8 - Batista Harahap

OAUTHnesia for Windows 8 Metro Apps C#

Posted on April 2, 2012 | Batista Harahap

The last few days at Bandung was spent hacking a “proof of concept” application for Windows 8 Metro without using Urbanesia’s OAUTHnesia library. Now the library is done but still needs a few tweaks. All updates of the codes will be live in its Github Gist.

Without further ado, here’s the gist: [gist]

	using System;
	using System.Collections.Generic;
	using System.Diagnostics;
	using System.Net.Http;
	using System.Threading.Tasks;

	/**
	* OAUTHnesia for Windows 8 Metro Apps C#
	*
	* OAUTH v1.0a library for C# to access Urbanesia API
	*
	* @package OAUTHnesia
	* @subpackage Windows 8 Metro Apps C#
	* @category Library
	* @author Batista R. Harahap <batista@bango29.com>
	* @link http://www.bango29.com
	* @license MIT License - http://www.opensource.org/licenses/mit-license.php
	*
	* Permission is hereby granted, free of charge, to any person obtaining a
	* copy of this software and associated documentation files (the "Software"),
	* to deal in the Software without restriction, including without limitation
	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	* and/or sell copies of the Software, and to permit persons to whom the
	* Software is furnished to do so, subject to the following conditions:
	*
	* The above copyright notice and this permission notice shall be included in
	* all copies or substantial portions of the Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
	* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
	* IN THE SOFTWARE.
	*/
	namespace Urbanesia.Libraries
	{
	class OAUTHnesia
	{
	private string
	ConsumerKey,
	ConsumerSecret,
	UserKey,
	UserSecret,
	SafeEncode,
	ApiUri;

	public static string
	BASE_URL = "http://api1.urbanesia.com/",
	OAUTH_SAFE_ENCODE = "1",
	OAUTH_NO_SAFE_ENCODE = "0";

	public OAUTHnesia(string consumerKey, string consumerSecret, string safeEncode)
	{
	this.ConsumerKey = consumerKey;
	this.ConsumerSecret = consumerSecret;
	this.SafeEncode = safeEncode;
	}

	public OAUTHnesia(string consumerKey, string consumerSecret, string userKey, string userSecret, string safeEncode)
	{
	this.ConsumerKey = consumerKey;
	this.ConsumerSecret = consumerSecret;
	this.UserKey = userKey;
	this.UserSecret = userSecret;
	this.SafeEncode = safeEncode;
	}

	public async Task<string> Oauth(string uri = "", string post = "", string get = "", bool signWithUserTokens = false)
	{
	// Set URI
	this.ApiUri = uri;

	// Default POST body
	string _defaultPost = String.Format(
	"oauth_consumer_key={0}&oauth_nonce={1}&oauth_signature_method=HMAC-SHA1&oauth_timestamp={2}"+
	"&oauth_version=1.0",
	this.ConsumerKey,
	GetNonce(),
	Utils.GetUnixTimeAsString()
	);

	// Add User Token Key to default POST body if requested
	if (signWithUserTokens == true)
	_defaultPost += String.Format("{0}&oauth_token={1}", _defaultPost, this.UserKey);

	// Merge default POST with actual POST
	if (post == "")
	{
	post = _defaultPost;
	}
	else
	{
	post += "&" + _defaultPost;
	}

	// Add Safe Encode if requested
	if (this.SafeEncode == OAUTH_SAFE_ENCODE)
	{
	post += "&safe_encode=" + OAUTH_SAFE_ENCODE;
	}

	// Merge POST + GET and sort the array
	string requestify = this.Sortify(post + "&" + get);

	// Encode for OAUTH
	requestify = EncodeForOauth(requestify);

	// Base Signature
	string baseSig = GenerateBaseSignature(requestify);
	Debug.WriteLine("Base Signature: " + baseSig);

	// Signature
	string signature = signWithUserTokens == true ?
	Utils.HmacSha1(baseSig, String.Format("{0}&{1}", this.ConsumerSecret, this.UserSecret)) :
	Utils.HmacSha1(baseSig, String.Format("{0}&", this.ConsumerSecret));

	// Build URL
	string oauthSig = String.Format("?oauth_signature={0}", signature);
	// Replace all %20 to %2B
	get = get.Replace("%20", "%2B");
	string url = String.Format("{0}{1}{2}&{3}", BASE_URL, ApiUri, oauthSig, get);

	return await SendRequest(url, GeneratePostContent(post));
	}

	private FormUrlEncodedContent GeneratePostContent(string post)
	{
	string[] sp = post.Split('&');
	Dictionary<string, string> dict = new Dictionary<string, string>();

	foreach(string vals in sp)
	{
	string[] temp = vals.Split('=');
	dict.Add(temp[0], temp[1]);
	}
	return new FormUrlEncodedContent(dict);
	}

	private async Task<string> SendRequest(string url, FormUrlEncodedContent post)
	{
	HttpClient http = new HttpClient() { MaxResponseContentBufferSize = 256 * 1024 };
	HttpResponseMessage response = await http.PostAsync(url, post);
	response.EnsureSuccessStatusCode();

