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phabricator/src/aphront/response/AphrontHTTPProxyResponse.php
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AphrontHTTPProxyResponse.php
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<?php
/**
* Responds to a request by proxying an HTTP future.
*
* NOTE: This is currently very inefficient for large responses, and buffers
* the entire response into memory before returning it. It should be updated
* to stream the response instead, but we need to complete additional
* infrastructure work first.
*/
final class AphrontHTTPProxyResponse extends AphrontResponse {
private $future;
private $headers;
private $httpCode;
public function setHTTPFuture(HTTPSFuture $future) {
$this->future = $future;
return $this;
}
public function getHTTPFuture() {
return $this->future;
}
public function getCacheHeaders() {
return array();
}
public function getHeaders() {
$this->readRequestHeaders();
return array_merge(
parent::getHeaders(),
$this->headers,
array(
array('X-Phabricator-Proxy', 'true'),
));
}
public function buildResponseString() {
// TODO: AphrontResponse needs to support streaming responses.
return $this->readRequest();
}
public function getHTTPResponseCode() {
$this->readRequestHeaders();
return $this->httpCode;
}
private function readRequestHeaders() {
// TODO: This should read only the headers.
$this->readRequest();
}
private function readRequest() {
// TODO: This is grossly inefficient for large requests.
list($status, $body, $headers) = $this->future->resolve();
$this->httpCode = $status->getStatusCode();
// Strip "Transfer-Encoding" headers. Particularly, the server we proxied
// may have chunked the response, but cURL will already have un-chunked it.
// If we emit the header and unchunked data, the response becomes invalid.
// See T13517. Strip "Content-Encoding" and "Content-Length" headers, since
// they may reflect compressed content.
foreach ($headers as $key => $header) {
list($header_head, $header_body) = $header;
$header_head = phutil_utf8_strtolower($header_head);
switch ($header_head) {
case 'transfer-encoding':
case 'content-encoding':
case 'content-length':
unset($headers[$key]);
break;
}
}
$this->headers = $headers;
return $body;
}
}

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