549 lines
15 KiB
C#
549 lines
15 KiB
C#
//
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// System.Net.WebRequest
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//
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// Authors:
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// Lawrence Pit (loz@cable.a2000.nl)
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// Marek Safar (marek.safar@gmail.com)
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//
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// Copyright 2011 Xamarin Inc.
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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;
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using System.Collections.Specialized;
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using System.Configuration;
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using System.IO;
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using System.Reflection;
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using System.Runtime.Serialization;
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using System.Globalization;
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using System.Net.Configuration;
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using System.Net.Security;
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using System.Net.Cache;
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using System.Security.Principal;
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using System.Threading.Tasks;
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using System.Text.RegularExpressions;
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using Mono.Net;
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#if NET_2_1
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using ConfigurationException = System.ArgumentException;
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namespace System.Net.Configuration {
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class Dummy {}
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}
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#endif
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namespace System.Net
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{
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[Serializable]
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public abstract class WebRequest : MarshalByRefObject, ISerializable {
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static HybridDictionary prefixes = new HybridDictionary ();
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static bool isDefaultWebProxySet;
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static IWebProxy defaultWebProxy;
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static RequestCachePolicy defaultCachePolicy;
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internal const int DefaultTimeout = 100000;
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static WebRequest ()
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{
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#if MOBILE
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IWebRequestCreate http = new HttpRequestCreator ();
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RegisterPrefix ("http", http);
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RegisterPrefix ("https", http);
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RegisterPrefix ("file", new FileWebRequestCreator ());
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RegisterPrefix ("ftp", new FtpRequestCreator ());
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#else
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#if CONFIGURATION_DEP
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object cfg = ConfigurationManager.GetSection ("system.net/webRequestModules");
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WebRequestModulesSection s = cfg as WebRequestModulesSection;
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if (s != null) {
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foreach (WebRequestModuleElement el in
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s.WebRequestModules)
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AddPrefix (el.Prefix, el.Type);
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return;
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}
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#endif
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ConfigurationSettings.GetConfig ("system.net/webRequestModules");
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#endif
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}
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protected WebRequest ()
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{
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}
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protected WebRequest (SerializationInfo serializationInfo, StreamingContext streamingContext)
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{
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}
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static Exception GetMustImplement ()
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{
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return new NotImplementedException ("This method must be implemented in derived classes");
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}
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// Properties
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private AuthenticationLevel authentication_level = AuthenticationLevel.MutualAuthRequested;
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public AuthenticationLevel AuthenticationLevel
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{
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get {
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return(authentication_level);
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}
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set {
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authentication_level = value;
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}
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}
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public virtual string ConnectionGroupName {
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get { throw GetMustImplement (); }
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set { throw GetMustImplement (); }
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}
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public virtual long ContentLength {
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get { throw GetMustImplement (); }
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set { throw GetMustImplement (); }
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}
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public virtual string ContentType {
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get { throw GetMustImplement (); }
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set { throw GetMustImplement (); }
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}
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public virtual ICredentials Credentials {
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get { throw GetMustImplement (); }
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set { throw GetMustImplement (); }
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}
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[MonoTODO ("Implement the caching system. Currently always returns a policy with the NoCacheNoStore level")]
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public virtual RequestCachePolicy CachePolicy
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{
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get { return DefaultCachePolicy; }
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set {
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}
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}
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public static RequestCachePolicy DefaultCachePolicy {
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get {
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return defaultCachePolicy ?? (defaultCachePolicy = new HttpRequestCachePolicy (HttpRequestCacheLevel.NoCacheNoStore));
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}
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set {
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throw GetMustImplement ();
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}
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}
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public virtual WebHeaderCollection Headers {
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get { throw GetMustImplement (); }
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set { throw GetMustImplement (); }
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}
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public virtual string Method {
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get { throw GetMustImplement (); }
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set { throw GetMustImplement (); }
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}
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public virtual bool PreAuthenticate {
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get { throw GetMustImplement (); }
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set { throw GetMustImplement (); }
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}
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public virtual IWebProxy Proxy {
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get { throw GetMustImplement (); }
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set { throw GetMustImplement (); }
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}
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public virtual Uri RequestUri {
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get { throw GetMustImplement (); }
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}
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public virtual int Timeout {
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get { throw GetMustImplement (); }
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set { throw GetMustImplement (); }
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}
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public virtual bool UseDefaultCredentials
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{
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get {
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throw GetMustImplement ();
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}
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set {
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throw GetMustImplement ();
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}
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}
