|
static private GetOrCreateQueue ( int durationMilliseconds ) : |
||
| durationMilliseconds | int | |
| return | ||
internal void Close()
{
site.Close();
// Can't call AppDomain.Unload() from a user thread.
TimerThread.GetOrCreateQueue(0).CreateTimer(new TimerThread.Callback(CloseAppDomainCallback), appDomainIndex);
GC.SuppressFinalize(this);
}
internal ConnectionPool(System.Net.ServicePoint servicePoint, int maxPoolSize, int minPoolSize, int idleTimeout, CreateConnectionDelegate createConnectionCallback)
{
this.m_CreateConnectionCallback = createConnectionCallback;
this.m_MaxPoolSize = maxPoolSize;
this.m_MinPoolSize = minPoolSize;
this.m_ServicePoint = servicePoint;
this.Initialize();
if (idleTimeout > 0)
{
this.m_CleanupQueue = TimerThread.GetOrCreateQueue((idleTimeout == 1) ? 1 : (idleTimeout / 2));
this.m_CleanupQueue.CreateTimer(s_CleanupCallback, this);
}
}
/// <summary>
/// <para>Constructor - binds pool with a servicePoint and sets up a cleanup Timer to nuke Idle Connections</para>
/// </summary>
internal ConnectionPool(ServicePoint servicePoint, int maxPoolSize, int minPoolSize, int idleTimeout, CreateConnectionDelegate createConnectionCallback) : base()
{
m_State = State.Initializing;
m_CreateConnectionCallback = createConnectionCallback;
m_MaxPoolSize = maxPoolSize;
m_MinPoolSize = minPoolSize;
m_ServicePoint = servicePoint;
Initialize();
if (idleTimeout > 0)
{
m_CleanupQueue = TimerThread.GetOrCreateQueue(idleTimeout / 2);
m_CleanupQueue.CreateTimer(s_CleanupCallback, this);
}
}
/// <summary>
/// <para>Constructor - binds pool with a servicePoint and sets up a cleanup Timer to remove Idle Connections</para>
/// </summary>
internal ConnectionPool(ServicePoint servicePoint, int maxPoolSize, int minPoolSize, int idleTimeout, CreateConnectionDelegate createConnectionCallback) : base()
{
m_State = State.Initializing;
m_CreateConnectionCallback = createConnectionCallback;
m_MaxPoolSize = maxPoolSize;
m_MinPoolSize = minPoolSize;
m_ServicePoint = servicePoint;
Initialize();
if (idleTimeout > 0)
{
// special case: if the timeout value is 1 then the timer thread should have a duration
// of 1 to avoid having the timer callback run constantly
m_CleanupQueue = TimerThread.GetOrCreateQueue(idleTimeout == 1 ? 1 : (idleTimeout / 2));
m_CleanupQueue.CreateTimer(s_CleanupCallback, this);
}
}
private void CreateAppDomain()
{
// Locking s_AppDomains must happen in a CER so we don't orphan a lock that gets taken by AppDomain.DomainUnload.
bool lockHeld = false;
RuntimeHelpers.PrepareConstrainedRegions();
try
{
Monitor.Enter(s_AppDomains.SyncRoot, ref lockHeld);
if (s_CleanedUp)
{
throw new InvalidOperationException(SR.GetString(SR.net_cant_perform_during_shutdown));
}
// Create singleton.
if (s_AppDomainInfo == null)
{
s_AppDomainInfo = new AppDomainSetup();
s_AppDomainInfo.DisallowBindingRedirects = true;
s_AppDomainInfo.DisallowCodeDownload = true;
NamedPermissionSet perms = new NamedPermissionSet("__WebProxySandbox", PermissionState.None);
perms.AddPermission(new SecurityPermission(SecurityPermissionFlag.Execution));
ApplicationTrust trust = new ApplicationTrust();
trust.DefaultGrantSet = new PolicyStatement(perms);
s_AppDomainInfo.ApplicationTrust = trust;
s_AppDomainInfo.ApplicationBase = Environment.SystemDirectory;
}
// If something's already in s_ExcessAppDomain, try to dislodge it again.
