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<?php

class Requests_Transport_cURL implements Requests_Transport
{
    const CURL_7_10_5 = 0x70a05;
    const CURL_7_16_2 = 0x71002;
    public $headers = '';
    public $response_data = '';
    public $info;
    public $version;
    protected $handle;
    protected $hooks;
    protected $done_headers = false;
    protected $stream_handle;
    protected $response_bytes;
    protected $response_byte_limit;
    public function __construct()
    {
        $curl = curl_version();
        $this->version = $curl['version_number'];
        $this->handle = curl_init();
        curl_setopt($this->handle, CURLOPT_HEADER, false);
        curl_setopt($this->handle, CURLOPT_RETURNTRANSFER, 1);
        if ($this->version >= self::CURL_7_10_5) {
            curl_setopt($this->handle, CURLOPT_ENCODING, '');
        }
        if (defined('CURLOPT_PROTOCOLS')) {
            curl_setopt($this->handle, CURLOPT_PROTOCOLS, CURLPROTO_HTTP | CURLPROTO_HTTPS);
        }
        if (defined('CURLOPT_REDIR_PROTOCOLS')) {
            curl_setopt($this->handle, CURLOPT_REDIR_PROTOCOLS, CURLPROTO_HTTP | CURLPROTO_HTTPS);
        }
    }
    public function __destruct()
    {
        if (is_resource($this->handle)) {
            curl_close($this->handle);
        }
    }
    public function request($url, $headers = array(), $data = array(), $options = array())
    {
        $this->hooks = $options['hooks'];
        $this->setup_handle($url, $headers, $data, $options);
        $options['hooks']->dispatch('curl.before_send', array(&$this->handle));
        if ($options['filename'] !== false) {
            $this->stream_handle = fopen($options['filename'], 'wb');
        }
        $this->response_data = '';
        $this->response_bytes = 0;
        $this->response_byte_limit = false;
        if ($options['max_bytes'] !== false) {
            $this->response_byte_limit = $options['max_bytes'];
        }
        if (isset($options['verify'])) {
            if ($options['verify'] === false) {
                curl_setopt($this->handle, CURLOPT_SSL_VERIFYHOST, 0);
                curl_setopt($this->handle, CURLOPT_SSL_VERIFYPEER, 0);
            } elseif (is_string($options['verify'])) {
                curl_setopt($this->handle, CURLOPT_CAINFO, $options['verify']);
            }
        }
        if (isset($options['verifyname']) && $options['verifyname'] === false) {
            curl_setopt($this->handle, CURLOPT_SSL_VERIFYHOST, 0);
        }
        curl_exec($this->handle);
        $response = $this->response_data;
        $options['hooks']->dispatch('curl.after_send', array());
        if (curl_errno($this->handle) === 23 || curl_errno($this->handle) === 61) {
            curl_setopt($this->handle, CURLOPT_ENCODING, 'none');
            $this->response_data = '';
            $this->response_bytes = 0;
            curl_exec($this->handle);
            $response = $this->response_data;
        }
        $this->process_response($response, $options);
        curl_setopt($this->handle, CURLOPT_HEADERFUNCTION, null);
        curl_setopt($this->handle, CURLOPT_WRITEFUNCTION, null);
        return $this->headers;
    }
    public function request_multiple($requests, $options)
    {
        if (empty($requests)) {
            return array();
        }
        $multihandle = curl_multi_init();
        $subrequests = array();
        $subhandles = array();
        $class = get_class($this);
        foreach ($requests as $id => $request) {
            $subrequests[$id] = new $class();
            $subhandles[$id] = $subrequests[$id]->get_subrequest_handle($request['url'], $request['headers'], $request['data'], $request['options']);
            $request['options']['hooks']->dispatch('curl.before_multi_add', array(&$subhandles[$id]));
            curl_multi_add_handle($multihandle, $subhandles[$id]);
        }
        $completed = 0;
        $responses = array();
        $request['options']['hooks']->dispatch('curl.before_multi_exec', array(&$multihandle));
        do {
            $active = false;
            do {
                $status = curl_multi_exec($multihandle, $active);
