如何利用nodejs搭建一个框架 如何一体化一个NodeJs的MVC开发框架
\u5982\u4f55\u7528Node\u53bb\u5199\u4e00\u4e2aWeb\u5e94\u7528\u6846\u67b6\u7b2c\u4e00\u6b65\uff0c\u7528node\u8f93\u51fa\u4e00\u4e2ahello world
var http=require('http'); http.createServer(function(req,res){ var urlPares=url.parse(req.url); var query=querystring.parse(urlPares.query); res.end('hello world'); }).listen(80);\u5927\u90e8\u5206\u7684node\u6559\u7a0b\u5728\u8fd9\u91cc\u4f1a\u544a\u8bc9\u4f60\uff0c\u6211\u4eec\u5f88\u5bb9\u6613\u7684\u5efa\u7acb\u7684\u4e00\u4e2a\u670d\u52a1\u5668\u3002\u4f46\u662f\u5728\u5b9e\u9645\u4f7f\u6211\u4eec\u901a\u5e38\u4f7f\u7528\u7684\u662fexpress.(f**k,\u96be\u9053Node\u5fc5\u987b\u8981\u7528express\u5417\uff1f\u81ea\u5df1\u5b9e\u73b0\u4e00\u4e2aWeb\u5e94\u7528\u6846\u67b6\u771f\u7684\u5f88\u96be\u5417\uff1f\uff09\u5176\u5b9e\u5e76\u4e0d\u662f\u3002\u90a3\u4e48\u65e2\u7136\u6253\u7b97\u81ea\u5df1\u5199\u6211\u4eec\u9996\u5148\u8981\u77e5\u9053\u6211\u4eec\u8981\u505a\u54ea\u4e9b\u4e8b\u60c5\u3002 1.\u8def\u7531\u6216\u8005\u667a\u80fd\u8def\u7531 2.\u9759\u6001\u6587\u4ef6\u8f93\u51fa 3.session/cookie 4.\u6a21\u7248\u6e32\u67d3 5.\u6570\u636e\u5e93\u5904\u7406 6.\u6587\u4ef6\u4e0a\u4f20\u7b2c\u4e8c\u6b65\uff0c\u8def\u7531\u8def\u7531\u597d\u9ad8\u5927\u4e0a\u7684\u540d\u5b57\uff0c\u5b83\u662f\u5e72\u5565\u7684\uff1furl\u5bf9\u5e94\u5177\u4f53\u65b9\u6cd5\u5c31\u662f\u5b83\u8be5\u505a\u7684\u4e8b\u60c5\u3002 \u90a3\u4e48\u6211\u4eec\u4e3a\u4ec0\u4e48\u4e0d\u8ba9url\u5bf9\u5e94xxx\u6587\u4ef6\u7684xx\u65b9\u6cd5\u3002 \u4f8b\u5982\uff1a/user/login\u80fd\u4e0d\u80fd\u81ea\u52a8\u5bf9\u5e94\u5230user.js\u7684login\u65b9\u6cd5\u4e0a\u3002\u5b9e\u73b0\u8d77\u6765\u5f88\u96be\u4e48\uff1f\u5176\u5b9e\u53ea\u9700\u8981\u51e0\u53e5\u4ee3\u7801
var fs = require("fs"); module.exports=function(req,res){ var query=req.query; var urlPares=req.urlPares; var pathname=urlPares.pathname; var arr=pathname.split("/"); req.arr=arr; //start \u8fd9\u6bb5\u4ee3\u7801\u5904\u7406\u9ed8\u8ba4\u884c\u4e3a\u3002\u53ef\u4ee5\u5148\u5ffd\u7565 if(arr.length==0||arr.length==1){ arr=["","index","index"]; }else if(arr.length==2){ arr.push("index"); } if(arr[1]==""){ arr[1]="index"; } if(arr[2]==""){ arr[2]="index"; } //end \u8fd9\u6bb5\u4ee3\u7801\u5904\u7406\u9ed8\u8ba4\u884c\u4e3a\u3002\u53ef\u4ee5\u5148\u5ffd\u7565 if (fs.existsSync(APP_PATH+'/controller/'+arr[1]+'.js')){ var controller=require('./controller/'+arr[1]); if(controller[arr[2]]){ controller[arr[2]](req,res); }else{ res.writeHead(404,{'Content-Type': 'text/plain' }); res.end("\u4f60\u8bbf\u95ee\u7684\u63a7\u5236\u5668\u4e0d\u5b58\u5728\u6307\u5b9a\u65b9\u6cd5"); } }else{ res.writeHead(404,{'Content-Type': 'text/plain' }); res.end("\u4f60\u8bbf\u95ee\u7684\u8def\u5f84\u4e0d\u5b58\u5728"); } }\u901a\u8fc7fs\u5224\u65ad\u6587\u4ef6\u662f\u5426\u5b58\u5728\u3002\u7136\u540e\u53bbrequire\u5b83\u5c31\u884c\u4e86\u3002APP_PATH\u662f\u4e2a\u5168\u5c40\u53d8\u91cf\u8868\u793a\u7a0b\u5e8f\u5165\u53e3\u7684\u8def\u5f84\u3002\u7b2c\u4e09\u6b65\uff0c\u9759\u6001\u6587\u4ef6\u8f93\u51fa\u9759\u6001\u6587\u4ef6\u8f93\u51fa\u6211\u4eec\u9700\u8981\u4e00\u4e2a\u5e93MIME
