78 lines
2.6 KiB
JavaScript
78 lines
2.6 KiB
JavaScript
/* This is an example of async streaming of large files.
|
|
* Try navigating to the adderss with Chrome and see the video
|
|
* in real time. */
|
|
|
|
const uWS = require('../dist/uws.js');
|
|
const fs = require('fs');
|
|
|
|
const port = 9001;
|
|
const fileName = '/home/alexhultman/Downloads/Sintel.2010.720p.mkv';
|
|
const totalSize = fs.statSync(fileName).size;
|
|
|
|
console.log('Video size is: ' + totalSize + ' bytes');
|
|
|
|
/* Helper function converting Node.js buffer to ArrayBuffer */
|
|
function toArrayBuffer(buffer) {
|
|
return buffer.buffer.slice(buffer.byteOffset, buffer.byteOffset + buffer.byteLength);
|
|
}
|
|
|
|
/* Helper function to pipe the ReadaleStream over an Http responses */
|
|
function pipeStreamOverResponse(res, readStream, totalSize) {
|
|
/* Careful! If Node.js would emit error before the first res.tryEnd, res will hang and never time out */
|
|
/* For this demo, I skipped checking for Node.js errors, you are free to PR fixes to this example */
|
|
readStream.on('data', (chunk) => {
|
|
/* We only take standard V8 units of data */
|
|
const ab = toArrayBuffer(chunk);
|
|
|
|
/* Stream as far as we can */
|
|
let lastOffset = res.getWriteOffset();
|
|
if (!res.tryEnd(ab, totalSize)) {
|
|
/* If we could not send this chunk, pause */
|
|
readStream.pause();
|
|
|
|
/* Save unsent chunk for when we can send it */
|
|
res.ab = ab;
|
|
res.abOffset = lastOffset;
|
|
|
|
/* Register async handlers for drainage */
|
|
res.onWritable((offset) => {
|
|
if (res.tryEnd(res.ab.slice(offset - res.abOffset), totalSize)) {
|
|
readStream.resume();
|
|
return true;
|
|
}
|
|
return false;
|
|
});
|
|
|
|
/* Register async abortion handlers */
|
|
res.onAborted(() => {
|
|
console.log('Res is no longer valid!');
|
|
readStream.destroy();
|
|
});
|
|
}
|
|
}).on('end', () => {
|
|
/* Todo: handle errors of the stream, probably good to simply close the response */
|
|
});
|
|
}
|
|
|
|
/* Yes, you can easily swap to SSL streaming by uncommenting here */
|
|
const app = uWS.SSLApp({
|
|
key_file_name: '/home/alexhultman/key.pem',
|
|
cert_file_name: '/home/alexhultman/cert.pem',
|
|
passphrase: '1234'
|
|
}).get('/sintel.mkv', (res, req) => {
|
|
/* Log */
|
|
console.log("Streaming Sintel video...");
|
|
/* Create read stream with Node.js and start streaming over Http */
|
|
const readStream = fs.createReadStream(fileName);
|
|
pipeStreamOverResponse(res, readStream, totalSize);
|
|
}).get('/*', (res, req) => {
|
|
/* Make sure to always handle every route */
|
|
res.end('Nothing to see here!');
|
|
}).listen(port, (token) => {
|
|
if (token) {
|
|
console.log('Listening to port ' + port);
|
|
} else {
|
|
console.log('Failed to listen to port ' + port);
|
|
}
|
|
});
|