NodeJS提取网址参数
querystringify模块
querystring,将url请求地址后的参数转化为对象,也可以把对象转化为url后的参数,便利对url的操作,npm install querystring -D,“querystring”已弃用。
代码案例
const querystring = require("querystring");
let url = "/get?id=123456&name=%E5%BC%A0%E4%B8%89";
console.log("uri", url.split('?')[0]);
let param = url.split('?')[1];
let obj = querystring.parse(param);
console.log("obj", obj);
console.log("obj.id=", obj.id, "obj.name=", obj.name);
let obj2 = {
id: 345678,
name: "张三",
hobby: ["play", "com1", "com2"]
};
var o2s = querystring.stringify(obj2);
console.log("o2s", o2s);
querystringify模块
querystringify模块,qs.parse()和qs.stringify(),npm install querystringify –save,地址:https://github.com/unshiftio/querystringify。
代码案例
const qs = require('querystringify');
let r11 = qs.parse('?foo=bar');
console.log(r11); // { foo: 'bar' }
let r12 = qs.parse('#foo=bar');
console.log(r12); // { foo: 'bar' }
let r13 = qs.parse('foo=bar');
console.log(r13); // { foo: 'bar' }
let r14 = qs.parse('foo=bar&bar=foo');
console.log(r14); // { foo: 'bar', bar: 'foo' }
let r15 = qs.parse('foo&bar=foo');
console.log(r15); // { foo: '', bar: 'foo' }
let r21 = qs.stringify({ foo: 'bar' });
console.log(r21); // foo=bar
let r22 = qs.stringify({ foo: 'bar' }, true);
console.log(r22); // ?foo=bar
let r23 = qs.stringify({ foo: 'bar' }, '#');
console.log(r23); // #foo=bar
let r24 = qs.stringify({ foo: '' }, '&');
console.log(r24); // &foo=
url模块
将url解析成对象,parse方法原型:url.parse(urlStr[, parseQueryString][, slashesDenoteHost]),可传递3个参数,1、urlStr:要解析成对象的url字符串;2、parseQueryString:是否解析查询参数,默认为false;3、slashesDenoteHost:是否以斜线解析主机名,默认为false。
代码案例
const url = require('url')
let urlParam = new URL("/foo?name=%E5%BC%A0%E4%B8%89", "//localhost:3000");
console.log("urlParam =", urlParam);
console.log("name =", urlParam.searchParams.get("name"))
接收请求参数
接收参数,代码案例
const http = require("http");
const url = require("url");
// 创建Server
const httpServer = http.createServer((req, res) => {
const method = req.method;
const uri = req.url.split('?')[0];
console.log("uri", uri);
if (uri == '/get1') {
// Get请求
let data = url.parse(req.url, true).query;
res.setHeader('Content-Type', 'html/text;charset=utf-8');
console.log("get1 data", data);
// get1 data [Object: null prototype] { id: '123456', name: '张三' }
res.end("data.id=" + data.id + ",data.name=" + data.name);
} else if (uri == '/post1') {
// POST请求
let data = url.parse(req.url, true).query;
res.setHeader('Content-Type', 'html/text;charset=utf-8');
console.log("post1 data", data);
// post1 data [Object: null prototype] { id: '123456', name: '李四' }
res.end("data.id=" + data.id + ",data.name=" + data.name);
} else if (uri == '/post2') {
// POST请求(JSON)
let postData = "";
// 数据块接收中
req.on("data", function (postDataChunk) {
postData += postDataChunk;
});
// 接收完毕
req.on("end", function () {
let jsonObject = JSON.parse(postData);
console.log("postData=", postData);
res.setHeader('Content-Type', 'html/text;charset=utf-8');
console.log("jsonObject.id=", jsonObject.id);
console.log("jsonObject.name=", jsonObject.name);
res.end("jsonObject.id=" + jsonObject.id + ",jsonObject.name=" + jsonObject.name);
});
}
});
httpServer.listen(3000, function () {
console.log("http server port:", 3000);
});
模拟实现路由,代码案例
server.js
const http = require("http");
var url = require("url");
var router = require("./module/router.js");
// 创建Server
const httpServer = http.createServer((request, response) => {
if (request.url !== '/favicon.ico') {
let pathname = url.parse(request.url).pathname;
console.log("pathname.", pathname);
pathname = pathname.replace(/\//, '');
console.log("pathname..", pathname);
router[pathname](request, response);
}
});
// 监听
httpServer.listen(3000, function () {
console.log("http server port:", 3000);
});
module\router.js
module.exports = {
// //127.0.0.1:3000/demo1
demo1: function (req, res) {
res.end("demo1");
},
// //127.0.0.1:3000/demo2
demo2: function (req, res) {
res.end("demo2");
}
}