javascript - 在 node.js 中解析查询字符串

Question

在这个“Hello World”示例中:

// 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 World\n");
});

// 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/");

如何从查询字符串中获取参数？

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

在文档中，他们提到:

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

但我不明白如何使用它。谁能解释一下？

Answer 1

您可以使用 URL module 中的 parse 方法在请求回调中。

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 World\n");
  }
});

// Listen on port 8000, IP defaults to 127.0.0.1
server.listen(8000);

我建议你阅读 HTTP module documentation了解您在 createServer 回调中得到了什么。您还应该看看 http://howtonode.org/ 等网站。并查看 Express framework更快地开始使用 Node。