Node.js 寫HTTP伺服器:實作紀錄
Node.js 利用Express來寫HTTP伺服器 : 實作紀錄
Node.js專案開發習慣
config : 專案通用設定(DB設定………..等等)
modeules (M): 功能模組(商業邏輯……等等)
public (V): 網頁
routes (C): 前後端媒合設定
Package.json : 專案使用的套件設定檔，建立於專案目錄下
執行 npm install 會將所需套件建立
$ npm install
{ //程式註解
"name":
"obapp",
"version":
"0.0.1",
"private":
true,
"scripts":
{
"start":
"node server.js"
},
//專案使用到的套件設定
//“package name”:”版本”
"dependencies":
{
"express":
"3.2.6",
"jade": "*",
"mongodb":
"*",
"mongoose":"*",
"request":"*",
"cheerio":"*",
"iconv-lite":"*",
"moment":"*",
"async":"*"
}
}
Server.js
: node.js 執行檔
建立Http 伺服器，將使用到express
及 fs(包含在node.js裡面，不須額外安裝) 套件
var express = require('express');
var fs = require('fs');
//******************
var app = express()
, http = require('http')
, path = require('path');
var models_dir = __dirname
+ '/modules';
//console.log(fs.readdirSync(models_dir));
fs.readdirSync(models_dir).forEach(function (file) {
if(file[0] === '.') return;
if(fs.statSync(models_dir+'/'+file).isDirectory()) {//如果是目錄
}else{
require(models_dir+'/'+ file);
}
});
//FB confing
fs.readdirSync(models_dir+"/fb/conf").forEach(function (file) {
if(file[0] === '.') return;
require(models_dir+'/fb/conf/'+ file);
});
//FB db
fs.readdirSync(models_dir+"/fb/db").forEach(function (file) {
if(file[0] === '.') return;
require(models_dir+'/fb/db/'+ file);
});
app.configure(function () {
app.set('port', process.env.OPENSHIFT_NODEJS_PORT || 8080);
app.set('node_ip',process.env.OPENSHIFT_NODEJS_IP || "127.0.0.1");
// app.set('views',
__dirname + '/app/views');
// app.set('view
engine', 'jade');
app.use(express.logger('dev')); //設定log
app.use(express.cookieParser()); //解析表頭裡的cookie
app.use(express.json()); //解析json格式
app.use(express.urlencoded()); //解析網址格式
app.use(express.bodyParser());
// is equivalent to:
app.use(express.json());
app.use(express.urlencoded());
app.use(express.multipart());
app.use(express.methodOverride());
app.use(app.router); //使用router
app.use(express.static(path.join(__dirname, 'public')));//可運行的靜態頁面
});
app.configure('development', function
() {
app.use(express.errorHandler());
});
require('./config/routes')(app); //將routes引用近來
//建立http
server 並監聽
http.createServer(app).listen(app.get('port'),app.get('node_ip'), function () {
console.log("Express server listening on port " + app.get('node_ip')
+ ":"
+ app.get('port'));
});
Config :
Config.js
module.exports = {
fbdb:{
db_uri:
"mongodb://127.0.0.1:27017/fb",
db_options:
{
db:
{ native_parser: true },
server:
{ poolSize: 5 }
},
},
etdb:{
db_uri:
"mongodb://192.168.48.111:27017/et",
db_options:
{
db:
{ native_parser: true },
server:
{ poolSize: 5 }
},
},
facebook:
{
clientID:
"{{PLACEHOLDER}}",
clientSecret:
"{{PLACEHOLDER}}",
callbackURL:
"{{PLACEHOLDER}}"
},
google:
{
clientID:
"{{PLACEHOLDER}}",
clientSecret:
"{{PLACEHOLDER}}",
callbackURL:
"{{PLACEHOLDER}}"
},
};
Routes.js
module.exports = function(app){
require('../routes/rtest.js')(app);
};
Modeules :
Test.js
var moment = require('moment');
moment.locale("zh-tw");
exports.sayHi = function(param,done) {
console.log(param);
var dt = moment().format("YYYY-MM-DD HH:mm");
if (typeof(param) !== "undefined") {
var docs = {
name : param.name,
dt : dt,
};
done(null, docs);
}else{
var docs = {
name : "沒有名字",
dt : dt,
};
done(null, docs);
};
} ;
Routes :
Rtest.js
var route = require('../modules/test');
module.exports = function(app) {
app.post("/do_sayhi",
function(req,
res) {
// console.log(req.body);
route.sayHi(req.body,function(err, doc){
if(err) throw err;
console.log(doc);
return res.json(200, {
message : "ok",
data : doc
});
});
});
};
Public :
Index.html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8" />
<title>Insert title here</title>
<script src="http://code.jquery.com/jquery-1.10.2.min.js"></script>
<script src="js/index.js"></script>
</head>
<body>
<div class="ui-widget">
<label>姓名:</label>
<input type="text" id="name">
<button id="doact">送出</button>
</div>
<div id="output"></div>
</body>
</html>
Index,js
$(document).ready(function(){
$('#doact').on('click', dosayhi);
});
var serverBaseUrl = "http://"+location.host;
function dosayhi() {
var name = $("#name").val();
$.ajax({
url : serverBaseUrl+'/do_sayhi',
//async: false,
type : 'POST',
dataType:"json",
data: {
name : name
},
success : function(smsg) {
if(smsg.message) {
var docs = smsg.data;
var name = docs.name;
var dt = docs.dt;
$("#output").html(dt
+ " : "
+name + " say hi");
}
},
error : function( jqXHR ,
textStatus, errorThrown ) {
console.log(jqXHR);
console.log('jqXHR=', jqXHR.status);
console.log('textStatus=', textStatus);
console.log('cerrorThrown=', errorThrown);
}
});
}
開始執行
npm install --> 將package.json 內的套件載入
node server.js --> 啟動 http server
參考文件
Express : http://expressjs.com
Node : https://nodejs.org
Jquery : https://jquery.com
W3c : http://www.w3schools.com
Moment : http://momentjs.com/docs/
Javascript : http://openhome.cc/Gossip/JavaScript/index.html
exports VS
module.exports
使用外部檔案
exports寫法有兩種 :
1.module.exports
將所有的功能寫入在同一個結構內。
EX : mod.js
module.exports = {
do_a : function(){
// do something ...
},
do_b : function(){
// do something ...
}
};
2.exports
一個功能一個功能分開寫。
EX : mod.js
exports.do_a = function(){
//
do something ...
};
exports.do_b = function(){
//
do something ...
};
呼叫使用方，兩種都一樣。
var mod= require( './mod' );
mod.do_a();
mod.so_b();
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