use header for file metadata

frontend/src/fileReceiver.js

@@ -34,12 +34,11 @@ class FileReceiver extends EventEmitter {
           const blob = new Blob([this.response]);
           const fileReader = new FileReader();
           fileReader.onload = function() {
+            const meta = JSON.parse(xhr.getResponseHeader('X-File-Metadata'))
             resolve({
               data: this.result,
-              aad: xhr.getResponseHeader('Additional-Data'),
-              fname: xhr
-                .getResponseHeader('Content-Disposition')
-                .match(/=(.+)/)[1]
+              aad: meta.aad,
+              filename: meta.filename
             });
           };
 
@@ -78,7 +77,7 @@ class FileReceiver extends EventEmitter {
           fdata.data
         ),
         new Promise((resolve, reject) => {
-          resolve(fdata.fname);
+          resolve(fdata.filename);
         })
       ]);
     });

frontend/src/fileSender.js

@@ -75,9 +75,7 @@ class FileSender extends EventEmitter {
           const dataView = new DataView(encrypted);
           const blob = new Blob([dataView], { type: file.type });
           const fd = new FormData();
-          fd.append('fname', file.name);
           fd.append('data', blob, file.name);
-          fd.append('aad', arrayToHex(this.aad));
 
           const xhr = new XMLHttpRequest();
 
@@ -102,6 +100,7 @@ class FileSender extends EventEmitter {
           };
 
           xhr.open('post', '/upload/' + fileId, true);
+          xhr.setRequestHeader('X-File-Metadata', JSON.stringify({ aad: arrayToHex(this.aad), iv: fileId, filename: file.name }))
           xhr.send(fd);
         });
       })

server/portal_server.js

@@ -78,17 +78,15 @@ app.get('/assets/download/:id', (req, res) => {
     return;
   }
 
-  Promise.all([
-    storage.filename(id),
-    storage.aad(id)])
-    .then(([reply, aad]) => {
+  storage.metadata(id)
+    .then(meta => {
       storage.length(id).then(contentLength => {
 
         res.writeHead(200, {
-          'Content-Disposition': 'attachment; filename=' + reply,
+          'Content-Disposition': 'attachment; filename=' + meta.filename,
           'Content-Type': 'application/octet-stream',
           'Content-Length': contentLength,
-          'Additional-Data': aad
+          'X-File-Metadata': JSON.stringify(meta)
         });
         const file_stream = storage.get(id);
 
@@ -143,20 +141,20 @@ app.post('/upload/:id', (req, res, next) => {
     res.sendStatus(404);
     return;
   }
-
+  const meta = JSON.parse(req.header('X-File-Metadata'));
+  log.info('meta', meta)
   req.pipe(req.busboy);
 
-  req.busboy.on('field', (fieldname, value) => {
-    storage.setField(req.params.id, fieldname, value);
-  })
-
   req.busboy.on('file', (fieldname, file, filename) => {
     log.info('Uploading:', req.params.id);
 
+    storage.set(req.params.id, file, filename, meta).then(delete_token => {
       const protocol = conf.env === 'production' ? 'https' : req.protocol;
       const url = `${protocol}://${req.get('host')}/download/${req.params.id}/`;
-    storage.set(req.params.id, file, filename, url).then(linkAndID => {
-      res.json(linkAndID);
+      res.json({
+        url,
+        delete: delete_token
+      });
     });
   });
 

server/storage.js

@@ -31,7 +31,8 @@ if (conf.s3_bucket) {
     setField: setField,
     delete: awsDelete,
     forceDelete: awsForceDelete,
-    ping: awsPing
+    ping: awsPing,
+    metadata
   };
 } else {
   module.exports = {
@@ -44,10 +45,23 @@ if (conf.s3_bucket) {
     setField: setField,
     delete: localDelete,
     forceDelete: localForceDelete,
-    ping: localPing
+    ping: localPing,
+    metadata
   };
 }
 
+function metadata(id) {
+  return new Promise((resolve, reject) => {
+    redis_client.hgetall(id, (err, reply) => {
+      if (!err) {
+        resolve(reply);
+      } else {
+        reject(err);
+      }
+    })
+  })
+}
+
 function filename(id) {
   return new Promise((resolve, reject) => {
     redis_client.hget(id, 'filename', (err, reply) => {
@@ -102,20 +116,16 @@ function localGet(id) {
   return fs.createReadStream(path.join(__dirname, '../static', id));
 }
 
-function localSet(id, file, filename, url) {
+function localSet(id, file, filename, meta) {
   return new Promise((resolve, reject) => {
     const fstream = fs.createWriteStream(path.join(__dirname, '../static', id));
     file.pipe(fstream);
     fstream.on('close', () => {
-      const uuid = crypto.randomBytes(10).toString('hex');
-
-      redis_client.hmset([id, 'filename', filename, 'delete', uuid]);
+      meta.delete = crypto.randomBytes(10).toString('hex');
+      redis_client.hmset(id, meta);
       redis_client.expire(id, 86400000);
       log.info('localSet:', 'Upload Finished of ' + id);
-      resolve({
-        uuid: uuid,
-        url: url
-      });
+      resolve(meta.delete);
     });
 
     fstream.on('error', () => {
@@ -183,7 +193,7 @@ function awsGet(id) {
   }
 }
 
-function awsSet(id, file, filename, url) {
+function awsSet(id, file, filename, meta) {
   const params = {
     Bucket: conf.s3_bucket,
     Key: id,
@@ -196,16 +206,13 @@ function awsSet(id, file, filename, url) {
         log.info('awsUploadError:', err.stack); // an error occurred
         reject();
       } else {
-        const uuid = crypto.randomBytes(10).toString('hex');
+        meta.delete = crypto.randomBytes(10).toString('hex');
 
-        redis_client.hmset([id, 'filename', filename, 'delete', uuid]);
+        redis_client.hmset(id, meta);
 
         redis_client.expire(id, 86400000);
         log.info('awsUploadFinish', 'Upload Finished of ' + filename);
-        resolve({
-          uuid: uuid,
-          url: url
-        });
+        resolve(meta.delete);
       }
     });
   });