//
// System.Net.HttpWebRequest
//
// Authors:
// Lawrence Pit (loz@cable.a2000.nl)
// Gonzalo Paniagua Javier (gonzalo@ximian.com)
//
// (c) 2002 Lawrence Pit
// (c) 2003 Ximian, Inc. (http://www.ximian.com)
// (c) 2004 Novell, Inc. (http://www.novell.com)
//
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.Collections;
using System.Configuration;
using System.IO;
using System.Net.Cache;
using System.Net.Sockets;
using System.Runtime.Remoting.Messaging;
using System.Runtime.Serialization;
using System.Security.Cryptography.X509Certificates;
using System.Text;
using System.Threading;
namespace System.Net{
#if MOONLIGHT
internal class HttpWebRequest : WebRequest, ISerializable {
#else
[Serializable]
public class HttpWebRequest : WebRequest, ISerializable {
#endif
Uri requestUri;
Uri actualUri;
bool hostChanged;
bool allowAutoRedirect = true;
bool allowBuffering = true;
X509CertificateCollection certificates;
string connectionGroup;
long contentLength = -1;
HttpContinueDelegate continueDelegate;
CookieContainer cookieContainer;
ICredentials credentials;
bool haveResponse;
bool haveRequest;
bool requestSent;
WebHeaderCollection webHeaders = new WebHeaderCollection (true);
bool keepAlive = true;
int maxAutoRedirect = 50;
string mediaType = String.Empty;
string method = "GET";
string initialMethod = "GET";
bool pipelined = true;
bool preAuthenticate;
bool usedPreAuth;
Version version = HttpVersion.Version11;
Version actualVersion;
IWebProxy proxy;
bool sendChunked;
ServicePoint servicePoint;
int timeout = 100000;
WebConnectionStream writeStream;
HttpWebResponse webResponse;
WebAsyncResult asyncWrite;
WebAsyncResult asyncRead;
EventHandler abortHandler;
int aborted;
bool gotRequestStream;
int redirects;
bool expectContinue;
bool authCompleted;
byte[] bodyBuffer;
int bodyBufferLength;
bool getResponseCalled;
Exception saved_exc;
object locker = new object ();
bool is_ntlm_auth;
bool finished_reading;
internal WebConnection WebConnection;
DecompressionMethods auto_decomp;
int maxResponseHeadersLength;
static int defaultMaxResponseHeadersLength;
int readWriteTimeout = 300000; // ms
// Constructors
static HttpWebRequest ()
{
defaultMaxResponseHeadersLength = 64 * 1024;
#if !NET_2_1
NetConfig config = ConfigurationSettings.GetConfig ("system.net/settings") as NetConfig;
if (config != null) {
int x = config.MaxResponseHeadersLength;
if (x != -1)
x *= 64;
defaultMaxResponseHeadersLength = x;
}
#endif
}
#if NET_2_1
public
#else
internal
#endif
HttpWebRequest (Uri uri)
{
this.requestUri = uri;
this.actualUri = uri;
this.proxy = GlobalProxySelection.Select;
}
[Obsolete ("Serialization is obsoleted for this type", false)]
protected HttpWebRequest (SerializationInfo serializationInfo, StreamingContext streamingContext)
{
SerializationInfo info = serializationInfo;
requestUri = (Uri) info.GetValue ("requestUri", typeof (Uri));
actualUri = (Uri) info.GetValue ("actualUri", typeof (Uri));
allowAutoRedirect = info.GetBoolean ("allowAutoRedirect");
allowBuffering = info.GetBoolean ("allowBuffering");
certificates = (X509CertificateCollection) info.GetValue ("certificates", typeof (X509CertificateCollection));
connectionGroup = info.GetString ("connectionGroup");
contentLength = info.GetInt64 ("contentLength");
webHeaders = (WebHeaderCollection) info.GetValue ("webHeaders", typeof (WebHeaderCollection));
keepAlive = info.GetBoolean ("keepAlive");
maxAutoRedirect = info.GetInt32 ("maxAutoRedirect");
mediaType = info.GetString ("mediaType");
method = info.GetString ("method");
initialMethod = info.GetString ("initialMethod");
pipelined = info.GetBoolean ("pipelined");
version = (Version) info.GetValue ("version", typeof (Version));
proxy = (IWebProxy) info.GetValue ("proxy", typeof (IWebProxy));
sendChunked = info.GetBoolean ("sendChunked");
timeout = info.GetInt32 ("timeout");
redirects = info.GetInt32 ("redirects");
}
// Properties
internal bool UsesNtlmAuthentication {
get { return is_ntlm_auth; }
}
public string Accept {
get { return webHeaders ["Accept"]; }
set {
CheckRequestStarted ();
webHeaders.RemoveAndAdd ("Accept", value);
}
}
public Uri Address {
get { return actualUri; }
}
public bool AllowAutoRedirect {
get { return allowAutoRedirect; }
set { this.allowAutoRedirect = value; }
}
public bool AllowWriteStreamBuffering {
get { return allowBuffering; }
