Node.js HTTP字符串

Question

Given a full HTTP message string, is there facilities in Node.js to parse this? Basically I'm not going to be using the http.createServer function. I already have the full HTTP message through other means (ZMQ), but I need to parse it, which means headers, query strings, post body.. etc.

Furthermore, the same functionality should be able to reverse the process, that is creating a fully formed HTTP response message string. That I can use and pass through different transport (ZMQ).

I know that PHP has Symfony's HTTP Foundation (which does what I'm asking). Is there something in Node.js that does a similar thing?

I found this: https://github.com/joyent/http-parser but it's in C++

Answer 1

You can use the http-parser from within node, but it's not very well documented. I extracted the following example from the tests :

var HTTPParser = process.binding('http_parser').HTTPParser,
    CRLF = '\r\n',
    request = new Buffer('POST /it HTTP/1.1' + CRLF +
      'Content-Type: application/x-www-form-urlencoded' + CRLF +
      'Content-Length: 15' + CRLF +
      CRLF +
      'foo=42&bar=1337'),
    parser = new HTTPParser(HTTPParser.REQUEST),
    headers = {},
    body = '';

parser.onHeadersComplete = function(info) {
    headers = info;
};

parser.onBody = function(b, start, len) {
    body = b.slice(start,  start + len).toString();
};

parser.onMessageComplete = function() {
    console.log('message complete');
    console.log('request method: ' + headers.method);
    console.log('request body:\n\n ' + body);
};

parser.execute(request, 0, request.length);

Gives the following output:

message complete
request method: POST
request body:

 foo=42&bar=1337