	return await response.Content.ReadAsStringAsync();
	}

	private string GenerateBaseSignature(string s)
	{
	return String.Format("POST&{0}&{1}", Utils.UrlEncode(BASE_URL + this.ApiUri), Utils.UrlEncode(s));
	}

	private String EncodeForOauth(string s)
	{
	string[] sp = s.Split('&');
	string stify = "";
	for (int i = 0, j = 0, max = sp.Length; i < max; i++)
	{
	if (j == 1)
	stify += "&";

	string[] temp = sp[i].Split('=');
	stify += Utils.UrlEncode(temp[0]) + "=" + Utils.UrlEncode(temp[1]);
	j = 1;
	}
	return stify;
	}

	private string Sortify(string s)
	{
	string[] sp = s.Split('&');
	Array.Sort(sp);
	string stify = "";
	for (int i = 0, j = 0, max = sp.Length; i < max; i++)
	{
	if (j == 1)
	stify += "&";

	string[] temp = sp[i].Split('=');
	stify += temp[0] + "=" + temp[1];
	j = 1;
	}
	return stify;
	}

	private string GetNonce()
	{
	return Utils.Md5("FSoNTivj8iyqucRI6tx88NYICcuyrdVovJMqBwLz" + DateTime.UtcNow.Millisecond);
	}
	}
	}

view raw OAUTHnesia.cs hosted with ❤ by GitHub

	using System;
	using Windows.Security.Cryptography;
	using Windows.Security.Cryptography.Core;
	using Windows.Storage.Streams;

	/**
	* OAUTHnesia for Windows 8 Metro Apps C#
	*
	* OAUTH v1.0a library for C# to access Urbanesia API
	*
	* @package OAUTHnesia
	* @subpackage Windows 8 Metro Apps C#
	* @category Library
	* @author Batista R. Harahap <batista@bango29.com>
	* @link http://www.bango29.com
	* @license MIT License - http://www.opensource.org/licenses/mit-license.php
	*
	* Permission is hereby granted, free of charge, to any person obtaining a
	* copy of this software and associated documentation files (the "Software"),
	* to deal in the Software without restriction, including without limitation
	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	* and/or sell copies of the Software, and to permit persons to whom the
	* Software is furnished to do so, subject to the following conditions:
	*
	* The above copyright notice and this permission notice shall be included in
	* all copies or substantial portions of the Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
	* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
	* IN THE SOFTWARE.
	*/
	namespace Urbanesia.Libraries
	{
	class Utils
	{
	public static string
	CONSUMER_KEY = "CONSUMER_KEY",
	CONSUMER_SECRET = "CONSUMER_SECRET";

	public static string Md5(string str)
	{
	var alg = HashAlgorithmProvider.OpenAlgorithm("MD5");
	IBuffer buff = CryptographicBuffer.ConvertStringToBinary(str, BinaryStringEncoding.Utf8);
	var hashed = alg.HashData(buff);
	var res = CryptographicBuffer.EncodeToHexString(hashed);
	return res;
	}

	public static string GetUnixTimeAsString()
	{
	TimeSpan ts = (DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0));
	return Convert.ToString(ts.TotalSeconds);
	}

	public static int GetUnixTimeAsInteger()
	{
	TimeSpan ts = (DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0));
	return Convert.ToInt32(ts.TotalSeconds);
	}

	public static long GetUnixTimeAsLong()
	{
	TimeSpan ts = (DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0));
	return Convert.ToInt64(ts.TotalSeconds);
	}

	public static string HmacSha1(string baseString, string keyString)
	{
	var crypt = MacAlgorithmProvider.OpenAlgorithm("HMAC_SHA1");
	var buffer = CryptographicBuffer.ConvertStringToBinary(baseString, BinaryStringEncoding.Utf8);
	var keyBuffer = CryptographicBuffer.ConvertStringToBinary(keyString, BinaryStringEncoding.Utf8);
	var key = crypt.CreateKey(keyBuffer);

	var sigBuffer = CryptographicEngine.Sign(key, buffer);
	string signature = CryptographicBuffer.EncodeToBase64String(sigBuffer);
	return signature;
	}

	public static string UrlEncode(string s)
	{
	switch (s)
	{
	case "+":
	return "%2B";
	default:
	return System.Uri.EscapeDataString(s);
	}
	}
	}
	}

view raw Utils.cs hosted with ❤ by GitHub

[/gist]

8 api metro metro style oauth oauthnesia urbanesia urbanesia api windows windows 8

Microsoft Windows 8 Bootcamp Bandung

Posted on April 2, 2012 | Batista Harahap

Urbanesia was invited to Microsoft Window 8’s Bootcamp in Bandung last weekend. Me, Arieditya and Aditya went there to see and experience ourselves the technical depth provided by the Windows 8 team. To cut things short, the experience was reinvigorating! After a bunch of process of liking, hating, yeah right-ing, hating, liking and now loving, I felt Microsoft’s attention to developers is an example to follow for other big names. [Read More]

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