private static void InterruptCallback(TimerThread.Timer timer, int timeNoticed, object context) { AutoWebProxyScriptWrapper pThis = (AutoWebProxyScriptWrapper)context; GlobalLog.Print("AutoWebProxyScriptWrapper#" + ValidationHelper.HashString(pThis) + "::InterruptCallback()"); if (!object.ReferenceEquals(timer, pThis.activeTimer)) { GlobalLog.Print("AutoWebProxyScriptWrapper#" + ValidationHelper.HashString(pThis) + "::InterruptCallback() Spurious - returning."); return; } EXCEPINFO exceptionInfo; try { pThis.jscript.InterruptScriptThread(pThis.interruptThreadId, out exceptionInfo, 0); } catch (Exception ex) { if (NclUtilities.IsFatal(ex)) { throw; } GlobalLog.Print("AutoWebProxyScriptWrapper#" + ValidationHelper.HashString(pThis) + "::InterruptCallback() InterruptScriptThread() threw:" + ValidationHelper.ToString(ex)); } catch { GlobalLog.Print("AutoWebProxyScriptWrapper#" + ValidationHelper.HashString(pThis) + "::InterruptCallback() InterruptScriptThread() threw: Non-CLS Compliant Exception"); } }
void UpdateScriptInstance(AutoWebProxyScriptWrapper newScriptInstance) { GlobalLog.Print("AutoWebProxyScriptEngine#" + ValidationHelper.HashString(this) + "::UpdateScriptInstance() updating scriptInstance#" + ValidationHelper.HashString(scriptInstance) + " to newScriptInstance#" + ValidationHelper.HashString(newScriptInstance)); if (scriptInstance == newScriptInstance) { return; } if (scriptInstance != null) { GlobalLog.Print("AutoWebProxyScriptEngine#" + ValidationHelper.HashString(this) + "::UpdateScriptInstance() Closing engine."); scriptInstance.Close(); } scriptInstance = newScriptInstance; }
// Downloads and compiles the script from a given Uri. // This code can be called by config for a downloaded control, we need to assert. // This code is called holding the lock. private AutoWebProxyState DownloadAndCompile(Uri location) { GlobalLog.Print("NetWebProxyFinder#" + ValidationHelper.HashString(this) + "::DownloadAndCompile() location:" + ValidationHelper.ToString(location)); AutoWebProxyState newState = AutoWebProxyState.DownloadFailure; WebResponse response = null; TimerThread.Timer timer = null; AutoWebProxyScriptWrapper newScriptInstance = null; // Can't assert this in declarative form (DCR?). This Assert() is needed to be able to create the request to download the proxy script. ExceptionHelper.WebPermissionUnrestricted.Assert(); try { lock (lockObject) { if (aborted) { throw new WebException(NetRes.GetWebStatusString("net_requestaborted", WebExceptionStatus.RequestCanceled), WebExceptionStatus.RequestCanceled); } request = WebRequest.Create(location); } request.Timeout = Timeout.Infinite; request.CachePolicy = new RequestCachePolicy(RequestCacheLevel.Default); request.ConnectionGroupName = "__WebProxyScript"; // We have an opportunity here, if caching is disabled AppDomain-wide, to override it with a // custom, trivial cache-provider to get a similar semantic. // // We also want to have a backup caching key in the case when IE has locked an expired script response // if (request.CacheProtocol != null) { GlobalLog.Print("NetWebProxyFinder#" + ValidationHelper.HashString(this) + "::DownloadAndCompile() Using backup caching."); request.CacheProtocol = new RequestCacheProtocol(backupCache, request.CacheProtocol.Validator); } HttpWebRequest httpWebRequest = request as HttpWebRequest; if (httpWebRequest != null) { httpWebRequest.Accept = "*/*"; httpWebRequest.UserAgent = this.GetType().FullName + "/" + Environment.Version; httpWebRequest.KeepAlive = false; httpWebRequest.Pipelined = false; httpWebRequest.InternalConnectionGroup = true; } else { FtpWebRequest ftpWebRequest = request as