/**
* Reads a part of response body encoded with chunked Transfer-Encoding
*
* @param int $bufferSize buffer size to use for reading
*
* @return string
* @throws HTTP_Request2_MessageException
*/
protected function readChunked($bufferSize)
{
// at start of the next chunk?
if (0 == $this->chunkLength) {
$line = $this->socket->readLine($bufferSize);
if ('' === $line && $this->socket->eof()) {
$this->chunkLength = -1;
// indicate missing chunk
return '';
} elseif (!preg_match('/^([0-9a-f]+)/i', $line, $matches)) {
throw new HTTP_Request2_MessageException("Cannot decode chunked response, invalid chunk length '{$line}'", HTTP_Request2_Exception::DECODE_ERROR);
} else {
$this->chunkLength = hexdec($matches[1]);
// Chunk with zero length indicates the end
if (0 == $this->chunkLength) {
$this->socket->readLine($bufferSize);
return '';
}
}
}
$data = $this->socket->read(min($this->chunkLength, $bufferSize));
$this->chunkLength -= strlen($data);
if (0 == $this->chunkLength) {
$this->socket->readLine($bufferSize);
// Trailing CRLF
}
return $data;
}
/**
* Reads the remote server's response
*
* @return HTTP_Request2_Response
* @throws HTTP_Request2_Exception
*/
protected function readResponse()
{
$bufferSize = $this->request->getConfig('buffer_size');
do {
$response = new HTTP_Request2_Response($this->socket->readLine($bufferSize), true, $this->request->getUrl());
do {
$headerLine = $this->socket->readLine($bufferSize);
$response->parseHeaderLine($headerLine);
} while ('' != $headerLine);
} while (in_array($response->getStatus(), array(100, 101)));
$this->request->setLastEvent('receivedHeaders', $response);
// No body possible in such responses
if (HTTP_Request2::METHOD_HEAD == $this->request->getMethod() || HTTP_Request2::METHOD_CONNECT == $this->request->getMethod() && 200 <= $response->getStatus() && 300 > $response->getStatus() || in_array($response->getStatus(), array(204, 304))) {
return $response;
}
$chunked = 'chunked' == $response->getHeader('transfer-encoding');
$length = $response->getHeader('content-length');
$hasBody = false;
if ($chunked || null === $length || 0 < intval($length)) {
// RFC 2616, section 4.4:
// 3. ... If a message is received with both a
// Transfer-Encoding header field and a Content-Length header field,
// the latter MUST be ignored.
$toRead = $chunked || null === $length ? null : $length;
$this->chunkLength = 0;
while (!$this->socket->eof() && (is_null($toRead) || 0 < $toRead)) {
if ($chunked) {
$data = $this->readChunked($bufferSize);
} elseif (is_null($toRead)) {
$data = $this->socket->read($bufferSize);
} else {
$data = $this->socket->read(min($toRead, $bufferSize));
$toRead -= strlen($data);
}
if ('' == $data && (!$this->chunkLength || $this->socket->eof())) {
break;
}
$hasBody = true;
if ($this->request->getConfig('store_body')) {
$response->appendBody($data);
}
if (!in_array($response->getHeader('content-encoding'), array('identity', null))) {
$this->request->setLastEvent('receivedEncodedBodyPart', $data);
} else {
$this->request->setLastEvent('receivedBodyPart', $data);
}
}
}
if ($hasBody) {
$this->request->setLastEvent('receivedBody', $response);
}
return $response;
}
/**
* Reads the remote server's response
*
* @return HTTP_Request2_Response
* @throws HTTP_Request2_Exception
*/
protected function readResponse()
{
$bufferSize = $this->request->getConfig('buffer_size');
// http://tools.ietf.org/html/rfc2616#section-8.2.3
// ...the client SHOULD NOT wait for an indefinite period before sending the request body
$timeout = $this->expect100Continue ? 1 : null;
do {
try {
$response = new HTTP_Request2_Response($this->socket->readLine($bufferSize, $timeout), true, $this->request->getUrl());
do {
$headerLine = $this->socket->readLine($bufferSize);
$response->parseHeaderLine($headerLine);
} while ('' != $headerLine);
} catch (HTTP_Request2_MessageException $e) {
if (HTTP_Request2_Exception::TIMEOUT === $e->getCode() && $this->expect100Continue) {
return null;
}
throw $e;
}
if ($this->expect100Continue && 100 == $response->getStatus()) {
return $response;
}
} while (in_array($response->getStatus(), array(100, 101)));
$this->request->setLastEvent('receivedHeaders', $response);
// No body possible in such responses
if (HTTP_Request2::METHOD_HEAD == $this->request->getMethod() || HTTP_Request2::METHOD_CONNECT == $this->request->getMethod() && 200 <= $response->getStatus() && 300 > $response->getStatus() || in_array($response->getStatus(), array(204, 304))) {
return $response;
}
$chunked = 'chunked' == $response->getHeader('transfer-encoding');
$length = $response->getHeader('content-length');
$hasBody = false;
if ($chunked || null === $length || 0 < intval($length)) {
// RFC 2616, section 4.4:
// 3. ... If a message is received with both a
// Transfer-Encoding header field and a Content-Length header field,
// the latter MUST be ignored.
$toRead = $chunked || null === $length ? null : $length;
$this->chunkLength = 0;
while (!$this->socket->eof() && (is_null($toRead) || 0 < $toRead)) {
if ($chunked) {
$data = $this->readChunked($bufferSize);
} elseif (is_null($toRead)) {
$data = $this->socket->read($bufferSize);
} else {
$data = $this->socket->read(min($toRead, $bufferSize));
$toRead -= strlen($data);
}
if ('' == $data && (!$this->chunkLength || $this->socket->eof())) {
break;
}
$hasBody = true;
if ($this->request->getConfig('store_body')) {
$response->appendBody($data);
}
if (!in_array($response->getHeader('content-encoding'), array('identity', null))) {
$this->request->setLastEvent('receivedEncodedBodyPart', $data);
} else {
$this->request->setLastEvent('receivedBodyPart', $data);
}
}
}
if ($hasBody) {
$this->request->setLastEvent('receivedBody', $response);
}
return $response;
}
