CODEWITHSUNDEEP
javascriptnode.js
user3773773
user3773773

Reputation: 11

How to export chunk in http.request in node.js

This http.request code is from http://nodejs.org/docs/v0.4.7/api/http.html#http.request. How to export chunk in res.on ?

  var options = {
  host: 'www.google.com',
  port: 80,
  path: '/upload',
  method: 'POST'
};

var req = http.request(options, function(res) {
  console.log('STATUS: ' + res.statusCode);
  console.log('HEADERS: ' + JSON.stringify(res.headers));
  res.setEncoding('utf8');
  res.on('data', function (chunk) {
    console.log('BODY: ' + chunk);
  });
});

// write data to request body
req.write('data\n');
req.write('data\n');
req.end();

Upvotes: 0

Views: 899

Answers (1)

shennan
shennan

Reputation: 11656

I'm not sure what you mean by "export" but perhaps you'd like to put the contents of the response into a local text file?

Here's how you might go about doing that:

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

var options = {
  host: 'www.google.com',
  port: 80,
  path: '/upload',
  method: 'POST'
};

var req = http.request(options, function(res) {
  res.setEncoding('utf8');
  res.on('data', function (chunk) {
    var response;
    if(fs.existsSync('response.html'))
      response = fs.readFileSync('response.html') + chunk;
    else
      response = chunk;
    fs.writeFileSync('response.html', response);
  });
});

// write data to request body
req.write('data\n');
req.write('data\n');
req.end();

Note that after each data event is fired, we're checking for an existing file with fs.existsSync, populating a response variable accordingly and then writing the response to a file again with fs.writeFileSync.

This wouldn't be much use on a server, as the synchronous nature of the file reads/writes would bottleneck your traffic, but it does highlight the general concept of responding to events and concatenating chunks.

Upvotes: 1

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