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* This file is part of the Symfony package.
* (c) Fabien Potencier <>
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
namespace Symfony\Contracts\HttpClient;
use Symfony\Contracts\HttpClient\Exception\TransportExceptionInterface;
use Symfony\Contracts\HttpClient\Test\HttpClientTestCase;
* Provides flexible methods for requesting HTTP resources synchronously or asynchronously.
* @see HttpClientTestCase for a reference test suite
* @method static withOptions(array $options) Returns a new instance of the client with new default options
* @author Nicolas Grekas <>
interface HttpClientInterface
public const OPTIONS_DEFAULTS = [
'auth_basic' => null, // array|string - an array containing the username as first value, and optionally the
// password as the second one; or string like username:password - enabling HTTP Basic
// authentication (RFC 7617)
'auth_bearer' => null, // string - a token enabling HTTP Bearer authorization (RFC 6750)
'query' => [], // string[] - associative array of query string values to merge with the request's URL
'headers' => [], // iterable|string[]|string[][] - headers names provided as keys or as part of values
'body' => '', // array|string|resource|\Traversable|\Closure - the callback SHOULD yield a string
// smaller than the amount requested as argument; the empty string signals EOF; if
// an array is passed, it is meant as a form payload of field names and values
'json' => null, // mixed - if set, implementations MUST set the "body" option to the JSON-encoded
// value and set the "content-type" header to a JSON-compatible value if it is not
// explicitly defined in the headers option - typically "application/json"
'user_data' => null, // mixed - any extra data to attach to the request (scalar, callable, object...) that
// MUST be available via $response->getInfo('user_data') - not used internally
'max_redirects' => 20, // int - the maximum number of redirects to follow; a value lower than or equal to 0
// means redirects should not be followed; "Authorization" and "Cookie" headers MUST
// NOT follow except for the initial host name
'http_version' => null, // string - defaults to the best supported version, typically 1.1 or 2.0
'base_uri' => null, // string - the URI to resolve relative URLs, following rules in RFC 3986, section 2
'buffer' => true, // bool|resource|\Closure - whether the content of the response should be buffered or not,
// or a stream resource where the response body should be written,
// or a closure telling if/where the response should be buffered based on its headers
'on_progress' => null, // callable(int $dlNow, int $dlSize, array $info) - throwing any exceptions MUST abort
// the request; it MUST be called on DNS resolution, on arrival of headers and on
// completion; it SHOULD be called on upload/download of data and at least 1/s
'resolve' => [], // string[] - a map of host to IP address that SHOULD replace DNS resolution
'proxy' => null, // string - by default, the proxy-related env vars handled by curl SHOULD be honored
'no_proxy' => null, // string - a comma separated list of hosts that do not require a proxy to be reached
'timeout' => null, // float - the idle timeout - defaults to ini_get('default_socket_timeout')
'max_duration' => 0, // float - the maximum execution time for the request+response as a whole;
// a value lower than or equal to 0 means it is unlimited
'bindto' => '0', // string - the interface or the local socket to bind to
'verify_peer' => true, // see for the following options
'verify_host' => true,
'cafile' => null,
'capath' => null,
'local_cert' => null,
'local_pk' => null,
'passphrase' => null,
'ciphers' => null,
'peer_fingerprint' => null,
'capture_peer_cert_chain' => false,
'extra' => [], // array - additional options that can be ignored if unsupported, unlike regular options
* Requests an HTTP resource.
* Responses MUST be lazy, but their status code MUST be
* checked even if none of their public methods are called.
* Implementations are not required to support all options described above; they can also
* support more custom options; but in any case, they MUST throw a TransportExceptionInterface
* when an unsupported option is passed.
* @throws TransportExceptionInterface When an unsupported option is passed
public function request(string $method, string $url, array $options = []): ResponseInterface;
* Yields responses chunk by chunk as they complete.
* @param ResponseInterface|ResponseInterface[]|iterable $responses One or more responses created by the current HTTP client
* @param float|null $timeout The idle timeout before yielding timeout chunks
public function stream($responses, float $timeout = null): ResponseStreamInterface;