Namespace GuzzleHttp\Handler

Classes summary
CurlFactory	Creates curl resources from a request
CurlHandler	HTTP handler that uses cURL easy handles as a transport layer.
CurlMultiHandler	Returns an asynchronous response using curl_multi_* functions.
MockHandler	Handler that returns responses or throw exceptions from a queue.
Proxy	Provides basic proxies for handlers.
StreamHandler	HTTP handler that uses PHP's HTTP stream wrapper.

Interfaces summary
CurlFactoryInterface