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public TokenImpersonationLevel ImpersonationLevel { get; set; }
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// volatile static IWebProxy proxy;
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static readonly object lockobj = new object ();
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public static IWebProxy DefaultWebProxy {
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get {
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if (!isDefaultWebProxySet) {
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lock (lockobj) {
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if (defaultWebProxy == null)
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defaultWebProxy = GetDefaultWebProxy ();
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}
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}
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return defaultWebProxy;
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}
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set {
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/* MS documentation states that a null value would cause an ArgumentNullException
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* but that's not the way it behaves:
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* https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=304724
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*/
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defaultWebProxy = value;
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isDefaultWebProxySet = true;
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}
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}
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internal static IWebProxy InternalDefaultWebProxy {
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get {
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return DefaultWebProxy;
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}
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}
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[MonoTODO("Needs to respect Module, Proxy.AutoDetect, and Proxy.ScriptLocation config settings")]
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static IWebProxy GetDefaultWebProxy ()
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{
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#if CONFIGURATION_DEP
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DefaultProxySection sec = ConfigurationManager.GetSection ("system.net/defaultProxy") as DefaultProxySection;
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WebProxy p;
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if (sec == null)
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return GetSystemWebProxy ();
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ProxyElement pe = sec.Proxy;
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if ((pe.UseSystemDefault != ProxyElement.UseSystemDefaultValues.False) && (pe.ProxyAddress == null)) {
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IWebProxy proxy = GetSystemWebProxy ();
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if (!(proxy is WebProxy))
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return proxy;
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p = (WebProxy) proxy;
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} else
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p = new WebProxy ();
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if (pe.ProxyAddress != null)
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p.Address = pe.ProxyAddress;
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if (pe.BypassOnLocal != ProxyElement.BypassOnLocalValues.Unspecified)
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p.BypassProxyOnLocal = (pe.BypassOnLocal == ProxyElement.BypassOnLocalValues.True);
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foreach(BypassElement elem in sec.BypassList)
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p.BypassArrayList.Add(elem.Address);
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return p;
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#else
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return GetSystemWebProxy ();
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#endif
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}
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// Methods
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public virtual void Abort()
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{
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throw GetMustImplement ();
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}
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public virtual IAsyncResult BeginGetRequestStream (AsyncCallback callback, object state)
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{
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throw GetMustImplement ();
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}
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public virtual IAsyncResult BeginGetResponse (AsyncCallback callback, object state)
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{
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throw GetMustImplement ();
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}
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public static WebRequest Create (string requestUriString)
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{
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if (requestUriString == null)
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throw new ArgumentNullException ("requestUriString");
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return Create (new Uri (requestUriString));
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}
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public static WebRequest Create (Uri requestUri)
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{
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if (requestUri == null)
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throw new ArgumentNullException ("requestUri");
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return GetCreator (requestUri.AbsoluteUri).Create (requestUri);
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}
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public static WebRequest CreateDefault (Uri requestUri)
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{
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if (requestUri == null)
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throw new ArgumentNullException ("requestUri");
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return GetCreator (requestUri.Scheme).Create (requestUri);
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}
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static HttpWebRequest SharedCreateHttp (Uri uri)
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{
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if (uri.Scheme != "http" && uri.Scheme != "https")
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throw new NotSupportedException ("The uri should start with http or https");
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return new HttpWebRequest (uri);
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}
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public static HttpWebRequest CreateHttp (string requestUriString)
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{
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if (requestUriString == null)
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throw new ArgumentNullException ("requestUriString");
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return SharedCreateHttp (new Uri (requestUriString));
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}
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public static HttpWebRequest CreateHttp (Uri requestUri)
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{
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if (requestUri == null)
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throw new ArgumentNullException ("requestUri");
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return SharedCreateHttp (requestUri);
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}
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public virtual Stream EndGetRequestStream (IAsyncResult asyncResult)
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{
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throw GetMustImplement ();
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}
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public virtual WebResponse EndGetResponse (IAsyncResult asyncResult)
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{
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throw GetMustImplement ();
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}
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public virtual Stream GetRequestStream()
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{
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throw GetMustImplement ();
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}
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public virtual WebResponse GetResponse()
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{
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throw GetMustImplement ();
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}
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// Takes an ArrayList of fileglob-formatted strings and returns an array of Regex-formatted strings
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private static string[] CreateBypassList (ArrayList al)
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{
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string[] result = al.ToArray (typeof (string)) as string[];
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for (int c = 0; c < result.Length; c++)
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{
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result [c] = "^" +
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Regex.Escape (result [c]).Replace (@"\*", ".*").Replace (@"\?", ".") +
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"$";
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}
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return result;
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}
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[MonoTODO("Look in other places for proxy config info")]
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public static IWebProxy GetSystemWebProxy ()
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{
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#if MONOTOUCH
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return CFNetwork.GetDefaultProxy ();
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#else
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#if MONODROID
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// Return the system web proxy. This only works for ICS+.
