<?php
namespace GuzzleHttp\Handler;
use GuzzleHttp\Exception\ConnectException;
use GuzzleHttp\Exception\RequestException;
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;
/**
* HTTP handler that uses PHP's HTTP stream wrapper.
*/
class StreamHandler
{
private $lastHeaders = [];
/**
* Sends an HTTP request.
*
* @param RequestInterface $request Request to send.
* @param array $options Request transfer options.
*
* @return PromiseInterface
*/
public function __invoke(RequestInterface $request, array $options)
{
// Sleep if there is a delay specified.
if (isset($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 = $e->getMessage();
// This list can probably get more comprehensive.
if (strpos($message, 'getaddrinfo') // DNS lookup failed
|| strpos($message, 'Connection refused')
|| strpos($message, "couldn't connect to host") // error on HHVM
|| strpos($message, "connection attempt failed")
) {
$e = new ConnectException($e->getMessage(), $request, $e);
}
$e = RequestException::wrapException($request, $e);
$this->invokeStats($options, $request, $startTime, null, $e);
return \GuzzleHttp\Promise\rejection_for($e);
}
}
private function invokeStats(
array $options,
RequestInterface $request,
$startTime,
ResponseInterface $response = null,
$error = null
) {
if (isset($options['on_stats'])) {
$stats = new TransferStats(
$request,
$response,
Utils::currentTime() - $startTime,
$error,
[]
);
call_user_func($options['on_stats'], $stats);
}
}
private function createResponse(
RequestInterface $request,
array $options,
$stream,
$startTime
) {
$hdrs = $this->lastHeaders;
$this->lastHeaders = [];
$parts = explode(' ', array_shift($hdrs), 3);
$ver = explode('/', $parts[0])[1];
$status = $parts[1];
$reason = isset($parts[2]) ? $parts[2] : null;
$headers = \GuzzleHttp\headers_from_lines($hdrs);
list($stream, $headers) = $this->checkDecode($options, $headers, $stream);
$stream = Psr7\stream_for($stream);
$sink = $stream;
if (strcasecmp('HEAD', $request->getMethod())) {
$sink = $this->createSink($stream, $options);
}
$response = new Psr7\Response($status, $headers, $sink, $ver, $reason);
if (isset($options['on_headers'])) {
try {
$options['on_headers']($response);
} catch (\Exception $e) {
$msg = 'An error was encountered during the on_headers event';
$ex = new RequestException($msg, $request, $response, $e);
return \GuzzleHttp\Promise\rejection_for($ex);
}
}
// 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 $options)
{
if (!empty($options['stream'])) {
return $stream;
}
$sink = isset($options['sink'])
? $options['sink']
: fopen('php://temp', 'r+');
return is_string($sink)
? new Psr7\LazyOpenStream($sink, 'w+')
: Psr7\stream_for($sink);
}
private function checkDecode(array $options, array $headers, $stream)
{
// Automatically decode responses when instructed.
if (!empty($options['decode_content'])) {
$normalizedKeys = \GuzzleHttp\normalize_header_keys($headers);
if (isset($normalizedKeys['content-encoding'])) {
$encoding = $headers[$normalizedKeys['content-encoding']];
if ($encoding[0] === 'gzip' || $encoding[0] === 'deflate') {
$stream = new Psr7\InflateStream(
Psr7\stream_for($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 StreamInterface $source
* @param StreamInterface $sink
* @param string $contentLength Header specifying the amount of
* data to read.
*
* @return StreamInterface
* @throws \RuntimeException when the sink option is invalid.