set { allowBuffering = value; }
}
static Exception GetMustImplement ()
{
return new NotImplementedException ();
}
public DecompressionMethods AutomaticDecompression
{
get {
return auto_decomp;
}
set {
CheckRequestStarted ();
auto_decomp = value;
}
}
internal bool InternalAllowBuffering {
get {
return (allowBuffering && (method != "HEAD" && method != "GET" &&
method != "MKCOL" && method != "CONNECT" &&
method != "DELETE" && method != "TRACE"));
}
}
public X509CertificateCollection ClientCertificates {
get {
if (certificates == null)
certificates = new X509CertificateCollection ();
return certificates;
}
[MonoTODO]
set {
throw GetMustImplement ();
}
}
public string Connection {
get { return webHeaders ["Connection"]; }
set {
CheckRequestStarted ();
string val = value;
if (val != null)
val = val.Trim ().ToLower ();
if (val == null || val.Length == 0) {
webHeaders.RemoveInternal ("Connection");
return;
}
if (val == "keep-alive" || val == "close")
throw new ArgumentException ("Keep-Alive and Close may not be set with this property");
if (keepAlive && val.IndexOf ("keep-alive") == -1)
value = value + ", Keep-Alive";
webHeaders.RemoveAndAdd ("Connection", value);
}
}
public override string ConnectionGroupName {
get { return connectionGroup; }
set { connectionGroup = value; }
}
public override long ContentLength {
get { return contentLength; }
set {
CheckRequestStarted ();
if (value < 0)
throw new ArgumentOutOfRangeException ("value", "Content-Length must be >= 0");
contentLength = value;
}
}
internal long InternalContentLength {
set { contentLength = value; }
}
public override string ContentType {
get { return webHeaders ["Content-Type"]; }
set {
if (value == null || value.Trim().Length == 0) {
webHeaders.RemoveInternal ("Content-Type");
return;
}
webHeaders.RemoveAndAdd ("Content-Type", value);
}
}
public HttpContinueDelegate ContinueDelegate {
get { return continueDelegate; }
set { continueDelegate = value; }
}
public CookieContainer CookieContainer {
get { return cookieContainer; }
set { cookieContainer = value; }
}
public override ICredentials Credentials {
get { return credentials; }
set { credentials = value; }
}
[MonoTODO]
public static new RequestCachePolicy DefaultCachePolicy
{
get {
throw GetMustImplement ();
}
set {
throw GetMustImplement ();
}
}
[MonoTODO]
public static int DefaultMaximumErrorResponseLength
{
get {
throw GetMustImplement ();
}
set {
throw GetMustImplement ();
}
}
public string Expect {
get { return webHeaders ["Expect"]; }
set {
CheckRequestStarted ();
string val = value;
if (val != null)
val = val.Trim ().ToLower ();
if (val == null || val.Length == 0) {
webHeaders.RemoveInternal ("Expect");
return;
}
if (val == "100-continue")
throw new ArgumentException ("100-Continue cannot be set with this property.",
"value");
webHeaders.RemoveAndAdd ("Expect", value);
}
}
public bool HaveResponse {
get { return haveResponse; }
}
public override WebHeaderCollection Headers {
get { return webHeaders; }
set {
CheckRequestStarted ();
WebHeaderCollection newHeaders = new WebHeaderCollection (true);
int count = value.Count;
for (int i = 0; i < count; i++)
newHeaders.Add (value.GetKey (i), value.Get (i));
webHeaders = newHeaders;
}
}
public DateTime IfModifiedSince {
get {
string str = webHeaders ["If-Modified-Since"];
if (str == null)
return DateTime.Now;
try {
return MonoHttpDate.Parse (str);
} catch (Exception) {
return DateTime.Now;
}
}
set {
CheckRequestStarted ();
// rfc-1123 pattern
webHeaders.SetInternal ("If-Modified-Since",
value.ToUniversalTime ().ToString ("r", null));
// TODO: check last param when using different locale
}
}
public bool KeepAlive {
get {
return keepAlive;
}
set {
keepAlive = value;
}
}
public int MaximumAutomaticRedirections {
get { return maxAutoRedirect; }
set {
if (value <= 0)
throw new ArgumentException ("Must be > 0", "value");
maxAutoRedirect = value;
}
}
[MonoTODO ("Use this")]
public int MaximumResponseHeadersLength {
get { return maxResponseHeadersLength; }
set { maxResponseHeadersLength = value; }
}
[MonoTODO ("Use this")]
public static int DefaultMaximumResponseHeadersLength {
get { return defaultMaxResponseHeadersLength; }
set { defaultMaxResponseHeadersLength = value; }
}
public int ReadWriteTimeout {
get { return readWriteTimeout; }
set {
if (requestSent)
throw new InvalidOperationException ("The request has already been sent.");
