Socket.io-file-client is module for uploading file via Socket.io.
Socket.io-file 1.x used Binary String to send files. Binary String is little bit slower than direct Binary writes, and also server used fs.write, not writable stream. Recently, FileReader.readAsBinaryString() was deprecated, so I updated Socket.io-file to use ArrayBuffer(Object for manipulate Binary Data directly from JavaScript) instead of Binary String.
Also, newer version has much more functionalities, like Server-side MIME type checking, File size limitations. Even you can configure the size of each transmission(chunk) any value you want, higher value gives you faster upload.
- Simple is the best.
- File uploads
- Highly improved performance
- Using File Streams to write faster, efficient.
- Checking mime, limit file size
- Multiple file uploads
You can found full source code here: Example Page Or Browserify Example
<html>
<head>
<meta charset="UTF-8">
<title>Socket.io-file 2.x File Upload Example</title>
</head>
<body>
<h1>Socket.io-file 2.x File Upload Example</h1>
<p>Select file and click upload button to upload.</p>
<p>Multiple upload also supports.</p>
<form id="form">
<input type="file" id="file" multiple />
<input type="submit" value="Upload" />
</form>
<script src="socket.io.js"></script>
<script src="socket.io-file-client.js"></script>
<script src="app.js"></script>
</body>
</html>var socket = io('http://localhost:3000');
var uploader = new SocketIOFileClient(socket);
var form = document.getElementById('form');
uploader.on('start', function(fileInfo) {
console.log('Start uploading', fileInfo);
});
uploader.on('stream', function(fileInfo) {
console.log('Streaming... sent ' + fileInfo.sent + ' bytes.');
});
uploader.on('complete', function(fileInfo) {
console.log('Upload Complete', fileInfo);
});
uploader.on('error', function(err) {
console.log('Error!', err);
});
uploader.on('abort', function(fileInfo) {
console.log('Aborted: ', fileInfo);
});
form.onsubmit = function(ev) {
ev.preventDefault();
var fileEl = document.getElementById('file');
var uploadIds = uploader.upload(fileEl);
};Also Socket.io-file-client supports UMD, you can load from CommonJS require() or ES6 import:
import SocketIO from 'socket.io-client';
import SocketIOFileClient from 'socket.io-file-client';
var socket = SocketIO('http://localhost:3000');
var uploader = new SocketIOFileClient(socket);
var form = document.getElementById('form');
uploader.on('start', (fileInfo) => {
console.log('Start uploading', fileInfo);
});
uploader.on('stream', (fileInfo) => {
console.log('Streaming... sent ' + fileInfo.sent + ' bytes.');
});
uploader.on('complete', (fileInfo) => {
console.log('Upload Complete', fileInfo);
});
uploader.on('error', (err) => {
console.log('Error!', err);
});
uploader.on('abort', (fileInfo) => {
console.log('Aborted: ', fileInfo);
});
form.onsubmit = function(ev) {
ev.preventDefault();
var fileEl = document.getElementById('file');
var uploadIds = uploader.upload(fileEl);
};Create new SocketIOFileClient object.
Upload file(s). First argument must be or FileList object, other wise refuse uploads. If it has multiple files(with multiple attribute), it uploads all at once. Returns array that contains upload ids as values. Available options are:
- String to: If server has multiple upload directories, client must be set the directory where to upload.
Attach event handler to SocketIOFileClient. Possible events are described later part.
Detach event handler from SocketIOFileClient. If function is undefined, removes all event handlers attached on that event.
Trigger the event.
Abort upload of specified id.
Destroy all resources about SocketIOFileClient. Use this method for saving more resources from client side. After use this, you can't upload file anymore.
Get array of currently uploading files. Keys are upload id, values are object that contains information of uploading files.
SocketIOFile provides these events. Some of property is slight different than servers, like wrote -> sent.
Fired on ready to upload files. Everytime you create new SocketIOFileClient object, it receives some upload information from server like chunkSize, mimeType like other things. So if you send the file before sync those meta data, your upload won't work properly. Personally, I recommend create single SocketIOFileClient object first, and make upload after ready events fired.
Fired on starting file upload. This means server grant your uploading request and create empty file to begin writes. Argument has:
- String name: Name of the file
- Number size: Size of the file(bytes)
- String uploadTo: Directory that where to writing.
Fired on getting chunks from client. Argument has:
- String name
- String uploadTo
- Number size
- Number sent: Bytes of sent
Fired on upload complete. Argument has:
- String name
- String mime: MIME type that server recognized.
- Number size
- Number wrote
- Number estimated: Estimated uploading time as ms.
Fired on abort uploading.
- String name
- String uploadTo
- Number size
- Number sent
Fired on got an error. Passes Error object.
This module uses FileReader API with ArrayBuffer, so make sure your browser support it.