491 lines
16 KiB
PHP
491 lines
16 KiB
PHP
<?php
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namespace GuzzleHttp\Handler;
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use GuzzleHttp\Exception\RequestException;
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use GuzzleHttp\Exception\ConnectException;
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use GuzzleHttp\Promise\FulfilledPromise;
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use GuzzleHttp\Promise\RejectedPromise;
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use GuzzleHttp\Promise\PromiseInterface;
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use GuzzleHttp\Psr7;
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use GuzzleHttp\TransferStats;
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use Psr\Http\Message\RequestInterface;
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use Psr\Http\Message\ResponseInterface;
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use Psr\Http\Message\StreamInterface;
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/**
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* HTTP handler that uses PHP's HTTP stream wrapper.
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*/
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class StreamHandler
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{
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private $lastHeaders = [];
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/**
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* Sends an HTTP request.
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*
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* @param RequestInterface $request Request to send.
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* @param array $options Request transfer options.
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*
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* @return PromiseInterface
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*/
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public function __invoke(RequestInterface $request, array $options)
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{
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// Sleep if there is a delay specified.
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if (isset($options['delay'])) {
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usleep($options['delay'] * 1000);
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}
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$startTime = isset($options['on_stats']) ? microtime(true) : null;
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try {
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// Does not support the expect header.
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$request = $request->withoutHeader('Expect');
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// Append a content-length header if body size is zero to match
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// cURL's behavior.
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if (0 === $request->getBody()->getSize()) {
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$request = $request->withHeader('Content-Length', 0);
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}
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return $this->createResponse(
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$request,
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$options,
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$this->createStream($request, $options),
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$startTime
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);
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} catch (\InvalidArgumentException $e) {
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throw $e;
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} catch (\Exception $e) {
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// Determine if the error was a networking error.
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$message = $e->getMessage();
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// This list can probably get more comprehensive.
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if (strpos($message, 'getaddrinfo') // DNS lookup failed
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|| strpos($message, 'Connection refused')
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|| strpos($message, "couldn't connect to host") // error on HHVM
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) {
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$e = new ConnectException($e->getMessage(), $request, $e);
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}
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$e = RequestException::wrapException($request, $e);
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$this->invokeStats($options, $request, $startTime, null, $e);
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return new RejectedPromise($e);
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}
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}
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private function invokeStats(
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array $options,
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RequestInterface $request,
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$startTime,
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ResponseInterface $response = null,
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$error = null
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) {
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if (isset($options['on_stats'])) {
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$stats = new TransferStats(
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$request,
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$response,
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microtime(true) - $startTime,
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$error,
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[]
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);
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call_user_func($options['on_stats'], $stats);
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}
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}
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private function createResponse(
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RequestInterface $request,
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array $options,
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$stream,
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$startTime
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) {
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$hdrs = $this->lastHeaders;
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$this->lastHeaders = [];
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$parts = explode(' ', array_shift($hdrs), 3);
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$ver = explode('/', $parts[0])[1];
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$status = $parts[1];
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$reason = isset($parts[2]) ? $parts[2] : null;
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$headers = \GuzzleHttp\headers_from_lines($hdrs);
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list ($stream, $headers) = $this->checkDecode($options, $headers, $stream);
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$stream = Psr7\stream_for($stream);
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$sink = $stream;
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if (strcasecmp('HEAD', $request->getMethod())) {
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$sink = $this->createSink($stream, $options);
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}
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$response = new Psr7\Response($status, $headers, $sink, $ver, $reason);
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if (isset($options['on_headers'])) {
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try {
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$options['on_headers']($response);
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} catch (\Exception $e) {
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$msg = 'An error was encountered during the on_headers event';
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$ex = new RequestException($msg, $request, $response, $e);
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return new RejectedPromise($ex);
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}
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}
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// Do not drain when the request is a HEAD request because they have
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// no body.
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if ($sink !== $stream) {
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$this->drain(
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$stream,
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$sink,
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$response->getHeaderLine('Content-Length')
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);
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}
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$this->invokeStats($options, $request, $startTime, $response, null);
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return new FulfilledPromise($response);
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}
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private function createSink(StreamInterface $stream, array $options)
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{
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if (!empty($options['stream'])) {
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return $stream;
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}
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$sink = isset($options['sink'])
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? $options['sink']
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: fopen('php://temp', 'r+');
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return is_string($sink)
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? new Psr7\LazyOpenStream($sink, 'w+')
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: Psr7\stream_for($sink);
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}
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private function checkDecode(array $options, array $headers, $stream)
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{
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// Automatically decode responses when instructed.
