343 lines
11 KiB
C#
343 lines
11 KiB
C#
//
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// System.Net.FileWebRequest
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//
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// Author:
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// Lawrence Pit (loz@cable.a2000.nl)
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//
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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.IO;
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using System.Runtime.Serialization;
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using System.Runtime.Remoting.Messaging;
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using System.Threading;
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namespace System.Net
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{
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[Serializable]
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public class FileWebRequest : WebRequest, ISerializable
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{
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private Uri uri;
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private WebHeaderCollection webHeaders;
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private ICredentials credentials;
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private string connectionGroup;
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private long contentLength;
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private FileAccess fileAccess = FileAccess.Read;
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private string method = "GET";
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private IWebProxy proxy;
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private bool preAuthenticate;
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private int timeout = 100000;
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private Stream requestStream;
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private FileWebResponse webResponse;
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private AutoResetEvent requestEndEvent;
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private bool requesting;
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private bool asyncResponding;
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// Constructors
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internal FileWebRequest (Uri uri)
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{
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this.uri = uri;
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this.webHeaders = new WebHeaderCollection ();
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}
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[Obsolete ("Serialization is obsoleted for this type", false)]
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protected FileWebRequest (SerializationInfo serializationInfo, StreamingContext streamingContext)
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{
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SerializationInfo info = serializationInfo;
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webHeaders = (WebHeaderCollection) info.GetValue ("headers", typeof (WebHeaderCollection));
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proxy = (IWebProxy) info.GetValue ("proxy", typeof (IWebProxy));
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uri = (Uri) info.GetValue ("uri", typeof (Uri));
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connectionGroup = info.GetString ("connectionGroupName");
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method = info.GetString ("method");
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contentLength = info.GetInt64 ("contentLength");
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timeout = info.GetInt32 ("timeout");
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fileAccess = (FileAccess) info.GetValue ("fileAccess", typeof (FileAccess));
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preAuthenticate = info.GetBoolean ("preauthenticate");
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}
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// Properties
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// currently not used according to spec
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public override string ConnectionGroupName {
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get { return connectionGroup; }
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set { connectionGroup = value; }
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}
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public override long ContentLength {
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get { return contentLength; }
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set {
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if (value < 0)
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throw new ArgumentException ("The Content-Length value must be greater than or equal to zero.", "value");
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contentLength = value;
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}
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}
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public override string ContentType {
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get { return webHeaders ["Content-Type"]; }
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set { webHeaders ["Content-Type"] = value; }
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}
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public override ICredentials Credentials {
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get { return credentials; }
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set { credentials = value; }
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}
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public override WebHeaderCollection Headers {
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get { return webHeaders; }
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}
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// currently not used according to spec
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public override string Method {
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get { return this.method; }
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set {
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if (value == null || value.Length == 0)
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throw new ArgumentException ("Cannot set null or blank "
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+ "methods on request.", "value");
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this.method = value;
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}
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}
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// currently not used according to spec
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public override bool PreAuthenticate {
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get { return preAuthenticate; }
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set { preAuthenticate = value; }
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}
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// currently not used according to spec
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public override IWebProxy Proxy {
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get { return proxy; }
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set { proxy = value; }
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}
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public override Uri RequestUri {
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get { return this.uri; }
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}
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public override int Timeout {
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get { return timeout; }
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set {
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if (value < -1)
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throw new ArgumentOutOfRangeException ("Timeout can be "
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+ "only set to 'System.Threading.Timeout.Infinite' "
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+ "or a value >= 0.");
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timeout = value;
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}
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}
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public override bool UseDefaultCredentials
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{
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get {
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throw new NotSupportedException ();
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}
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set {
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throw new NotSupportedException ();
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}
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}
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// Methods
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private delegate Stream GetRequestStreamCallback ();
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private delegate WebResponse GetResponseCallback ();
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static Exception GetMustImplement ()
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{
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return new NotImplementedException ();
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}
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/* LAMESPEC: Docs suggest this was present in 1.1 and
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* 1.0 profiles, but the masterinfos say otherwise
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*/
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[MonoTODO]
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public override void Abort ()
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{
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throw GetMustImplement ();
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}
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public override IAsyncResult BeginGetRequestStream (AsyncCallback callback, object state)
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{
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if (string.Compare ("GET", method, true) == 0 ||
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string.Compare ("HEAD", method, true) == 0 ||
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string.Compare ("CONNECT", method, true) == 0)
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throw new ProtocolViolationException ("Cannot send a content-body with this verb-type.");
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lock (this) {
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if (asyncResponding || webResponse != null)
