removed createInterceptDownload file and use existing code for http download

models/lib/fsHooks/createInterceptDownload.js

@@ -1,47 +0,0 @@
-import { createObjectId } from '../grid/createObjectId';
-
-export const createInterceptDownload =
-  function interceptDownload(filesCollection, bucket, file, http, versionName) {
-    const { gridFsFileId } = file.versions[versionName].meta || {};
-    if (gridFsFileId) {
-      // opens the download stream using a given gfs id
-      // see: http://mongodb.github.io/node-mongodb-native/3.2/api/GridFSBucket.html#openDownloadStream
-      const gfsId = createObjectId({ gridFsFileId });
-      const readStream = bucket.openDownloadStream(gfsId);
-
-      readStream.on('data', data => {
-        http.response.write(data);
-      });
-
-      readStream.on('end', () => {
-        http.response.end(); // don't pass parameters to end() or it will be attached to the file's binary stream
-      });
-
-      readStream.on('error', () => {
-        // not found probably
-        // eslint-disable-next-line no-param-reassign
-        http.response.statusCode = 404;
-        http.response.end('not found');
-      });
-
-      http.response.setHeader('Cache-Control', filesCollection.cacheControl);
-      http.response.setHeader(
-        'Content-Disposition',
-        getContentDisposition(file.name, http?.params?.query?.download),
-      );
-    }
-    return Boolean(gridFsFileId); // Serve file from either GridFS or FS if it wasn't uploaded yet
-  };
-
-/**
- * Will initiate download, if links are called with ?download="true" queryparam.
- **/
-const getContentDisposition = (name, downloadFlag) => {
-  const dispositionType = downloadFlag === 'true' ? 'attachment;' : 'inline;';
-
-  const encodedName = encodeURIComponent(name);
-  const dispositionName = `filename="${encodedName}"; filename=*UTF-8"${encodedName}";`;
-  const dispositionEncoding = 'charset=utf-8';
-
-  return `${dispositionType} ${dispositionName} ${dispositionEncoding}`;
-};