//       print(_encode(document.data));
+//       debugPrint('----------- local document -------------');
+//       debugPrint(document);
+//       debugPrint(_encode(document.data));
 
-//       print('----------- renamed document -------------');
+//       debugPrint('----------- renamed document -------------');
 //       DocumentSnapshot renamedDocument = await CarpService()
 //           .collection(collectionName)
 //           .document(document.name)
 //           .rename('new_name');
-//       print(renamedDocument);
-//       print(_encode(renamedDocument.data));
+//       debugPrint(renamedDocument);
+//       debugPrint(_encode(renamedDocument.data));
 
 //       // get the document back from the server
 // //      DocumentSnapshot server_document =
 // //          await CarpService().collection(collectionName).document(renamed_document.name).get();
 
-//       print('----------- server document by ID -------------');
+//       debugPrint('----------- server document by ID -------------');
 //       DocumentSnapshot serverDocument =
 //           await CarpService().documentById(documentId).get();
-//       print(serverDocument);
-//       print(_encode(serverDocument.data));
+//       debugPrint(serverDocument);
+//       debugPrint(_encode(serverDocument.data));
 
-//       print('----------- server document by NAME -------------');
+//       debugPrint('----------- server document by NAME -------------');
 //       serverDocument = await CarpService()
 //           .collection(collectionName)
 //           .document(renamedDocument.name)
 //           .get();
-//       print(serverDocument);
-//       print(_encode(serverDocument.data));
+//       debugPrint(serverDocument);
+//       debugPrint(_encode(serverDocument.data));
 
 //       assert(serverDocument.id > 0);
 //       assert(serverDocument.name == renamedDocument.name);
@@ -532,7 +534,7 @@ void main() {
               .document('cooking')
               .setData({'what': 'breakfast', 'time': 'morning'});
 
-          print(doc1);
+          debugPrint('$doc1');
           expect(doc1.id, greaterThan(0));
           expect(
               doc1.path, equals('$collectionName/$userId/activities/cooking'));
@@ -557,17 +559,17 @@ void main() {
         });
 
         test('- expire token and the upload document', () async {
-          print('expiring token...');
+          debugPrint('expiring token...');
           CarpAuthService().currentUser.token!.expire();
 
-          print('trying to upload a document w/o a name...');
+          debugPrint('trying to upload a document w/o a name...');
           DocumentSnapshot d = await CarpService()
               .collection(collectionName)
               .document()
               .setData({'email': username, 'name': 'Administrator'});
 
           expect(d.id, greaterThan(0));
-          print(d);
+          debugPrint('$d');
         });
 
         test(" - get a collection from path name", () async {
@@ -585,9 +587,9 @@ void main() {
           List<DocumentSnapshot> documents =
               await CarpService().collection(collectionName).documents;
 
-          print('N = ${documents.length}');
+          debugPrint('N = ${documents.length}');
           for (var doc in documents) {
-            print(doc);
+            debugPrint('$doc');
           }
           expect(documents.length, greaterThan(0));
         });
@@ -597,16 +599,16 @@ void main() {
               .collection(collectionName)
               .document(userId)
               .get();
-          newDocument?.collections.forEach((element) => print(element));
+          newDocument?.collections.forEach((element) => debugPrint(element));
         });
 
         test(" - list all nested documents in a collection", () async {
           List<DocumentSnapshot> documents =
               await CarpService().collection(collectionName).documents;
           for (var doc in documents) {
-            print(doc);
+            debugPrint('$doc');
             for (var col in doc.collections) {
-              print(col);
+              debugPrint(col);
             }
           }
         });
@@ -614,18 +616,18 @@ void main() {
 //    test(" - list all collections in the root", () async {
 //      List<String> root = await CarpService().collection("").collections;
 //      for (String ref in root) {
-//        print(ref);
+//        debugPrint(ref);
 //        // List all documents in each collection
 //        List<DocumentSnapshot> documents =
 //            await CarpService().collection("/$ref").documents;
 //        for (DocumentSnapshot doc in documents) {
-//          print(doc);
+//          debugPrint(doc);
 //        }
 //      }
 //
 //      documents = await CarpService().collection(collectionName).documents;
 //      for (DocumentSnapshot doc in documents) {
-//        print(doc);
+//        debugPrint(doc);
 //      }
 //    });
 
@@ -633,7 +635,7 @@ void main() {
           CollectionReference collection =
               await CarpService().collection(collectionName).get();
           expect(collection.id!, greaterThan(0));
-          print(collection);
+          debugPrint('$collection');
         });
 
         test(' - delete document', () async {
@@ -666,9 +668,10 @@ void main() {
           List<DocumentSnapshot> documents =
               await CarpService().documentsByQuery(query);
 