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var androidProxy = AndroidPlatform.GetDefaultProxy ();
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if (androidProxy != null)
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return androidProxy;
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#endif
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#if !NET_2_1
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if (IsWindows ()) {
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int iProxyEnable = (int)Microsoft.Win32.Registry.GetValue ("HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings", "ProxyEnable", 0);
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if (iProxyEnable > 0) {
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string strHttpProxy = "";
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bool bBypassOnLocal = false;
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ArrayList al = new ArrayList ();
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string strProxyServer = (string)Microsoft.Win32.Registry.GetValue ("HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings", "ProxyServer", null);
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string strProxyOverrride = (string)Microsoft.Win32.Registry.GetValue ("HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings", "ProxyOverride", null);
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if (strProxyServer.Contains ("=")) {
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foreach (string strEntry in strProxyServer.Split (new char[] { ';' }, StringSplitOptions.RemoveEmptyEntries))
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if (strEntry.StartsWith ("http=")) {
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strHttpProxy = strEntry.Substring (5);
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break;
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}
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} else strHttpProxy = strProxyServer;
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if (strProxyOverrride != null) {
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string[] bypassList = strProxyOverrride.Split (new char[] { ';' }, StringSplitOptions.RemoveEmptyEntries);
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foreach (string str in bypassList) {
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if (str != "<local>")
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al.Add (str);
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else
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bBypassOnLocal = true;
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}
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}
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return new WebProxy (strHttpProxy, bBypassOnLocal, CreateBypassList (al));
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}
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} else {
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#endif
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if (Platform.IsMacOS)
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return CFNetwork.GetDefaultProxy ();
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string address = Environment.GetEnvironmentVariable ("http_proxy");
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if (address == null)
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address = Environment.GetEnvironmentVariable ("HTTP_PROXY");
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if (address != null) {
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try {
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if (!address.StartsWith ("http://"))
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address = "http://" + address;
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Uri uri = new Uri (address);
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IPAddress ip;
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if (IPAddress.TryParse (uri.Host, out ip)) {
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if (IPAddress.Any.Equals (ip)) {
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UriBuilder builder = new UriBuilder (uri);
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builder.Host = "127.0.0.1";
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uri = builder.Uri;
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} else if (IPAddress.IPv6Any.Equals (ip)) {
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UriBuilder builder = new UriBuilder (uri);
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builder.Host = "[::1]";
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uri = builder.Uri;
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}
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}
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bool bBypassOnLocal = false;
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ArrayList al = new ArrayList ();
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string bypass = Environment.GetEnvironmentVariable ("no_proxy");
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if (bypass == null)
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bypass = Environment.GetEnvironmentVariable ("NO_PROXY");
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if (bypass != null) {
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string[] bypassList = bypass.Split (new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
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foreach (string str in bypassList) {
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if (str != "*.local")
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al.Add (str);
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else
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bBypassOnLocal = true;
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}
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}
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return new WebProxy (uri, bBypassOnLocal, CreateBypassList (al));
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} catch (UriFormatException) {
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}
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}
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#if !NET_2_1
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}
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#endif
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return new WebProxy ();
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#endif // MONOTOUCH
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}
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void ISerializable.GetObjectData (SerializationInfo serializationInfo, StreamingContext streamingContext)
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{
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GetObjectData(serializationInfo, streamingContext);
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}
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protected virtual void GetObjectData (SerializationInfo serializationInfo, StreamingContext streamingContext)
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{
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}
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public static bool RegisterPrefix (string prefix, IWebRequestCreate creator)
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{
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if (prefix == null)
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throw new ArgumentNullException ("prefix");
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if (creator == null)
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throw new ArgumentNullException ("creator");
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lock (prefixes.SyncRoot) {
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string lowerCasePrefix = prefix.ToLower (CultureInfo.InvariantCulture);
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if (prefixes.Contains (lowerCasePrefix))
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return false;
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prefixes.Add (lowerCasePrefix, creator);
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}
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return true;
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}
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private static IWebRequestCreate GetCreator (string prefix)
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{
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int longestPrefix = -1;
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IWebRequestCreate creator = null;
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prefix = prefix.ToLower (CultureInfo.InvariantCulture);
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IDictionaryEnumerator e = prefixes.GetEnumerator ();
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while (e.MoveNext ()) {
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string key = e.Key as string;
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if (key.Length <= longestPrefix)
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continue;
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if (!prefix.StartsWith (key))
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continue;
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longestPrefix = key.Length;
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creator = (IWebRequestCreate) e.Value;
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}
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if (creator == null)
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throw new NotSupportedException (prefix);
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return creator;
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}
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internal static bool IsWindows ()
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{
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return (int) Environment.OSVersion.Platform < 4;
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}
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internal static void ClearPrefixes ()
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{
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prefixes.Clear ();
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}
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internal static void RemovePrefix (string prefix)
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{
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prefixes.Remove (prefix);
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}
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internal static void AddPrefix (string prefix, string typeName)
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{
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Type type = Type.GetType (typeName);
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if (type == null)
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throw new ConfigurationException (String.Format ("Type {0} not found", typeName));
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AddPrefix (prefix, type);
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}
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internal static void AddPrefix (string prefix, Type type)
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{
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object o = Activator.CreateInstance (type, true);
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prefixes [prefix] = o;
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}
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public virtual Task<Stream> GetRequestStreamAsync ()
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{
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return Task<Stream>.Factory.FromAsync (BeginGetRequestStream, EndGetRequestStream, null);
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}
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public virtual Task<WebResponse> GetResponseAsync ()
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{
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return Task<WebResponse>.Factory.FromAsync (BeginGetResponse, EndGetResponse, null);
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}
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}
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}
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