664 lines
21 KiB
C#
664 lines
21 KiB
C#
using System;
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using System.Collections.Specialized;
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using System.Globalization;
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using System.IO;
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using System.Net;
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using System.Security.Cryptography.X509Certificates;
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using System.Text;
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using System.Threading.Tasks;
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using MediaBrowser.Model.Net;
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using MediaBrowser.Model.Services;
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using MediaBrowser.Model.Text;
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using SocketHttpListener.Primitives;
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namespace SocketHttpListener.Net
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{
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public sealed class HttpListenerRequest
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{
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string[] accept_types;
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Encoding content_encoding;
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long content_length;
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bool cl_set;
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CookieCollection cookies;
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WebHeaderCollection headers;
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string method;
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Stream input_stream;
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Version version;
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QueryParamCollection query_string; // check if null is ok, check if read-only, check case-sensitiveness
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string raw_url;
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Uri url;
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Uri referrer;
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string[] user_languages;
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HttpListenerContext context;
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bool is_chunked;
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bool ka_set;
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bool? _keepAlive;
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private readonly ITextEncoding _textEncoding;
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internal HttpListenerRequest(HttpListenerContext context, ITextEncoding textEncoding)
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{
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this.context = context;
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_textEncoding = textEncoding;
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headers = new WebHeaderCollection();
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version = HttpVersion.Version10;
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}
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static char[] separators = new char[] { ' ' };
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internal void SetRequestLine(string req)
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{
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string[] parts = req.Split(separators, 3);
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if (parts.Length != 3)
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{
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context.ErrorMessage = "Invalid request line (parts).";
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return;
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}
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method = parts[0];
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foreach (char c in method)
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{
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int ic = (int)c;
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if ((ic >= 'A' && ic <= 'Z') ||
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(ic > 32 && c < 127 && c != '(' && c != ')' && c != '<' &&
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c != '<' && c != '>' && c != '@' && c != ',' && c != ';' &&
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c != ':' && c != '\\' && c != '"' && c != '/' && c != '[' &&
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c != ']' && c != '?' && c != '=' && c != '{' && c != '}'))
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continue;
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context.ErrorMessage = "(Invalid verb)";
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return;
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}
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raw_url = parts[1];
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if (parts[2].Length != 8 || !parts[2].StartsWith("HTTP/"))
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{
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context.ErrorMessage = "Invalid request line (version).";
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return;
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}
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try
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{
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version = new Version(parts[2].Substring(5));
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if (version.Major < 1)
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throw new Exception();
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}
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catch
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{
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context.ErrorMessage = "Invalid request line (version).";
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return;
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}
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}
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void CreateQueryString(string query)
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{
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if (query == null || query.Length == 0)
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{
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query_string = new QueryParamCollection();
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return;
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}
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query_string = new QueryParamCollection();
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if (query[0] == '?')
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query = query.Substring(1);
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string[] components = query.Split('&');
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foreach (string kv in components)
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{
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int pos = kv.IndexOf('=');
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if (pos == -1)
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{
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query_string.Add(null, WebUtility.UrlDecode(kv));
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}
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else
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{
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string key = WebUtility.UrlDecode(kv.Substring(0, pos));
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string val = WebUtility.UrlDecode(kv.Substring(pos + 1));
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query_string.Add(key, val);
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}
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}
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}
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internal void FinishInitialization()
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{
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string host = UserHostName;
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if (version > HttpVersion.Version10 && (host == null || host.Length == 0))
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{
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context.ErrorMessage = "Invalid host name";
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return;
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}
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string path;
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Uri raw_uri = null;
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if (MaybeUri(raw_url.ToLowerInvariant()) && Uri.TryCreate(raw_url, UriKind.Absolute, out raw_uri))
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path = raw_uri.PathAndQuery;
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else
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path = raw_url;
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if ((host == null || host.Length == 0))
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host = UserHostAddress;
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if (raw_uri != null)
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host = raw_uri.Host;
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int colon = host.LastIndexOf(':');
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if (colon >= 0)
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host = host.Substring(0, colon);
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string base_uri = String.Format("{0}://{1}:{2}",
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(IsSecureConnection) ? (IsWebSocketRequest ? "wss" : "https") : (IsWebSocketRequest ? "ws" : "http"),
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host, LocalEndPoint.Port);
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if (!Uri.TryCreate(base_uri + path, UriKind.Absolute, out url))
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{
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context.ErrorMessage = WebUtility.HtmlEncode("Invalid url: " + base_uri + path);
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return; return;
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}
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CreateQueryString(url.Query);
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if (version >= HttpVersion.Version11)
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{
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string t_encoding = Headers["Transfer-Encoding"];
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is_chunked = (t_encoding != null && String.Compare(t_encoding, "chunked", StringComparison.OrdinalIgnoreCase) == 0);
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// 'identity' is not valid!
