use()和get(), post()一样,也是中间件。不同之处在于use()中路径匹配方式。代码如下:
var express = require("express");
var app = express();
app.use("/admin",function(req,res){
console.log("originalUrl: " + req.originalUrl);
console.log("baseUrl: " + req.baseUrl);
console.log("path: " + req.path);
res.end();
});
app.listen(3001);
输入:
http://127.0.0.1:3001/admin/login/student
输出:
originalUrl: /admin/login/student
baseUrl: /admin
path: /login/student
use()也可以调用外部的function()。
var express = require("express");
var fs = require("fs");
var app = express();
app.use("/", shows);
app.listen(3001);
function shows(req, res, next){
var filePath = req.originalUrl;
fs.readFile("./views/" + filePath, function(err, data){
if(err)
{
next();
return;
}
res.send(data.toString());
});
}
前端输入网址
http://127.0.0.1:3001/index.html
代码会读取views文件夹下的index.html文件,呈现在前端。