if (value < -1)
throw new ArgumentOutOfRangeException ("value", "Must be >= -1");
readWriteTimeout = value;
}
}
public string MediaType {
get { return mediaType; }
set {
mediaType = value;
}
}
public override string Method {
get { return this.method; }
set {
if (value == null || value.Trim () == "")
throw new ArgumentException ("not a valid method");
method = value;
}
}
public bool Pipelined {
get { return pipelined; }
set { pipelined = value; }
}
public override bool PreAuthenticate {
get { return preAuthenticate; }
set { preAuthenticate = value; }
}
public Version ProtocolVersion {
get { return version; }
set {
if (value != HttpVersion.Version10 && value != HttpVersion.Version11)
throw new ArgumentException ("value");
version = value;
}
}
public override IWebProxy Proxy {
get { return proxy; }
set {
CheckRequestStarted ();
proxy = value;
servicePoint = null; // we may need a new one
}
}
public string Referer {
get { return webHeaders ["Referer"]; }
set {
CheckRequestStarted ();
if (value == null || value.Trim().Length == 0) {
webHeaders.RemoveInternal ("Referer");
return;
}
webHeaders.SetInternal ("Referer", value);
}
}
public override Uri RequestUri {
get { return requestUri; }
}
public bool SendChunked {
get { return sendChunked; }
set {
CheckRequestStarted ();
sendChunked = value;
}
}
public ServicePoint ServicePoint {
get { return GetServicePoint (); }
}
public override int Timeout {
get { return timeout; }
set {
if (value < -1)
throw new ArgumentOutOfRangeException ("value");
timeout = value;
}
}
public string TransferEncoding {
get { return webHeaders ["Transfer-Encoding"]; }
set {
CheckRequestStarted ();
string val = value;
if (val != null)
val = val.Trim ().ToLower ();
if (val == null || val.Length == 0) {
webHeaders.RemoveInternal ("Transfer-Encoding");
return;
}
if (val == "chunked")
throw new ArgumentException ("Chunked encoding must be set with the SendChunked property");
if (!sendChunked)
throw new ArgumentException ("SendChunked must be True", "value");
webHeaders.RemoveAndAdd ("Transfer-Encoding", value);
}
}
public override bool UseDefaultCredentials
{
get { return CredentialCache.DefaultCredentials == Credentials; }
set { Credentials = value ? CredentialCache.DefaultCredentials : null; }
}
public string UserAgent {
get { return webHeaders ["User-Agent"]; }
set { webHeaders.SetInternal ("User-Agent", value); }
}
bool unsafe_auth_blah;
public bool UnsafeAuthenticatedConnectionSharing
{
get { return unsafe_auth_blah; }
set { unsafe_auth_blah = value; }
}
internal bool GotRequestStream {
get { return gotRequestStream; }
}
internal bool ExpectContinue {
get { return expectContinue; }
set { expectContinue = value; }
}
internal Uri AuthUri {
get { return actualUri; }
}
internal bool ProxyQuery {
get { return servicePoint.UsesProxy && !servicePoint.UseConnect; }
}
// Methods
internal ServicePoint GetServicePoint ()
{
lock (locker) {
if (hostChanged || servicePoint == null) {
servicePoint = ServicePointManager.FindServicePoint (actualUri, proxy);
hostChanged = false;
}
}
return servicePoint;
}
public void AddRange (int range)
{
AddRange ("bytes", range);
}
public void AddRange (int from, int to)
{
AddRange ("bytes", from, to);
}
public void AddRange (string rangeSpecifier, int range)
{
if (rangeSpecifier == null)
throw new ArgumentNullException ("rangeSpecifier");
string value = webHeaders ["Range"];
if (value == null || value.Length == 0)
value = rangeSpecifier + "=";
else if (value.ToLower ().StartsWith (rangeSpecifier.ToLower () + "="))
value += ",";
else
throw new InvalidOperationException ("rangeSpecifier");
webHeaders.RemoveAndAdd ("Range", value + range + "-");
}
public void AddRange (string rangeSpecifier, int from, int to)
{
if (rangeSpecifier == null)
throw new ArgumentNullException ("rangeSpecifier");
if (from < 0 || to < 0 || from > to)
throw new ArgumentOutOfRangeException ();
string value = webHeaders ["Range"];
if (value == null || value.Length == 0)
value = rangeSpecifier + "=";
else if (value.ToLower ().StartsWith (rangeSpecifier.ToLower () + "="))
value += ",";
else
throw new InvalidOperationException ("rangeSpecifier");
webHeaders.RemoveAndAdd ("Range", value + from + "-" + to);
}
public override IAsyncResult BeginGetRequestStream (AsyncCallback callback, object state)
{
if (Aborted)