FtpWebRequest; if (ftpWebRequest != null) { ftpWebRequest.KeepAlive = false; } } // Use no proxy, default cache - initiate the download. request.Proxy = null; request.Credentials = Engine.Credentials; // Use our own timeout timer so that it can encompass the whole request, not just the headers. if (timerQueue == null) { timerQueue = TimerThread.GetOrCreateQueue(SettingsSectionInternal.Section.DownloadTimeout); } timer = timerQueue.CreateTimer(timerCallback, request); response = request.GetResponse(); // Check Last Modified. DateTime lastModified = DateTime.MinValue; HttpWebResponse httpResponse = response as HttpWebResponse; if (httpResponse != null) { lastModified = httpResponse.LastModified; } else { FtpWebResponse ftpResponse = response as FtpWebResponse; if (ftpResponse != null) { lastModified = ftpResponse.LastModified; } } GlobalLog.Print("NetWebProxyFinder#" + ValidationHelper.HashString(this) + "::DownloadAndCompile() lastModified:" + lastModified.ToString() + " (script):" + (scriptInstance == null ? "(null)" : scriptInstance.LastModified.ToString())); if (scriptInstance != null && lastModified != DateTime.MinValue && scriptInstance.LastModified == lastModified) { newScriptInstance = scriptInstance; newState = AutoWebProxyState.Completed; } else { string scriptBody = null; byte[] scriptBuffer = null; using (Stream responseStream = response.GetResponseStream()) { SingleItemRequestCache.ReadOnlyStream ros = responseStream as SingleItemRequestCache.ReadOnlyStream; if (ros != null) { scriptBuffer = ros.Buffer; } if (scriptInstance != null && scriptBuffer != null && scriptBuffer == scriptInstance.Buffer) { scriptInstance.LastModified = lastModified; newScriptInstance = scriptInstance; newState = AutoWebProxyState.Completed; GlobalLog.Print("NetWebProxyFinder#" + ValidationHelper.HashString(this) + "::DownloadAndCompile() Buffer matched - reusing Engine."); } else { using (StreamReader streamReader = new StreamReader(responseStream)) { scriptBody = streamReader.ReadToEnd(); } } } WebResponse tempResponse = response; response = null; tempResponse.Close(); timer.Cancel(); timer = null; if (newState != AutoWebProxyState.Completed) { GlobalLog.Print("NetWebProxyFinder#" + ValidationHelper.HashString(this) + "::DownloadAndCompile() IsFromCache:" + tempResponse.IsFromCache.ToString() + " scriptInstance:" + ValidationHelper.HashString(scriptInstance)); if (scriptInstance != null && scriptBody == scriptInstance.ScriptBody) { GlobalLog.Print("NetWebProxyFinder#" + ValidationHelper.HashString(this) + "::DownloadAndCompile() Script matched - using existing Engine."); scriptInstance.LastModified = lastModified; if (scriptBuffer != null) { scriptInstance.Buffer = scriptBuffer; } newScriptInstance = scriptInstance; newState = AutoWebProxyState.Completed; } else { GlobalLog.Print("NetWebProxyFinder#" + ValidationHelper.HashString(this) + "::DownloadAndCompile() Creating AutoWebProxyScriptWrapper."); newScriptInstance = new AutoWebProxyScriptWrapper(); newScriptInstance.LastModified = lastModified; if (newScriptInstance.Compile(location, scriptBody, scriptBuffer)) { newState = AutoWebProxyState.Completed; } else { newState = AutoWebProxyState.CompilationFailure; } } } } } catch (Exception exception) { if (Logging.On) { Logging.PrintWarning(Logging.Web, SR.GetString(SR.net_log_proxy_script_download_compile_error, exception)); } GlobalLog.Print("NetWebProxyFinder#" + ValidationHelper.HashString(this) + "::DownloadAndCompile() Download() threw:" + ValidationHelper.ToString(exception)); } finally { if (timer != null) { timer.Cancel(); } // try { if (response != null) { response.Close(); } } finally { WebPermission.RevertAssert(); // The request is not needed anymore. Set it to null, so if Abort() gets called, // after this point, it will result in a no-op. request = null; } } if ((newState == AutoWebProxyState.Completed) && (scriptInstance != newScriptInstance)) { if (scriptInstance != null) { scriptInstance.Close(); } scriptInstance = newScriptInstance; } GlobalLog.Print("NetWebProxyFinder#" + ValidationHelper.HashString(this) + "::DownloadAndCompile() retuning newState:" + ValidationHelper.ToString(newState)); return(newState); }