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if (t_encoding != null && !is_chunked)
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{
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context.Connection.SendError(null, 501);
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return;
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}
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}
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if (!is_chunked && !cl_set)
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{
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if (String.Compare(method, "POST", StringComparison.OrdinalIgnoreCase) == 0 ||
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String.Compare(method, "PUT", StringComparison.OrdinalIgnoreCase) == 0)
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{
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context.Connection.SendError(null, 411);
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return;
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}
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}
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if (String.Compare(Headers["Expect"], "100-continue", StringComparison.OrdinalIgnoreCase) == 0)
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{
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var output = (HttpResponseStream)context.Connection.GetResponseStream(true);
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var _100continue = _textEncoding.GetASCIIEncoding().GetBytes("HTTP/1.1 100 Continue\r\n\r\n");
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output.InternalWrite(_100continue, 0, _100continue.Length);
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}
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}
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static bool MaybeUri(string s)
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{
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int p = s.IndexOf(':');
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if (p == -1)
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return false;
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if (p >= 10)
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return false;
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return IsPredefinedScheme(s.Substring(0, p));
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}
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//
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// Using a simple block of if's is twice as slow as the compiler generated
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// switch statement. But using this tuned code is faster than the
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// compiler generated code, with a million loops on x86-64:
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//
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// With "http": .10 vs .51 (first check)
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// with "https": .16 vs .51 (second check)
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// with "foo": .22 vs .31 (never found)
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// with "mailto": .12 vs .51 (last check)
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//
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//
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static bool IsPredefinedScheme(string scheme)
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{
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if (scheme == null || scheme.Length < 3)
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return false;
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char c = scheme[0];
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if (c == 'h')
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return (scheme == "http" || scheme == "https");
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if (c == 'f')
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return (scheme == "file" || scheme == "ftp");
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if (c == 'n')
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{
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c = scheme[1];
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if (c == 'e')
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return (scheme == "news" || scheme == "net.pipe" || scheme == "net.tcp");
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if (scheme == "nntp")
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return true;
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return false;
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}
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if ((c == 'g' && scheme == "gopher") || (c == 'm' && scheme == "mailto"))
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return true;
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return false;
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}
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internal static string Unquote(String str)
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{
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int start = str.IndexOf('\"');
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int end = str.LastIndexOf('\"');
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if (start >= 0 && end >= 0)
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str = str.Substring(start + 1, end - 1);
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return str.Trim();
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}
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internal void AddHeader(string header)
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{
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int colon = header.IndexOf(':');
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if (colon == -1 || colon == 0)
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{
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context.ErrorMessage = "Bad Request";
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context.ErrorStatus = 400;
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return;
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}
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string name = header.Substring(0, colon).Trim();
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string val = header.Substring(colon + 1).Trim();
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string lower = name.ToLowerInvariant();
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headers.SetInternal(name, val);
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switch (lower)
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{
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case "accept-language":
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user_languages = val.Split(','); // yes, only split with a ','
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break;
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case "accept":
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accept_types = val.Split(','); // yes, only split with a ','
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break;
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case "content-length":
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try
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{
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//TODO: max. content_length?
