<?php
namespace GuzzleHttp\Handler;
use GuzzleHttp\Exception\ConnectException;
use GuzzleHttp\Exception\RequestException;
use GuzzleHttp\Promise as P;
use GuzzleHttp\Promise\FulfilledPromise;
use GuzzleHttp\Promise\PromiseInterface;
use GuzzleHttp\Psr7;
use GuzzleHttp\TransferStats;
use GuzzleHttp\Utils;
use Psr\Http\Message\RequestInterface;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\StreamInterface;
use Psr\Http\Message\UriInterface;
/**
* HTTP handler that uses PHP's HTTP stream wrapper.
*
* @final
*/
class StreamHandler
{
/**
* @var array
*/
private $lastHeaders = [];
/**
* Sends an HTTP request.
*
* @param RequestInterface $request Request to send.
* @param array $options Request transfer options.
*/
public function __invoke(RequestInterface $request, array $options): PromiseInterface
{
// Sleep if there is a delay specified.
if (isset($options['delay'])) {
\usleep($options['delay'] * 1000);
}
$startTime = isset($options['on_stats']) ? Utils::currentTime() : null;
try {
// Does not support the expect header.
$request = $request->withoutHeader('Expect');
// Append a content-length header if body size is zero to match
// cURL's behavior.
if (0 === $request->getBody()->getSize()) {
$request = $request->withHeader('Content-Length', '0');
}
return $this->createResponse(
$request,
$options,
$this->createStream($request, $options),
$startTime
);
} catch (\InvalidArgumentException $e) {
throw $e;
} catch (\Exception $e) {
// Determine if the error was a networking error.
$message = $e->getMessage();
// This list can probably get more comprehensive.
if (false !== \strpos($message, 'getaddrinfo') // DNS lookup failed
|| false !== \strpos($message, 'Connection refused')
|| false !== \strpos($message, "couldn't connect to host") // error on HHVM
|| false !== \strpos($message, "connection attempt failed")
) {
$e = new ConnectException($e->getMessage(), $request, $e);
} else {
$e = RequestException::wrapException($request, $e);
}
$this->invokeStats($options, $request, $startTime, null, $e);
return P\Create::rejectionFor($e);
}
}
private function invokeStats(
array $options,
RequestInterface $request,
?float $startTime,
ResponseInterface $response = null,
\Throwable $error = null
): void {
if (isset($options['on_stats'])) {
$stats = new TransferStats($request, $response, Utils::currentTime() - $startTime, $error, []);
($options['on_stats'])($stats);
}
}
/**
* @param resource $stream
*/
private function createResponse(RequestInterface $request, array $options, $stream, ?float $startTime): PromiseInterface
{
$hdrs = $this->lastHeaders;
$this->lastHeaders = [];
try {
[$ver, $status, $reason, $headers] = HeaderProcessor::parseHeaders($hdrs);
} catch (\Exception $e) {
return P\Create::rejectionFor(
new RequestException('An error was encountered while creating the response', $request, null, $e)
);
}
[$stream, $headers] = $this->checkDecode($options, $headers, $stream);
$stream = Psr7\Utils::streamFor($stream);
$sink = $stream;
if (\strcasecmp('HEAD', $request->getMethod())) {
$sink = $this->createSink($stream, $options);
}
try {
$response = new Psr7\Response($status, $headers, $sink, $ver, $reason);
} catch (\Exception $e) {
return P\Create::rejectionFor(
new RequestException('An error was encountered while creating the response', $request, null, $e)
);
}
if (isset($options['on_headers'])) {
try {
$options['on_headers']($response);
} catch (\Exception $e) {
return P\Create::rejectionFor(
new RequestException('An error was encountered during the on_headers event', $request, $response, $e)
);
}
}
// Do not drain when the request is a HEAD request because they have
// no body.
