Executes a proxy autoconfiguration script to determine the best proxy to use to retrieve a specified URL.


CFArrayRef CFNetworkCopyProxiesForAutoConfigurationScript(CFStringRef proxyAutoConfigurationScript, CFURLRef targetURL, CFErrorRef  _Nullable *error);



A CFString containing the code of the autoconfiguration script to execute.


The URL your application intends to access.


The address of an error object reference that is overwritten on return if an error occurs.

Return Value

Returns an array of dictionaries. Each dictionary describes a single proxy. The array is ordered optimally for requesting the URL specified.


In general, you should try to download a URL using the first proxy in the array, try the second proxy if the first one fails, and so on.

Every proxy dictionary has an entry for kCFProxyTypeKey. If the type is anything except kCFProxyTypeAutoConfigurationURL, the dictionary also has entries for the proxy's host and port (under kCFProxyHostNameKey and kCFProxyPortNumberKey respectively). If the type is kCFProxyTypeAutoConfigurationURL, it has an entry for kCFProxyAutoConfigurationURLKey.

The keys for username and password are optional and are present only if the username or password could be extracted from the information passed in (either from the URL itself or from the proxy dictionary supplied). These APIs do not consult any external credential stores such as the Keychain.

See Also

Global Proxy Configuration


Returns the list of proxies that should be used to download a given URL.


Downloads a proxy autoconfiguration script and executes it.


Downloads a proxy autoconfiguration script and executes it.


Returns a CFDictionary containing the current systemwide internet proxy settings.


Callback function called when a proxy autoconfiguration computation has completed.

Property Keys

Keys for calls to property get/set functions such as CFReadStreamSetProperty and CFReadStreamCopyProperty.

Proxy Types

Constants that specify the type of proxy.

Global Proxy Settings Constants

Constants for keys in the global proxy settings dictionary returned by CFNetworkCopySystemProxySettings.