获取请求主体以进行后期操作

Question

I use the http module and I need to get the req.body currently I try with the following without success .

http.createServer(function (req, res) {

console.log(req.body);

this return undfiend ,any idea why? I send via postman some short text...

Answer 1

Here's a very simple without any framework (Not express way).

var http = require('http');
var querystring = require('querystring');

function processPost(request, response, callback) {
    var queryData = "";
    if(typeof callback !== 'function') return null;

    if(request.method == 'POST') {
        request.on('data', function(data) {
            queryData += data;
            if(queryData.length > 1e6) {
                queryData = "";
                response.writeHead(413, {'Content-Type': 'text/plain'}).end();
                request.connection.destroy();
            }
        });

        request.on('end', function() {
            request.post = querystring.parse(queryData);
            callback();
        });

    } else {
        response.writeHead(405, {'Content-Type': 'text/plain'});
        response.end();
    }
}

Usage example:

http.createServer(function(request, response) {
    if(request.method == 'POST') {
        processPost(request, response, function() {
            console.log(request.post);
            // Use request.post here

            response.writeHead(200, "OK", {'Content-Type': 'text/plain'});
            response.end();
        });
    } else {
        response.writeHead(200, "OK", {'Content-Type': 'text/plain'});
        response.end();
    }

}).listen(8000);

express framework

In Postman of the 3 options available for content type select "X-www-form-urlencoded".

app.use(bodyParser.urlencoded())

With:

app.use(bodyParser.urlencoded({
  extended: true
}));

See https://github.com/expressjs/body-parser

The 'body-parser' middleware only handles JSON and urlencoded data, not multipart

Answer 2

req.body is a Express feature, as far as I know... You can retrieve the request body like this with the HTTP module:

var http = require("http"),
server = http.createServer(function(req, res){
  var dataChunks = [],
      dataRaw,
      data;

  req.on("data", function(chunk){
    dataChunks.push(chunk);
  });

  req.on("end", function(){
    dataRaw = Buffer.concat(dataChunks);
    data = dataRaw.toString();

    // Here you can use `data`
    res.end(data);
  });
});

server.listen(80)