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;
}
// 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));
}
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;
}
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;
}
