| private FindProxyForURL ( string url, string host ) : string | ||
| url | string | |
| host | string | |
| return | string | |
public override bool GetProxies(Uri destination, out IList <string> proxyList)
{
try
{
proxyList = null;
EnsureEngineAvailable();
// after EnsureEngineAvailable we expect State to be CompilationSuccess, otherwise return.
if (State != AutoWebProxyState.Completed)
{
// the script can't run, say we're not ready and bypass
return(false);
}
bool result = false;
try
{
string proxyListString = scriptInstance.FindProxyForURL(destination.ToString(), destination.Host);
GlobalLog.Print("NetWebProxyFinder#" + ValidationHelper.HashString(this) + "::GetProxies() calling ExecuteFindProxyForURL() for destination:" + ValidationHelper.ToString(destination) + " returned scriptReturn:" + ValidationHelper.ToString(proxyList));
proxyList = ParseScriptResult(proxyListString);
result = true;
}
catch (Exception exception)
{
if (Logging.On)
{
Logging.PrintWarning(Logging.Web, SR.GetString(SR.net_log_proxy_script_execution_error, exception));
}
}
return(result);
}
finally
{
// Reset state of 'aborted', since next call to GetProxies() must not use previous aborted state.
aborted = false;
}
}
internal StringCollection GetProxies(Uri destination, bool returnFirstOnly, out AutoWebProxyState autoWebProxyState, ref int syncStatus)
{
GlobalLog.Print("AutoWebProxyScriptEngine#" + ValidationHelper.HashString(this) + "::GetProxies() state:" + ValidationHelper.ToString(state));
if (state == AutoWebProxyState.DiscoveryFailure)
{
// No engine will be available anyway, shortcut the call.
autoWebProxyState = state;
return(null);
}
// This whole thing has to be locked, both to prevent simultaneous downloading / compilation, and
// because the script isn't threadsafe.
string scriptReturn = null;
try
{
EnterLock(ref syncStatus);
if (syncStatus != SyncStatus.LockOwner)
{
// This is typically because a download got aborted.
autoWebProxyState = AutoWebProxyState.DownloadFailure;
return(null);
}
autoWebProxyState = EnsureEngineAvailable(ref syncStatus);
if (autoWebProxyState != AutoWebProxyState.CompilationSuccess)
{
// the script can't run, say we're not ready and bypass
return(null);
}
autoWebProxyState = AutoWebProxyState.ExecutionFailure;
try {
scriptReturn = scriptInstance.FindProxyForURL(destination.ToString(), destination.Host);
autoWebProxyState = AutoWebProxyState.ExecutionSuccess;
GlobalLog.Print("AutoWebProxyScriptEngine#" + ValidationHelper.HashString(this) + "::GetProxies() calling ExecuteFindProxyForURL() for destination:" + ValidationHelper.ToString(destination) + " returned scriptReturn:" + ValidationHelper.ToString(scriptReturn));
}
catch (Exception exception) {
if (NclUtilities.IsFatal(exception))
{
throw;
}
if (Logging.On)
{
Logging.PrintWarning(Logging.Web, SR.GetString(SR.net_log_proxy_script_execution_error, exception));
}
GlobalLog.Print("AutoWebProxyScriptEngine#" + ValidationHelper.HashString(this) + "::GetProxies() calling ExecuteFindProxyForURL() for destination:" + ValidationHelper.ToString(destination) + " threw:" + ValidationHelper.ToString(exception));
}
}
finally
{
ExitLock(ref syncStatus);
}
if (autoWebProxyState == AutoWebProxyState.ExecutionFailure)
{
// the script failed at runtime, say we're not ready and bypass
return(null);
}
StringCollection proxies = ParseScriptReturn(scriptReturn, destination, returnFirstOnly);
GlobalLog.Print("AutoWebProxyScriptEngine#" + ValidationHelper.HashString(this) + "::GetProxies() proxies:" + ValidationHelper.ToString(proxies));
return(proxies);
}