-          print("Found ${documents.length} document(s) for user '$userId'");
+          debugPrint(
+              "Found ${documents.length} document(s) for user '$userId'");
           for (var document in documents) {
-            print(' - $document');
+            debugPrint(' - $document');
           }
 
           expect(documents.length, greaterThan(0));
@@ -677,9 +680,9 @@ void main() {
         test(' - get all documents', () async {
           List<DocumentSnapshot> documents = await CarpService().documents();
 
-          print('Found ${documents.length} document(s)');
+          debugPrint('Found ${documents.length} document(s)');
           for (var document in documents) {
-            print(' - $document');
+            debugPrint(' - $document');
           }
           expect(documents.length, greaterThan(0));
         });
@@ -687,13 +690,13 @@ void main() {
         test(' - rename collection', () async {
           CollectionReference collection =
               await CarpService().collection(collectionName).get();
-          print('Collection before rename: $collection');
+          debugPrint('Collection before rename: $collection');
           await collection.rename(newCollectionName);
           expect(collection.name, newCollectionName);
-          print('Collection after rename: $collection');
+          debugPrint('Collection after rename: $collection');
           collection = await CarpService().collection(newCollectionName).get();
           expect(collection.name, newCollectionName);
-          print('Collection after get: $collection');
+          debugPrint('Collection after get: $collection');
         });
 
         test(' - delete collection', () async {
@@ -702,13 +705,13 @@ void main() {
 
           await collection.delete();
           expect(collection.id, -1);
-          print(collection);
+          debugPrint('$collection');
 
           try {
             collection =
                 await CarpService().collection(newCollectionName).get();
           } catch (error) {
-            print(error);
+            debugPrint('$error');
             expect((error as CarpServiceException).httpStatus!.httpResponseCode,
                 HttpStatus.notFound);
           }
@@ -731,9 +734,9 @@ void main() {
           final response = await uploadTask.onComplete;
           expect(response.id, greaterThan(0));
 
-          print('response.storageName : ${response.storageName}');
-          print('response.studyId : ${response.studyId}');
-          print('response.createdAt : ${response.createdAt}');
+          debugPrint('response.storageName : ${response.storageName}');
+          debugPrint('response.studyId : ${response.studyId}');
+          debugPrint('response.createdAt : ${response.createdAt}');
         });
 
         test('- get', () async {
@@ -753,9 +756,9 @@ void main() {
 
           final CarpFileResponse result =
               await CarpService().getFileStorageReference(id).get();
-          print(result);
+          debugPrint('$result');
           expect(result.id, id);
-          print('result : $result');
+          debugPrint('result : $result');
         });
 
         test('- download', () async {
@@ -780,7 +783,7 @@ void main() {
 
           int downResponse = await downloadTask.onComplete;
           expect(downResponse, 200);
-          print('status code : $downResponse');
+          debugPrint('status code : $downResponse');
         });
 
         // NOTE that the following "get non-existing, "get all", "query",
@@ -792,7 +795,7 @@ void main() {
           try {
             await CarpService().getFileStorageReference(876872).get();
           } catch (error) {
-            print(error);
+            debugPrint('$error');
             expect(error, isA<CarpServiceException>());
             expect((error as CarpServiceException).httpStatus!.httpResponseCode,
                 HttpStatus.notFound);
@@ -801,7 +804,7 @@ void main() {
         test('- get all', () async {
           final List<CarpFileResponse> results =
               await CarpService().getAllFiles();
-          print('result : $results');
+          debugPrint('result : $results');
         });
 
         test('- query', () async {
@@ -811,7 +814,7 @@ void main() {
           if (results.isNotEmpty) {
             expect(results[0].originalName, 'img.jpg');
           }
-          print('result : $results');
+          debugPrint('result : $results');
         });
 
         test('- get by name', () async {
@@ -821,9 +824,9 @@ void main() {
           if (reference != null) {
             final CarpFileResponse result = await reference.get();
             expect(result.originalName, 'img.jpg');
-            print('result : $result');
+            debugPrint('result : $result');
           } else {
-            print('File not found.');
+            debugPrint('File not found.');
           }
         });
 
@@ -838,9 +841,9 @@ void main() {
                 .getFileStorageReference(reference.id)
                 .delete();
             expect(result, greaterThan(0));
-            print('result : $result');
+            debugPrint('result : $result');
           } else {
-            print('File not found.');
+            debugPrint('File not found.');
           }
         });
       }, skip: false);