Question

我在这里使用socket.io-p2p尝试发送图像文件。由于它是p2p，我认为该文件没有上传到服务器，而是直接发送给连接的对等体。我设法用我的代码传输一个文件，但我很不确定这是否真的是一个p2p传输，因为在我看来，该文件首先上传到我的服务器，然后发送到另一个对等而不是实际的p2p两个设备之间的连接。无论我是在标签之间还是在不同网络上的两个不同设备之间发送文件，我都会在DU Meter中看到上传和下载的高峰。我知道信号部分是在我的服务器上完成的，但如果这是真正的p2p应该是关于它的。当然，我可能是错的，所以我要求进行评估。你们觉得怎么样？

server.js

var app = require("express")();
var express = require("express");
var server = require("http").Server(app);
var p2pserver = require("socket.io-p2p-server").Server;
var io = require("socket.io")(server);
var ss = require("socket.io-stream");
var path = require("path");

app.use(express.static(__dirname));
io.use(p2pserver);

var peerNum = 0;

io.on("connection", function(socket) {

  console.log("Peer " + peerNum + " connected");
  io.emit("peer-num", peerNum);
  peerNum++;

  ss(socket).on("file", function(stream, data) {

    var filename = path.basename(data.name);

    var parts = [];

    stream.on("data", function(data) {
      parts.push(data);
    });

    stream.on("end", function() {
      socket.broadcast.emit("file", parts);
    });

  });
});

server.listen(80,'someServer', function () {
  console.log("Listening on 80")
});

client.js

// this file is meant to be browserified
var P2P = require("socket.io-p2p");
var io = require("socket.io-client");
var ss = require("socket.io-stream");
var socket = io();
var opts = {autoUpgrade: true, peerOpts: {numClients: 10}};
var p2p = new P2P(socket, opts);
var $ = require("jquery");

p2p.on("peer-num", function(num) {
  console.log("You are peer number " + num);
  $(".peerNum").html("You are connected to " + num + " peers.");
});

p2p.on("file", function(stream) {
  //console.log(stream);

  var img = document.createElement("img");
  img.src = (window.URL || window.webkitURL).createObjectURL(new Blob(stream));
  document.getElementById("receivedImages").appendChild(img);
});

$(function() {
  $("#file").change(function(e) {
    ss.forceBase64 = true;
    var file = e.target.files[0];
    var stream = ss.createStream();

    ss(socket).emit("file", stream, {size: file.size,name:file.name});
    var blobStream = ss.createBlobReadStream(file);
    var size = 0;
    blobStream.on("data", function(chunk) {
      size += chunk.length;
      console.log(Math.floor(size / file.size * 100) + "%");
    });
    blobStream.pipe(stream);
  });
});

这真的是p2p吗？

0 个答案: