nodejs的套接字挂断错误 [英] socket hang up error with nodejs

问题描述

我想为一些我不是管理员的 XYZ 服务器设置代理.然后我想对请求和响应标头进行一些分析，然后还要对请求和响应主体进行分析.所以我使用 http-proxy https://github.com/nodejitsu/node-http-proxy

I want to set up proxy for some XYZ server whose i am not the admin. Then i want to do some analysis over the request and response headers then also over request and response bodies. So i am using http-proxy https://github.com/nodejitsu/node-http-proxy

这就是我正在做的:

  var proxy = httpProxy.createProxyServer();


  connect.createServer(
    connect.bodyParser(),
    require('connect-restreamer')(),
    function (req, res) {
      proxy.web(req, res, { target : 'XYZserver' });
    }
  ).listen(config.listenPort);

直到 GET 请求一切都很好，但是每当发出具有某些正文(如 POST、PATCH、PUT 等请求)的请求时，我都会收到错误消息:

Upto GET request everything is fine but whenever a request with some body like POST, PATCH, PUT etc request are made i get the error :

Error: socket hang up
    at createHangUpError (http.js:1472:15)
    at Socket.socketCloseListener (http.js:1522:23)
    at Socket.EventEmitter.emit (events.js:95:17)
    at TCP.close (net.js:466:12)

我用谷歌搜索了很多，但不知道发生了什么问题.我使用 'proxy.web' 的 'ws:true' 选项启用了套接字代理，但仍然出现相同的错误.

I google a lot but found no clue whats wrong going on. I enable socket proxy with 'ws:true' option of 'proxy.web' but still the same error.

推荐答案

我遇到了类似的问题，并通过将我的代理代码移至其他节点中间件之上解决了该问题.

I had a similar issue and resolved it by moving my proxy code above other node middleware.

例如这:

var httpProxy = require('http-proxy');
var apiProxy = httpProxy.createProxyServer();
app.use("/someroute", function(req, res) {
    apiProxy.web(req, res, { target: 'http://someurl.com'})
});

app.use(someMiddleware);

不是这个:

app.use(someMiddleware);

var httpProxy = require('http-proxy');
var proxy = httpProxy.createProxyServer();
app.use("/someroute", function(req, res) {
    proxy.web(req, res, { target: 'http://someurl.com'})
});

我的具体问题是代理上方有 BodyParser 中间件.我没有做太多挖掘，但它一定以某种方式修改了请求，从而在请求最终到达时破坏了代理库.

My specific issue was having BodyParser middleware above the proxy. I haven't done much digging but it must have modified the request in some way that broke the proxy library when the request finally came to it.

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