public Uri?GetProxy(Uri targetUri)
{
using (SafeCFDictionaryHandle systemProxySettings = CFNetworkCopySystemProxySettings())
using (SafeCreateHandle cfurl = CFURLCreateWithString(targetUri.AbsoluteUri))
using (SafeCFArrayHandle proxies = CFNetworkCopyProxiesForURL(cfurl, systemProxySettings))
{
long proxyCount = CFArrayGetCount(proxies);
for (int i = 0; i < proxyCount; i++)
{
IntPtr proxyValue = CFArrayGetValueAtIndex(proxies, i);
using (SafeCFDictionaryHandle proxyDict = new SafeCFDictionaryHandle(proxyValue, false))
{
CFProxy proxy = new CFProxy(proxyDict);
if (proxy.ProxyType == CFProxy.kCFProxyTypeAutoConfigurationURL || proxy.ProxyType == CFProxy.kCFProxyTypeAutoConfigurationJavaScript)
{
Uri?result = ExecuteProxyAutoConfiguration(cfurl, proxy);
if (result != null)
{
return(result);
}
}
else if (proxy.ProxyType == CFProxy.kCFProxyTypeHTTP || proxy.ProxyType == CFProxy.kCFProxyTypeHTTPS)
{
return(GetProxyUri("http", proxy));
}
}
}
}
return(null);
}
public Uri?ExecuteProxyAutoConfiguration(SafeCreateHandle cfurl, CFProxy proxy)
{
Uri? result = null;
CFRunLoopRef runLoop = CFRunLoopGetCurrent();
// Callback that will be called after executing the configuration script
CFProxyAutoConfigurationResultCallback cb = (IntPtr client, IntPtr proxyListHandle, IntPtr error) =>
{
if (proxyListHandle != IntPtr.Zero)
{
using (var proxyList = new SafeCFArrayHandle(proxyListHandle, false))
{
long proxyCount = CFArrayGetCount(proxyList);
for (int i = 0; i < proxyCount; i++)
{
IntPtr proxyValue = CFArrayGetValueAtIndex(proxyList, i);
using (SafeCFDictionaryHandle proxyDict = new SafeCFDictionaryHandle(proxyValue, false))
{
CFProxy proxy = new CFProxy(proxyDict);
if (proxy.ProxyType == CFProxy.kCFProxyTypeHTTP || proxy.ProxyType == CFProxy.kCFProxyTypeHTTPS)
{
result = GetProxyUri("http", proxy);
break;
}
}
}
}
}
CFRunLoopStop(runLoop);
};
CFStreamClientContext clientContext = default;
CFRunLoopSourceRef loopSource =
proxy.ProxyType == CFProxy.kCFProxyTypeAutoConfigurationURL ?
CFNetworkExecuteProxyAutoConfigurationURL(proxy.AutoConfigurationURL, cfurl, cb, ref clientContext) :
CFNetworkExecuteProxyAutoConfigurationScript(proxy.AutoConfigurationJavaScript, cfurl, cb, ref clientContext);
using (var mode = CFStringCreateWithCString(typeof(MacProxy).FullName !))
{
IntPtr modeHandle = mode.DangerousGetHandle();
CFRunLoopAddSource(runLoop, loopSource, modeHandle);
CFRunLoopRunInMode(modeHandle, double.MaxValue, 0);
CFRunLoopSourceInvalidate(loopSource);
}
GC.KeepAlive(cb);
return(result);
}
internal static partial SafeCFArrayHandle CFNetworkCopyProxiesForURL(SafeCreateHandle url, SafeCFDictionaryHandle proxySettings);
#pragma warning restore CA1810
public CFProxy(SafeCFDictionaryHandle dictionary)
{
_dictionary = dictionary;
}
internal static extern IntPtr CFDictionaryGetValue(SafeCFDictionaryHandle handle, IntPtr key);
