504 lines
15 KiB
C#
504 lines
15 KiB
C#
//
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// HttpRequestChannel.cs
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//
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// Author:
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// Atsushi Enomoto <atsushi@ximian.com>
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//
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// Copyright (C) 2006 Novell, Inc. http://www.novell.com
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Net;
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using System.Net.Security;
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using System.ServiceModel;
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using System.ServiceModel.Description;
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using System.ServiceModel.Security;
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using System.Threading;
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namespace System.ServiceModel.Channels
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{
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internal class HttpRequestChannel : RequestChannelBase
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{
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HttpChannelFactory<IRequestChannel> source;
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List<WebRequest> web_requests = new List<WebRequest> ();
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// Constructor
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public HttpRequestChannel (HttpChannelFactory<IRequestChannel> factory,
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EndpointAddress address, Uri via)
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: base (factory, address, via)
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{
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this.source = factory;
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}
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public MessageEncoder Encoder {
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get { return source.MessageEncoder; }
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}
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#if NET_2_1
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public override T GetProperty<T> ()
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{
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if (typeof (T) == typeof (IHttpCookieContainerManager))
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return source.GetProperty<T> ();
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return base.GetProperty<T> ();
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}
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#endif
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// Request
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public override Message Request (Message message, TimeSpan timeout)
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{
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return EndRequest (BeginRequest (message, timeout, null, null));
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}
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void BeginProcessRequest (HttpChannelRequestAsyncResult result)
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{
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Message message = result.Message;
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TimeSpan timeout = result.Timeout;
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// FIXME: is distination really like this?
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Uri destination = message.Headers.To;
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if (destination == null) {
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if (source.Transport.ManualAddressing)
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throw new InvalidOperationException ("When manual addressing is enabled on the transport, every request messages must be set its destination address.");
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else
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destination = Via ?? RemoteAddress.Uri;
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}
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var web_request = (HttpWebRequest) HttpWebRequest.Create (destination);
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web_requests.Add (web_request);
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result.WebRequest = web_request;
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web_request.Method = "POST";
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web_request.ContentType = Encoder.ContentType;
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HttpWebRequest hwr = (web_request as HttpWebRequest);
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var cmgr = source.GetProperty<IHttpCookieContainerManager> ();
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if (cmgr != null)
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hwr.CookieContainer = cmgr.CookieContainer;
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// client authentication (while SL3 has NetworkCredential class, it is not implemented yet. So, it is non-SL only.)
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var httpbe = (HttpTransportBindingElement) source.Transport;
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string authType = null;
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switch (httpbe.AuthenticationScheme) {
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// AuthenticationSchemes.Anonymous is the default, ignored.
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case AuthenticationSchemes.Basic:
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authType = "Basic";
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break;
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case AuthenticationSchemes.Digest:
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authType = "Digest";
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break;
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case AuthenticationSchemes.Ntlm:
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authType = "Ntlm";
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break;
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case AuthenticationSchemes.Negotiate:
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authType = "Negotiate";
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break;
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}
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if (authType != null) {
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var cred = source.ClientCredentials;
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string user = cred != null ? cred.UserName.UserName : null;
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string pwd = cred != null ? cred.UserName.Password : null;
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if (String.IsNullOrEmpty (user))
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throw new InvalidOperationException (String.Format ("Use ClientCredentials to specify a user name for required HTTP {0} authentication.", authType));
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var nc = new NetworkCredential (user, pwd);
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web_request.Credentials = nc;
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// FIXME: it is said required in SL4, but it blocks full WCF.
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//web_request.UseDefaultCredentials = false;
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}
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web_request.Timeout = (int) timeout.TotalMilliseconds;
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// There is no SOAP Action/To header when AddressingVersion is None.
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if (message.Version.Envelope.Equals (EnvelopeVersion.Soap11) ||
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message.Version.Addressing.Equals (AddressingVersion.None)) {
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if (message.Headers.Action != null) {
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web_request.Headers ["SOAPAction"] = String.Concat ("\"", message.Headers.Action, "\"");
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message.Headers.RemoveAll ("Action", message.Version.Addressing.Namespace);
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}
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}
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// apply HttpRequestMessageProperty if exists.
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bool suppressEntityBody = false;
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string pname = HttpRequestMessageProperty.Name;
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if (message.Properties.ContainsKey (pname)) {
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HttpRequestMessageProperty hp = (HttpRequestMessageProperty) message.Properties [pname];
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foreach (var key in hp.Headers.AllKeys) {
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if (WebHeaderCollection.IsRestricted (key)) { // do not ignore this. WebHeaderCollection rejects restricted ones.
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// FIXME: huh, there should be any better way to do such stupid conversion.