throw new WebException ("The request was canceled.", WebExceptionStatus.RequestCanceled);
bool send = !(method == "GET" || method == "CONNECT" || method == "HEAD" ||
method == "TRACE" || method == "DELETE");
if (method == null || !send)
throw new ProtocolViolationException ("Cannot send data when method is: " + method);
if (contentLength == -1 && !sendChunked && !allowBuffering && KeepAlive)
throw new ProtocolViolationException ("Content-Length not set");
string transferEncoding = TransferEncoding;
if (!sendChunked && transferEncoding != null && transferEncoding.Trim () != "")
throw new ProtocolViolationException ("SendChunked should be true.");
lock (locker)
{
if (asyncWrite != null) {
throw new InvalidOperationException ("Cannot re-call start of asynchronous " +
"method while a previous call is still in progress.");
}
asyncWrite = new WebAsyncResult (this, callback, state);
initialMethod = method;
if (haveRequest) {
if (writeStream != null) {
asyncWrite.SetCompleted (true, writeStream);
asyncWrite.DoCallback ();
return asyncWrite;
}
}
gotRequestStream = true;
WebAsyncResult result = asyncWrite;
if (!requestSent) {
requestSent = true;
redirects = 0;
servicePoint = GetServicePoint ();
abortHandler = servicePoint.SendRequest (this, connectionGroup);
}
return result;
}
}
public override Stream EndGetRequestStream (IAsyncResult asyncResult)
{
if (asyncResult == null)
throw new ArgumentNullException ("asyncResult");
WebAsyncResult result = asyncResult as WebAsyncResult;
if (result == null)
throw new ArgumentException ("Invalid IAsyncResult");
asyncWrite = result;
result.WaitUntilComplete ();
Exception e = result.Exception;
if (e != null)
throw e;
return result.WriteStream;
}
public override Stream GetRequestStream()
{
IAsyncResult asyncResult = asyncWrite;
if (asyncResult == null) {
asyncResult = BeginGetRequestStream (null, null);
asyncWrite = (WebAsyncResult) asyncResult;
}
if (!asyncResult.AsyncWaitHandle.WaitOne (timeout, false)) {
Abort ();
throw new WebException ("The request timed out", WebExceptionStatus.Timeout);
}
return EndGetRequestStream (asyncResult);
}
void CheckIfForceWrite ()
{
if (writeStream == null || writeStream.RequestWritten|| contentLength < 0 || !InternalAllowBuffering)
return;
// This will write the POST/PUT if the write stream already has the expected
// amount of bytes in it (ContentLength) (bug #77753).
if (writeStream.WriteBufferLength == contentLength)
writeStream.WriteRequest ();
}
public override IAsyncResult BeginGetResponse (AsyncCallback callback, object state)
{
if (Aborted)
throw new WebException ("The request was canceled.", WebExceptionStatus.RequestCanceled);
if (method == null)
throw new ProtocolViolationException ("Method is null.");
string transferEncoding = TransferEncoding;
if (!sendChunked && transferEncoding != null && transferEncoding.Trim () != "")
throw new ProtocolViolationException ("SendChunked should be true.");
Monitor.Enter (locker);
getResponseCalled = true;
if (asyncRead != null && !haveResponse) {
Monitor.Exit (locker);
throw new InvalidOperationException ("Cannot re-call start of asynchronous " +
"method while a previous call is still in progress.");
}
CheckIfForceWrite ();
asyncRead = new WebAsyncResult (this, callback, state);
WebAsyncResult aread = asyncRead;
initialMethod = method;
if (haveResponse) {
Exception saved = saved_exc;
if (webResponse != null) {
Monitor.Exit (locker);
if (saved == null) {
aread.SetCompleted (true, webResponse);
} else {
aread.SetCompleted (true, saved);
}
aread.DoCallback ();
return aread;
} else if (saved != null) {
Monitor.Exit (locker);
aread.SetCompleted (true, saved);
aread.DoCallback ();
return aread;
}
}
if (!requestSent) {
requestSent = true;
redirects = 0;
servicePoint = GetServicePoint ();
abortHandler = servicePoint.SendRequest (this, connectionGroup);
}
Monitor.Exit (locker);
return aread;
}
public override WebResponse EndGetResponse (IAsyncResult asyncResult)
{
if (asyncResult == null)
throw new ArgumentNullException ("asyncResult");
WebAsyncResult result = asyncResult as WebAsyncResult;
if (result == null)
throw new ArgumentException ("Invalid IAsyncResult", "asyncResult");
if (!result.WaitUntilComplete (timeout, false)) {
Abort ();
throw new WebException("The request timed out", WebExceptionStatus.Timeout);
}
if (result.GotException)
throw result.Exception;
return result.Response;
}
