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using System;
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using System.Collections.Generic;
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using System.Collections.Specialized;
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using System.Linq;
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using System.Text;
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using System.Text.RegularExpressions;
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using NzbDrone.Common.Extensions;
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namespace NzbDrone.Common.Http
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{
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public class HttpUri : IEquatable<HttpUri>
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{
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private static readonly Regex RegexUri = new Regex(@"^(?:(?<scheme>[a-z]+):)?(?://(?<host>[-A-Z0-9.]+)(?::(?<port>[0-9]{1,5}))?)?(?<path>(?:(?:(?<=^)|/)[^/?#\r\n]+)+/?|/)?(?:\?(?<query>[^#\r\n]*))?(?:\#(?<fragment>.*))?$", RegexOptions.Compiled | RegexOptions.IgnoreCase);
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private readonly string _uri;
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public string FullUri { get { return _uri; } }
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public HttpUri(string uri)
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{
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_uri = uri ?? string.Empty;
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Parse();
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}
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public HttpUri(string scheme, string host, int? port, string path, string query, string fragment)
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{
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StringBuilder builder = new StringBuilder();
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if (scheme.IsNotNullOrWhiteSpace())
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{
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builder.Append(scheme);
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builder.Append(":");
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}
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if (host.IsNotNullOrWhiteSpace())
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{
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builder.Append("//");
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builder.Append(host);
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if (port.HasValue)
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{
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builder.Append(":");
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builder.Append(port);
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}
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}
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if (path.IsNotNullOrWhiteSpace())
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{
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if (host.IsNotNullOrWhiteSpace() || path.StartsWith("/"))
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{
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builder.Append('/');
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}
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builder.Append(path.TrimStart('/'));
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}
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if (query.IsNotNullOrWhiteSpace())
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{
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builder.Append('?');
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builder.Append(query);
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}
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if (fragment.IsNotNullOrWhiteSpace())
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{
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builder.Append('#');
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builder.Append(fragment);
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}
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_uri = builder.ToString();
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Parse();
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}
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private void Parse()
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{
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var match = RegexUri.Match(_uri);
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var scheme = match.Groups["scheme"];
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var host = match.Groups["host"];
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var port = match.Groups["port"];
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var path = match.Groups["path"];
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var query = match.Groups["query"];
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var fragment = match.Groups["fragment"];
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if (!match.Success || scheme.Success && !host.Success && path.Success)
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{
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throw new ArgumentException("Uri didn't match expected pattern: " + _uri);
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}
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Scheme = scheme.Value;
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Host = host.Value;
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Port = port.Success ? (int?)int.Parse(port.Value) : null;
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Path = path.Value;
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Query = query.Value;
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Fragment = fragment.Value;
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}
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public string Scheme { get; private set; }
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public string Host { get; private set; }
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public int? Port { get; private set; }
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public string Path { get; private set; }
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public string Query { get; private set; }
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public string Fragment { get; private set; }
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private IList<KeyValuePair<string, string>> _queryParams;
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private IList<KeyValuePair<string, string>> QueryParams
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{
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get
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{
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if (_queryParams == null)
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{
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var dict = new List<KeyValuePair<string, string>>();
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if (Query.IsNotNullOrWhiteSpace())
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{
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foreach (var pair in Query.Split('&'))
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{
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var split = pair.Split(new[] { '=' }, 2);
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if (split.Length == 1)
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{
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dict.Add(new KeyValuePair<string, string>(Uri.UnescapeDataString(split[0]), null));
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}
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else
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{
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dict.Add(new KeyValuePair<string, string>(Uri.UnescapeDataString(split[0]), Uri.UnescapeDataString(split[1])));
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}
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}
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}
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_queryParams = dict.AsReadOnly();
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}
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return _queryParams;
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}
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}
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public HttpUri CombinePath(string path)
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{
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return new HttpUri(Scheme, Host, Port, CombinePath(Path, path), Query, Fragment);
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}
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private static string CombinePath(string basePath, string relativePath)
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{
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if (relativePath.IsNullOrWhiteSpace())
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{
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return basePath;
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}
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var newPath = "/" + relativePath.TrimStart('/');
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if (basePath != null && !relativePath.StartsWith("/"))
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{
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var baseSlashIndex = basePath.LastIndexOf('/');
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if (baseSlashIndex == basePath.Length - 1)
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{
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newPath = basePath.TrimEnd('/') + newPath;
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}
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else if (baseSlashIndex != 0)
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{
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newPath = basePath.Substring(0, baseSlashIndex) + newPath;
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}
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}
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return newPath;
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}
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public HttpUri SetQuery(string query)
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{
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return new HttpUri(Scheme, Host, Port, Path, query, Fragment);
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}
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public HttpUri AddQueryParam(string key, object value)
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{
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var newQuery = string.Concat(Uri.EscapeDataString(key), "=", Uri.EscapeDataString(value.ToString()));
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if (Query.IsNotNullOrWhiteSpace())
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{
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newQuery = string.Concat(Query, "&", newQuery);
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}
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return SetQuery(newQuery);
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}
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public HttpUri AddQueryParams(IEnumerable<KeyValuePair<string, string>> queryParams)
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{
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var builder = new StringBuilder();
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builder.Append(Query);
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foreach (var pair in queryParams)
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{
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if (builder.Length != 0)
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{
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builder.Append("&");
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}
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builder.Append(Uri.EscapeDataString(pair.Key));
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builder.Append("=");
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builder.Append(Uri.EscapeDataString(pair.Value));
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}
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return SetQuery(builder.ToString());
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}
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public override int GetHashCode()
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{
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return _uri.GetHashCode();
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}
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public override string ToString()
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{
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return _uri;
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}
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public override bool Equals(object obj)
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{
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if (obj is string)
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{
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return _uri.Equals((string)obj);
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}
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else if (obj is Uri)
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{
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return _uri.Equals(((Uri)obj).OriginalString);
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}
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else
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{
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return Equals(obj as HttpUri);
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}
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}
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public bool Equals(HttpUri other)
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{
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if (object.ReferenceEquals(other, null)) return false;
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return _uri.Equals(other._uri);
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}
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public static explicit operator Uri(HttpUri url)
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{
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return new Uri(url.FullUri);
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}
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public static HttpUri operator +(HttpUri baseUrl, HttpUri relativeUrl)
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{
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if (relativeUrl.Scheme.IsNotNullOrWhiteSpace())
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{
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return relativeUrl;
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}
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if (relativeUrl.Host.IsNotNullOrWhiteSpace())
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{
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return new HttpUri(baseUrl.Scheme, relativeUrl.Host, relativeUrl.Port, relativeUrl.Path, relativeUrl.Query, relativeUrl.Fragment);
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}
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if (relativeUrl.Path.IsNotNullOrWhiteSpace())
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{
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return new HttpUri(baseUrl.Scheme, baseUrl.Host, baseUrl.Port, HttpUri.CombinePath(baseUrl.Path, relativeUrl.Path), relativeUrl.Query, relativeUrl.Fragment);
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}
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return new HttpUri(baseUrl.Scheme, baseUrl.Host, baseUrl.Port, baseUrl.Path, relativeUrl.Query, relativeUrl.Fragment);
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}
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}
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}
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Taloth Saldono
8 years ago