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if (!empty($options['decode_content'])) {
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$normalizedKeys = \GuzzleHttp\normalize_header_keys($headers);
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if (isset($normalizedKeys['content-encoding'])) {
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$encoding = $headers[$normalizedKeys['content-encoding']];
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if ($encoding[0] === 'gzip' || $encoding[0] === 'deflate') {
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$stream = new Psr7\InflateStream(
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Psr7\stream_for($stream)
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);
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$headers['x-encoded-content-encoding']
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= $headers[$normalizedKeys['content-encoding']];
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// Remove content-encoding header
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unset($headers[$normalizedKeys['content-encoding']]);
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// Fix content-length header
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if (isset($normalizedKeys['content-length'])) {
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$headers['x-encoded-content-length']
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= $headers[$normalizedKeys['content-length']];
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$length = (int) $stream->getSize();
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if ($length === 0) {
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unset($headers[$normalizedKeys['content-length']]);
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} else {
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$headers[$normalizedKeys['content-length']] = [$length];
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}
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}
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}
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}
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}
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return [$stream, $headers];
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}
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/**
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* Drains the source stream into the "sink" client option.
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*
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* @param StreamInterface $source
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* @param StreamInterface $sink
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* @param string $contentLength Header specifying the amount of
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* data to read.
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*
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* @return StreamInterface
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* @throws \RuntimeException when the sink option is invalid.
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*/
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private function drain(
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StreamInterface $source,
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StreamInterface $sink,
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$contentLength
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) {
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// If a content-length header is provided, then stop reading once
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// that number of bytes has been read. This can prevent infinitely
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// reading from a stream when dealing with servers that do not honor
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// Connection: Close headers.
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Psr7\copy_to_stream(
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$source,
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$sink,
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(strlen($contentLength) > 0 && (int) $contentLength > 0) ? (int) $contentLength : -1
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);
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$sink->seek(0);
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$source->close();
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return $sink;
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}
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/**
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* Create a resource and check to ensure it was created successfully
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*
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* @param callable $callback Callable that returns stream resource
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*
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* @return resource
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* @throws \RuntimeException on error
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*/
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private function createResource(callable $callback)
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{
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$errors = null;
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set_error_handler(function ($_, $msg, $file, $line) use (&$errors) {
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$errors[] = [
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'message' => $msg,
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'file' => $file,
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'line' => $line
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];
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return true;
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});
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$resource = $callback();
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restore_error_handler();
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if (!$resource) {
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$message = 'Error creating resource: ';
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foreach ($errors as $err) {
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foreach ($err as $key => $value) {
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$message .= "[$key] $value" . PHP_EOL;
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}
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}
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throw new \RuntimeException(trim($message));
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}
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return $resource;
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}
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private function createStream(RequestInterface $request, array $options)
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{
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static $methods;
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if (!$methods) {
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$methods = array_flip(get_class_methods(__CLASS__));
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}
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// HTTP/1.1 streams using the PHP stream wrapper require a
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// Connection: close header
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if ($request->getProtocolVersion() == '1.1'
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&& !$request->hasHeader('Connection')
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) {
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$request = $request->withHeader('Connection', 'close');
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}
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// Ensure SSL is verified by default
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if (!isset($options['verify'])) {
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$options['verify'] = true;
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}
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$params = [];
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$context = $this->getDefaultContext($request, $options);
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if (isset($options['on_headers']) && !is_callable($options['on_headers'])) {
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throw new \InvalidArgumentException('on_headers must be callable');
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}
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if (!empty($options)) {
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foreach ($options as $key => $value) {
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$method = "add_{$key}";
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if (isset($methods[$method])) {
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$this->{$method}($request, $context, $value, $params);
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}
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}
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}
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if (isset($options['stream_context'])) {
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if (!is_array($options['stream_context'])) {
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throw new \InvalidArgumentException('stream_context must be an array');
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}
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$context = array_replace_recursive(
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$context,
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$options['stream_context']
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);
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}
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$context = $this->createResource(
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function () use ($context, $params) {
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return stream_context_create($context, $params);
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}
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);
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return $this->createResource(
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function () use ($request, &$http_response_header, $context) {
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$resource = fopen((string) $request->getUri()->withFragment(''), 'r', null, $context);
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$this->lastHeaders = $http_response_header;
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return $resource;
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}
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);
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}
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private function getDefaultContext(RequestInterface $request)
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{
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$headers = '';
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foreach ($request->getHeaders() as $name => $value) {
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foreach ($value as $val) {
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$headers .= "$name: $val\r\n";
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}
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}
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$context = [
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'http' => [
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'method' => $request->getMethod(),
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'header' => $headers,
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'protocol_version' => $request->getProtocolVersion(),
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'ignore_errors' => true,
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'follow_location' => 0,
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],
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];
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$body = (string) $request->getBody();
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if (!empty($body)) {
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$context['http']['content'] = $body;
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// Prevent the HTTP handler from adding a Content-Type header.
