标签:des style blog http color io os java ar
因为Express.js的不同版本的api有差异,本文的代码针对express 3.2.5
----package.json
----index.js
1.在项目目录下建立文件,package.json,这个文件是npm安装项目所需包的依据。
package.json
{
"name": "hello-world",
"description": "hello world test app",
"version": "0.0.1",
"private": true,
"dependencies": {
"express": "3.2.5"
}
}
2.在命令行窗口打开项目所以在目录通过npm安装项目依赖包,安装后出现文件夹node_modules,其中包含了express包:
npm install
3.建立文件index.js.Express提供了"routing"这个东西,其实就是,app.get(),app.post(),app.all(),这个三个函数,第一参数是路径,第一个参数是一个回调函数。
index.js
var express = require("express");
var http = require("http");
var app = express();
app.all("*", function(request, response, next) {
response.writeHead(404, { "Content-Type": "text/plain" });
next();
});
app.get("/", function(request, response) {
response.end("Welcome to the homepage!");
});
app.get("/about", function(request, response) {
response.end("Welcome to the about page!");
});
app.get("*", function(request, response) {
response.end("404!");
});
http.createServer(app).listen(3000);
4.浏览器端访问URL:
http://127.0.0.1:3000

浏览器端访问URL:
http://127.0.0.1:3000/about

浏览器端访问URL:
http://127.0.0.1:3000/*

标签:des style blog http color io os java ar
原文地址:http://www.cnblogs.com/IanI/p/3994543.html