/**
* Parse the next HTTP response from the given stream.
*
* @param ReadableStream $stream
* @param string $line HTTP response line (mighty already be received while checking for 100 continue).
* @param bool $dropBody Drop response body (needed when the response is caused by a HEAD request).
* @return HttpResponse
*
* @throws StreamClosedException When no HTTP response line could be parsed.
*/
public function parseResponse(ReadableStream $stream, string $line = null, bool $dropBody = false) : \Generator
{
if ($line === null) {
$i = 0;
do {
if ($i++ > 3 || null === ($line = (yield $stream->readLine()))) {
throw new StreamClosedException('Stream closed before HTTP response line was read');
}
} while ($line === '');
}
$m = null;
if (!\preg_match("'^HTTP/(1\\.[01])\\s+([1-5][0-9]{2})(.*)\$'i", \trim($line), $m)) {
throw new StreamClosedException('Invalid HTTP response line received');
}
$response = new HttpResponse();
$response = $response->withProtocolVersion($m[1]);
$response = $response->withStatus((int) $m[2], \trim($m[3]));
$response = (yield from $this->parseHeaders($stream, $response));
if ($dropBody || Http::isResponseWithoutBody($response->getStatusCode())) {
$body = new StringBody();
if (!$dropBody) {
$response = $response->withHeader('Content-Length', '0');
}
} else {
$body = Body::fromMessage($stream, $response);
}
static $remove = ['TE', 'Trailer'];
foreach ($remove as $name) {
$response = $response->withoutHeader($name);
}
return $response->withBody($body);
}
public function parseRequest(ReadableStream $stream) : \Generator
{
$i = 0;
do {
if ($i++ > 3 || null === ($line = (yield $stream->readLine()))) {
throw new StreamClosedException('Stream closed before HTTP request line was read');
}
} while ($line === '');
$m = null;
if (!\preg_match("'^(\\S+)\\s+(.+)\\s+HTTP/(1\\.[01])\$'i", \trim($line), $m)) {
throw new StreamClosedException('Invalid HTTP request line received');
}
$request = new HttpRequest($m[2], $m[1], [], $m[3]);
$request = $request->withRequestTarget(\trim($m[2]));
$request = (yield from $this->parseHeaders($stream, $request));
$body = Body::fromMessage($stream, $request);
static $remove = ['Content-Encoding', 'Trailer'];
foreach ($remove as $name) {
$request = $request->withoutHeader($name);
}
return $request->withBody($body);
}
protected function parseHeaders(ReadableStream $stream, HttpMessage $message) : \Generator
{
$remaining = $this->maxHeaderSize;
try {
while (null !== ($line = (yield $stream->readLine($remaining)))) {
if (\trim($line) === '') {
break;
}
$remaining -= \strlen($line);
$parts = \explode(':', $line, 2);
if (!isset($parts[1])) {
throw new \RuntimeException(\sprintf('Malformed HTTP header received: "%s"', $line));
}
$message = $message->withAddedHeader(\trim($parts[0]), \trim($parts[1]));
}
} catch (StreamException $e) {
throw new StatusException(Http::REQUEST_HEADER_FIELDS_TOO_LARGE, 'Maximum HTTP header size exceeded', [], $e);
}
if ($line === null) {
throw new \RuntimeException('Premature end of HTTP headers detected');
}
return $message;
}