var url = require("url"); var fs = require("fs"); var mime = require('mime'); /** * [[\u68c0\u6d4b\u662f\u5426\u4e3a\u9759\u6001\u8d44\u6e90]] * @param {Object} req [[Description]] * @param {[[Type]]} res [[Description]] * @returns {bool} [[Description]] */ module.exports = function (req, res) { //\u6b63\u5219\u8868\u8fbe\u5f0f\u68c0\u6d4b\u6587\u4ef6\u540e\u7f00 var url_resource_reg = /.*\.(html|htm|gif|jpg|jpeg|bmp|webp|htc|swf|png|ico|txt|js|css)/; if (!url_resource_reg.test(req.url)) { return false; } var urlPares = url.parse(req.url); var pathname = urlPares.pathname; var fileUrl = APP_PATH + "/static" + pathname; if (fs.existsSync(fileUrl)) { var contentType = mime.lookup(fileUrl); res.setHeader('Content-Type', contentType || "text/plain"); var fileStream = fs.createReadStream(fileUrl); fileStream.pipe(res); fileStream.on('end', function () { res.end(); }); return true; } else { return false; } } \u7b2c\u56db\u6b65\uff0csession/cookie\u8fd9\u91cc\u7a0d\u5fae\u6709\u70b9\u3002\u4f46\u662f\u4ee3\u7801\u91cf\u4e5f\u4e0d\u591a var sessions = {}; var sessionKey = 'session_key'; var EXPIRES = 30 * 60 * 1000; function randString(size) { var result = ''; var allChar = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'; size = size || 1; while (size--) { result += allChar.charAt(rand(0, allChar.length - 1)); } return result; } var generate = function () { var session = {}; session.id = Date.now() + randString(12); session.cookies = { expire: Date.now() + EXPIRES } sessions[session.id] = session; return session; } var parseCookie= function (cookie) { var cookies = {}; if (!cookie) { return cookies; } var list = cookie.split(";"); for (var i = 0; i Date.now()) { session.cookies.expire = Date.now() + EXPIRES; req.session = session; } else { delete sessions[id]; req.session = generate(); } } else { req.session = generate(); } } for (var key in sessions) { if (sessions[key].cookies.expire < Date.now()) { delete sessions[key]; } } var writeHead = res.writeHead; res.writeHead = function () { delete req.cookies[ham_sessionKey]; var sessionStr = serialize(ham_sessionKey, req.session.id); res.setHeader('Set-Cookie', serializeCookies(req.cookies).concat(sessionStr)); return writeHead.apply(res, arguments); } }\u7b2c\u4e94\u6b65\uff0c\u6a21\u7248\u6e32\u67d3
\u8fd9\u662f\u6700\u7b80\u5355\u7684\u3002
\u7b2c\u516d\u6b65\uff0c\u6570\u636e\u5e93\u5904\u7406
\u8fd9\u91cc\u53ef\u4ee5\u662f\u7528\u4e00\u4e9bORM\u6846\u67b6\u3002
\u7b2c\u4e03\u6b65\uff0c\u6587\u4ef6\u4e0a\u4f20\uff0cpost
\u7b2c\u516b\u6b65\uff0c\u5c31\u662f\u4f60\u628a\u4e0a\u9762\u7684\u4ee3\u7801\u7ec4\u7ec7\u8d77\u6765\u3002
