如何使用套接字发送大文件? [英] How to send large file using sockets?
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问题描述
我有一个zip文件(15 mb),要将其发送到android套接字连接,我可以通过以下代码发出:
i have a zip file (15 mb), want to send this to android socket connection, i can able to emit via the following code :
fs.readFile('path',function(err,fileData){
io.to(socketId).emit('sendFile',{'file':fileData.toString('base64')});
});
使用上面的代码,如果有大尺寸文件的发射被延迟,则低尺寸文件的发射没有任何延迟.如何更好地实现这一目标.
using the above code, low size file is emitting without any delay, if there is any large size file emitting is delayed. how to achieve this in a better way.
推荐答案
您可以像下面的示例一样尝试使用socket.io-stream:
You can try to use socket.io-stream like in the below example:
服务器:
'use strict';
const io = require('socket.io')(3000);
const ss = require('socket.io-stream');
const fs = require('fs');
var filename = 'test.zip'; // 80MB file
io.on('connection', function (socket) {
console.log('client connected');
socket.on('sendmeafile', function () {
var stream = ss.createStream();
stream.on('end', function () {
console.log('file sent');
});
ss(socket).emit('sending', stream);
fs.createReadStream(filename).pipe(stream);
});
});
console.log('Plain socket.io server started at port 3000');
客户端:
'use strict';
const socket = require('socket.io-client')('http://localhost:3000');
const ss = require('socket.io-stream');
const fs = require('fs');
var filename = 'test-copy.zip';
socket.on('connect', function () {
console.log('connected');
socket.emit('sendmeafile');
});
ss(socket).on('sending', function(stream) {
stream.pipe(fs.createWriteStream(filename));
stream.on('end', function () {
console.log('file received');
});
});
正如jfriend00在他的评论中写道,您不需要http.
As jfriend00 wrote in his comment you don't need http.
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