public static bool TryCreate(out IWebProxy proxy)
{
// This will get basic proxy setting from system using existing
// WinInetProxyHelper functions. If no proxy is enabled, it will return null.
SafeWinHttpHandle sessionHandle = null;
proxy = null;
WinInetProxyHelper proxyHelper = new WinInetProxyHelper();
if (!proxyHelper.ManualSettingsOnly && !proxyHelper.AutoSettingsUsed)
{
return(false);
}
if (proxyHelper.AutoSettingsUsed)
{
sessionHandle = Interop.WinHttp.WinHttpOpen(
IntPtr.Zero,
Interop.WinHttp.WINHTTP_ACCESS_TYPE_NO_PROXY,
Interop.WinHttp.WINHTTP_NO_PROXY_NAME,
Interop.WinHttp.WINHTTP_NO_PROXY_BYPASS,
(int)Interop.WinHttp.WINHTTP_FLAG_ASYNC);
if (sessionHandle.IsInvalid)
{
// Proxy failures are currently ignored by managed handler.
return(false);
}
}
proxy = new HttpWindowsProxy(proxyHelper, sessionHandle);
return(true);
}
public static IWebProxy ConstructSystemProxy()
{
if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
{
return(HttpEnvironmentProxy.TryCreateWindows(out IWebProxy proxy) ? proxy : new HttpNoProxy());
}
else if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
if (!HttpEnvironmentProxy.TryCreateWindows(out IWebProxy proxy))
{
if (HttpWindowsProxy.TryCreate(out proxy))
{
return(proxy);
}
}
}
return(new HttpNoProxy());
}