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content_length = Int64.Parse(val.Trim());
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if (content_length < 0)
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context.ErrorMessage = "Invalid Content-Length.";
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cl_set = true;
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}
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catch
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{
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context.ErrorMessage = "Invalid Content-Length.";
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}
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break;
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case "content-type":
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{
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var contents = val.Split(';');
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foreach (var content in contents)
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{
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var tmp = content.Trim();
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if (tmp.StartsWith("charset"))
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{
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var charset = tmp.GetValue("=");
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if (charset != null && charset.Length > 0)
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{
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try
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{
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// Support upnp/dlna devices - CONTENT-TYPE: text/xml ; charset="utf-8"\r\n
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charset = charset.Trim('"');
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var index = charset.IndexOf('"');
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if (index != -1) charset = charset.Substring(0, index);
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content_encoding = Encoding.GetEncoding(charset);
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}
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catch
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{
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context.ErrorMessage = "Invalid Content-Type header: " + charset;
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}
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}
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break;
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}
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}
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}
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break;
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case "referer":
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try
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{
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referrer = new Uri(val);
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}
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catch
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{
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referrer = new Uri("http://someone.is.screwing.with.the.headers.com/");
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}
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break;
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case "cookie":
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if (cookies == null)
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cookies = new CookieCollection();
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string[] cookieStrings = val.Split(new char[] { ',', ';' });
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Cookie current = null;
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int version = 0;
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foreach (string cookieString in cookieStrings)
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{
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string str = cookieString.Trim();
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if (str.Length == 0)
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continue;
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if (str.StartsWith("$Version"))
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{
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version = Int32.Parse(Unquote(str.Substring(str.IndexOf('=') + 1)));
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}
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else if (str.StartsWith("$Path"))
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{
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if (current != null)
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current.Path = str.Substring(str.IndexOf('=') + 1).Trim();
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}
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else if (str.StartsWith("$Domain"))
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{
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if (current != null)
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current.Domain = str.Substring(str.IndexOf('=') + 1).Trim();
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}
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else if (str.StartsWith("$Port"))
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{
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if (current != null)
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current.Port = str.Substring(str.IndexOf('=') + 1).Trim();
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}
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else
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{
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if (current != null)
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{
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cookies.Add(current);
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}
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current = new Cookie();
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int idx = str.IndexOf('=');
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if (idx > 0)
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{
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current.Name = str.Substring(0, idx).Trim();
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current.Value = str.Substring(idx + 1).Trim();
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}
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else
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{
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current.Name = str.Trim();
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current.Value = String.Empty;
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}
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current.Version = version;
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}
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}
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if (current != null)
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{
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cookies.Add(current);
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}
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break;
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}
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}
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// returns true is the stream could be reused.
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internal bool FlushInput()
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{
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if (!HasEntityBody)
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return true;
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int length = 2048;
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if (content_length > 0)
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length = (int)Math.Min(content_length, (long)length);
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byte[] bytes = new byte[length];
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while (true)
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{
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// TODO: test if MS has a timeout when doing this
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try
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{
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var task = InputStream.ReadAsync(bytes, 0, length);
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var result = Task.WaitAll(new [] { task }, 1000);
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if (!result)
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{
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return false;
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}
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if (task.Result <= 0)
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{
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return true;
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}
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}
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catch (ObjectDisposedException e)
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{
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input_stream = null;
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return true;
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}
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catch
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{
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return false;
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}
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}
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}
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public string[] AcceptTypes
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{
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get { return accept_types; }
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}
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public int ClientCertificateError
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{
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get
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{
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HttpConnection cnc = context.Connection;
