C# POST using WebRequest

標題：C#使用WebRequest POST後取得回傳資料
C# (Program.cs)：

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using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Net; //WebRequest WebResponse using System.IO; //Stream public class Global { public static string server = "http://127.0.0.1:1337"; } namespace WebPostRequest { class Program { static string login(string email, string password) { //宣告送出資料 string param = "email=" + email + "&password=" + password; byte[] byteArray = Encoding.UTF8.GetBytes(param); //Request資料 WebRequest request = WebRequest.Create(Global.server + "/login"); request.Credentials = CredentialCache.DefaultCredentials; ((HttpWebRequest)request).UserAgent = ".NET Framework Example Client"; request.Method = "POST"; request.ContentLength = byteArray.Length; request.ContentType = "application/x-www-form-urlencoded"; //處理資料流 Stream dataStream = request.GetRequestStream(); dataStream.Write(byteArray, 0, byteArray.Length); dataStream.Close(); //Response資料 WebResponse response = request.GetResponse(); string rawJsonString = new StreamReader(response.GetResponseStream()).ReadToEnd(); response.Close(); return rawJsonString; } static void Main(string[] args) { Console.WriteLine( login("test@gmail.com", "abcd1234") ); Console.WriteLine("\r\nPress enter key to continue...."); Console.Read(); } } }

說明：
簡單使用WebRequest POST送出email、password後回傳字串資料的作法。

Dynamic get jsonp

標題：動態取得Jsonp資料
JavaScript (index.html)：

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<div id="output_getjsonp"></div> <script type="text/javascript"> var getjsonp = function() { this.head = document.getElementsByTagName('head')[0] || document.documentElement; this.current = null; this.queue = []; }; getjsonp.prototype.request = function(q) { var fid = (q.fid||'_getjsonp') + new Date().getTime(); console.log(fid); var script = document.createElement('script'); script.src = q.url.replace('callback=?', 'callback=' + fid); this.queue.push({ fid : fid, script : script, load : q.load }); if(!this.current) this.action(); }; getjsonp.prototype.action = function() { var self = this; this.current = null; if(this.queue.length) { this.current = this.queue.shift(); window[this.current.fid] = function(data) { self.head.removeChild(self.current.script); self.current.load && self.current.load(data); self.action(); }; this.head.appendChild(this.current.script); } }; var jsonp = new getjsonp(); jsonp.request({ fid : '_myjsonp', url : 'http://codeboxy.blogspot.com/feeds/posts/default?alt=json&callback=?', load : function(data) { document.getElementById('output_getjsonp').innerHTML = data.feed.entry[0].title.$t; } }); </script>

範例結果：

Mask String

說明：
動態使用jsonp取得json資料，測試支援版本：

• Google Chrome 33.0.1750.146 m
• Firefox 27.0.1
• IE 11.0.9600.16518

JavaScript Advanced Logical Operators

標題：JavaScript邏輯運算子進階用法
JavaScript (main.js)：

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function foo() { console.log('Hello'); return true; } function bar() { console.log('World'); return false; } foo() && bar(); //Hello World bar() && foo(); //World foo() || bar(); //Hello bar() || foo(); //World Hello

說明：
1. foo()為true 則會繼續執行bar()
2. bar()為false不會繼續執行foo()
3. foo()為true 不會繼續執行bar()
4. bar()為false則會繼續執行foo()

Fluent Interface in exports of Node.js

標題：Node.js的exports使用流暢介面寫法
Node.js (main.js)：

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var my = require('./count.js'); var foo = new my.foo(10, 2); foo.plus().say(); foo.times().say();

exports js (count.js)：

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var foo = function(m, n) { this.m = m; this.n = n; this.answer = 0; this.method = ""; }; foo.prototype.plus = function() { this.answer = this.m + this.n; this.method = "+"; return this; }; foo.prototype.times = function() { this.answer = this.m * this.n; this.method = "*"; return this; }; foo.prototype.say = function() { console.log("%d %s %d = %d", this.m, this.method, this.n, this.answer); return this; }; exports.foo = foo;

範例結果：
10 + 2 = 12 10 * 2 = 20

說明：
在Node.js中採用流暢介面寫法，並使用exports建立一個外部js，在主程式中require後使用。