NodeJS入门（一）- 基本文件路由实现

使用http和fs模块实现文件路由和基本页面访问【不涉及后台交互】

分为三个文件：

app.js 应用文件(放在项目根目录)

server.js 服务器启动文件(放在server目录)

route.js 路由文件(放在route目录)

运行node app.js，即可

app.js

var server = require('./server/server');
var router = require('./route/route');

router.setRootPath(__dirname);

router.get('/', function(req, res){
router.sendFile(res, "/view/index.html");
});//处理/的get请求

server.start(router);

server.js

var http = require('http');

function start(router) {
http.createServer(function(request, response) {
router.init(request, response);
}).listen(8080);
console.log('Server 127.0.0.1:8080 starting');
}

exports.start = start;

route.js

var url = require('url');
var path = require('path');
var querystring = require('querystring');
var fs = require('fs');
module.exports = {
fileType: {
"css": "text/css",
"gif": "image/gif",
"html": "text/html",
"ico": "image/x-icon",
"jpeg": "image/jpeg",
"jpg": "image/jpeg",
"js": "text/javascript",
"json": "application/json",
"pdf": "application/pdf",
"png": "image/png",
"svg": "image/svg+xml",
"swf": "application/x-shockwave-flash",
"tiff": "image/tiff",
"txt": "text/plain",
"wav": "audio/x-wav",
"wma": "audio/x-ms-wma",
"wmv": "video/x-ms-wmv",
"xml": "text/xml"
},
routePathGet: {},
routePathPost: {},
get: function(pathname, fn) {
this.routePathGet[pathname] = fn;
},
post: function(pathname, fn) {
this.routePathPost[pathname] = fn;
},
rootPath: "",
setRootPath: function(rp) {
this.rootPath = rp;
},
sendFile: function(response, pathname) {
var ext = path.extname(pathname).slice(1);
var ft = this.fileType[ext] || "text/plain";
response.setHeader("Content-type", [ft, "charset=utf-8"]);
pathname = this.rootPath + pathname;
pathname = path.normalize(pathname);
fs.readFile(pathname, function(err, data) {
if (err) {
response.statusCode = 404;
response.end('404文件不存在');
} else {
response.statusCode = 200;
response.end(data, "binary");
}
});
},

init: function(request, response) {
console.log(request.url);
var fn = undefined;
var pathname = request.url;
if (request.method.toLowerCase() === 'get') {
fn = this.routePathGet[pathname];
} else {
fn = this.routePathPost[pathname];
}
if (fn) {
fn(request, response);
} else {
this.sendFile(response, pathname);
}
}
};

这里模块编写遵循JS函数式编程规范