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switch (key) {
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case "Accept":
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web_request.Accept = hp.Headers [key];
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break;
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case "Connection":
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web_request.Connection = hp.Headers [key];
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break;
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//case "ContentLength":
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// web_request.ContentLength = hp.Headers [key];
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// break;
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case "ContentType":
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web_request.ContentType = hp.Headers [key];
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break;
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//case "Date":
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// web_request.Date = hp.Headers [key];
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// break;
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case "Expect":
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web_request.Expect = hp.Headers [key];
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break;
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case "Host":
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web_request.Host = hp.Headers [key];
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break;
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//case "If-Modified-Since":
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// web_request.IfModifiedSince = hp.Headers [key];
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// break;
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case "Referer":
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web_request.Referer = hp.Headers [key];
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break;
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case "Transfer-Encoding":
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web_request.TransferEncoding = hp.Headers [key];
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break;
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case "User-Agent":
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web_request.UserAgent = hp.Headers [key];
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break;
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}
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}
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else
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web_request.Headers [key] = hp.Headers [key];
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}
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web_request.Method = hp.Method;
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// FIXME: do we have to handle hp.QueryString ?
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if (hp.SuppressEntityBody)
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suppressEntityBody = true;
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}
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#if !NET_2_1
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if (source.ClientCredentials != null) {
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var cred = source.ClientCredentials;
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if ((cred.ClientCertificate != null) && (cred.ClientCertificate.Certificate != null))
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((HttpWebRequest)web_request).ClientCertificates.Add (cred.ClientCertificate.Certificate);
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}
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#endif
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if (!suppressEntityBody && String.Compare (web_request.Method, "GET", StringComparison.OrdinalIgnoreCase) != 0) {
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MemoryStream buffer = new MemoryStream ();
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Encoder.WriteMessage (message, buffer);
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if (buffer.Length > int.MaxValue)
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throw new InvalidOperationException ("The argument message is too large.");
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web_request.ContentLength = (int) buffer.Length;
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web_request.BeginGetRequestStream (delegate (IAsyncResult r) {
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try {
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result.CompletedSynchronously &= r.CompletedSynchronously;
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using (Stream s = web_request.EndGetRequestStream (r))
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s.Write (buffer.GetBuffer (), 0, (int) buffer.Length);
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web_request.BeginGetResponse (GotResponse, result);
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} catch (WebException ex) {
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switch (ex.Status) {
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case WebExceptionStatus.NameResolutionFailure:
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case WebExceptionStatus.ConnectFailure:
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result.Complete (new EndpointNotFoundException (new EndpointNotFoundException ().Message, ex));
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break;
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default:
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result.Complete (ex);
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break;
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}
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} catch (Exception ex) {
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result.Complete (ex);
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}
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}, null);
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} else {
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web_request.BeginGetResponse (GotResponse, result);
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}
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}
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void GotResponse (IAsyncResult result)
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{
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HttpChannelRequestAsyncResult channelResult = (HttpChannelRequestAsyncResult) result.AsyncState;
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channelResult.CompletedSynchronously &= result.CompletedSynchronously;
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WebResponse res;
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Stream resstr;
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try {
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res = channelResult.WebRequest.EndGetResponse (result);
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resstr = res.GetResponseStream ();
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} catch (WebException we) {
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res = we.Response;
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if (res == null) {
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channelResult.Complete (we);
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return;
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}
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var hrr2 = (HttpWebResponse) res;
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if ((int) hrr2.StatusCode >= 400 && (int) hrr2.StatusCode < 500) {
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Exception exception = new WebException (
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String.Format ("There was an error on processing web request: Status code {0}({1}): {2}",
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(int) hrr2.StatusCode, hrr2.StatusCode, hrr2.StatusDescription), null,
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WebExceptionStatus.ProtocolError, hrr2);
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if ((int) hrr2.StatusCode == 404) {
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// Throw the same exception .NET does
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exception = new EndpointNotFoundException (
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"There was no endpoint listening at {0} that could accept the message. This is often caused by an incorrect address " +
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"or SOAP action. See InnerException, if present, for more details.",
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exception);
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}
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channelResult.Complete (exception);
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return;
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}
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try {
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// The response might contain SOAP fault. It might not.
