CODEWITHSUNDEEP
node.js
Werner Germán Busch
Werner Germán Busch

Reputation: 359

"write after end" error in a server made with nodejs

Hello I am making this small local server that receives a POST request and returns the request with all upper cases. It also saves a local copy of the request for testing purposes. I don't think that line of code is the source of the problem, because I tried deleting it and the problem remains the same. The problem is that when I try to test it, it always crashes the server with an "error: write after end". Can anyone help why this is happening? Thanks!

var map = require('through2-map');
var http = require('http');
var fs = require('fs');

var server = http.createServer(function (req, res) {

    if (req.method !== 'POST') {
        return res.end('Please send POST\n');
    }
    else {
        req.pipe(fs.createWriteStream('post.txt'));
        req.pipe(map(function (currValue) {
            return currValue.toString().toUpperCase()
        })).pipe(res);
        res.end();
    }       
})

server.listen(8000);

This is the complete error:

events.js:160
      throw er; // Unhandled 'error' event
      ^

Error: write after end
    at ServerResponse.OutgoingMessage.write (_http_outgoing.js:441:15)
    at Through2.ondata (C:\Users\ger\Documents\Javascript\nodeJS\node_modules\readable-stream\lib\_stream_readable.js:619:20)
    at emitOne (events.js:96:13)
    at Through2.emit (events.js:188:7)
    at addChunk (C:\Users\ger\Documents\Javascript\nodeJS\node_modules\readable-stream\lib\_stream_readable.js:291:12)
    at readableAddChunk (C:\Users\ger\Documents\Javascript\nodeJS\node_modules\readable-stream\lib\_stream_readable.js:278:11)
    at Through2.Readable.push (C:\Users\ger\Documents\Javascript\nodeJS\node_modules\readable-stream\lib\_stream_readable.js:245:10)
    at Through2.Transform.push (C:\Users\ger\Documents\Javascript\nodeJS\node_modules\readable-stream\lib\_stream_transform.js:148:32)
    at Through2._transform (C:\Users\ger\Documents\Javascript\nodeJS\node_modules\through2-map\index.js:20:12)
    at Through2.Transform._read (C:\Users\ger\Documents\Javascript\nodeJS\node_modules\readable-stream\lib\_stream_transform.js:184:10)

Upvotes: 0

Views: 9497

Answers (1)

ralphtheninja
ralphtheninja

Reputation: 133008

You are ending the response before it has finished. Remove res.end().

Upvotes: 1

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