// Ensures that (if state is AutoWebProxyState.CompilationSuccess) there is an engine available to execute script. // Figures out the script location (might discover if needed). // Calls DownloadAndCompile(). private void EnsureEngineAvailable() { GlobalLog.Enter("NetWebProxyFinder#" + ValidationHelper.HashString(this) + "::EnsureEngineAvailable"); if (State == AutoWebProxyState.Uninitialized || engineScriptLocation == null) { #if !FEATURE_PAL if (Engine.AutomaticallyDetectSettings) { GlobalLog.Print("NetWebProxyFinder#" + ValidationHelper.HashString(this) + "::EnsureEngineAvailable() Attempting auto-detection."); DetectScriptLocation(); if (scriptLocation != null) { // // Successfully detected or user has flipped the automaticallyDetectSettings bit. // Attempt a non conclusive DownloadAndCompile() so we can fallback // GlobalLog.Print("NetWebProxyFinder#" + ValidationHelper.HashString(this) + "::EnsureEngineAvailable() discovered:" + ValidationHelper.ToString(scriptLocation) + " engineScriptLocation:" + ValidationHelper.ToString(engineScriptLocation)); if (scriptLocation.Equals(engineScriptLocation)) { State = AutoWebProxyState.Completed; GlobalLog.Leave("NetWebProxyFinder#" + ValidationHelper.HashString(this) + "::EnsureEngineAvailable", ValidationHelper.ToString(State)); return; } AutoWebProxyState newState = DownloadAndCompile(scriptLocation); if (newState == AutoWebProxyState.Completed) { State = AutoWebProxyState.Completed; engineScriptLocation = scriptLocation; GlobalLog.Leave("NetWebProxyFinder#" + ValidationHelper.HashString(this) + "::EnsureEngineAvailable", ValidationHelper.ToString(State)); return; } } } #endif // !FEATURE_PAL // Either Auto-Detect wasn't enabled or something failed with it. Try the manual script location. if ((Engine.AutomaticConfigurationScript != null) && !aborted) { GlobalLog.Print("NetWebProxyFinder#" + ValidationHelper.HashString(this) + "::EnsureEngineAvailable() using automaticConfigurationScript:" + ValidationHelper.ToString(Engine.AutomaticConfigurationScript) + " engineScriptLocation:" + ValidationHelper.ToString(engineScriptLocation)); if (Engine.AutomaticConfigurationScript.Equals(engineScriptLocation)) { State = AutoWebProxyState.Completed; GlobalLog.Leave("NetWebProxyFinder#" + ValidationHelper.HashString(this) + "::EnsureEngineAvailable", ValidationHelper.ToString(State)); return; } State = DownloadAndCompile(Engine.AutomaticConfigurationScript); if (State == AutoWebProxyState.Completed) { engineScriptLocation = Engine.AutomaticConfigurationScript; GlobalLog.Leave("NetWebProxyFinder#" + ValidationHelper.HashString(this) + "::EnsureEngineAvailable", ValidationHelper.ToString(State)); return; } } } else { // We always want to call DownloadAndCompile to check the expiration. GlobalLog.Print("NetWebProxyFinder#" + ValidationHelper.HashString(this) + "::EnsureEngineAvailable() State:" + State + " engineScriptLocation:" + ValidationHelper.ToString(engineScriptLocation)); State = DownloadAndCompile(engineScriptLocation); if (State == AutoWebProxyState.Completed) { GlobalLog.Leave("NetWebProxyFinder#" + ValidationHelper.HashString(this) + "::EnsureEngineAvailable", ValidationHelper.ToString(State)); return; } // There's still an opportunity to fail over to the automaticConfigurationScript. if (!engineScriptLocation.Equals(Engine.AutomaticConfigurationScript) && !aborted) { GlobalLog.Print("NetWebProxyFinder#" + ValidationHelper.HashString(this) + "::EnsureEngineAvailable() Update failed. Falling back to automaticConfigurationScript:" + ValidationHelper.ToString(Engine.AutomaticConfigurationScript)); State = DownloadAndCompile(Engine.AutomaticConfigurationScript); if (State == AutoWebProxyState.Completed) { engineScriptLocation = Engine.AutomaticConfigurationScript; GlobalLog.Leave("NetWebProxyFinder#" + ValidationHelper.HashString(this) + "::EnsureEngineAvailable", ValidationHelper.ToString(State)); return; } } } // Everything failed. Set this instance to mostly-dead. It will wake up again if there's a reg/connectoid change. GlobalLog.Print("NetWebProxyFinder#" + ValidationHelper.HashString(this) + "::EnsureEngineAvailable() All failed."); State = AutoWebProxyState.DiscoveryFailure; if (scriptInstance != null) { scriptInstance.Close(); scriptInstance = null; } engineScriptLocation = null; GlobalLog.Leave("NetWebProxyFinder#" + ValidationHelper.HashString(this) + "::EnsureEngineAvailable", ValidationHelper.ToString(State)); }
/// <devdoc> /// <para> /// Downloads and compiles the script from a given Uri. /// This code can be called by config for a downloaded control, we need to assert. /// This code is called holding the lock. /// </para> /// </devdoc> private AutoWebProxyState DownloadAndCompile(Uri location, out AutoWebProxyScriptWrapper newScriptInstance, ref int syncStatus) { GlobalLog.Print("AutoWebProxyScriptEngine#" + ValidationHelper.HashString(this) + "::DownloadAndCompile() location:" + ValidationHelper.ToString(location)); AutoWebProxyState newState = AutoWebProxyState.DownloadFailure; WebResponse response = null; TimerThread.Timer timer = null; newScriptInstance = null; // Can't assert this in declarative form (DCR?). This Assert() is needed to be able to create the request to download the proxy script. ExceptionHelper.WebPermissionUnrestricted.Assert(); try { // here we have a reentrance issue due to config load. WebRequest request = WebRequest.Create(location); request.Timeout = Timeout.Infinite; request.CachePolicy = new RequestCachePolicy(RequestCacheLevel.Default); request.ConnectionGroupName = "__WebProxyScript"; // We have an opportunity here, if caching is disabled AppDomain-wide, to override it with a // custom, trivial cache-provider to get a similar semantic. // // We also want to have a backup caching key in the case when IE has locked an expired script response // if (request.CacheProtocol != null) { GlobalLog.Print("AutoWebProxyScriptEngine#" + ValidationHelper.HashString(this) + "::DownloadAndCompile() Using backup caching."); request.CacheProtocol = new RequestCacheProtocol(backupCache, request.CacheProtocol.Validator); } HttpWebRequest httpWebRequest = request as HttpWebRequest; if (httpWebRequest!=null) { httpWebRequest.Accept = "*/*"; httpWebRequest.UserAgent = this.GetType().FullName + "/" + Environment.Version; httpWebRequest.KeepAlive = false; httpWebRequest.Pipelined = false; httpWebRequest.InternalConnectionGroup = true; } else { FtpWebRequest ftpWebRequest = request as FtpWebRequest; if (ftpWebRequest!