if ($sink !== $stream) {
$this->drain($stream, $sink, $response->getHeaderLine('Content-Length'));
}
$this->invokeStats($options, $request, $startTime, $response, null);
return new FulfilledPromise($response);
}
private function createSink(StreamInterface $stream, array $options): StreamInterface
{
if (!empty($options['stream'])) {
return $stream;
}
$sink = $options['sink'] ?? Psr7\Utils::tryFopen('php://temp', 'r+');
return \is_string($sink) ? new Psr7\LazyOpenStream($sink, 'w+') : Psr7\Utils::streamFor($sink);
}
/**
* @param resource $stream
*/
private function checkDecode(array $options, array $headers, $stream): array
{
// Automatically decode responses when instructed.
if (!empty($options['decode_content'])) {
$normalizedKeys = Utils::normalizeHeaderKeys($headers);
if (isset($normalizedKeys['content-encoding'])) {
$encoding = $headers[$normalizedKeys['content-encoding']];
if ($encoding[0] === 'gzip' || $encoding[0] === 'deflate') {
$stream = new Psr7\InflateStream(Psr7\Utils::streamFor($stream));
$headers['x-encoded-content-encoding'] = $headers[$normalizedKeys['content-encoding']];
// Remove content-encoding header
unset($headers[$normalizedKeys['content-encoding']]);
// Fix content-length header
if (isset($normalizedKeys['content-length'])) {
$headers['x-encoded-content-length'] = $headers[$normalizedKeys['content-length']];
$length = (int) $stream->getSize();
if ($length === 0) {
unset($headers[$normalizedKeys['content-length']]);
} else {
$headers[$normalizedKeys['content-length']] = [$length];
}
}
}
}
}
return [$stream, $headers];
}
/**
* Drains the source stream into the "sink" client option.
*
* @param string $contentLength Header specifying the amount of
* data to read.
*
* @throws \RuntimeException when the sink option is invalid.
*/
private function drain(StreamInterface $source, StreamInterface $sink, string $contentLength): StreamInterface
{
// If a content-length header is provided, then stop reading once
// that number of bytes has been read. This can prevent infinitely
// reading from a stream when dealing with servers that do not honor
// Connection: Close headers.
Psr7\Utils::copyToStream(
$source,
$sink,
(\strlen($contentLength) > 0 && (int) $contentLength > 0) ? (int) $contentLength : -1
);
$sink->seek(0);
$source->close();
return $sink;
}
/**
* Create a resource and check to ensure it was created successfully
*
* @param callable $callback Callable that returns stream resource
*
* @return resource
*
* @throws \RuntimeException on error
*/
private function createResource(callable $callback)
{
$errors = [];
\set_error_handler(static function ($_, $msg, $file, $line) use (&$errors): bool {
$errors[] = [
'message' => $msg,
'file' => $file,
'line' => $line
];
return true;
});
$resource = $callback();
\restore_error_handler();
if (!$resource) {
$message = 'Error creating resource: ';
foreach ($errors as $err) {
foreach ($err as $key => $value) {
$message .= "[$key] $value" . \PHP_EOL;
}
}
throw new \RuntimeException(\trim($message));
}
return $resource;
}
/**
* @return resource
*/
private function createStream(RequestInterface $request, array $options)
{
static $methods;
if (!$methods) {
$methods = \array_flip(\get_class_methods(__CLASS__));
}
// HTTP/1.1 streams using the PHP stream wrapper require a
// Connection: close header
if ($request->getProtocolVersion() == '1.1'
&& !$request->hasHeader('Connection')
) {
$request = $request->withHeader('Connection', 'close');
}
// Ensure SSL is verified by default
if (!isset($options['verify'])) {
$options['verify'] = true;
}
$params = [];
$context = $this->getDefaultContext($request);
if (isset($options['on_headers']) && !\is_callable($options['on_headers'])) {
throw new \InvalidArgumentException('on_headers must be callable');
}
if (!empty($options)) {
foreach ($options as $key => $value) {
$method = "add_{$key}";
if (isset($methods[$method])) {
$this->{$method}($request, $context, $value, $params);
}
}
}
if (isset($options['stream_context'])) {
if (!\is_array($options['stream_context'])) {
throw new \InvalidArgumentException('stream_context must be an array');
}
