feature/#392_Unpack_gz_files_and_#391follow_redirects

libs/extensions/std/exec/src/archive-interpreter-executor.ts

@@ -3,6 +3,7 @@
 // SPDX-License-Identifier: AGPL-3.0-only
 
 import { strict as assert } from 'assert';
+import * as zlib from 'node:zlib';
 import * as path from 'path';
 
 import * as R from '@jvalue/jayvee-execution';
@@ -45,20 +46,52 @@ export class ArchiveInterpreterExecutor extends AbstractBlockExecutor<
       'archiveType',
       PrimitiveValuetypes.Text,
     );
+    let fs: R.Result<R.FileSystem>;
+
     if (archiveType === 'zip') {
-      const fs = await this.loadZipFileToInMemoryFileSystem(
-        archiveFile,
-        context,
+      fs = await this.loadZipFileToInMemoryFileSystem(archiveFile, context);
+    } else if (archiveType === 'gz') {
+      fs = this.loadGzFileToInMemoryFileSystem(archiveFile, context);
+    } else {
+      return R.err({
+        message: `Archive type is not supported`,
+        diagnostic: { node: context.getCurrentNode(), property: 'name' },
+      });
+    }
+
+    if (R.isErr(fs)) {
+      return fs;
+    }
+    return R.ok(fs.right);
+  }
+
+  private loadGzFileToInMemoryFileSystem(
+    archiveFile: BinaryFile,
+    context: ExecutionContext,
+  ): R.Result<FileSystem> {
+    context.logger.logDebug(`Loading gz file from binary content`);
+    try {
+      const fs = new InMemoryFileSystem();
+      const archivedObject = zlib.gunzipSync(archiveFile.content);
+
+      const extNameArchive = path.extname(archiveFile.name);
+
+      const file = this.createFileFromArchive(
+        archiveFile.name,
+        archivedObject,
+        extNameArchive,
       );
-      if (R.isErr(fs)) {
-        return fs;
-      }
-      return R.ok(fs.right);
+
+      const addedFile = fs.putFile(
+        InMemoryFileSystem.getPathSeparator() + file.name,
+        file,
+      );
+      assert(addedFile != null);
+
+      return R.ok(fs);
+    } catch (error: unknown) {
+      return R.err(this.generateErrorObject(context, error));
     }
-    return R.err({
-      message: `Archive is not a zip-archive`,
-      diagnostic: { node: context.getCurrentNode(), property: 'name' },
-    });
   }
 
   private async loadZipFileToInMemoryFileSystem(
@@ -75,21 +108,9 @@ export class ArchiveInterpreterExecutor extends AbstractBlockExecutor<
       )) {
         if (!archivedObject.dir) {
           const content = await archivedObject.async('arraybuffer');
-          // Ext incl. leading dot
-          const extName = path.extname(archivedObject.name);
-          const fileName = path.basename(archivedObject.name);
-          const mimeType =
-            inferMimeTypeFromContentTypeString(extName) ||
-            MimeType.APPLICATION_OCTET_STREAM;
-          const fileExtension =
-            inferFileExtensionFromFileExtensionString(extName) ||
-            FileExtension.NONE;
-          const file = new BinaryFile(
-            fileName,
-            fileExtension,
-            mimeType,
-            content,
-          );
+
+          const file = this.createFileFromArchive(archivedObject.name, content);
+
           const addedFile = fs.putFile(
             InMemoryFileSystem.getPathSeparator() + relPath,
             file,
@@ -99,12 +120,33 @@ export class ArchiveInterpreterExecutor extends AbstractBlockExecutor<
       }
       return R.ok(fs);
     } catch (error: unknown) {
-      return R.err({
-        message: `Unexpected Error ${
-          error instanceof Error ? error.message : JSON.stringify(err)
-        } occured during processing`,
-        diagnostic: { node: context.getCurrentNode(), property: 'name' },
-      });
+      return R.err(this.generateErrorObject(context, error));
     }
   }
+
+  private createFileFromArchive(
+    archiveFileName: string,
+    content: ArrayBuffer,
+    extNameArchive?: string,
+  ) {
+    const fileName = path.basename(archiveFileName, extNameArchive);
+    const extName = path.extname(fileName);
+
+    const mimeType =
+      inferMimeTypeFromContentTypeString(extName) ||
+      MimeType.APPLICATION_OCTET_STREAM;
+    const fileExtension =
+      inferFileExtensionFromFileExtensionString(extName) || FileExtension.NONE;
+
+    return new BinaryFile(fileName, fileExtension, mimeType, content);
+  }
+
+  private generateErrorObject(context: ExecutionContext, error: unknown) {
+    return {
+      message: `Unexpected Error ${
+        error instanceof Error ? error.message : JSON.stringify(err)
+      } occured during processing`,
+      diagnostic: { node: context.getCurrentNode(), property: 'name' },
+    };
+  }
 }

