revisions

app/api.js

@@ -100,8 +100,30 @@ function asyncInitWebSocket(server) {
   });
 }
 
+function listenForResponse(ws, canceller) {
+  return new Promise((resolve, reject) => {
+    ws.addEventListener('message', function(msg) {
+      try {
+        const response = JSON.parse(msg.data);
+        if (response.error) {
+          throw new Error(response.error);
+        } else {
+          resolve({
+            url: response.url,
+            id: response.id,
+            ownerToken: response.owner
+          });
+        }
+      } catch (e) {
+        canceller.cancelled = true;
+        canceller.error = e;
+        reject(e);
+      }
+    });
+  });
+}
+
 async function upload(
-  ws,
   stream,
   streamInfo,
   metadata,
@@ -110,55 +132,51 @@ async function upload(
   onprogress,
   canceller
 ) {
-  const metadataHeader = arrayToB64(new Uint8Array(metadata));
-  const fileMeta = {
-    fileMetadata: metadataHeader,
-    authorization: `send-v1 ${verifierB64}`
-  };
+  const host = window.location.hostname;
+  const port = window.location.port;
+  const protocol = window.location.protocol === 'https:' ? 'wss:' : 'ws:';
+  const error = { cancelled: false };
+  const ws = await asyncInitWebSocket(`${protocol}//${host}:${port}/api/ws`);
 
-  function listenForResponse() {
-    return new Promise((resolve, reject) => {
-      ws.addEventListener('message', function(msg) {
-        const response = JSON.parse(msg.data);
-        if (response.error) {
-          reject(response.error);
-        } else {
-          resolve({
-            url: response.url,
-            id: response.id,
-            ownerToken: response.owner
-          });
-        }
-      });
-    });
-  }
+  try {
+    const metadataHeader = arrayToB64(new Uint8Array(metadata));
+    const fileMeta = {
+      fileMetadata: metadataHeader,
+      authorization: `send-v1 ${verifierB64}`
+    };
 
-  const resPromise = listenForResponse();
-  ws.send(JSON.stringify(fileMeta));
+    const responsePromise = listenForResponse(ws, error);
 
-  const reader = stream.getReader();
-  let state = await reader.read();
-  let size = 0;
-  while (!state.done) {
-    const buf = state.value;
-    if (canceller.cancelled) {
-      ws.close(4000, 'upload cancelled');
-      throw new Error(0);
+    ws.send(JSON.stringify(fileMeta));
+
+    const reader = stream.getReader();
+    let state = await reader.read();
+    let size = 0;
+    while (!state.done) {
+      const buf = state.value;
+      if (canceller.cancelled) {
+        throw new Error(0);
+      }
+      if (error.cancelled) {
+        throw new Error(error.error);
+      }
+      ws.send(buf);
+
+      onprogress([Math.min(streamInfo.fileSize, size), streamInfo.fileSize]);
+      size += streamInfo.recordSize;
+      state = await reader.read();
     }
-    ws.send(buf);
 
-    onprogress([Math.min(streamInfo.fileSize, size), streamInfo.fileSize]);
-    size += streamInfo.recordSize;
-    state = await reader.read();
+    const response = await responsePromise; //promise only fufills if response is good
+    ws.close();
+    return response;
+  } catch (e) {
+    ws.close(4000);
+    throw e;
   }
-
-  const response = await resPromise;
-
-  ws.close();
-  return response;
 }
 
-export async function uploadWs(
+export function uploadWs(
   encrypted,
   info,
   metadata,
@@ -166,10 +184,6 @@ export async function uploadWs(
   keychain,
   onprogress
 ) {
-  const host = window.location.hostname;
-  const port = window.location.port;
-  const protocol = window.location.protocol === 'https:' ? 'wss:' : 'ws:';
-  const ws = await asyncInitWebSocket(`${protocol}//${host}:${port}/api/ws`);
   const canceller = { cancelled: false };
 
   return {
@@ -177,7 +191,6 @@ export async function uploadWs(
       canceller.cancelled = true;
     },
     result: upload(
-      ws,
       encrypted,
       info,
       metadata,

app/ece.js

@@ -282,11 +282,11 @@ export default class ECE {
 
     this.streamInfo = {
       recordSize: rs,
-      fileSize: input.size + 16 * Math.floor(input.size / (rs - 17))
+      fileSize: 21 + input.size + 16 * Math.floor(input.size / (rs - 17))
     };
-    input = new BlobSliceStream(input, rs, mode);
+    const inputStream = new BlobSliceStream(input, rs, mode);
 
     const ts = new TransformStream(new ECETransformer(mode, key, rs, salt));
-    this.stream = input.pipeThrough(ts);
+    this.stream = inputStream.pipeThrough(ts);
   }
 }

app/fileReceiver.js

@@ -51,25 +51,18 @@ export default class FileReceiver extends Nanobus {
     this.state = 'ready';
   }
 
-  async streamToArrayBuffer(stream) {
+  async streamToArrayBuffer(stream, streamSize) {
     const reader = stream.getReader();
-    const chunks = [];
-    let length = 0;
+    const result = new Int8Array(streamSize);
+    let offset = 0;
 
     let state = await reader.read();
     while (!state.done) {
-      chunks.push(state.value);
-      length += state.value.length;
+      result.set(state.value, offset);
+      offset += state.value.length;
       state = await reader.read();
     }
 
-    const result = new Int8Array(length);
-    let offset = 0;
-    for (let i = 0; i < chunks.length; i++) {
-      result.set(chunks[i], offset);
-      offset += chunks[i].length;
-    }
-
     return result.buffer;
   }
 
@@ -93,8 +86,10 @@ export default class FileReceiver extends Nanobus {
 
       const dec = await this.keychain.decryptStream(ciphertext);
       const plainstream = dec.stream;
-
-      const plaintext = await this.streamToArrayBuffer(plainstream);
+      const plaintext = await this.streamToArrayBuffer(
+        plainstream,
+        dec.streamInfo.fileSize
+      );
 
       if (!noSave) {
         await saveFile({

app/fileSender.js

@@ -65,11 +65,11 @@ export default class FileSender extends Nanobus {
     this.msg = 'encryptingFile';
     this.emit('encrypting');
 
-    const enc = await this.keychain.encryptStream(this.file);
+    const enc = this.keychain.encryptStream(this.file);
     const metadata = await this.keychain.encryptMetadata(this.file);
     const authKeyB64 = await this.keychain.authKeyB64();
 
-    this.uploadRequest = await uploadWs(
+    this.uploadRequest = uploadWs(
       enc.stream,
       enc.streamInfo,
       metadata,

app/keychain.js

@@ -179,12 +179,12 @@ export default class Keychain {
     return ciphertext;
   }
 
-  async encryptStream(plaintext) {
+  encryptStream(plaintext) {
     const enc = new ECE(plaintext, this.rawSecret, 'encrypt');
     return enc;
   }
 
-  async decryptStream(encstream) {
+  decryptStream(encstream) {
     const dec = new ECE(encstream, this.rawSecret, 'decrypt');
     return dec;
   }