=null) { ftpWebRequest.KeepAlive = false; } } // Use no proxy, default cache - initiate the download. request.Proxy = null; request.Credentials = webProxy.Credentials; // Set this up with the abortable lock to abort this too. LockRequest(request, ref syncStatus); if (syncStatus != SyncStatus.RequestOwner) { throw new WebException(NetRes.GetWebStatusString("net_requestaborted", WebExceptionStatus.RequestCanceled), WebExceptionStatus.RequestCanceled); } // Use our own timeout timer so that it can encompass the whole request, not just the headers. if (s_TimerQueue == null) { s_TimerQueue = TimerThread.GetOrCreateQueue(SettingsSectionInternal.Section.DownloadTimeout); } timer = s_TimerQueue.CreateTimer(s_TimerCallback, request); response = request.GetResponse(); // Check Last Modified. DateTime lastModified = DateTime.MinValue; HttpWebResponse httpResponse = response as HttpWebResponse; if (httpResponse != null) { lastModified = httpResponse.LastModified; } else { FtpWebResponse ftpResponse = response as FtpWebResponse; if (ftpResponse != null) { lastModified = ftpResponse.LastModified; } } GlobalLog.Print("AutoWebProxyScriptEngine#" + ValidationHelper.HashString(this) + "::DownloadAndCompile() lastModified:" + lastModified.ToString() + " (script):" + (scriptInstance == null ? "(null)" : scriptInstance.LastModified.ToString())); if (scriptInstance != null && lastModified != DateTime.MinValue && scriptInstance.LastModified == lastModified) { newScriptInstance = scriptInstance; newState = AutoWebProxyState.CompilationSuccess; } else { string scriptBody = null; byte[] scriptBuffer = null; using (Stream responseStream = response.GetResponseStream()) { SingleItemRequestCache.ReadOnlyStream ros = responseStream as SingleItemRequestCache.ReadOnlyStream; if (ros != null) { scriptBuffer = ros.Buffer; } if (scriptInstance != null && scriptBuffer != null && scriptBuffer == scriptInstance.Buffer) { scriptInstance.LastModified = lastModified; newScriptInstance = scriptInstance; newState = AutoWebProxyState.CompilationSuccess; GlobalLog.Print("AutoWebProxyScriptEngine#" + ValidationHelper.HashString(this) + "::DownloadAndCompile() Buffer matched - reusing engine."); } else { using (StreamReader streamReader = new StreamReader(responseStream)) { scriptBody = streamReader.ReadToEnd(); } } } WebResponse tempResponse = response; response = null; tempResponse.Close(); timer.Cancel(); timer = null; if (newState != AutoWebProxyState.CompilationSuccess) { newState = AutoWebProxyState.DownloadSuccess; GlobalLog.Print("AutoWebProxyScriptEngine#" + ValidationHelper.HashString(this) + "::DownloadAndCompile() IsFromCache:" + tempResponse.IsFromCache.ToString() + " scriptInstance:" + ValidationHelper.HashString(scriptInstance)); if (scriptInstance != null && scriptBody == scriptInstance.ScriptBody) { GlobalLog.Print("AutoWebProxyScriptEngine#" + ValidationHelper.HashString(this) + "::DownloadAndCompile() Script matched - using existing engine."); scriptInstance.LastModified = lastModified; if (scriptBuffer != null) { scriptInstance.Buffer = scriptBuffer; } newScriptInstance = scriptInstance; newState = AutoWebProxyState.CompilationSuccess; } else { GlobalLog.Print("AutoWebProxyScriptEngine#" + ValidationHelper.HashString(this) + "::DownloadAndCompile() Creating AutoWebProxyScriptWrapper."); newScriptInstance = new AutoWebProxyScriptWrapper(); newScriptInstance.LastModified = lastModified; newState = newScriptInstance.Compile(location, scriptBody, scriptBuffer); } } } } catch (Exception exception) { if (NclUtilities.IsFatal(exception)) throw; if(Logging.On)Logging.PrintWarning(Logging.Web, SR.GetString(SR.net_log_proxy_script_download_compile_error, exception)); GlobalLog.Print("AutoWebProxyScriptEngine#" + ValidationHelper.HashString(this) + "::DownloadAndCompile() Download() threw:" + ValidationHelper.ToString(exception)); } finally { if (timer != null) { timer.Cancel(); } // try { if (response != null) { response.Close(); } } finally { WebPermission.RevertAssert(); } } if (newState!=AutoWebProxyState.CompilationSuccess) { newScriptInstance = null; } GlobalLog.Print("AutoWebProxyScriptEngine#" + ValidationHelper.HashString(this) + "::DownloadAndCompile() retuning newState:" + ValidationHelper.ToString(newState)); return newState; }
