Dynyx’s gists

Dynyx / NormalizeURL.cs

Created June 4, 2012 13:37

Normalize URL

	public static List<string> NormalizeUrls(List<string> urls, string rootUrl)
	{
	Uri uri;
	if (!Uri.TryCreate(rootUrl, UriKind.Absolute, out uri)) return new List<string>();
	return urls.Select(url => !Uri.IsWellFormedUriString(url, UriKind.Absolute) ? string.Concat(uri.AbsoluteUri, url) : url).Distinct().ToList();
	}

Dynyx / ExtractURL.cs

Created June 4, 2012 13:36

Extract URLs from string

	public static List<string> ExtractUrls(string source)
	{
	// match.Groups["name"].Value - URL Name
	// match.Groups["url"].Value - URI
	const string regexPattern = @"<a.?href=[""'](?<url>.?)[""'].?>(?<name>.?)</a>";
	var matches = Regex.Matches(source, regexPattern, RegexOptions.IgnoreCase);
	return (from Match match in matches select match.Groups["url"].Value).ToList();
	}

Dynyx / DownloadImage.cs

Created June 4, 2012 13:36

Download image from URL

	public Image DownloadImage(string url)
	{
	Image image = null;

	try
	{
	var httpWebRequest = (HttpWebRequest)WebRequest.Create(url);
	httpWebRequest.AllowWriteStreamBuffering = true;
	httpWebRequest.UserAgent = "Mozilla/5.0 (Windows; U; Windows NT 6.1; rv:2.2) Gecko/20110201";
	httpWebRequest.Referer = "http://www.google.com/";

Dynyx / DownloadURL.cs

Created June 4, 2012 13:35

Download webpage from URL

	public static string DownloadWebPage(string url)
	{
	var webRequestObject = (HttpWebRequest)WebRequest.Create(url);

	webRequestObject.UserAgent = "Mozilla/5.0 (Windows; U; Windows NT 6.1; rv:2.2) Gecko/20110201";
	webRequestObject.Referer = "http://www.google.com";

	try
	{
	var response = webRequestObject.GetResponse();

Dynyx / MobileBrowserDetection.cs

Created June 4, 2012 13:34

Mobile browser detection

	using System.Text.RegularExpressions;
	using System.Web;
	using System.Web.Mvc;
	using System.Web.Routing;

	namespace MobileTest
	{
	/*
	* Add the global filer RedirectMobileDevicesToMobileAreaAttribute to the global filter collection in
	* the Application_Start() of Global.asax.cs file

Dynyx / Permutation.cs

Created June 4, 2012 13:34

Permutation

	using System;
	using System.Collections.Generic;
	using System.Linq;

	namespace Permutation
	{
	public static class Extension
	{
	public static IEnumerable<IEnumerable<T>> Permutations<T>(this IEnumerable<T> source)
	{

Dynyx / BuildCookie.cs

Created June 4, 2012 13:33

Create authentication cookie

	public static HttpCookie BuildCookie(int userprofileId)
	{
	FormsAuthentication.Initialize();

	FormsAuthenticationTicket ticket = new FormsAuthenticationTicket(
	1,
	userprofileId.ToString(CultureInfo.InvariantCulture),
	DateTime.Now,
	DateTime.Now.AddMinutes(30),
	false,

Dynyx / Application_AuthenticateRequest.cs

Created June 4, 2012 13:33

Global.asax handle Application_AuthenticateRequest

	protected void Application_AuthenticateRequest(Object sender, EventArgs e)
	{
	if (HttpContext.Current.User == null) return;
	if (!HttpContext.Current.User.Identity.IsAuthenticated) return;
	var id = HttpContext.Current.User.Identity as FormsIdentity;
	if (id == null) return;

	FormsAuthenticationTicket ticket = id.Ticket;
	string userData = ticket.UserData;
	string[] roles = userData.Split(',');

Dynyx / Paginate.html

Created June 4, 2012 13:32

JSON AJAX pagination

Dynyx / ReCaptcha.cs

Created June 4, 2012 13:31

Using ReCaptcha in an MVC application

	// First, install the reCaptcha library from Nuget https://nuget.org/packages/recaptcha.
	// Then, create your public and private keys at http://www.google.com/recaptcha.

	// 1. Create an extension method to genereate the Recaptcha javascript
	public static class Extension
	{
	public static MvcHtmlString GenerateCaptcha(this HtmlHelper htmlHelper)
	{
	var html = Recaptcha.RecaptchaControlMvc.GenerateCaptcha(htmlHelper);
	return MvcHtmlString.Create(html);