public override WebResponse GetResponse()
{
WebAsyncResult result = (WebAsyncResult) BeginGetResponse (null, null);
return EndGetResponse (result);
}
internal bool FinishedReading {
get { return finished_reading; }
set { finished_reading = value; }
}
internal bool Aborted {
get { return Interlocked.CompareExchange (ref aborted, 0, 0) == 1; }
}
public override void Abort ()
{
if (Interlocked.CompareExchange (ref aborted, 1, 0) == 1)
return;
if (haveResponse && finished_reading)
return;
haveResponse = true;
if (abortHandler != null) {
try {
abortHandler (this, EventArgs.Empty);
} catch (Exception) {}
abortHandler = null;
}
if (asyncWrite != null) {
WebAsyncResult r = asyncWrite;
if (!r.IsCompleted) {
try {
WebException wexc = new WebException ("Aborted.", WebExceptionStatus.RequestCanceled);
r.SetCompleted (false, wexc);
r.DoCallback ();
} catch {}
}
asyncWrite = null;
}
if (asyncRead != null) {
WebAsyncResult r = asyncRead;
if (!r.IsCompleted) {
try {
WebException wexc = new WebException ("Aborted.", WebExceptionStatus.RequestCanceled);
r.SetCompleted (false, wexc);
r.DoCallback ();
} catch {}
}
asyncRead = null;
}
if (writeStream != null) {
try {
writeStream.Close ();
writeStream = null;
} catch {}
}
if (webResponse != null) {
try {
webResponse.Close ();
webResponse = null;
} catch {}
}
}
void ISerializable.GetObjectData (SerializationInfo serializationInfo,
StreamingContext streamingContext)
{
GetObjectData (serializationInfo, streamingContext);
}
protected override void GetObjectData (SerializationInfo serializationInfo,
StreamingContext streamingContext)
{
SerializationInfo info = serializationInfo;
info.AddValue ("requestUri", requestUri, typeof (Uri));
info.AddValue ("actualUri", actualUri, typeof (Uri));
info.AddValue ("allowAutoRedirect", allowAutoRedirect);
info.AddValue ("allowBuffering", allowBuffering);
info.AddValue ("certificates", certificates, typeof (X509CertificateCollection));
info.AddValue ("connectionGroup", connectionGroup);
info.AddValue ("contentLength", contentLength);
info.AddValue ("webHeaders", webHeaders, typeof (WebHeaderCollection));
info.AddValue ("keepAlive", keepAlive);
info.AddValue ("maxAutoRedirect", maxAutoRedirect);
info.AddValue ("mediaType", mediaType);
info.AddValue ("method", method);
info.AddValue ("initialMethod", initialMethod);
info.AddValue ("pipelined", pipelined);
info.AddValue ("version", version, typeof (Version));
info.AddValue ("proxy", proxy, typeof (IWebProxy));
info.AddValue ("sendChunked", sendChunked);
info.AddValue ("timeout", timeout);
info.AddValue ("redirects", redirects);
}
void CheckRequestStarted ()
{
if (requestSent)
throw new InvalidOperationException ("request started");
}
internal void DoContinueDelegate (int statusCode, WebHeaderCollection headers)
{
if (continueDelegate != null)
continueDelegate (statusCode, headers);
}
bool Redirect (WebAsyncResult result, HttpStatusCode code)
{
redirects++;
Exception e = null;
string uriString = null;
switch (code) {
case HttpStatusCode.Ambiguous: // 300
e = new WebException ("Ambiguous redirect.");
break;
case HttpStatusCode.MovedPermanently: // 301
case HttpStatusCode.Redirect: // 302
case HttpStatusCode.TemporaryRedirect: // 307
/* MS follows the redirect for POST too
if (method != "GET" && method != "HEAD") // 10.3
return false;
*/
contentLength = -1;
bodyBufferLength = 0;
bodyBuffer = null;
method = "GET";
uriString = webResponse.Headers ["Location"];
break;
case HttpStatusCode.SeeOther: //303
method = "GET";
uriString = webResponse.Headers ["Location"];
break;
case HttpStatusCode.NotModified: // 304
return false;
case HttpStatusCode.UseProxy: // 305
e = new NotImplementedException ("Proxy support not available.");
break;
case HttpStatusCode.Unused: // 306
default:
e = new ProtocolViolationException ("Invalid status code: " + (int) code);
break;
}
if (e != null)
throw e;
if (uriString == null)
throw new WebException ("No Location header found for " + (int) code,
WebExceptionStatus.ProtocolError);
Uri prev = actualUri;
try {
actualUri = new Uri (actualUri, uriString);
} catch (Exception) {
throw new WebException (String.Format ("Invalid URL ({0}) for {1}",
uriString, (int) code),
WebExceptionStatus.ProtocolError);
}
hostChanged = (actualUri.Scheme != prev.Scheme || actualUri.Host != prev.Host ||
actualUri.Port != prev.Port);
return true;
}
string GetHeaders ()
{
bool continue100 = false;
if (sendChunked) {
continue100 = true;
webHeaders.RemoveAndAdd ("Transfer-Encoding", "chunked");
webHeaders.RemoveInternal ("Content-Length");
} else if (contentLength != -1) {
if (contentLength > 0)
continue100 = true;
webHeaders.SetInternal ("Content-Length", contentLength.ToString ());
webHeaders.RemoveInternal ("Transfer-Encoding");
}
if (actualVersion == HttpVersion.Version11 && continue100 &&
servicePoint.SendContinue) { // RFC2616 8.2.3
webHeaders.RemoveAndAdd ("Expect" , "100-continue");
expectContinue = true;
} else {
webHeaders.RemoveInternal ("Expect");
expectContinue = false;
}
bool proxy_query = ProxyQuery;
string connectionHeader = (proxy_query) ? "Proxy-Connection" : "Connection";
webHeaders.RemoveInternal ((!proxy_query) ? "Proxy-Connection" : "Connection");
Version proto_version = servicePoint.ProtocolVersion;
bool spoint10 = (proto_version == null || proto_version == HttpVersion.Version10);
if (keepAlive && (version == HttpVersion.Version10 || spoint10)) {
webHeaders.RemoveAndAdd (connectionHeader, "keep-alive");
} else if (!keepAlive && version == HttpVersion.Version11) {
webHeaders.RemoveAndAdd (connectionHeader, "close");
}
webHeaders.SetInternal ("Host", actualUri.Authority);
if (cookieContainer != null) {
string cookieHeader = cookieContainer.GetCookieHeader (actualUri);
if (cookieHeader != "")
webHeaders.SetInternal ("Cookie", cookieHeader);
}
string accept_encoding = null;
if ((auto_decomp & DecompressionMethods.GZip) != 0)
accept_encoding = "gzip";
if ((auto_decomp & DecompressionMethods.Deflate) != 0)
accept_encoding = accept_encoding != null ? "gzip, deflate" : "deflate";
if (accept_encoding != null)
webHeaders.RemoveAndAdd ("Accept-Encoding", accept_encoding);
if (!usedPreAuth && preAuthenticate)
DoPreAuthenticate ();
return webHeaders.ToString ();
}
void DoPreAuthenticate ()
{
bool isProxy = (proxy != null && !proxy.IsBypassed (actualUri));
ICredentials creds = (!isProxy || credentials != null) ? credentials : proxy.Credentials;
Authorization auth = AuthenticationManager.PreAuthenticate (this, creds);
if (auth == null)
return;
webHeaders.RemoveInternal ("Proxy-Authorization");
webHeaders.RemoveInternal ("Authorization");
string authHeader = (isProxy && credentials == null) ? "Proxy-Authorization" : "Authorization";
webHeaders [authHeader] = auth.Message;
usedPreAuth = true;
}
internal void SetWriteStreamError (WebExceptionStatus status, Exception exc)
{
if (Aborted)
return;
WebAsyncResult r = asyncWrite;
if (r == null)
r = asyncRead;
if (r != null) {
string msg;
WebException wex;
if (exc == null) {
msg = "Error: " + status;
wex = new WebException (msg, status);
} else {
msg = String.Format ("Error: {0} ({1})", status, exc.Message);
wex = new WebException (msg, exc, status);
}
r.SetCompleted (false, wex);
r.DoCallback ();
}
}
internal void SendRequestHeaders (bool propagate_error)
{
StringBuilder req = new StringBuilder ();
string query;
if (!ProxyQuery) {
query = actualUri.PathAndQuery;
} else if (actualUri.IsDefaultPort) {
query = String.Format ("{0}://{1}{2}", actualUri.Scheme,
actualUri.Host,
actualUri.PathAndQuery);
} else {
query = String.Format ("{0}://{1}:{2}{3}", actualUri.Scheme,
actualUri.Host,
actualUri.Port,
actualUri.PathAndQuery);
}
if (servicePoint.ProtocolVersion != null && servicePoint.ProtocolVersion < version) {
actualVersion = servicePoint.ProtocolVersion;
} else {
actualVersion = version;
}
req.AppendFormat ("{0} {1} HTTP/{2}.{3}\r\n", method, query,
actualVersion.Major, actualVersion.Minor);
req.Append (GetHeaders ());
string reqstr = req.ToString ();
byte [] bytes = Encoding.UTF8.GetBytes (reqstr);
try {
writeStream.SetHeaders (bytes);
} catch (WebException wexc) {
SetWriteStreamError (wexc.Status, wexc);
if (propagate_error)
throw;
} catch (Exception exc) {
SetWriteStreamError (WebExceptionStatus.SendFailure, exc);
if (propagate_error)
throw;
}
}
internal void SetWriteStream (WebConnectionStream stream)
{
if (Aborted)
return;
writeStream = stream;
if (bodyBuffer != null) {
webHeaders.RemoveInternal ("Transfer-Encoding");
contentLength = bodyBufferLength;
writeStream.SendChunked = false;
}
SendRequestHeaders (false);
haveRequest = true;
if (bodyBuffer != null) {
// The body has been written and buffered. The request "user"
// won't write it again, so we must do it.
writeStream.Write (bodyBuffer, 0, bodyBufferLength);
bodyBuffer = null;
writeStream.Close ();
} else if (method != "HEAD" && method != "GET" && method != "MKCOL" && method != "CONNECT" &&
method != "DELETE" && method != "TRACE") {
if (getResponseCalled && !writeStream.RequestWritten)
writeStream.WriteRequest ();
}
if (asyncWrite != null) {
asyncWrite.SetCompleted (false, stream);
asyncWrite.DoCallback ();
asyncWrite = null;
}
}
internal void SetResponseError (WebExceptionStatus status, Exception e, string where)
{
if (Aborted)
return;
lock (locker) {
string msg = String.Format ("Error getting response stream ({0}): {1}", where, status);
WebAsyncResult r = asyncRead;
if (r == null)
r = asyncWrite;
WebException wexc;
if (e is WebException) {
wexc = (WebException) e;
} else {
wexc = new WebException (msg, e, status, null);
}
if (r != null) {
if (!r.IsCompleted) {
r.SetCompleted (false, wexc);
r.DoCallback ();
} else if (r == asyncWrite) {
saved_exc = wexc;
}
haveResponse = true;
asyncRead = null;
asyncWrite = null;
} else {
haveResponse = true;
saved_exc = wexc;
}
}
}
void CheckSendError (WebConnectionData data)
{
// Got here, but no one called GetResponse
int status = data.StatusCode;
if (status < 400 || status == 401 || status == 407)
return;
if (writeStream != null && asyncRead == null && !writeStream.CompleteRequestWritten) {
// The request has not been completely sent and we got here!
// We should probably just close and cause an error in any case,
saved_exc = new WebException (data.StatusDescription, null, WebExceptionStatus.ProtocolError, webResponse);
webResponse.ReadAll ();
}
}
void HandleNtlmAuth (WebAsyncResult r)
{
WebConnectionStream wce = webResponse.GetResponseStream () as WebConnectionStream;
if (wce != null) {
WebConnection cnc = wce.Connection;
cnc.PriorityRequest = this;
bool isProxy = (proxy != null && !proxy.IsBypassed (actualUri));
ICredentials creds = (!isProxy) ? credentials : proxy.Credentials;
if (creds != null) {
cnc.NtlmCredential = creds.GetCredential (requestUri, "NTLM");
cnc.UnsafeAuthenticatedConnectionSharing = unsafe_auth_blah;
}
}
r.Reset ();
haveResponse = false;
webResponse.ReadAll ();
webResponse = null;
}
internal void SetResponseData (WebConnectionData data)
{
lock (locker) {
if (Aborted) {
if (data.stream != null)
data.stream.Close ();
return;
}
WebException wexc = null;
try {
webResponse = new HttpWebResponse (actualUri, method, data, cookieContainer);
} catch (Exception e) {
wexc = new WebException (e.Message, e, WebExceptionStatus.ProtocolError, null);
if (data.stream != null)
data.stream.Close ();
}
if (wexc == null && (method == "POST" || method == "PUT")) {
lock (locker) {
CheckSendError (data);
if (saved_exc != null)
wexc = (WebException) saved_exc;
}
}
WebAsyncResult r = asyncRead;
bool forced = false;
if (r == null && webResponse != null) {
// This is a forced completion (302, 204)...
forced = true;
r = new WebAsyncResult (null, null);
r.SetCompleted (false, webResponse);
}
if (r != null) {
if (wexc != null) {
r.SetCompleted (false, wexc);
r.DoCallback ();
return;
}
bool redirected;
try {
redirected = CheckFinalStatus (r);
if (!redirected) {
if (is_ntlm_auth && authCompleted && webResponse != null
&& (int)webResponse.StatusCode < 400) {
WebConnectionStream wce = webResponse.GetResponseStream () as WebConnectionStream;
if (wce != null) {
WebConnection cnc = wce.Connection;
cnc.NtlmAuthenticated = true;
}
}
// clear internal buffer so that it does not
// hold possible big buffer (bug #397627)
if (writeStream != null)
writeStream.KillBuffer ();
haveResponse = true;
r.SetCompleted (false, webResponse);
r.DoCallback ();
} else {
if (webResponse != null) {
if (is_ntlm_auth) {
HandleNtlmAuth (r);
return;
}
webResponse.Close ();
}
finished_reading = false;
haveResponse = false;
webResponse = null;
r.Reset ();
servicePoint = GetServicePoint ();
abortHandler = servicePoint.SendRequest (this, connectionGroup);
}
} catch (WebException wexc2) {
if (forced) {
saved_exc = wexc2;
haveResponse = true;
}
r.SetCompleted (false, wexc2);
r.DoCallback ();
return;
} catch (Exception ex) {
wexc = new WebException (ex.Message, ex, WebExceptionStatus.ProtocolError, null);
if (forced) {
saved_exc = wexc;
haveResponse = true;
}
r.SetCompleted (false, wexc);
r.DoCallback ();
return;
}
}
}
}
bool CheckAuthorization (WebResponse response, HttpStatusCode code)
{
authCompleted = false;
if (code == HttpStatusCode.Unauthorized && credentials == null)
return false;
bool isProxy = (code == HttpStatusCode.ProxyAuthenticationRequired);
if (isProxy && (proxy == null || proxy.Credentials == null))
return false;
string [] authHeaders = response.Headers.GetValues ( (isProxy) ? "Proxy-Authenticate" : "WWW-Authenticate");
if (authHeaders == null || authHeaders.Length == 0)
return false;
ICredentials creds = (!isProxy) ? credentials : proxy.Credentials;
Authorization auth = null;
foreach (string authHeader in authHeaders) {
auth = AuthenticationManager.Authenticate (authHeader, this, creds);
if (auth != null)
break;
}
if (auth == null)
return false;
webHeaders [(isProxy) ? "Proxy-Authorization" : "Authorization"] = auth.Message;
authCompleted = auth.Complete;
is_ntlm_auth = (auth.Module.AuthenticationType == "NTLM");
return true;
}
// Returns true if redirected
bool CheckFinalStatus (WebAsyncResult result)
{
if (result.GotException)
throw result.Exception;
Exception throwMe = result.Exception;
bodyBuffer = null;
HttpWebResponse resp = result.Response;
WebExceptionStatus protoError = WebExceptionStatus.ProtocolError;
HttpStatusCode code = 0;
if (throwMe == null && webResponse != null) {
code = webResponse.StatusCode;
if (!authCompleted && ((code == HttpStatusCode.Unauthorized && credentials != null) ||
(ProxyQuery && code == HttpStatusCode.ProxyAuthenticationRequired))) {
if (!usedPreAuth && CheckAuthorization (webResponse, code)) {
// Keep the written body, so it can be rewritten in the retry
if (InternalAllowBuffering) {
bodyBuffer = writeStream.WriteBuffer;
bodyBufferLength = writeStream.WriteBufferLength;
return true;
} else if (method != "PUT" && method != "POST") {
return true;
}
writeStream.InternalClose ();
writeStream = null;
webResponse.Close ();
webResponse = null;
throw new WebException ("This request requires buffering " +
"of data for authentication or " +
"redirection to be sucessful.");
}
}
if ((int) code >= 400) {
string err = String.Format ("The remote server returned an error: ({0}) {1}.",
(int) code, webResponse.StatusDescription);
throwMe = new WebException (err, null, protoError, webResponse);
webResponse.ReadAll ();
} else if ((int) code == 304 && allowAutoRedirect) {
string err = String.Format ("The remote server returned an error: ({0}) {1}.",
(int) code, webResponse.StatusDescription);
throwMe = new WebException (err, null, protoError, webResponse);
} else if ((int) code >= 300 && allowAutoRedirect && redirects >= maxAutoRedirect) {
throwMe = new WebException ("Max. redirections exceeded.", null,
protoError, webResponse);
webResponse.ReadAll ();
}
}
if (throwMe == null) {
bool b = false;
int c = (int) code;
if (allowAutoRedirect && c >= 300) {
if (InternalAllowBuffering && writeStream.WriteBufferLength > 0) {
bodyBuffer = writeStream.WriteBuffer;
bodyBufferLength = writeStream.WriteBufferLength;
}
b = Redirect (result, code);
}
if (resp != null && c >= 300 && c != 304)
resp.ReadAll ();
return b;
}
if (writeStream != null) {
writeStream.InternalClose ();
writeStream = null;
}
webResponse = null;
throw throwMe;
}
}
}
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