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resstr = res.GetResponseStream ();
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} catch (WebException we2) {
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channelResult.Complete (we2);
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return;
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}
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}
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var hrr = (HttpWebResponse) res;
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if ((int) hrr.StatusCode >= 400 && (int) hrr.StatusCode < 500) {
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channelResult.Complete (new WebException (String.Format ("There was an error on processing web request: Status code {0}({1}): {2}", (int) hrr.StatusCode, hrr.StatusCode, hrr.StatusDescription)));
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}
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try {
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Message ret;
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// TODO: unit test to make sure an empty response never throws
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// an exception at this level
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if (hrr.ContentLength == 0) {
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ret = Message.CreateMessage (Encoder.MessageVersion, String.Empty);
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} else {
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using (var responseStream = resstr) {
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MemoryStream ms = new MemoryStream ();
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byte [] b = new byte [65536];
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int n = 0;
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while (true) {
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n = responseStream.Read (b, 0, 65536);
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if (n == 0)
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break;
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ms.Write (b, 0, n);
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}
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ms.Seek (0, SeekOrigin.Begin);
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ret = Encoder.ReadMessage (
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ms, (int) source.Transport.MaxReceivedMessageSize, res.ContentType);
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}
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}
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var rp = new HttpResponseMessageProperty () { StatusCode = hrr.StatusCode, StatusDescription = hrr.StatusDescription };
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foreach (var key in hrr.Headers.AllKeys)
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rp.Headers [key] = hrr.Headers [key];
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ret.Properties.Add (HttpResponseMessageProperty.Name, rp);
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channelResult.Response = ret;
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channelResult.Complete ();
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} catch (Exception ex) {
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channelResult.Complete (ex);
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} finally {
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res.Close ();
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}
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}
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public override IAsyncResult BeginRequest (Message message, TimeSpan timeout, AsyncCallback callback, object state)
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{
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ThrowIfDisposedOrNotOpen ();
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HttpChannelRequestAsyncResult result = new HttpChannelRequestAsyncResult (message, timeout, this, callback, state);
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BeginProcessRequest (result);
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return result;
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}
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public override Message EndRequest (IAsyncResult result)
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{
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if (result == null)
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throw new ArgumentNullException ("result");
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HttpChannelRequestAsyncResult r = result as HttpChannelRequestAsyncResult;
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if (r == null)
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throw new InvalidOperationException ("Wrong IAsyncResult");
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r.WaitEnd ();
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return r.Response;
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}
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// Abort
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protected override void OnAbort ()
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{
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foreach (var web_request in web_requests.ToArray ())
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web_request.Abort ();
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web_requests.Clear ();
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}
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// Close
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protected override void OnClose (TimeSpan timeout)
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{
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OnAbort ();
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}
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protected override IAsyncResult OnBeginClose (TimeSpan timeout, AsyncCallback callback, object state)
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{
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OnAbort ();
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return base.OnBeginClose (timeout, callback, state);
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}
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protected override void OnEndClose (IAsyncResult result)
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{
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base.OnEndClose (result);
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}
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// Open
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protected override void OnOpen (TimeSpan timeout)
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{
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}
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[MonoTODO ("find out what to do here")]
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protected override IAsyncResult OnBeginOpen (TimeSpan timeout, AsyncCallback callback, object state)
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{
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return base.OnBeginOpen (timeout, callback, state);
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}
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[MonoTODO ("find out what to do here")]
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protected override void OnEndOpen (IAsyncResult result)
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{
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base.OnEndOpen (result);
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}
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class HttpChannelRequestAsyncResult : IAsyncResult, IDisposable
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{
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public Message Message {
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get; private set;
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}
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public TimeSpan Timeout {
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get; private set;
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}
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AsyncCallback callback;
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ManualResetEvent wait;
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Exception error;
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object locker = new object ();
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bool is_completed;
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HttpRequestChannel owner;
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public HttpChannelRequestAsyncResult (Message message, TimeSpan timeout, HttpRequestChannel owner, AsyncCallback callback, object state)
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{
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Message = message;
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Timeout = timeout;
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this.owner = owner;
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this.callback = callback;
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AsyncState = state;
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}
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public Message Response {
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get; set;
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}
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public WebRequest WebRequest { get; set; }
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public WaitHandle AsyncWaitHandle {
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get {
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lock (locker) {
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if (wait == null)
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wait = new ManualResetEvent (is_completed);
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}
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return wait;
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}
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}
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public object AsyncState {
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get; private set;
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}
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public void Complete ()
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{
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Complete (null);
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}
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public void Complete (Exception ex)
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{
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if (IsCompleted) {
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return;
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}
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// If we've already stored an error, don't replace it
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error = error ?? ex;
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IsCompleted = true;
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if (callback != null)
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callback (this);
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}
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public bool CompletedSynchronously {
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get; set;
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}
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public bool IsCompleted {
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get { return is_completed; }
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set {
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is_completed = value;
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lock (locker) {
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if (is_completed && wait != null)
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wait.Set ();
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Cleanup ();
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}
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}
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}
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public void WaitEnd ()
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{
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if (!IsCompleted) {
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// FIXME: Do we need to use the timeout? If so, what happens when the timeout is reached.
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// Is the current request cancelled and an exception thrown? If so we need to pass the
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// exception to the Complete () method and allow the result to complete 'normally'.
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#if NET_2_1
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// neither Moonlight nor MonoTouch supports contexts (WaitOne default to false)
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bool result = AsyncWaitHandle.WaitOne (Timeout);
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#else
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bool result = AsyncWaitHandle.WaitOne (Timeout, true);
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#endif
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if (!result)
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throw new TimeoutException ();
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}
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if (error != null)
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throw error;
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}
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public void Dispose ()
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{
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Cleanup ();
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}
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void Cleanup ()
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{
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owner.web_requests.Remove (WebRequest);
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}
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}
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}
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}
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