Remove dependency express-fileupload

server/libs/expressFileupload/tempFileHandler.js

@@ -0,0 +1,64 @@
+const fs = require('fs');
+const path = require('path');
+const crypto = require('crypto');
+const {
+  debugLog,
+  checkAndMakeDir,
+  getTempFilename,
+  deleteFile
+} = require('./utilities');
+
+module.exports = (options, fieldname, filename) => {
+  const dir = path.normalize(options.tempFileDir);
+  const tempFilePath = path.join(dir, getTempFilename());
+  checkAndMakeDir({ createParentPath: true }, tempFilePath);
+
+  debugLog(options, `Temporary file path is ${tempFilePath}`);
+ 
+  const hash = crypto.createHash('md5');
+  let fileSize = 0;
+  let completed = false;
+
+  debugLog(options, `Opening write stream for ${fieldname}->${filename}...`);
+  const writeStream = fs.createWriteStream(tempFilePath);
+  const writePromise = new Promise((resolve, reject) => {
+    writeStream.on('finish', () => resolve());
+    writeStream.on('error', (err) => {
+      debugLog(options, `Error write temp file: ${err}`);
+      reject(err);
+    });
+  });
+
+  return {
+    dataHandler: (data) => {
+      if (completed === true) {
+        debugLog(options, `Error: got ${fieldname}->${filename} data chunk for completed upload!`);
+        return;
+      }
+      writeStream.write(data);
+      hash.update(data);
+      fileSize += data.length;
+      debugLog(options, `Uploading ${fieldname}->${filename}, bytes:${fileSize}...`);
+    },
+    getFilePath: () => tempFilePath,
+    getFileSize: () => fileSize,
+    getHash: () => hash.digest('hex'),
+    complete: () => {
+      completed = true;
+      debugLog(options, `Upload ${fieldname}->${filename} completed, bytes:${fileSize}.`);
+      if (writeStream !== false) writeStream.end();
+      // Return empty buff since data was uploaded into a temp file.
+      return Buffer.concat([]);
+    },
+    cleanup: () => {
+      completed = true;
+      debugLog(options, `Cleaning up temporary file ${tempFilePath}...`);
+      writeStream.end();
+      deleteFile(tempFilePath, err => (err 
+        ? debugLog(options, `Cleaning up temporary file ${tempFilePath} failed: ${err}`)
+        : debugLog(options, `Cleaning up temporary file ${tempFilePath} done.`)
+      ));
+    },
+    getWritePromise: () => writePromise
+  };
+};