node.js 接收get请求

Get 请求的相关方法一定在http.ServerRequest下，ServerRequest有data、end、close3个事件，method、url、headers、trailers、httpVersion、connection6个属性，setEncoding、pause、resume3个方法。

url属性下有一段说明描述了怎么解析get请求：

request.url#

Request URL string. This contains only the URL that is present in the actual HTTP request. If the request is:

GET /status?name=ryan HTTP/1.1\r\n
Accept: text/plain\r\n
\r\n

Then request.url will be:

'/status?name=ryan'

If you would like to parse the URL into its parts, you can use require('url').parse(request.url). Example:

node> require('url').parse('/status?name=ryan')
{ href: '/status?name=ryan',
  search: '?name=ryan',
  query: 'name=ryan',
  pathname: '/status' }

If you would like to extract the params from the query string, you can use therequire('querystring').parse function, or pass true as the second argument to require('url').parse. Example:

node> require('url').parse('/status?name=ryan', true)
{ href: '/status?name=ryan',
  search: '?name=ryan',
  query: { name: 'ryan' },
  pathname: '/status' }

说明中提到了require('url')和require('querystring') 可以分别查看API的 URL和 Query Strings小节

按照说明试一下吧（node> 表示 在命令行里敲代码）

那就结合 hello world 写一个动态的hello world

var http = require('http');
var server = http.createServer();

server.on('request',function (req, res){
  res.writeHead(200, {'Content-Type': 'text/plain'});
  var name = require('url').parse(req.url,true).query.name
  res.end('Hello World ' + name);
});

server.listen(1337, "127.0.0.1");

console.log('Server running at http://127.0.0.1:1337/');

将以上代码保存到  example3.js文件中，在cmd中敲入node example3.js

在浏览器地址栏中敲入  http://127.0.0.1:1337/hello?name=myname

挺简单的，下一节讲复杂的post