\u672c\u6846\u67b6\u9002\u5408\u4f7f\u7528NodeJs\u8fdb\u884cweb\u5f00\u53d1\u7684MVC\u6846\u67b6\u6a21\u5f0f\uff0c\u672c\u6846\u67b6\u4f7f\u7528\u4e86express\u6846\u67b6\u4f5c\u4e3anodejs\u7684web\u5f00\u53d1\u652f\u6491\uff0c\u4f7f\u7528mysql\u4f5c\u4e3a\u6570\u636e\u5e93\u5f00\u53d1\u6e90\uff0c\u4e0b\u9762\u6211\u4eec\u5c31\u7b80\u5355\u7684\u4ecb\u7ecd\u5982\u4f55\u5229\u7528\u672c\u6846\u67b6\u8fdb\u884c\u4e00\u4e2a\u7b80\u5355\u7684web\u5e94\u7528\u5f00\u53d1\u3002\u5f53\u7136\u672c\u6846\u67b6\u5e76\u975e\u5b98\u65b9\uff0c\u4e5f\u5e76\u975e\u4e13\u4e1a\u8bbe\u8ba1\uff0c\u5e0c\u671b\u5f00\u53d1\u8005\u5171\u540c\u6765\u628a\u672c\u6846\u67b6\u8bbe\u8ba1\u597d\uff0c\u4ee5\u4fbf\u6211\u4eec\u53ef\u4ee5\u5728\u56fd\u5185\u5b9e\u73b0\u4e00\u4e2aNodeJs\u7684Web\u5f00\u53d1\u6846\u67b6\u3002
\u4e00\u3001\u9879\u76ee\u6587\u4ef6\u5939\u4ecb\u7ecd
\u9879\u76ee\u6587\u4ef6\u5939\u4e3b\u8981\u662f\u6839\u636e\u4f20\u7edf\u7684MVC\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u8bbe\u8ba1\u51fa\u6765\u7684\u6846\u67b6\u3002
enter image description here
\u4e8c\u3001 \u5165\u53e3\u6587\u4ef6\u4ecb\u7ecd
\u672c\u6846\u67b6\u7684\u5165\u53e3\u6587\u4ef6\u4e3aindex.js\uff0c\u8be5\u5165\u53e3\u4f60\u53ef\u4ee5\u6dfb\u52a0\u591a\u79cd\u5168\u5c40\u9759\u6001\u53d8\u91cf\uff0c\u4f8b\u5982\u4f60\u6240\u9700\u8981\u7684\u5404\u4e2a\u6587\u4ef6\u5939\u8def\u5f84\uff0c\u4ee5\u53ca\u4e00\u4e9b\u6a21\u5757\u3002
\u4e3e\u4f8b\u5982\u4e0b:
//========================\u5168\u5c40\u53d8\u91cf\u5b9a\u4e49===============================
global.BASE_DIR = __dirname;
global.APP = global.BASE_DIR + "/application/";
global.CON = global.APP + "/controller/";
global.CORE = global.APP + "/core/";
global.MODEL = global.APP + "/model/";
global.CONF = global.BASE_DIR + "/conf/";
global.log = global.BASE_DIR + "/log/";
global.PUBLIC = global.BASE_DIR + "/public/";
global.VIEW = global.BASE_DIR + "/view/";
/**
modules\u5f15\u5165
*/
global.express = require(\u2018express\u2019);
global.sio = require(\u2018socket.io\u2019);
global.fs=require(\u2018fs\u2019);
global.path = require(\u2018path\u2019);
global.url = require(\u2018url\u2019);
global.parseCookie = require(\u2018connect\u2019).utils.parseCookie;
global.MemoryStore = require(\u2018./node_modules/connect/lib/middleware/session/memory\u2019);
global.Session = require(\u2018./node_modules/connect/lib/middleware/session/session\u2019);
global.sys = require(\u2018util\u2019);
\u4ee3\u78012-1:index.js
\u5728index.js\u4e2d\u4f60\u9700\u8981\u5c06\u4f60\u6240\u6709\u7684\u6587\u4ef6\u5939\u8def\u5f84\u3001\u6a21\u5757\u4f7f\u7528\u5168\u5c40\u53d8\u91cf\u8fdb\u884c\u66ff\u6362\uff0c\u8be5\u65b9\u6cd5\u7684\u4f18\u52bf\u5728\u4e8e\uff0c\u907f\u514d\u7528\u6237\u5728\u7f16\u7801\u4e2d\u5f15\u5165\u8fc7\u957f\u7684\u6587\u4ef6\u8def\u5f84\uff0c\u53ea\u9700\u8981\u4f7f\u7528\u7b80\u5355\u7684\u53d8\u91cf\u8fdb\u884c\u66ff\u6362\u3002
