Added Context Controller (#35)

src/main/java/eu/europa/ec/dgc/verifier/restapi/controller/ContextController.java

@@ -0,0 +1,70 @@
+/*-
+ * ---license-start
+ * eu-digital-green-certificates / dgca-verifier-service
+ * ---
+ * Copyright (C) 2021 T-Systems International GmbH and all other contributors
+ * ---
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ---license-end
+ */
+
+package eu.europa.ec.dgc.verifier.restapi.controller;
+
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.media.Content;
+import io.swagger.v3.oas.annotations.media.Schema;
+import io.swagger.v3.oas.annotations.responses.ApiResponse;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import lombok.extern.slf4j.Slf4j;
+import org.apache.commons.io.IOUtils;
+import org.springframework.core.io.ClassPathResource;
+import org.springframework.core.io.Resource;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/context")
+@Slf4j
+public class ContextController {
+
+    /**
+     * Http Method for getting the current context.
+     */
+    @GetMapping(produces = MediaType.APPLICATION_JSON_VALUE)
+    @Operation(
+        summary = "Provide configuration information for the verifier app",
+        tags = {"Configuration"},
+        responses = {
+            @ApiResponse(
+                responseCode = "200",
+                description = "Returns the current context for the verifier app.",
+                content = @Content(
+                    mediaType = MediaType.APPLICATION_JSON_VALUE,
+                    schema = @Schema(implementation = String.class)))
+        }
+    )
+    public ResponseEntity<String> getContext() {
+        Resource resource = new ClassPathResource("/static/context.jsonc");
+        try {
+            return  ResponseEntity.ok(IOUtils.toString(resource.getInputStream(), StandardCharsets.UTF_8));
+        } catch (IOException e) {
+            log.error("Could not read context file");
+        }
+        return ResponseEntity.ok("");
+    }
+
+}

src/main/resources/static/context.jsonc

@@ -0,0 +1,38 @@
+{
+  // Origin in ISO alpha 2 code:
+  "origin": "DE",
+  "versions": {
+    "default": {
+      // catch-all for normal versions
+      "privacyUrl": "https://publications.europa.eu/en/web/about-us/legal-notices/eu-mobile-apps",
+      "context": {
+        // Currently this url is empty still, subject to change:
+        "url": "https://dgca-verifier-service.cfapps.eu10.hana.ondemand.com/context",
+        "pubKeys": [
+          "lKdU1EbQubxyDDm2q3N8KclZ2C94Num3xXjG0pk+3eI=",
+          "r/mIkG3eEpVdm+u/ko/cwxzOMo1bk4TyHIlByibiA5E="
+        ]
+      },
+      "endpoints": {
+        "status": {
+          "url": "https://dgca-verifier-service.cfapps.eu10.hana.ondemand.com/signercertificateStatus",
+          "pubKeys": [
+            "lKdU1EbQubxyDDm2q3N8KclZ2C94Num3xXjG0pk+3eI=",
+            "r/mIkG3eEpVdm+u/ko/cwxzOMo1bk4TyHIlByibiA5E="
+          ]
+        },
+        "update": {
+          "url": "https://dgca-verifier-service.cfapps.eu10.hana.ondemand.com/signercertificateUpdate",
+          "pubKeys": [
+            "lKdU1EbQubxyDDm2q3N8KclZ2C94Num3xXjG0pk+3eI=",
+            "r/mIkG3eEpVdm+u/ko/cwxzOMo1bk4TyHIlByibiA5E="
+          ]
+        }
+      }
+    },
+    "0.1.0": {
+      // Example for a version that is insecure and shouldn't start.
+      "outdated": true
+    }
+  }
+}