vendor/guzzlehttp/guzzle/src/MessageFormatter.php

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<?php

namespace GuzzleHttp;

use Psr\Http\Message\MessageInterface;
use Psr\Http\Message\RequestInterface;
use Psr\Http\Message\ResponseInterface;

/**
 * Formats log messages using variable substitutions for requests, responses,
 * and other transactional data.
 *
 * The following variable substitutions are supported:
 *
 * - {request}:        Full HTTP request message
 * - {response}:       Full HTTP response message
 * - {ts}:             ISO 8601 date in GMT
 * - {date_iso_8601}   ISO 8601 date in GMT
 * - {date_common_log} Apache common log date using the configured timezone.
 * - {host}:           Host of the request
 * - {method}:         Method of the request
 * - {uri}:            URI of the request
 * - {version}:        Protocol version
 * - {target}:         Request target of the request (path + query + fragment)
 * - {hostname}:       Hostname of the machine that sent the request
 * - {code}:           Status code of the response (if available)
 * - {phrase}:         Reason phrase of the response  (if available)
 * - {error}:          Any error messages (if available)
 * - {req_header_*}:   Replace `*` with the lowercased name of a request header to add to the message
 * - {res_header_*}:   Replace `*` with the lowercased name of a response header to add to the message
 * - {req_headers}:    Request headers
 * - {res_headers}:    Response headers
 * - {req_body}:       Request body
 * - {res_body}:       Response body
 *
 * @final
 */
class MessageFormatter implements MessageFormatterInterface
{
    /**
     * Apache Common Log Format.
     *
     * @link https://httpd.apache.org/docs/2.4/logs.html#common
     *
     * @var string
     */
    public const CLF = "{hostname} {req_header_User-Agent} - [{date_common_log}] \"{method} {target} HTTP/{version}\" {code} {res_header_Content-Length}";
    public const DEBUG = ">>>>>>>>\n{request}\n<<<<<<<<\n{response}\n--------\n{error}";
    public const SHORT = '[{ts}] "{method} {target} HTTP/{version}" {code}';

    /**
     * @var string Template used to format log messages
     */
    private $template;

    /**
     * @param string $template Log message template
     */
    public function __construct(?string $template = self::CLF)
    {