// // System.Net.HttpListenerRequest // // Author: // Gonzalo Paniagua Javier (gonzalo@novell.com) // // Copyright (c) 2005 Novell, Inc. (http://www.novell.com) // // Permission is hereby granted, free of charge, to any person obtaining // a copy of this software and associated documentation files (the // "Software"), to deal in the Software without restriction, including // without limitation the rights to use, copy, modify, merge, publish, // distribute, sublicense, and/or sell copies of the Software, and to // permit persons to whom the Software is furnished to do so, subject to // the following conditions: // // The above copyright notice and this permission notice shall be // included in all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. // using System.Web; using System; using System.Net; using System.Collections; using System.Collections.Specialized; using System.Globalization; using System.IO; using System.Security.Cryptography.X509Certificates; using System.Text; namespace Beagle.Daemon { public sealed class HttpListenerRequest { string [] accept_types; int client_cert_error; Encoding content_encoding; long content_length; bool cl_set; CookieCollection cookies; WebHeaderCollection headers; string method; Stream input_stream; bool is_authenticated; Version version; NameValueCollection query_string; // check if null is ok, check if read-only, check case-sensitiveness string raw_url; Guid identifier; Uri url; Uri referrer; string [] user_languages; bool no_get_certificate; HttpListenerContext context; bool is_chunked; static byte [] _100continue = Encoding.ASCII.GetBytes ("HTTP/1.1 100 Continue\r\n\r\n"); internal HttpListenerRequest (HttpListenerContext context) { this.context = context; headers = new WebHeaderCollection (); input_stream = Stream.Null; } static char [] separators = new char [] { ' ' }; // From WebRequestMethods.Http static readonly string [] methods = new string [] { "GET", "POST", "HEAD", "PUT", "CONNECT", "MKCOL" }; internal void SetRequestLine (string req) { string [] parts = req.Split (separators, 3); if (parts.Length != 3) { context.ErrorMessage = "Invalid request line (parts)."; return; } method = parts [0]; if (Array.IndexOf (methods, method) == -1) { context.ErrorMessage = "Invalid request line (verb)."; return; } raw_url = parts [1]; if (parts [2].Length != 8 || !parts [2].StartsWith ("HTTP/")) { context.ErrorMessage = "Invalid request line (version)."; return; } try { version = new Version (parts [2].Substring (5)); if (version.Major < 1) throw new Exception (); } catch { context.ErrorMessage = "Invalid request line (version)."; return; } } void CreateQueryString (string query) { query_string = new NameValueCollection (); if (query == null || query.Length == 0) return; string [] components = query.Split ('&'); foreach (string kv in components) { int pos = kv.IndexOf ('='); if (pos == -1) { query_string.Add (null, HttpUtility.UrlDecode (kv)); } else { string key = HttpUtility.UrlDecode (kv.Substring (0, pos)); string val = HttpUtility.UrlDecode (kv.Substring (pos + 1)); query_string.Add (key, val); } } } internal void FinishInitialization () { string host = UserHostName; if (version > HttpVersion.Version10 && (host == null || host == "")) { context.ErrorMessage = "Invalid host name"; return; } if (host == null || host == "") host = UserHostAddress; int colon = host.IndexOf (':'); if (colon >= 0) host = host.Substring (0, colon); string base_uri = String.Format ("{0}://{1}:{2}", (IsSecureConnection) ? "https" : "http", host, LocalEndPoint.Port); try { url = new Uri (base_uri + raw_url); } catch { context.ErrorMessage = "Invalid url"; return; } CreateQueryString (url.Query); if (method == "GET" || method == "HEAD") return; string t_encoding = null; if (version >= HttpVersion.Version11) { t_encoding = Headers ["Transfer-Encoding"]; // 'identity' is not valid! if (t_encoding != null && t_encoding != "chunked") { context.Connection.SendError (null, 501); return; } } bool is_chunked = (t_encoding == "chunked"); if (!is_chunked && !cl_set) { context.Connection.SendError (null, 411); return; } if (is_chunked || content_length > 0) { input_stream = context.Connection.GetRequestStream (is_chunked, content_length); } if (Headers ["Expect"] == "100-continue") { ResponseStream output = context.Connection.GetResponseStream (); output.InternalWrite (_100continue, 0, _100continue.Length); } } internal void AddHeader (string header) { int colon = header.IndexOf (':'); if (colon == -1 || colon == 0) { context.ErrorMessage = "Bad Request"; return; } string name = header.Substring (0, colon).Trim (); string val = header.Substring (colon + 1).Trim (); string lower = name.ToLower (CultureInfo.InvariantCulture); headers.SetInternal (name, val); switch (lower) { case "accept-language": user_languages = val.Split (','); // yes, only split with a ',' break; case "accept-types": accept_types = val.Split (','); // yes, only split with a ',' break; case "content-length": try { //TODO: max. content_length? content_length = Int64.Parse (val.Trim ()); if (content_length < 0) context.ErrorMessage = "Invalid Content-Length."; cl_set = true; } catch { context.ErrorMessage = "Invalid Content-Length."; } break; case "referer": try { referrer = new Uri (val); } catch { referrer = new Uri ("http://someone.is.screwing.with.the.headers.com/"); } break; //TODO: cookie headers } } public string [] AcceptTypes { get { return accept_types; } } public int ClientCertificateError { get { if (no_get_certificate) throw new InvalidOperationException ( "Call GetClientCertificate() before calling this method."); return client_cert_error; } } public Encoding ContentEncoding { get { if (content_encoding == null) content_encoding = Encoding.Default; return content_encoding; } } public long ContentLength64 { get { return content_length; } } public string ContentType { get { return headers ["content-type"]; } } public CookieCollection Cookies { get { // TODO: check if the collection is read-only if (cookies == null) cookies = new CookieCollection (); return cookies; } } public bool HasEntityBody { get { return (method == "GET" || method == "HEAD" || content_length <= 0 || is_chunked); } } public NameValueCollection Headers { get { return headers; } } public string HttpMethod { get { return method; } } public Stream InputStream { get { return input_stream; } } public bool IsAuthenticated { get { return is_authenticated; } } public bool IsLocal { get { return IPAddress.IsLoopback (RemoteEndPoint.Address); } } public bool IsSecureConnection { get { return context.Connection.IsSecure; } } public bool KeepAlive { get { return false; } } public IPEndPoint LocalEndPoint { get { return context.Connection.LocalEndPoint; } } public Version ProtocolVersion { get { return version; } } public NameValueCollection QueryString { get { return query_string; } } public string RawUrl { get { return raw_url; } } public IPEndPoint RemoteEndPoint { get { return context.Connection.RemoteEndPoint; } } public Guid RequestTraceIdentifier { get { return identifier; } } public Uri Url { 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 IAsyncResult BeginGetClientCertificate (AsyncCallback requestCallback, Object state) { return null; } #if SECURITY_DEP public X509Certificate2 EndGetClientCertificate (IAsyncResult asyncResult) { return null; // set no_client_certificate once done. } public X509Certificate2 GetClientCertificate () { // set no_client_certificate once done. // InvalidOp if call in progress. return null; } #endif } }