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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)
{
$this->template = $template ?: self::CLF;
}
/**
* Returns a formatted message string.
*
* @param RequestInterface $request Request that was sent
* @param ResponseInterface|null $response Response that was received
* @param \Throwable|null $error Exception that was received
*/
public function format(RequestInterface $request, ?ResponseInterface $response = null, ?\Throwable $error = null): string
{
$cache = [];
/** @var string */
return \preg_replace_callback(
'/{\s*([A-Za-z_\-\.0-9]+)\s*}/',
function (array $matches) use ($request, $response, $error, &$cache) {
if (isset($cache[$matches[1]])) {
return $cache[$matches[1]];
}
$result = '';
switch ($matches[1]) {
case 'request':
$result = Psr7\Message::toString($request);
break;
case 'response':
$result = $response ? Psr7\Message::toString($response) : '';
break;
case 'req_headers':
$result = \trim($request->getMethod()
. ' ' . $request->getRequestTarget())
. ' HTTP/' . $request->getProtocolVersion() . "\r\n"
. $this->headers($request);
break;
case 'res_headers':
$result = $response ?
\sprintf(
'HTTP/%s %d %s',
$response->getProtocolVersion(),
$response->getStatusCode(),
$response->getReasonPhrase()
) . "\r\n" . $this->headers($response)
: 'NULL';
break;
case 'req_body':
$result = $request->getBody()->__toString();
break;
case 'res_body':
if (!$response instanceof ResponseInterface) {
$result = 'NULL';
break;
}
$body = $response->getBody();
if (!$body->isSeekable()) {
$result = 'RESPONSE_NOT_LOGGEABLE';
break;
}
$result = $response->getBody()->__toString();
break;
case 'ts':
case 'date_iso_8601':
$result = \gmdate('c');
break;
case 'date_common_log':
$result = \date('d/M/Y:H:i:s O');
break;
case 'method':
$result = $request->getMethod();
break;
case 'version':
$result = $request->getProtocolVersion();
break;
case 'uri':
case 'url':
$result = $request->getUri()->__toString();
break;
case 'target':
$result = $request->getRequestTarget();
break;
case 'req_version':
$result = $request->getProtocolVersion();
break;
case 'res_version':
$result = $response
? $response->getProtocolVersion()
: 'NULL';
break;
case 'host':
$result = $request->getHeaderLine('Host');
break;
case 'hostname':
$result = \gethostname();
break;
case 'code':
$result = $response ? $response->getStatusCode() : 'NULL';
break;
case 'phrase':
$result = $response ? $response->getReasonPhrase() : 'NULL';
break;
case 'error':
$result = $error ? $error->getMessage() : 'NULL';
break;
default:
// handle prefixed dynamic headers
if (\strpos($matches[1], 'req_header_') === 0) {
$result = $request->getHeaderLine(\substr($matches[1], 11));
} elseif (\strpos($matches[1], 'res_header_') === 0) {
$result = $response
? $response->getHeaderLine(\substr($matches[1], 11))
: 'NULL';
}
}
$cache[$matches[1]] = $result;
return $result;
},
$this->template
);
}
/**
* Get headers from message as string
*/
private function headers(MessageInterface $message): string
{
$result = '';
foreach ($message->getHeaders() as $name => $values) {
$result .= $name . ': ' . \implode(', ', $values) . "\r\n";
}
return \trim($result);
}
}
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