void UpdateScriptInstance(AutoWebProxyScriptWrapper newScriptInstance) { GlobalLog.Print("AutoWebProxyScriptEngine#" + ValidationHelper.HashString(this) + "::UpdateScriptInstance() updating scriptInstance#" + ValidationHelper.HashString(scriptInstance) + " to newScriptInstance#" + ValidationHelper.HashString(newScriptInstance)); if (scriptInstance == newScriptInstance) { return; } if (scriptInstance!=null) { GlobalLog.Print("AutoWebProxyScriptEngine#" + ValidationHelper.HashString(this) + "::UpdateScriptInstance() Closing engine."); scriptInstance.Close(); } scriptInstance = newScriptInstance; }
private BaseWebProxyFinder.AutoWebProxyState DownloadAndCompile(Uri location) { BaseWebProxyFinder.AutoWebProxyState downloadFailure = BaseWebProxyFinder.AutoWebProxyState.DownloadFailure; WebResponse response = null; TimerThread.Timer timer = null; AutoWebProxyScriptWrapper scriptInstance = null; ExceptionHelper.WebPermissionUnrestricted.Assert(); try { lock (this.lockObject) { if (this.aborted) { throw new WebException(NetRes.GetWebStatusString("net_requestaborted", WebExceptionStatus.RequestCanceled), WebExceptionStatus.RequestCanceled); } this.request = WebRequest.Create(location); } this.request.Timeout = -1; this.request.CachePolicy = new RequestCachePolicy(RequestCacheLevel.Default); this.request.ConnectionGroupName = "__WebProxyScript"; if (this.request.CacheProtocol != null) { this.request.CacheProtocol = new RequestCacheProtocol(this.backupCache, this.request.CacheProtocol.Validator); } HttpWebRequest request = this.request as HttpWebRequest; if (request != null) { request.Accept = "*/*"; request.UserAgent = base.GetType().FullName + "/" + Environment.Version; request.KeepAlive = false; request.Pipelined = false; request.InternalConnectionGroup = true; } else { FtpWebRequest request2 = this.request as FtpWebRequest; if (request2 != null) { request2.KeepAlive = false; } } this.request.Proxy = null; this.request.Credentials = base.Engine.Credentials; if (timerQueue == null) { timerQueue = TimerThread.GetOrCreateQueue(SettingsSectionInternal.Section.DownloadTimeout); } timer = timerQueue.CreateTimer(timerCallback, this.request); response = this.request.GetResponse(); DateTime minValue = DateTime.MinValue; HttpWebResponse response2 = response as HttpWebResponse; if (response2 != null) { minValue = response2.LastModified; } else { FtpWebResponse response3 = response as FtpWebResponse; if (response3 != null) { minValue = response3.LastModified; } } if (((this.scriptInstance != null) && (minValue != DateTime.MinValue)) && (this.scriptInstance.LastModified == minValue)) { scriptInstance = this.scriptInstance; downloadFailure = BaseWebProxyFinder.AutoWebProxyState.Completed; } else { string scriptBody = null; byte[] buffer = null; using (Stream stream = response.GetResponseStream()) { SingleItemRequestCache.ReadOnlyStream stream2 = stream as SingleItemRequestCache.ReadOnlyStream; if (stream2 != null) { buffer = stream2.Buffer; } if (((this.scriptInstance != null) && (buffer != null)) && (buffer == this.scriptInstance.Buffer)) { this.scriptInstance.LastModified = minValue; scriptInstance = this.scriptInstance; downloadFailure = BaseWebProxyFinder.AutoWebProxyState.Completed; } else { using (StreamReader reader = new