$context = \array_replace_recursive($context, $options['stream_context']);
}
// Microsoft NTLM authentication only supported with curl handler
if (isset($options['auth'][2]) && 'ntlm' === $options['auth'][2]) {
throw new \InvalidArgumentException('Microsoft NTLM authentication only supported with curl handler');
}
$uri = $this->resolveHost($request, $options);
$contextResource = $this->createResource(
static function () use ($context, $params) {
return \stream_context_create($context, $params);
}
);
return $this->createResource(
function () use ($uri, &$http_response_header, $contextResource, $context, $options, $request) {
$resource = @\fopen((string) $uri, 'r', false, $contextResource);
$this->lastHeaders = $http_response_header;
if (false === $resource) {
throw new ConnectException(sprintf('Connection refused for URI %s', $uri), $request, null, $context);
}
if (isset($options['read_timeout'])) {
$readTimeout = $options['read_timeout'];
$sec = (int) $readTimeout;
$usec = ($readTimeout - $sec) * 100000;
\stream_set_timeout($resource, $sec, $usec);
}
return $resource;
}
);
}
private function resolveHost(RequestInterface $request, array $options): UriInterface
{
$uri = $request->getUri();
if (isset($options['force_ip_resolve']) && !\filter_var($uri->getHost(), \FILTER_VALIDATE_IP)) {
if ('v4' === $options['force_ip_resolve']) {
$records = \dns_get_record($uri->getHost(), \DNS_A);
if (false === $records || !isset($records[0]['ip'])) {
throw new ConnectException(\sprintf("Could not resolve IPv4 address for host '%s'", $uri->getHost()), $request);
}
return $uri->withHost($records[0]['ip']);
}
if ('v6' === $options['force_ip_resolve']) {
$records = \dns_get_record($uri->getHost(), \DNS_AAAA);
if (false === $records || !isset($records[0]['ipv6'])) {
throw new ConnectException(\sprintf("Could not resolve IPv6 address for host '%s'", $uri->getHost()), $request);
}
return $uri->withHost('[' . $records[0]['ipv6'] . ']');
}
}
return $uri;
}
private function getDefaultContext(RequestInterface $request): array
{
$headers = '';
foreach ($request->getHeaders() as $name => $value) {
foreach ($value as $val) {
$headers .= "$name: $val\r\n";
}
}
$context = [
'http' => [
'method' => $request->getMethod(),
'header' => $headers,
'protocol_version' => $request->getProtocolVersion(),
'ignore_errors' => true,
'follow_location' => 0,
],
];
$body = (string) $request->getBody();
if (!empty($body)) {
$context['http']['content'] = $body;
// Prevent the HTTP handler from adding a Content-Type header.
if (!$request->hasHeader('Content-Type')) {
$context['http']['header'] .= "Content-Type:\r\n";
}
}
$context['http']['header'] = \rtrim($context['http']['header']);
return $context;
}
/**
* @param mixed $value as passed via Request transfer options.
*/
private function add_proxy(RequestInterface $request, array &$options, $value, array &$params): void
{
$uri = null;
if (!\is_array($value)) {
$uri = $value;
} else {
$scheme = $request->getUri()->getScheme();
if (isset($value[$scheme])) {
if (!isset($value['no']) || !Utils::isHostInNoProxy($request->getUri()->getHost(), $value['no'])) {
$uri = $value[$scheme];
}
}
}
if (!$uri) {
return;
}
$parsed = $this->parse_proxy($uri);
$options['http']['proxy'] = $parsed['proxy'];
if ($parsed['auth']) {
if (!isset($options['http']['header'])) {
$options['http']['header'] = [];
}
$options['http']['header'] .= "\r\nProxy-Authorization: {$parsed['auth']}";
}
}
/**
* Parses the given proxy URL to make it compatible with the format PHP's stream context expects.
*/
private function parse_proxy(string $url): array
{
$parsed = \parse_url($url);
if ($parsed !== false && isset($parsed['scheme']) && $parsed['scheme'] === 'http') {
if (isset($parsed['host']) && isset($parsed['port'])) {
$auth = null;
if (isset($parsed['user']) && isset($parsed['pass'])) {
$auth = \base64_encode("{$parsed['user']}:{$parsed['pass']}");
}
return [
'proxy' => "tcp://{$parsed['host']}:{$parsed['port']}",
'auth' => $auth ? "Basic {$auth}" : null,
];
}
}
// Return proxy as-is.
return [
'proxy' => $url,
'auth' => null,
];
}
/**
* @param mixed $value as passed via Request transfer options.
