CFNetworkCopyProxiesForURL(_:_:)
Returns the list of proxies that should be used to download a given URL.
Declaration
func CFNetworkCopyProxiesForURL(_ url: CFURL, _ proxySettings: CFDictionary) -> Unmanaged<CFArray>Parameters
- url:
The URL your application intends to access.
- proxySettings:
A dictionary describing the available proxy settings. The dictionary should be in the format returned by
SystemConfiguration.framework. (See Kcfstreamerrordomainsystemconfiguration for more information.)
Return Value
Returns an array of dictionaries. Each dictionary describes a single proxy. The array is ordered optimally for requesting the URL specified.
Discussion
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.
For more information, see CFNetwork Programming Guide.