urlResolve = require(CORE + \u201curl_resolve\u201d);
urlResolve.getActionInfo();
\u4ee3\u7801\uff1a2-2\uff1a\u8def\u7531\u5904\u7406\u903b\u8f91
\u672c\u4ee3\u7801\u5305\u542b\u8fdb\u903b\u8f91\u5904\u7406\u7c7b\uff0c\u540c\u65f6\u5e94\u7528\u903b\u8f91\u5904\u7406\u7c7b\u4e2d\u7684getActionInfo\u65b9\u6cd5\uff0c\u521b\u5efa\u670d\u52a1\u5668\uff0c\u5e76\u4e14\u5904\u7406url\u8bf7\u6c42\u903b\u8f91\u3002
\u4e09\u3001 \u8def\u7531\u5904\u7406\u903b\u8f91
\u4e3b\u8981\u6709\u516d\u4e2a\u65b9\u6cd5\uff0c\u5176\u4e2d\u7684getActionInfo\u662fexports\uff0c\u5176\u4ed6\u65b9\u6cd5\u5747\u4e3a\u79c1\u6709\u65b9\u6cd5\u3002
exports.getActionInfo = function(){
systemConfig();
app.get('/:key', function(req, res){
callUrlRequest(req, res);
});
app.post('/:key', function(req, res){
callUrlRequest(req, res);
});
listenPort();
};
function callUrlRequest(req, res){
var routerMsg = getUrlConf();
var key = req.params.key;
var session = checkSession(req, key);
if(key == "favicon.ico"){return;};
if(session == 0){
res.redirect('/index');
return;
}
console.log("[key:"+ key +"] " + "[class:" + routerMsg[key].cla + "] " + "[controller:" + routerMsg[key].fun +"]");
require(CON + routerMsg[key].con);
var controllerObj = eval("new " + routerMsg[key].cla);
controllerObj.init(req, res);
controllerObj[routerMsg[key].fun].call();
}
\u4ee3\u78012-3\uff1a\u8def\u7531\u5904\u7406getActionInfo
SystemConfig\u662f\u914d\u7f6eexpress\u6846\u67b6\u7684\u76f8\u5e94\u6570\u636e\uff0c\u914d\u7f6e\u9759\u6001\u6587\u4ef6\u5939\u4ee5\u53caexpress\u6846\u67b6\u7684\u76f8\u5e94\u914d\u7f6e\u6570\u636e\u3002\u4e4b\u540e\u6dfb\u52a0\u4e24\u79cdurl\u8bf7\u6c42\u65b9\u5f0f\uff0c\u5206\u522b\u662fget\u548cpost\u65b9\u6cd5\uff0c\u7531\u4e8e\u4e24\u79cd\u65b9\u6cd5\u8bf7\u6c42\u8d44\u6e90\u7684\u8def\u7531\u5904\u7406\u90fd\u662f\u4e00\u6837\u7684\uff0c\u56e0\u6b64\u4f7f\u7528callUrlRequest\u6765\u5904\u7406\u3002
callUrlRequest \u83b7\u53d6\u8def\u7531\u914d\u7f6e\u6587\u4ef6\u4fe1\u606fgetUrlConf\uff1b
2\u3001\u83b7\u53d6\u5f53\u524d\u8bbf\u95ee\u7684key\u503c\uff0c\u6839\u636ekey\u503c\u5f97\u5230\u76f8\u5e94\u7684\u914d\u7f6e\u4fe1\u606f\uff0c\u914d\u7f6e\u6587\u4ef6\u53ef\u4ee5\u5c55\u793a\u5982\u4e0b\uff1a
"test": {
"con" : "test",
"cla" : "test",
"fun" :"test"
},
"favicon.ico" : {
"con" : "",
"cla" : "",
"fun" : ""
},
"login" : {
"con" : "index_controller",
"cla" : "IndexController",
"fun" : "loginAct"
},
"index" : {
"con" : "index_controller",
"cla" : "IndexController",
"fun" : "loginPageAct"
},
"loginS" : {
"con" : "index_controller",
"cla" : "IndexController",
"fun" : "toMainPageAct"
}
}
\u4ee3\u78012-4\uff1a\u914d\u7f6e\u6587\u4ef6\u4fe1\u606f
