解析节点.js中的查询字符串

您可以在请求回调中使用 URL 模块中的 parse 方法。

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);

我建议您阅读HTTP模块文档，以了解您在createServer回调中得到的内容。您还应该查看像 http://howtonode.org/这样的网站，并查看Express框架以更快地开始使用Node。

还有 QueryString 模块的parse()方法：

var http = require('http'),
    queryString = require('querystring');
http.createServer(function (oRequest, oResponse) {
    var oQueryParams;
    // get query params as object
    if (oRequest.url.indexOf('?') >= 0) {
        oQueryParams = queryString.parse(oRequest.url.replace(/^.*'?/, ''));
        // do stuff
        console.log(oQueryParams);
    }
    oResponse.writeHead(200, {'Content-Type': 'text/plain'});
    oResponse.end('Hello world.');
}).listen(1337, '127.0.0.1');

从 Node.js 11 开始，遗留 URL API 的 url.parse 和其他方法被弃用(起初仅在文档中(，取而代之的是标准化的 WHATWG URL API。新 API 不提供将查询字符串解析为对象的功能。这可以使用querystring.parse方法来实现：

// Load modules to create an http server, parse a URL and parse a URL query.
const http = require('http');
const { URL } = require('url');
const { parse: parseQuery } = require('querystring');
// Provide the origin for relative URLs sent to Node.js requests.
const serverOrigin = 'http://localhost:8000';
// Configure our HTTP server to respond to all requests with a greeting.
const server = http.createServer((request, response) => {
  // Parse the request URL. Relative URLs require an origin explicitly.
  const url = new URL(request.url, serverOrigin);
  // Parse the URL query. The leading '?' has to be removed before this.
  const query = parseQuery(url.search.substr(1));
  response.writeHead(200, { 'Content-Type': 'text/plain' });
  response.end(`Hello, ${query.name}!'n`);
});
// Listen on port 8000, IP defaults to 127.0.0.1.
server.listen(8000);
// Print a friendly message on the terminal.
console.log(`Server running at ${serverOrigin}/`);

如果运行上面的脚本，则可以像这样测试服务器响应，例如：

curl -q http://localhost:8000/status?name=ryan
Hello, ryan!

require('url').parse('/status?name=ryan', {parseQueryString: true}).query

返回

{ name: 'ryan' }

参考： https://nodejs.org/api/url.html#url_urlobject_query

node -v v9.10.1

如果尝试直接控制台日志查询对象，则会收到错误TypeError: Cannot convert object to primitive value

所以我建议使用JSON.stringify

const http = require('http');
const url = require('url');
const server = http.createServer((req, res) => {
    const parsedUrl = url.parse(req.url, true);
    const path = parsedUrl.pathname, query = parsedUrl.query;
    const method = req.method;
    res.end("hello world'n");
    console.log(`Request received on: ${path} + method: ${method} + query: 
    ${JSON.stringify(query)}`);
    console.log('query: ', query);
  });

  server.listen(3000, () => console.log("Server running at port 3000"));

所以这样做curl http://localhost:3000/foo'?fizz'=buzz会回来Request received on: /foo + method: GET + query: {"fizz":"buzz"}

另一种无需任何模块即可获取查询参数的方法：

// ...
var server = http.createServer(function (request, response) {
  const requestUrl = new URL(request.url, `http://${request.headers.host}`);
  // Note that searcParams is not a simple JS object.
  // So to get parameter value by its name one should use access methods:
  const nameValue = requestUrl.searchParams.get('name');
  response.writeHead(200, {"Content-Type": "text/plain"});    
  response.end("Hello World'n");
});
// ...

请参阅http。IncomingMessage.url 和 URLSearchParams 了解详细信息。