Node.js Express块 [英] Node.js Express block

问题描述

我的问题是，我计划使用Express缓存在一定时间范围内接收到的所有请求，直到我一次发送所有响应为止. 但不幸的是，直到我回复了第一个请求，我才能收到第二个请求.因此，我猜想node/express会以某种方式阻止其他请求的进一步处理.

My Problem is, that I'm planning to use express to cache all requests which I receiver for a certain amount of time until I send all responses at once. But unfortunately I can't receive a second request until I've responded to the first one. So I guess node / express is somehow blocking the further processing of other requests.

我为您构建了一个最小的工作示例，因此您可以更好地了解我在说什么.

I build a minimal working example for you, so you can see better what I'm talking about.

var express = require('express');
var app = express();

var ca = [];

app.get('/hello.txt', function(req, res){
  ca.push(res);
  console.log("Push");
});

setInterval(function(){
  while (ca.length) {
    var res = ca.shift();
    res.send('Hello World');
    console.log("Send");
  }
},9000);

var server = app.listen(3000, function() {
  console.log('Listening on port %d', server.address().port);
});

当我仅向localhost:3000发送一个请求并等待9秒时，我就可以发送第二个请求.但是，当我发送两个通知而不等待间隔的回调时，第二个将被阻塞，直到第一个间隔被触发为止.

When I'm sending just one request to localhost:3000 and wait for 9sec I'm able to send a second one. But when I send both without waiting for the callback of the interval, the second one is blocked until the first interval triggered.

长话短说:为什么会发生这种阻塞?有什么方法可以避免这种阻塞.

Long Story short: Why is this blocking happening and what ways are there to avoid this blocking.

PS:默认的http包似乎显示了另一种行为 http://blog.nemikor.com/2010/05/21/long-polling-in-nodejs/

PS: It seems that the default http package shows another behavior http://blog.nemikor.com/2010/05/21/long-polling-in-nodejs/

推荐答案

尝试使用Firefox和chrome来防止序列化请求...

try it with firefox and chrome to prevent serializing the requests...

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