using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"(?:https?://)?(?:www\.)?(?:i\.)?imgur\.com/(?:gallery\/)?[a-zA-Z0-9]{7}(?:\.[a-zA-Z]{3,4})?";
string input = @"https://i.imgur.com/123/123/123.extension
https://i.imgur.com/jjwgT7i.jpg
https://i.imgur.com/gallery/jjwgT7i.jpg
// Imgur no gallery
(?:https?://)?(?:www\.)?(?:i\.)?imgur\.com/[a-zA-Z0-9]{7}\.[a-zA-Z]{3,4}
// Ingur with gallery
(?:https?://)?(?:www\.)?(?:i\.)?imgur\.com/(?:gallery\/)?[a-zA-Z0-9]{7}(?:\.[a-zA-Z]{3,4})?";
RegexOptions options = RegexOptions.Multiline;
foreach (Match m in Regex.Matches(input, pattern, options))
{
Console.WriteLine("'{0}' found at index {1}.", m.Value, m.Index);
}
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx