#region License Information (GPL v3)
/*
ShareX - A program that allows you to take screenshots and share any file type
Copyright (c) 2007-2019 ShareX Team
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
Optionally you can also view the license at .
*/
#endregion License Information (GPL v3)
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Web;
namespace ShareX.HelpersLib
{
public static class URLHelpers
{
public const string URLCharacters = Helpers.Alphanumeric + "-._~"; // 45 46 95 126
public const string URLPathCharacters = URLCharacters + "/"; // 47
public const string ValidURLCharacters = URLPathCharacters + ":?#[]@!$&'()*+,;= ";
public static readonly char[] BidiControlCharacters = new char[] { '\u200E', '\u200F', '\u202A', '\u202B', '\u202C', '\u202D', '\u202E' };
public static void OpenURL(string url)
{
if (!string.IsNullOrEmpty(url))
{
Task.Run(() =>
{
try
{
using (Process process = new Process())
{
ProcessStartInfo psi = new ProcessStartInfo();
if (!string.IsNullOrEmpty(HelpersOptions.BrowserPath))
{
psi.FileName = HelpersOptions.BrowserPath;
psi.Arguments = url;
}
else
{
psi.FileName = url;
}
process.StartInfo = psi;
process.Start();
}
DebugHelper.WriteLine("URL opened: " + url);
}
catch (Exception e)
{
DebugHelper.WriteException(e, $"OpenURL({url}) failed");
}
});
}
}
public static string URLEncode(string text, bool isPath = false)
{
StringBuilder sb = new StringBuilder();
if (!string.IsNullOrEmpty(text))
{
string unreservedCharacters;
if (isPath)
{
unreservedCharacters = URLPathCharacters;
}
else
{
unreservedCharacters = URLCharacters;
}
foreach (char c in Encoding.UTF8.GetBytes(text))
{
if (unreservedCharacters.IndexOf(c) != -1)
{
sb.Append(c);
}
else
{
sb.AppendFormat(CultureInfo.InvariantCulture, "%{0:X2}", (int)c);
}
}
}
return sb.ToString();
}
public static string RemoveBidiControlCharacters(string text)
{
return new string(text.Where(c => !BidiControlCharacters.Contains(c)).ToArray());
}
public static string ReplaceReservedCharacters(string text, string replace)
{
StringBuilder sb = new StringBuilder();
string last = null;
foreach (char c in text)
{
if (URLCharacters.Contains(c))
{
last = c.ToString();
}
else if (last != replace)
{
last = replace;
}
else
{
continue;
}
sb.Append(last);
}
return sb.ToString();
}
public static string HtmlEncode(string text)
{
char[] chars = HttpUtility.HtmlEncode(text).ToCharArray();
StringBuilder result = new StringBuilder(chars.Length + (int)(chars.Length * 0.1));
foreach (char c in chars)
{
int value = Convert.ToInt32(c);
if (value > 127)
{
result.AppendFormat("{0};", value);
}
else
{
result.Append(c);
}
}
return result.ToString();
}
public static string JSONEncode(string text)
{
text = JsonConvert.ToString(text);
return text.Substring(1, text.Length - 2);
}
public static string URLDecode(string url, int count = 1)
{
string temp = null;
for (int i = 0; i < count && url != temp; i++)
{
temp = url;
url = HttpUtility.UrlDecode(url);
}
return url;
}
public static string CombineURL(string url1, string url2)
{
bool url1Empty = string.IsNullOrEmpty(url1);
bool url2Empty = string.IsNullOrEmpty(url2);
if (url1Empty && url2Empty)
{
return "";
}
if (url1Empty)
{
return url2;
}
if (url2Empty)
{
return url1;
}
if (url1.EndsWith("/"))
{
url1 = url1.Substring(0, url1.Length - 1);
}
if (url2.StartsWith("/"))
{
url2 = url2.Remove(0, 1);
}
return url1 + "/" + url2;
}
public static string CombineURL(params string[] urls)
{
return urls.Aggregate(CombineURL);
}
public static bool IsValidURL(string url, bool useRegex = true)
{
if (string.IsNullOrEmpty(url)) return false;
url = url.Trim();
if (useRegex)
{
// https://gist.github.com/729294
string pattern =
"^" +
// protocol identifier
"(?:(?:https?|ftp)://)" +
// user:pass authentication
"(?:\\S+(?::\\S*)?@)?" +
"(?:" +
// IP address exclusion
// private & local networks
"(?!(?:10|127)(?:\\.\\d{1,3}){3})" +
"(?!(?:169\\.254|192\\.168)(?:\\.\\d{1,3}){2})" +
"(?!172\\.(?:1[6-9]|2\\d|3[0-1])(?:\\.\\d{1,3}){2})" +
// IP address dotted notation octets
// excludes loopback network 0.0.0.0
// excludes reserved space >= 224.0.0.0
// excludes network & broacast addresses
// (first & last IP address of each class)
"(?:[1-9]\\d?|1\\d\\d|2[01]\\d|22[0-3])" +
"(?:\\.(?:1?\\d{1,2}|2[0-4]\\d|25[0-5])){2}" +
"(?:\\.(?:[1-9]\\d?|1\\d\\d|2[0-4]\\d|25[0-4]))" +
"|" +
// host name
"(?:(?:[a-z\\u00a1-\\uffff0-9]-*)*[a-z\\u00a1-\\uffff0-9]+)" +
// domain name
"(?:\\.(?:[a-z\\u00a1-\\uffff0-9]-*)*[a-z\\u00a1-\\uffff0-9]+)*" +
// TLD identifier
"(?:\\.(?:[a-z\\u00a1-\\uffff]{2,}))" +
// TLD may end with dot
"\\.?" +
")" +
// port number
"(?::\\d{2,5})?" +
// resource path
"(?:[/?#]\\S*)?" +
"$";
return Regex.IsMatch(url, pattern, RegexOptions.IgnoreCase);
}
return !url.StartsWith("file://") && Uri.IsWellFormedUriString(url, UriKind.Absolute);
}
public static string AddSlash(string url, SlashType slashType)
{
return AddSlash(url, slashType, 1);
}
public static string AddSlash(string url, SlashType slashType, int count)
{
if (slashType == SlashType.Prefix)
{
if (url.StartsWith("/"))
{
url = url.Remove(0, 1);
}
for (int i = 0; i < count; i++)
{
url = "/" + url;
}
}
else
{
if (url.EndsWith("/"))
{
url = url.Substring(0, url.Length - 1);
}
for (int i = 0; i < count; i++)
{
url += "/";
}
}
return url;
}
public static string GetFileName(string path)
{
if (path.Contains('/'))
{
path = path.Substring(path.LastIndexOf('/') + 1);
}
if (path.Contains('?'))
{
path = path.Remove(path.IndexOf('?'));
}
if (path.Contains('#'))
{
path = path.Remove(path.IndexOf('#'));
}
return path;
}
public static bool IsFileURL(string url)
{
int index = url.LastIndexOf('/');
if (index < 0)
{
return false;
}
string path = url.Substring(index + 1);
return !string.IsNullOrEmpty(path) && path.Contains(".");
}
public static string GetDirectoryPath(string path)
{
if (path.Contains("/"))
{
path = path.Substring(0, path.LastIndexOf('/'));
}
return path;
}
public static List GetPaths(string path)
{
List paths = new List();
for (int i = 0; i < path.Length; i++)
{
if (path[i] == '/')
{
string currentPath = path.Remove(i);
if (!string.IsNullOrEmpty(currentPath))
{
paths.Add(currentPath);
}
}
else if (i == path.Length - 1)
{
paths.Add(path);
}
}
return paths;
}
private static readonly string[] URLPrefixes = new string[] { "http://", "https://", "ftp://", "ftps://", "file://", "//" };
public static bool HasPrefix(string url)
{
return URLPrefixes.Any(x => url.StartsWith(x, StringComparison.InvariantCultureIgnoreCase));
}
public static string FixPrefix(string url, string prefix = "http://")
{
if (!string.IsNullOrEmpty(url) && !HasPrefix(url))
{
return prefix + url;
}
return url;
}
public static string ForcePrefix(string url, string prefix = "https://")
{
if (!string.IsNullOrEmpty(url))
{
url = prefix + RemovePrefixes(url);
}
return url;
}
public static string RemovePrefixes(string url)
{
foreach (string prefix in URLPrefixes)
{
if (url.StartsWith(prefix, StringComparison.InvariantCultureIgnoreCase))
{
url = url.Remove(0, prefix.Length);
break;
}
}
return url;
}
public static string GetHostName(string url)
{
if (!string.IsNullOrEmpty(url) && Uri.TryCreate(url, UriKind.Absolute, out Uri uri))
{
string host = uri.Host;
if (!string.IsNullOrEmpty(host))
{
if (host.StartsWith("www.", StringComparison.InvariantCultureIgnoreCase))
{
host = host.Substring(4);
}
return host;
}
}
return url;
}
public static string CreateQuery(Dictionary args, bool customEncoding = false)
{
if (args != null && args.Count > 0)
{
return string.Join("&", args.Select(x => x.Key + "=" + (customEncoding ? URLEncode(x.Value) : HttpUtility.UrlEncode(x.Value))).ToArray());
}
return "";
}
public static string CreateQuery(string url, Dictionary args, bool customEncoding = false)
{
string query = CreateQuery(args, customEncoding);
if (!string.IsNullOrEmpty(query))
{
return url + "?" + query;
}
return url;
}
public static string RemoveQuery(string url)
{
if (!string.IsNullOrEmpty(url))
{
int index = url.IndexOf("?");
if (index > -1)
{
return url.Remove(index);
}
}
return url;
}
public static string BuildUri(string root, string path, string query = null)
{
UriBuilder builder = new UriBuilder(root);
builder.Path = path;
builder.Query = query;
return builder.Uri.AbsoluteUri;
}
}
}