StreamReader(stream)) { scriptBody = reader.ReadToEnd(); } } } WebResponse response4 = response; response = null; response4.Close(); timer.Cancel(); timer = null; if (downloadFailure != BaseWebProxyFinder.AutoWebProxyState.Completed) { if ((this.scriptInstance != null) && (scriptBody == this.scriptInstance.ScriptBody)) { this.scriptInstance.LastModified = minValue; if (buffer != null) { this.scriptInstance.Buffer = buffer; } scriptInstance = this.scriptInstance; downloadFailure = BaseWebProxyFinder.AutoWebProxyState.Completed; } else { scriptInstance = new AutoWebProxyScriptWrapper { LastModified = minValue }; if (scriptInstance.Compile(location, scriptBody, buffer)) { downloadFailure = BaseWebProxyFinder.AutoWebProxyState.Completed; } else { downloadFailure = BaseWebProxyFinder.AutoWebProxyState.CompilationFailure; } } } } } catch (Exception exception) { if (Logging.On) { Logging.PrintWarning(Logging.Web, SR.GetString("net_log_proxy_script_download_compile_error", new object[] { exception })); } } finally { if (timer != null) { timer.Cancel(); } try { if (response != null) { response.Close(); } } finally { CodeAccessPermission.RevertAssert(); this.request = null; } } if ((downloadFailure == BaseWebProxyFinder.AutoWebProxyState.Completed) && (this.scriptInstance != scriptInstance)) { if (this.scriptInstance != null) { this.scriptInstance.Close(); } this.scriptInstance = scriptInstance; } return(downloadFailure); }
private void EnsureEngineAvailable() { if ((base.State == BaseWebProxyFinder.AutoWebProxyState.Uninitialized) || (this.engineScriptLocation == null)) { if (base.Engine.AutomaticallyDetectSettings) { this.DetectScriptLocation(); if (this.scriptLocation != null) { if (this.scriptLocation.Equals(this.engineScriptLocation)) { base.State = BaseWebProxyFinder.AutoWebProxyState.Completed; return; } if (this.DownloadAndCompile(this.scriptLocation) == BaseWebProxyFinder.AutoWebProxyState.Completed) { base.State = BaseWebProxyFinder.AutoWebProxyState.Completed; this.engineScriptLocation = this.scriptLocation; return; } } } if ((base.Engine.AutomaticConfigurationScript != null) && !this.aborted) { if (base.Engine.AutomaticConfigurationScript.Equals(this.engineScriptLocation)) { base.State = BaseWebProxyFinder.AutoWebProxyState.Completed; return; } base.State = this.DownloadAndCompile(base.Engine.AutomaticConfigurationScript); if (base.State == BaseWebProxyFinder.AutoWebProxyState.Completed) { this.engineScriptLocation = base.Engine.AutomaticConfigurationScript; return; } } } else { base.State = this.DownloadAndCompile(this.engineScriptLocation); if (base.State == BaseWebProxyFinder.AutoWebProxyState.Completed) { return; } if (!this.engineScriptLocation.Equals(base.Engine.AutomaticConfigurationScript) && !this.aborted) { base.State = this.DownloadAndCompile(base.Engine.AutomaticConfigurationScript); if (base.State == BaseWebProxyFinder.AutoWebProxyState.Completed) { this.engineScriptLocation = base.Engine.AutomaticConfigurationScript; return; } } } base.State = BaseWebProxyFinder.AutoWebProxyState.DiscoveryFailure; if (this.scriptInstance != null) { this.scriptInstance.Close(); this.scriptInstance = null; } this.engineScriptLocation = null; }