AppDomain excessAppDomain = s_ExcessAppDomain;
if (excessAppDomain != null)
{
TimerThread.GetOrCreateQueue(0).CreateTimer(new TimerThread.Callback(CloseAppDomainCallback), excessAppDomain);
throw new InvalidOperationException(SR.GetString(SR.net_cant_create_environment));
}
appDomainIndex = s_NextAppDomainIndex++;
try { }
finally
{
PermissionSet permissionSet = new PermissionSet(PermissionState.None);
permissionSet.AddPermission(new SecurityPermission(SecurityPermissionFlag.Execution));
//
s_ExcessAppDomain = AppDomain.CreateDomain(c_appDomainName, null, s_AppDomainInfo, permissionSet, null);
try
{
s_AppDomains.Add(appDomainIndex, s_ExcessAppDomain);
// This indicates to the finally and the finalizer that everything succeeded.
scriptDomain = s_ExcessAppDomain;
}
finally
{
// ReferenceEquals has a ReliabilityContract.
if (object.ReferenceEquals(scriptDomain, s_ExcessAppDomain))
{
s_ExcessAppDomain = null;
}
else
{
// Something failed. Leave the domain in s_ExcessAppDomain until we can get rid of it. No
// more AppDomains can be created until we do. In the mean time, keep attempting to get the
// TimerThread to remove it. Also, might as well remove it from the hash if it made it in.
try
{
s_AppDomains.Remove(appDomainIndex);
}
finally
{
// Can't call AppDomain.Unload from a user thread (or in a lock).
TimerThread.GetOrCreateQueue(0).CreateTimer(new TimerThread.Callback(CloseAppDomainCallback), s_ExcessAppDomain);
}
}
}
}
}
finally
{
if (lockHeld)
{
Monitor.Exit(s_AppDomains.SyncRoot);
}
}
}
// 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);
}
internal void Close()
{
this.site.Close();
TimerThread.GetOrCreateQueue(0).CreateTimer(new TimerThread.Callback(AutoWebProxyScriptWrapper.CloseAppDomainCallback), this.appDomainIndex);
GC.SuppressFinalize(this);
}
private void CreateAppDomain()
{
bool lockTaken = false;
RuntimeHelpers.PrepareConstrainedRegions();
try
{
Monitor.Enter(s_AppDomains.SyncRoot, ref lockTaken);
if (s_CleanedUp)
{
throw new InvalidOperationException(SR.GetString("net_cant_perform_during_shutdown"));
}
if (s_AppDomainInfo == null)
{
s_AppDomainInfo = new AppDomainSetup();
s_AppDomainInfo.DisallowBindingRedirects = true;
s_AppDomainInfo.DisallowCodeDownload = true;
NamedPermissionSet permSet = new NamedPermissionSet("__WebProxySandbox", PermissionState.None);
permSet.AddPermission(new SecurityPermission(SecurityPermissionFlag.Execution));
ApplicationTrust trust = new ApplicationTrust {
DefaultGrantSet = new PolicyStatement(permSet)
};
s_AppDomainInfo.ApplicationTrust = trust;
s_AppDomainInfo.ApplicationBase = Environment.SystemDirectory;
}
AppDomain context = s_ExcessAppDomain;
if (context != null)
{
TimerThread.GetOrCreateQueue(0).CreateTimer(new TimerThread.Callback(AutoWebProxyScriptWrapper.CloseAppDomainCallback), context);
throw new InvalidOperationException(SR.GetString("net_cant_create_environment"));
}
this.appDomainIndex = s_NextAppDomainIndex++;
try
{
}
finally
{
PermissionSet grantSet = new PermissionSet(PermissionState.None);
grantSet.AddPermission(new SecurityPermission(SecurityPermissionFlag.Execution));
s_ExcessAppDomain = AppDomain.CreateDomain("WebProxyScript", null, s_AppDomainInfo, grantSet, null);
try
{
s_AppDomains.Add(this.appDomainIndex, s_ExcessAppDomain);
this.scriptDomain = s_ExcessAppDomain;
}
finally
{
if (object.ReferenceEquals(this.scriptDomain, s_ExcessAppDomain))
{
s_ExcessAppDomain = null;
}
else
{
try
{
s_AppDomains.Remove(this.appDomainIndex);
}
finally
{
TimerThread.GetOrCreateQueue(0).CreateTimer(new TimerThread.Callback(AutoWebProxyScriptWrapper.CloseAppDomainCallback), s_ExcessAppDomain);
}
}
}
}
}
finally
{
if (lockTaken)
{
Monitor.Exit(s_AppDomains.SyncRoot);
}
}
}
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);
}