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if (!$request->hasHeader('Content-Type')) {
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$context['http']['header'] .= "Content-Type:\r\n";
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}
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}
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$context['http']['header'] = rtrim($context['http']['header']);
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return $context;
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}
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private function add_proxy(RequestInterface $request, &$options, $value, &$params)
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{
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if (!is_array($value)) {
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$options['http']['proxy'] = $value;
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} else {
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$scheme = $request->getUri()->getScheme();
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if (isset($value[$scheme])) {
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if (!isset($value['no'])
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|| !\GuzzleHttp\is_host_in_noproxy(
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$request->getUri()->getHost(),
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$value['no']
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)
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) {
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$options['http']['proxy'] = $value[$scheme];
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}
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}
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}
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}
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private function add_timeout(RequestInterface $request, &$options, $value, &$params)
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{
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if ($value > 0) {
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$options['http']['timeout'] = $value;
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}
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}
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private function add_verify(RequestInterface $request, &$options, $value, &$params)
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{
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if ($value === true) {
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// PHP 5.6 or greater will find the system cert by default. When
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// < 5.6, use the Guzzle bundled cacert.
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if (PHP_VERSION_ID < 50600) {
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$options['ssl']['cafile'] = \GuzzleHttp\default_ca_bundle();
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}
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} elseif (is_string($value)) {
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$options['ssl']['cafile'] = $value;
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if (!file_exists($value)) {
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throw new \RuntimeException("SSL CA bundle not found: $value");
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}
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} elseif ($value === false) {
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$options['ssl']['verify_peer'] = false;
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$options['ssl']['verify_peer_name'] = false;
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return;
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} else {
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throw new \InvalidArgumentException('Invalid verify request option');
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}
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$options['ssl']['verify_peer'] = true;
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$options['ssl']['verify_peer_name'] = true;
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$options['ssl']['allow_self_signed'] = false;
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}
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private function add_cert(RequestInterface $request, &$options, $value, &$params)
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{
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if (is_array($value)) {
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$options['ssl']['passphrase'] = $value[1];
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$value = $value[0];
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}
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if (!file_exists($value)) {
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throw new \RuntimeException("SSL certificate not found: {$value}");
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}
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$options['ssl']['local_cert'] = $value;
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}
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private function add_progress(RequestInterface $request, &$options, $value, &$params)
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{
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$this->addNotification(
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$params,
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function ($code, $a, $b, $c, $transferred, $total) use ($value) {
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if ($code == STREAM_NOTIFY_PROGRESS) {
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$value($total, $transferred, null, null);
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}
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}
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);
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}
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private function add_debug(RequestInterface $request, &$options, $value, &$params)
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{
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if ($value === false) {
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return;
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}
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static $map = [
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STREAM_NOTIFY_CONNECT => 'CONNECT',
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STREAM_NOTIFY_AUTH_REQUIRED => 'AUTH_REQUIRED',
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STREAM_NOTIFY_AUTH_RESULT => 'AUTH_RESULT',
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STREAM_NOTIFY_MIME_TYPE_IS => 'MIME_TYPE_IS',
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STREAM_NOTIFY_FILE_SIZE_IS => 'FILE_SIZE_IS',
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STREAM_NOTIFY_REDIRECTED => 'REDIRECTED',
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STREAM_NOTIFY_PROGRESS => 'PROGRESS',
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STREAM_NOTIFY_FAILURE => 'FAILURE',
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STREAM_NOTIFY_COMPLETED => 'COMPLETED',
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STREAM_NOTIFY_RESOLVE => 'RESOLVE',
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];
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static $args = ['severity', 'message', 'message_code',
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'bytes_transferred', 'bytes_max'];
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$value = \GuzzleHttp\debug_resource($value);
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$ident = $request->getMethod() . ' ' . $request->getUri()->withFragment('');
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$this->addNotification(
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$params,
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function () use ($ident, $value, $map, $args) {
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$passed = func_get_args();
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$code = array_shift($passed);
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fprintf($value, '<%s> [%s] ', $ident, $map[$code]);
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foreach (array_filter($passed) as $i => $v) {
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fwrite($value, $args[$i] . ': "' . $v . '" ');
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}
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fwrite($value, "\n");
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}
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);
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}
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private function addNotification(array &$params, callable $notify)
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{
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// Wrap the existing function if needed.
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if (!isset($params['notification'])) {
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$params['notification'] = $notify;
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} else {
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$params['notification'] = $this->callArray([
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$params['notification'],
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$notify
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]);
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}
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}
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private function callArray(array $functions)
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{
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return function () use ($functions) {
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$args = func_get_args();
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foreach ($functions as $fn) {
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call_user_func_array($fn, $args);
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}
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};
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}
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}
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