libs/extensions/std/exec/src/http-extractor-executor.ts

@@ -3,8 +3,6 @@
 // SPDX-License-Identifier: AGPL-3.0-only
 
 import { strict as assert } from 'assert';
-import * as http from 'http';
-import * as https from 'https';
 import * as path from 'path';
 
 import * as R from '@jvalue/jayvee-execution';
@@ -20,6 +18,7 @@ import {
   implementsStatic,
 } from '@jvalue/jayvee-execution';
 import { IOType, PrimitiveValuetypes } from '@jvalue/jayvee-language-server';
+import { http, https } from 'follow-redirects';
 import { AstNode } from 'langium';
 
 import {
@@ -106,12 +105,16 @@ export class HttpExtractorExecutor extends AbstractBlockExecutor<
     context.logger.logDebug(`Fetching raw data from ${url}`);
     let httpGetFunction: HttpGetFunction;
     if (url.startsWith('https')) {
-      httpGetFunction = https.get;
+      httpGetFunction = https.get.bind(https);
     } else {
-      httpGetFunction = http.get;
+      httpGetFunction = http.get.bind(http);
     }
+    const followRedirects = context.getPropertyValue(
+      'followRedirects',
+      PrimitiveValuetypes.Boolean,
+    );
     return new Promise((resolve) => {
-      httpGetFunction(url, (response) => {
+      httpGetFunction(url, { followRedirects: followRedirects }, (response) => {
         const responseCode = response.statusCode;
 
         // Catch errors
@@ -124,6 +127,13 @@ export class HttpExtractorExecutor extends AbstractBlockExecutor<
               diagnostic: { node: context.getOrFailProperty('url') },
             }),
           );
+        } else if (responseCode >= 301 && responseCode < 400) {
+          resolve(
+            R.err({
+              message: `HTTP fetch was redirected with code ${responseCode}. Redirects are either disabled or maximum number of redirects was exeeded.`,
+              diagnostic: { node: context.getOrFailProperty('url') },
+            }),
+          );
         }
 
         // Get chunked data and store to ArrayBuffer
@@ -147,11 +157,7 @@ export class HttpExtractorExecutor extends AbstractBlockExecutor<
 
           // Infer FileName and FileExtension from url, if not inferrable, then default to None
           // Get last element of URL assuming this is a filename
-          const urlString = context.getPropertyValue(
-            'url',
-            PrimitiveValuetypes.Text,
-          );
-          const url = new URL(urlString);
+          const url = new URL(response.responseUrl);
           let fileName = url.pathname.split('/').pop();
           if (fileName === undefined) {
             fileName = url.pathname.replace('/', '-');

libs/extensions/std/lang/src/archive-interpreter-meta-inf.ts

@@ -19,7 +19,8 @@ export class ArchiveInterpreterMetaInformation extends BlockMetaInformation {
         archiveType: {
           type: PrimitiveValuetypes.Text,
           docs: {
-            description: 'The archive type to be interpreted, e.g., `"zip"`.',
+            description:
+              'The archive type to be interpreted, e.g., "zip" or "gz".',
           },
         },
       },

libs/extensions/std/lang/src/http-extractor-meta-inf.ts

@@ -147,6 +147,21 @@ export class HttpExtractorMetaInformation extends BlockMetaInformation {
             }
           },
         },
+        followRedirects: {
+          type: PrimitiveValuetypes.Boolean,
+          defaultValue: true,
+          docs: {
+            description:
+              'Indicates, whether to follow redirects on get requests. If `false`, redirects are not followed. Default `true`',
+            examples: [
+              {
+                code: 'url: "tinyurl.com/4ub9spwz" \n followRedirects: true',
+                description:
+                  'Specifies the URL to fetch the data from and allows redirects.',
+              },
+            ],
+          },
+        },
       },
 
       // Input type:

package.json

@@ -19,11 +19,13 @@
     "@docusaurus/preset-classic": "2.4.1",
     "@docusaurus/theme-mermaid": "2.4.1",
     "@mdx-js/react": "^1.6.22",
+    "@types/follow-redirects": "^1.14.1",
     "assert": "^2.0.0",
     "chalk": "^4.1.2",
     "clsx": "^1.2.1",
     "commander": "^8.0.0",
     "fast-csv": "^4.3.6",
+    "follow-redirects": "^1.15.2",
     "fp-ts": "^2.13.1",
     "gtfs-realtime-bindings": "^1.1.1",
     "jszip": "^3.10.1",
@@ -94,4 +96,4 @@
       "got": "^11.8.5"
     }
   }
-}
+}