从node.js的http.IncomingMessage获取请求正文 [英] Get request body from node.js's http.IncomingMessage

问题描述

我正在尝试为用node.js编写的应用程序实现一个简单的HTTP端点.我已经创建了HTTP服务器，但是现在我不得不阅读请求内容正文:

I'm trying to implement a simple HTTP endpoint for an application written in node.js. I've created the HTTP server, but now I'm stuck on reading the request content body:

http.createServer(function(r, s) {
    console.log(r.method, r.url, r.headers);
    console.log(r.read());
    s.write("OK"); 
    s.end(); 
}).listen(42646);

请求的方法，URL和标头可以正确打印，但是r.read()始终为NULL.我可以说这对请求的发出方式没有问题，因为content-length标头在服务器端大于零.

Request's method, URL and headers are printed correctly, but r.read() is always NULL. I can say it's not a problem in how the request is made, because content-length header is greater than zero on server side.

文档说 r是实现可读流的http.IncomingMessage对象界面，为什么它不起作用?

Documentation says r is a http.IncomingMessage object that implements the Readable Stream interface, so why it's not working?

推荐答案

好的，我想我已经找到了解决方案. r流(就像node.js中的其他所有内容一样，我很愚蠢……)应该以异步事件驱动的方式读取:

Ok, I think I've found the solution. The r stream (like everything else in node.js, stupid me...) should be read in an async event-driven way:

http.createServer(function(r, s) {
    console.log(r.method, r.url, r.headers);
    var body = "";
    r.on('readable', function() {
        body += r.read();
    });
    r.on('end', function() {
        console.log(body);
        s.write("OK"); 
        s.end(); 
    });
}).listen(42646);

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