在Nodejs中读取原始http消息 [英] Read raw http message in Nodejs

问题描述

我正在使用http.request函数发送http请求，我想读取整个http响应，如文本;也就是原始http协议文本。可能吗？我写了下面的代码，但它没有用。

I'm sending an http request using the http.request function, and I would like to read the whole http response like text; that is, the raw http protocol text. Is it possible? I've written the below code but it's not working.

// Set up the request
console.log('Sending request');
var post_req = http.request(post_options, function(res) {
    res.setEncoding('utf8');
    console.log('Response statusCode: ' + res.statusCode);
//    res.on('data', function (chunk) {
//        console.log('Response: ' + chunk);
//    });
//    res.on('end', function() {});
});

post_req.on('socket', function (socket) {
    var response = "";
    socket.on('data', function(chunk){
    console.log(chunk);
    });
});

// post the data
post_req.write(post_data);
post_req.end();

推荐答案

如果你想访问原始的http消息，我建议使用网络模块，并自行编写请求。对于简单的GET请求，这样的事情是这样的：

If you want access to the raw http message, I'd suggest using the net module instead, and writing the request yourself. Something like this for a simple GET request:

var net = require('net');

var host = 'stackoverflow.com',
    port = 80,
    socket = net.connect(port, host, function() {

    var request = "GET / HTTP/1.1\r\nHost: " + host + "\r\n\r\n",
        rawResponse = "";

    // send http request:
    socket.end(request);

    // assume utf-8 encoding:
    socket.setEncoding('utf-8');

    // collect raw http message:
    socket.on('data', function(chunk) {
        rawResponse += chunk;
    });
    socket.on('end', function(){
        console.log(rawResponse);
    });


});

对于POST请求发送 application / x-www-form-urlencoded 数据，您可以使用以下内容编写请求：

For a POST request sending application/x-www-form-urlencoded data, you could write the request using something like:

function writePOSTRequest (data, host, path) {
    return "POST " + path + " HTTP/1.1\r\n" +
            "Host: " + host + "\r\n" +
            "Content-Type: application/x-www-form-urlencoded\r\n" +
            "Content-Length: " + Buffer.byteLength(data) + "\r\n\r\n" +
            data + "\r\n\r\n";

}

var data = "name1=value1&name2=value2",
    request = writePOSTRequest(data, host, "/path/to/resource");

我正在使用 Buffer.byteLength 因为 Content-Length 需要以字节为单位的长度，而不是字符。另外，请记住数据必须是URL编码。

where I'm using Buffer.byteLength because Content-Length requires the length in bytes, not in characters. Also, remember that data must be URL encoded.

如果你不太了解HTTP的格式消息，那么这是一个不错的起点：

If you don't know much about the format of HTTP messages, then this is a decent place to start:

http://jmarshall.com/easy/http/

另外，如果你不知道响应的编码是什么，那么你'我必须首先解析标题，但 UTF-8是目前最常见的所以这是一个非常安全的赌注。

Also, if you don't know what the encoding of the response will be then you'll have to parse the headers first to find out, but UTF-8 is by far the most common so it's a pretty safe bet.

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