*/
private function add_timeout(RequestInterface $request, array &$options, $value, array &$params): void
{
if ($value > 0) {
$options['http']['timeout'] = $value;
}
}
/**
* @param mixed $value as passed via Request transfer options.
*/
private function add_verify(RequestInterface $request, array &$options, $value, array &$params): void
{
if ($value === false) {
$options['ssl']['verify_peer'] = false;
$options['ssl']['verify_peer_name'] = false;
return;
}
if (\is_string($value)) {
$options['ssl']['cafile'] = $value;
if (!\file_exists($value)) {
throw new \RuntimeException("SSL CA bundle not found: $value");
}
} elseif ($value !== true) {
throw new \InvalidArgumentException('Invalid verify request option');
}
$options['ssl']['verify_peer'] = true;
$options['ssl']['verify_peer_name'] = true;
$options['ssl']['allow_self_signed'] = false;
}
/**
* @param mixed $value as passed via Request transfer options.
*/
private function add_cert(RequestInterface $request, array &$options, $value, array &$params): void
{
if (\is_array($value)) {
$options['ssl']['passphrase'] = $value[1];
$value = $value[0];
}
if (!\file_exists($value)) {
throw new \RuntimeException("SSL certificate not found: {$value}");
}
$options['ssl']['local_cert'] = $value;
}
/**
* @param mixed $value as passed via Request transfer options.
*/
private function add_progress(RequestInterface $request, array &$options, $value, array &$params): void
{
self::addNotification(
$params,
static function ($code, $a, $b, $c, $transferred, $total) use ($value) {
if ($code == \STREAM_NOTIFY_PROGRESS) {
$value($total, $transferred, null, null);
}
}
);
}
/**
* @param mixed $value as passed via Request transfer options.
*/
private function add_debug(RequestInterface $request, array &$options, $value, array &$params): void
{
if ($value === false) {
return;
}
static $map = [
\STREAM_NOTIFY_CONNECT => 'CONNECT',
\STREAM_NOTIFY_AUTH_REQUIRED => 'AUTH_REQUIRED',
\STREAM_NOTIFY_AUTH_RESULT => 'AUTH_RESULT',
\STREAM_NOTIFY_MIME_TYPE_IS => 'MIME_TYPE_IS',
\STREAM_NOTIFY_FILE_SIZE_IS => 'FILE_SIZE_IS',
\STREAM_NOTIFY_REDIRECTED => 'REDIRECTED',
\STREAM_NOTIFY_PROGRESS => 'PROGRESS',
\STREAM_NOTIFY_FAILURE => 'FAILURE',
\STREAM_NOTIFY_COMPLETED => 'COMPLETED',
\STREAM_NOTIFY_RESOLVE => 'RESOLVE',
];
static $args = ['severity', 'message', 'message_code', 'bytes_transferred', 'bytes_max'];
$value = Utils::debugResource($value);
$ident = $request->getMethod() . ' ' . $request->getUri()->withFragment('');
self::addNotification(
$params,
static function (int $code, ...$passed) use ($ident, $value, $map, $args): void {
\fprintf($value, '<%s> [%s] ', $ident, $map[$code]);
foreach (\array_filter($passed) as $i => $v) {
\fwrite($value, $args[$i] . ': "' . $v . '" ');
}
\fwrite($value, "\n");
}
);
}
private static function addNotification(array &$params, callable $notify): void
{
// Wrap the existing function if needed.
if (!isset($params['notification'])) {
$params['notification'] = $notify;
} else {
$params['notification'] = self::callArray([
$params['notification'],
$notify
]);
}
}
private static function callArray(array $functions): callable
{
return static function (...$args) use ($functions) {
foreach ($functions as $fn) {
$fn(...$args);
}
};
}
}