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throw new InvalidOperationException ("This operation cannot be performed after the request has been submitted.");
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if (requesting)
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throw new InvalidOperationException ("Cannot re-call start of asynchronous method while a previous call is still in progress.");
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requesting = true;
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}
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GetRequestStreamCallback c = new GetRequestStreamCallback (this.GetRequestStreamInternal);
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return c.BeginInvoke (callback, state);
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}
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public override Stream EndGetRequestStream (IAsyncResult asyncResult)
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{
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if (asyncResult == null)
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throw new ArgumentNullException ("asyncResult");
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if (!asyncResult.IsCompleted)
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asyncResult.AsyncWaitHandle.WaitOne ();
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AsyncResult async = (AsyncResult) asyncResult;
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GetRequestStreamCallback cb = (GetRequestStreamCallback) async.AsyncDelegate;
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return cb.EndInvoke (asyncResult);
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}
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public override Stream GetRequestStream()
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{
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IAsyncResult asyncResult = BeginGetRequestStream (null, null);
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if (!(asyncResult.AsyncWaitHandle.WaitOne (timeout, false))) {
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throw new WebException("The request timed out", WebExceptionStatus.Timeout);
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}
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return EndGetRequestStream (asyncResult);
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}
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internal Stream GetRequestStreamInternal ()
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{
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this.requestStream = new FileWebStream (
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this,
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FileMode.Create,
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FileAccess.Write,
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FileShare.Read);
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return this.requestStream;
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}
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public override IAsyncResult BeginGetResponse (AsyncCallback callback, object state)
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{
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lock (this) {
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if (asyncResponding)
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throw new InvalidOperationException ("Cannot re-call start of asynchronous method while a previous call is still in progress.");
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asyncResponding = true;
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}
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GetResponseCallback c = new GetResponseCallback (this.GetResponseInternal);
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return c.BeginInvoke (callback, state);
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}
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public override WebResponse EndGetResponse (IAsyncResult asyncResult)
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{
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if (asyncResult == null)
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throw new ArgumentNullException ("asyncResult");
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if (!asyncResult.IsCompleted)
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asyncResult.AsyncWaitHandle.WaitOne ();
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AsyncResult async = (AsyncResult) asyncResult;
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GetResponseCallback cb = (GetResponseCallback) async.AsyncDelegate;
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FileWebResponse webResponse = (FileWebResponse) cb.EndInvoke(asyncResult);
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asyncResponding = false;
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if (webResponse.HasError)
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throw webResponse.Error;
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return webResponse;
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}
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public override WebResponse GetResponse ()
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{
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IAsyncResult asyncResult = BeginGetResponse (null, null);
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if (!(asyncResult.AsyncWaitHandle.WaitOne (timeout, false))) {
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throw new WebException("The request timed out", WebExceptionStatus.Timeout);
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}
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return EndGetResponse (asyncResult);
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}
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WebResponse GetResponseInternal ()
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{
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if (webResponse != null)
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return webResponse;
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lock (this) {
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if (requesting) {
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requestEndEvent = new AutoResetEvent (false);
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}
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}
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if (requestEndEvent != null) {
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requestEndEvent.WaitOne ();
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}
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FileStream fileStream = null;
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try {
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fileStream = new FileWebStream (this, FileMode.Open, FileAccess.Read, FileShare.Read);
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this.webResponse = new FileWebResponse (this.uri, fileStream);
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} catch (Exception ex) {
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this.webResponse = new FileWebResponse (this.uri, new WebException (ex.Message, ex));
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}
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return this.webResponse;
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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 override void GetObjectData (SerializationInfo serializationInfo, StreamingContext streamingContext)
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{
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SerializationInfo info = serializationInfo;
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info.AddValue ("headers", webHeaders, typeof (WebHeaderCollection));
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info.AddValue ("proxy", proxy, typeof (IWebProxy));
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info.AddValue ("uri", uri, typeof (Uri));
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info.AddValue ("connectionGroupName", connectionGroup);
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info.AddValue ("method", method);
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info.AddValue ("contentLength", contentLength);
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info.AddValue ("timeout", timeout);
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info.AddValue ("fileAccess", fileAccess);
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info.AddValue ("preauthenticate", false);
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}
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internal void Close ()
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{
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// already done in class below
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// if (requestStream != null) {
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// requestStream.Close ();
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// }
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lock (this) {
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requesting = false;
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if (requestEndEvent != null)
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requestEndEvent.Set ();
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// requestEndEvent = null;
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}
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}
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// to catch the Close called on the FileStream
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internal class FileWebStream : FileStream
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{
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FileWebRequest webRequest;
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internal FileWebStream (FileWebRequest webRequest,
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FileMode mode,
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FileAccess access,
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FileShare share)
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: base (webRequest.RequestUri.LocalPath,
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mode, access, share)
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{
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this.webRequest = webRequest;
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}
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public override void Close()
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{
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base.Close ();
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FileWebRequest req = webRequest;
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webRequest = null;
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if (req != null)
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req.Close ();
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}
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}
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}
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}
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