\u5982\u679c\u5f53\u524dkey\u4e3atest\u90a3\u4e48\u6211\u4eec\u5c31\u53ef\u4ee5\u5f97\u5230\u76f8\u5e94\u7684controller\u3001class\u548cfunction\u3002\u540c\u65f6\u56e0\u4e3anodejs\u670d\u52a1\u5668\u6bcf\u6b21\u8bf7\u6c42\u6570\u636e\u7684\u65f6\u5019\u90fd\u4f1a\u52a0\u5165favicon.ico\uff0c\u56e0\u6b64\u5728\u4ee3\u7801\u4e2d\u6211\u4eec\u9700\u8981\u5c06\u5176\u5254\u9664\u3002\u5bf9\u4e8echeckSession\u5c31\u662f\u9a8c\u8bc1\u767b\u5f55\u4fe1\u606f\u3002
3. \u5f97\u5230controller\u3001class\u548cfunction\uff0c\u9996\u5148require\u76f8\u5e94\u7684controller\uff0c\u7136\u540e\u4f7f\u7528eval\u6765new\u76f8\u5e94\u5bf9\u8c61\uff0c\u4f7f\u7528controllerObj[routerMsg[key].fun].call();\u8be5\u65b9\u6cd5\u8fdb\u884c\u8c03\u7528\u3002\uff08\u672c\u90e8\u5206\u5904\u7406\uff0c\u6d89\u53ca\u5230\u4e00\u4e2aJavaScript\u7684\u5c0f\u6280\u5de7\uff0c\u5982\u4f55\u5bf9\u4e00\u4e2a\u5b57\u7b26\u4e32\u8fdb\u884cnew\uff0c\u540c\u65f6\u8c03\u7528\u4e00\u4e2a\u5bf9\u8c61\u7684\u65b9\u6cd5\uff0c\u8be5\u65b9\u6cd5\u540d\u4e3a\u5b57\u7b26\u4e32\u53d8\u91cf\uff09
4. \u6700\u540e\u5c31\u662flistenPort();\u8fdb\u884c\u76d1\u542c\u4e8b\u4ef6\uff0c\u4e5f\u662f\u670d\u52a1\u5668\u5f00\u59cb\u542f\u52a8\u3002\u8fd9\u6837\u4e00\u4e2a\u57fa\u672c\u7684\u8def\u7531\u5904\u7406\u5c31\u5b8c\u6210\u5b9e\u73b0\u4e86\u3002
**\u56db\u3001 \u6570\u636e\u5c42\u5b9e\u73b0**
\u672c\u7cfb\u7edf\u6570\u636e\u5c42\u57fa\u7c7b\u662f\u5728core\u6587\u4ef6\u5939\u4e0b\u7684base_model.js\uff0c\u8be5\u7c7b\u4e3b\u8981\u5305\u542b\u6570\u636e\u5e93\u7684\u4e00\u822c\u65b9\u6cd5\uff0c\u4e3b\u8981\u542b\u6709\u6570\u636e\u5e93\u94fe\u63a5\u3001\u6570\u636e\u5e93\u64cd\u4f5c\u57fa\u672c\u65b9\u6cd5add\u3001update\u3001deleteItem\u3001query\u3001select\u7b49\uff0c\u5177\u4f53\u5b9e\u73b0\u65b9\u5f0f\uff0c\u5c31\u4e0d\u7ec6\u8bb2\u3002
BaseModel\u4e3a\u57fa\u7c7b\uff0c\u5176\u4ed6\u5bf9\u5e94\u4e8e\u76f8\u5e94\u7684\u8868\u7684\u7c7b\u90fd\u7ee7\u627f\u6765\u81eaBaseModel\u57fa\u7c7b
\u7ee7\u627f\u65b9\u6cd5\u4f7f\u7528JavaScript\u7684\u539f\u578b\u7ee7\u627f\uff1a
IndexController.prototype = new BaseController();
global.IndexController = IndexController;
**\u4e94\u3001 \u903b\u8f91\u5c42\u5b9e\u73b0**
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**\u516d\u3001 \u4ee3\u7801\u89c4\u8303
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获取Node安装包，可以访问以下Node.js框架官方网址：
在该页面中，我们可以看到适用于不同操作系统的、各个版本的Node安装包源文件，选中我们需要的版本类型直接下载就可以了。
2
在Windows操作系统环境下安装Node.js框架，直接运行下载好的Node安装包 源文件即可，目的路径一般选择如下：
D:/nodejs/
3
安装完毕后，读者可以到该目录下浏览一下具体内容，这样会对Node环境有一个大致的了解。
方法/步骤2
在Ubuntu（Linux）环境下需要运行apt命令进行安装，具体方法如下：
sudo apt-get install nodejs
如果想获取最新的Node安装源，具体方法如下：
sudo add-apt-repository ppa:chris-lea/node.js
sudo apt-get update
sudo apt-get install nodejs
3
一般情况下，node命令会被自动安装在以下路径之中（视不同的Ubuntu系统版本而定）：
/usr/local/bin/node
END
方法/步骤3
1
大致经过以上这几步的操作，Node.js框架就安装完毕了，为了检验Node环境是否正确，可以使用以下命令检测Node的版本：
node -v
2
如果显示出正确的版本号，则说明Node环境搭建成功了。
如果想要更好地学习nodejs，可以练练代码段的相关图书。
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