private BaseWebProxyFinder.AutoWebProxyState DownloadAndCompile(Uri location) { BaseWebProxyFinder.AutoWebProxyState downloadFailure = BaseWebProxyFinder.AutoWebProxyState.DownloadFailure; WebResponse response = null; TimerThread.Timer timer = null; AutoWebProxyScriptWrapper scriptInstance = null; ExceptionHelper.WebPermissionUnrestricted.Assert(); try { lock (this.lockObject) { if (this.aborted) { throw new WebException(NetRes.GetWebStatusString("net_requestaborted", WebExceptionStatus.RequestCanceled), WebExceptionStatus.RequestCanceled); } this.request = WebRequest.Create(location); } this.request.Timeout = -1; this.request.CachePolicy = new RequestCachePolicy(RequestCacheLevel.Default); this.request.ConnectionGroupName = "__WebProxyScript"; if (this.request.CacheProtocol != null) { this.request.CacheProtocol = new RequestCacheProtocol(this.backupCache, this.request.CacheProtocol.Validator); } HttpWebRequest request = this.request as HttpWebRequest; if (request != null) { request.Accept = "*/*"; request.UserAgent = base.GetType().FullName + "/" + Environment.Version; request.KeepAlive = false; request.Pipelined = false; request.InternalConnectionGroup = true; } else { FtpWebRequest request2 = this.request as FtpWebRequest; if (request2 != null) { request2.KeepAlive = false; } } this.request.Proxy = null; this.request.Credentials = base.Engine.Credentials; if (timerQueue == null) { timerQueue = TimerThread.GetOrCreateQueue(SettingsSectionInternal.Section.DownloadTimeout); } timer = timerQueue.CreateTimer(timerCallback, this.request); response = this.request.GetResponse(); DateTime minValue = DateTime.MinValue; HttpWebResponse response2 = response as HttpWebResponse; if (response2 != null) { minValue = response2.LastModified; } else { FtpWebResponse response3 = response as FtpWebResponse; if (response3 != null) { minValue = response3.LastModified; } } if (((this.scriptInstance != null) && (minValue != DateTime.MinValue)) && (this.scriptInstance.LastModified == minValue)) { scriptInstance = this.scriptInstance; downloadFailure = BaseWebProxyFinder.AutoWebProxyState.Completed; } else { string scriptBody = null; byte[] buffer = null; using (Stream stream = response.GetResponseStream()) { SingleItemRequestCache.ReadOnlyStream stream2 = stream as SingleItemRequestCache.ReadOnlyStream; if (stream2 != null) { buffer = stream2.Buffer; } if (((this.scriptInstance != null) && (buffer != null)) && (buffer == this.scriptInstance.Buffer)) { this.scriptInstance.LastModified = minValue; scriptInstance = this.scriptInstance; downloadFailure = BaseWebProxyFinder.AutoWebProxyState.Completed; } else { using (StreamReader reader = new StreamReader(stream)) { scriptBody = reader.ReadToEnd(); } } } WebResponse response4 = response; response = null; response4.Close(); timer.Cancel(); timer = null; if (downloadFailure != BaseWebProxyFinder.AutoWebProxyState.Completed) { if ((this.scriptInstance != null) && (scriptBody == this.scriptInstance.ScriptBody)) { this.scriptInstance.LastModified = minValue; if (buffer != null) { this.scriptInstance.Buffer = buffer; } scriptInstance = this.scriptInstance; downloadFailure = BaseWebProxyFinder.AutoWebProxyState.Completed; } else { scriptInstance = new AutoWebProxyScriptWrapper { LastModified = minValue }; if (scriptInstance.Compile(location, scriptBody, buffer)) { downloadFailure = BaseWebProxyFinder.AutoWebProxyState.Completed; } else { downloadFailure = BaseWebProxyFinder.AutoWebProxyState.CompilationFailure; } } } } } catch (Exception exception) { if (Logging.On) { Logging.PrintWarning(Logging.Web, SR.GetString("net_log_proxy_script_download_compile_error", new object[] { exception })); } } finally { if (timer != null) { timer.Cancel(); } try { if (response != null) { response.Close(); } } finally { CodeAccessPermission.RevertAssert(); this.request = null; } } if ((downloadFailure == BaseWebProxyFinder.AutoWebProxyState.Completed) && (this.scriptInstance != scriptInstance)) { if (this.scriptInstance != null) { this.scriptInstance.Close(); } this.scriptInstance = scriptInstance; } return downloadFailure; }