Question

52

Parsing Query String in node.js

rated 0 times [ 59] [ 7] / answers: 1 / hits: 147894 / 13 Years ago, wed, december 21, 2011, 12:00:00

In this Hello World example:

// Load the http module to create an http server.

var http = require('http');



// Configure our HTTP server to respond with Hello World to all requests.

var server = http.createServer(function (request, response) {

  response.writeHead(200, {Content-Type: text/plain});

  response.end(Hello Worldn);

});



// Listen on port 8000, IP defaults to 127.0.0.1

server.listen(8000);



// Put a friendly message on the terminal

console.log(Server running at http://127.0.0.1:8000/);

How can I get the parameters from the query string?

http://127.0.0.1:8000/status?name=ryan

In the documentation, they mentioned:

node> require('url').parse('/status?name=ryan', true)

{ href: '/status?name=ryan'

, search: '?name=ryan'

, query: { name: 'ryan' }

, pathname: '/status'

}

But I did not understand how to use it. Could anyone explain?

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kinsley

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answered 13 Years ago lamarmaximiliand · Accepted Answer

You can use the parse method from the URL module in the request callback.

var http = require('http');

var url = require('url');



// Configure our HTTP server to respond with Hello World to all requests.

var server = http.createServer(function (request, response) {

  var queryData = url.parse(request.url, true).query;

  response.writeHead(200, {Content-Type: text/plain});



  if (queryData.name) {

    // user told us their name in the GET request, ex: http://host:8000/?name=Tom

    response.end('Hello ' + queryData.name + 'n');



  } else {

    response.end(Hello Worldn);

  }

});



// Listen on port 8000, IP defaults to 127.0.0.1

server.listen(8000);

I suggest you read the HTTP module documentation to get an idea of what you get in the createServer callback. You should also take a look at sites like http://howtonode.org/ and checkout the Express framework to get started with Node faster.