*/
private function drain(
StreamInterface $source,
StreamInterface $sink,
$contentLength
) {
// 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\copy_to_stream(
$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)
{
$errors = null;
set_error_handler(function ($_, $msg, $file, $line) use (&$errors) {
$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;
}
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'])
&& is_array($options['auth'])
&& isset($options['auth'][2])
&& 'ntlm' == $options['auth'][2]
) {
throw new \InvalidArgumentException('Microsoft NTLM authentication only supported with curl handler');
}
$uri = $this->resolveHost($request, $options);
$context = $this->createResource(
function () use ($context, $params) {
return stream_context_create($context, $params);
}
);
return $this->createResource(
function () use ($uri, &$http_response_header, $context, $options) {
$resource = fopen((string) $uri, 'r', null, $context);
$this->lastHeaders = $http_response_header;
if (isset($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)
{
$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 (!isset($records[0]['ip'])) {
throw new ConnectException(
sprintf(
"Could not resolve IPv4 address for host '%s'",
$uri->getHost()
),
$request
);
}
$uri = $uri->withHost($records[0]['ip']);
} elseif ('v6' === $options['force_ip_resolve']) {
$records = dns_get_record($uri->getHost(), DNS_AAAA);
if (!isset($records[0]['ipv6'])) {
throw new ConnectException(
sprintf(
"Could not resolve IPv6 address for host '%s'",
$uri->getHost()
),
$request
);
}
$uri = $uri->withHost('[' . $records[0]['ipv6'] . ']');
}
}
return $uri;
}
private function getDefaultContext(RequestInterface $request)
{
$headers = '';
foreach ($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;
}
private function add_proxy(RequestInterface $request, &$options, $value, &$params)
{
if (!is_array($value)) {
$options['http']['proxy'] = $value;
} else {
$scheme = $request->getUri()->getScheme();
if (isset($value[$scheme])) {
if (!isset($value['no'])
|| !\GuzzleHttp\is_host_in_noproxy(
$request->getUri()->getHost(),
$value['no']
)
) {
$options['http']['proxy'] = $value[$scheme];
}
}
}
}
private function add_timeout(RequestInterface $request, &$options, $value, &$params)
{
if ($value > 0) {
$options['http']['timeout'] = $value;
}
}
private function add_verify(RequestInterface $request, &$options, $value, &$params)
{
if ($value === true) {
// PHP 5.6 or greater will find the system cert by default. When
// < 5.6, use the Guzzle bundled cacert.
if (PHP_VERSION_ID < 50600) {
$options['ssl']['cafile'] = \GuzzleHttp\default_ca_bundle();
}
} elseif (is_string($value)) {
$options['ssl']['cafile'] = $value;
if (!file_exists($value)) {
throw new \RuntimeException("SSL CA bundle not found: $value");
}
} elseif ($value === false) {
$options['ssl']['verify_peer'] = false;
$options['ssl']['verify_peer_name'] = false;
return;
} else {
throw new \InvalidArgumentException('Invalid verify request option');
}
$options['ssl']['verify_peer'] = true;
$options['ssl']['verify_peer_name'] = true;
$options['ssl']['allow_self_signed'] = false;
}
private function add_cert(RequestInterface $request, &$options, $value, &$params)
{
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;
}
private function add_progress(RequestInterface $request, &$options, $value, &$params)
{
$this->addNotification(
$params,
function ($code, $a, $b, $c, $transferred, $total) use ($value) {
if ($code == STREAM_NOTIFY_PROGRESS) {
$value($total, $transferred, null, null);
}
}
);
}
private function add_debug(RequestInterface $request, &$options, $value, &$params)
{
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'];
$value = \GuzzleHttp\debug_resource($value);
$ident = $request->getMethod() . ' ' . $request->getUri()->withFragment('');
$this->addNotification(
$params,
function () use ($ident, $value, $map, $args) {
$passed = func_get_args();
$code = array_shift($passed);
fprintf($value, '<%s> [%s] ', $ident, $map[$code]);
foreach (array_filter($passed) as $i => $v) {
fwrite($value, $args[$i] . ': "' . $v . '" ');
}
fwrite($value, "\n");
}
);
}
private function addNotification(array &$params, callable $notify)
{
// Wrap the existing function if needed.
if (!isset($params['notification'])) {
$params['notification'] = $notify;
} else {
$params['notification'] = $this->callArray([
$params['notification'],
$notify
]);
}
}
private function callArray(array $functions)
{
return function () use ($functions) {
$args = func_get_args();
foreach ($functions as $fn) {
call_user_func_array($fn, $args);
}
};
}
}