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//if (cnc.ClientCertificate == null)
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// throw new InvalidOperationException("No client certificate");
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//int[] errors = cnc.ClientCertificateErrors;
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//if (errors != null && errors.Length > 0)
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// return errors[0];
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return 0;
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}
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}
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public Encoding ContentEncoding
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{
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get
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{
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if (content_encoding == null)
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content_encoding = _textEncoding.GetDefaultEncoding();
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return content_encoding;
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}
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}
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public long ContentLength64
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{
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get { return is_chunked ? -1 : content_length; }
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}
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public string ContentType
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{
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get { return headers["content-type"]; }
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}
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public CookieCollection Cookies
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{
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get
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{
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// TODO: check if the collection is read-only
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if (cookies == null)
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cookies = new CookieCollection();
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return cookies;
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}
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}
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public bool HasEntityBody
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{
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get { return (content_length > 0 || is_chunked); }
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}
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public QueryParamCollection Headers
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{
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get { return headers; }
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}
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public string HttpMethod
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{
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get { return method; }
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}
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public Stream InputStream
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{
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get
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{
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if (input_stream == null)
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{
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if (is_chunked || content_length > 0)
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input_stream = context.Connection.GetRequestStream(is_chunked, content_length);
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else
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input_stream = Stream.Null;
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}
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return input_stream;
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}
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}
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public bool IsAuthenticated
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{
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get { return false; }
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}
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public bool IsLocal
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{
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get
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|
{
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var remoteEndPoint = RemoteEndPoint;
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return remoteEndPoint.Address.Equals(IPAddress.Loopback) ||
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remoteEndPoint.Address.Equals(IPAddress.IPv6Loopback) ||
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LocalEndPoint.Address.Equals(remoteEndPoint.Address);
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}
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}
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|
|
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public bool IsSecureConnection
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{
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get { return context.Connection.IsSecure; }
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}
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|
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public bool KeepAlive
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{
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get
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|
{
|
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if (!_keepAlive.HasValue)
|
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{
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string header = Headers["Proxy-Connection"];
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if (string.IsNullOrEmpty(header))
|
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{
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header = Headers["Connection"];
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}
|
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if (string.IsNullOrEmpty(header))
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{
|
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if (ProtocolVersion >= HttpVersion.Version11)
|
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{
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_keepAlive = true;
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}
|
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else
|
|
{
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header = Headers["Keep-Alive"];
|
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_keepAlive = !string.IsNullOrEmpty(header);
|
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}
|
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}
|
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else
|
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{
|
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header = header.ToLower(CultureInfo.InvariantCulture);
|
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_keepAlive =
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header.IndexOf("close", StringComparison.OrdinalIgnoreCase) < 0 ||
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header.IndexOf("keep-alive", StringComparison.OrdinalIgnoreCase) >= 0;
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}
|
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}
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|
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return _keepAlive.Value;
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}
|
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}
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|
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public IPEndPoint LocalEndPoint
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|
{
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|
get { return context.Connection.LocalEndPoint; }
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}
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|
|
|
public Version ProtocolVersion
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|
{
|
|
get { return version; }
|
|
}
|
|
|
|
public QueryParamCollection QueryString
|
|
{
|
|
get { return query_string; }
|
|
}
|
|
|
|
public string RawUrl
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|
{
|
|
get { return raw_url; }
|
|
}
|
|
|
|
public IPEndPoint RemoteEndPoint
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|
{
|
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get { return context.Connection.RemoteEndPoint; }
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|
}
|
|
|
|
public Guid RequestTraceIdentifier
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|
{
|
|
get { return Guid.Empty; }
|
|
}
|
|
|
|
public Uri Url
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|
{
|
|
get { return url; }
|
|
}
|
|
|
|
public Uri UrlReferrer
|
|
{
|
|
get { return referrer; }
|
|
}
|
|
|
|
public string UserAgent
|
|
{
|
|
get { return headers["user-agent"]; }
|
|
}
|
|
|
|
public string UserHostAddress
|
|
{
|
|
get { return LocalEndPoint.ToString(); }
|
|
}
|
|
|
|
public string UserHostName
|
|
{
|
|
get { return headers["host"]; }
|
|
}
|
|
|
|
public string[] UserLanguages
|
|
{
|
|
get { return user_languages; }
|
|
}
|
|
|
|
public string ServiceName
|
|
{
|
|
get
|
|
{
|
|
return null;
|
|
}
|
|
}
|
|
|
|
private bool _websocketRequestWasSet;
|
|
private bool _websocketRequest;
|
|
|
|
/// <summary>
|
|
/// Gets a value indicating whether the request is a WebSocket connection request.
|
|
/// </summary>
|
|
/// <value>
|
|
/// <c>true</c> if the request is a WebSocket connection request; otherwise, <c>false</c>.
|
|
/// </value>
|
|
public bool IsWebSocketRequest
|
|
{
|
|
get
|
|
{
|
|
if (!_websocketRequestWasSet)
|
|
{
|
|
_websocketRequest = method == "GET" &&
|
|
version > HttpVersion.Version10 &&
|
|
headers.Contains("Upgrade", "websocket") &&
|
|
headers.Contains("Connection", "Upgrade");
|
|
|
|
_websocketRequestWasSet = true;
|
|
}
|
|
|
|
return _websocketRequest;
|
|
}
|
|
}
|
|
}
|
|
}
|