express的简单dome

const express = require("express");
const port = 8080;
const app = express();
/* 解析post参数 */
const body = require("body-parser");
const path = require("path");
const fs = require("fs");
/* 获取文件 */
const multer = require("multer");

app.all("*", function (req, res, next) {
    //设置允许跨域的域名，*代表允许任意域名跨域
    res.header("Access-Control-Allow-Origin", "*");
    //允许的header类型
    res.header("Access-Control-Allow-Headers", "content-type");
    //跨域允许的请求方式
    res.header("Access-Control-Allow-Methods", "DELETE,PUT,POST,GET,OPTIONS");
    if (req.method.toLowerCase() == ‘options‘) {
        res.send(200);  //让options尝试请求快速结束
    } else {
        next();
    }
});
/* 解析post参数 */
app.use(body.urlencoded({
    /* extended: false：表示使用系统模块querystring来处理，也是官方推荐的 */
    extended: false,
}));
/* 通过配置multer的dest属性， 将文件储存在项目下的tmp文件中 */
app.use(multer({dest: ‘../upload/‘}).any());


app.get("/api/userInfo", (req, res, next) => {
    console.log(req.query);
    res.send("get请求成功");
})

app.post("/api/userLogin", (req, res, next) => {
    console.log(req.body);
    res.send("post请求成功");
})

app.post("/api/filesUpload", (req, res, next) => {
    /*
    * req.files[0].path这是路径加文件明
    * path.parse(req.files[0].originalname).ext获取文件后缀名
    * */
    const filename = req.files[0].path + path.parse(req.files[0].originalname).ext
    console.log(req.files[0]);
    console.log(req.files[0].path);
    console.log(path.parse(req.files[0].originalname));
    console.log(path.parse(req.files[0].originalname).ext);
    console.log(filename);
    console.log(req.body);
    fs.rename(req.files[0].path, filename, function (err) {
        if (err) {
            res.send(err)
        } else {
            res.send("文件上传成功");
        }
    })
})

app.use("/view/", express.static("../static/"));

app.listen(port, () => {
    console.log(`Example app listening at http://localhost:${port}`)
})

原文：https://www.cnblogs.com/zhuangbowu/p/14602462.html