            } while ($status === CURLM_CALL_MULTI_PERFORM);
            $to_process = array();
            while ($done = curl_multi_info_read($multihandle)) {
                $key = array_search($done['handle'], $subhandles, true);
                if (!isset($to_process[$key])) {
                    $to_process[$key] = $done;
                }
            }
            foreach ($to_process as $key => $done) {
                $options = $requests[$key]['options'];
                if (CURLE_OK !== $done['result']) {
                    $reason = curl_error($done['handle']);
                    $exception = new Requests_Exception_Transport_cURL($reason, Requests_Exception_Transport_cURL::EASY, $done['handle'], $done['result']);
                    $responses[$key] = $exception;
                    $options['hooks']->dispatch('transport.internal.parse_error', array(&$responses[$key], $requests[$key]));
                } else {
                    $responses[$key] = $subrequests[$key]->process_response($subrequests[$key]->response_data, $options);
                    $options['hooks']->dispatch('transport.internal.parse_response', array(&$responses[$key], $requests[$key]));
                }
                curl_multi_remove_handle($multihandle, $done['handle']);
                curl_close($done['handle']);
                if (!is_string($responses[$key])) {
                    $options['hooks']->dispatch('multiple.request.complete', array(&$responses[$key], $key));
                }
                $completed++;
            }
        } while ($active || $completed < count($subrequests));
        $request['options']['hooks']->dispatch('curl.after_multi_exec', array(&$multihandle));
        curl_multi_close($multihandle);
        return $responses;
    }
    public function &get_subrequest_handle($url, $headers, $data, $options)
    {
        $this->setup_handle($url, $headers, $data, $options);
        if ($options['filename'] !== false) {
            $this->stream_handle = fopen($options['filename'], 'wb');
        }
        $this->response_data = '';
        $this->response_bytes = 0;
        $this->response_byte_limit = false;
        if ($options['max_bytes'] !== false) {
            $this->response_byte_limit = $options['max_bytes'];
        }
        $this->hooks = $options['hooks'];
        return $this->handle;
    }
    protected function setup_handle($url, $headers, $data, $options)
    {
        $options['hooks']->dispatch('curl.before_request', array(&$this->handle));
        if (!isset($headers['Connection'])) {
            $headers['Connection'] = 'close';
        }
        $headers = Requests::flatten($headers);
        if (!empty($data)) {
            $data_format = $options['data_format'];
            if ($data_format === 'query') {
                $url = self::format_get($url, $data);
                $data = '';
            } elseif (!is_string($data)) {
                $data = http_build_query($data, null, '&');
            }
        }
        switch ($options['type']) {
            case Requests::POST:
                curl_setopt($this->handle, CURLOPT_POST, true);
                curl_setopt($this->handle, CURLOPT_POSTFIELDS, $data);
                break;
            case Requests::HEAD:
                curl_setopt($this->handle, CURLOPT_CUSTOMREQUEST, $options['type']);
                curl_setopt($this->handle, CURLOPT_NOBODY, true);
                break;
            case Requests::TRACE:
                curl_setopt($this->handle, CURLOPT_CUSTOMREQUEST, $options['type']);
                break;
            case Requests::PATCH:
            case Requests::PUT:
            case Requests::DELETE:
            case Requests::OPTIONS:
            default:
                curl_setopt($this->handle, CURLOPT_CUSTOMREQUEST, $options['type']);
                if (!empty($data)) {
                    curl_setopt($this->handle, CURLOPT_POSTFIELDS, $data);
                }
        }
        $timeout = max($options['timeout'], 1);
        if (is_int($timeout) || $this->version < self::CURL_7_16_2) {
            curl_setopt($this->handle, CURLOPT_TIMEOUT, ceil($timeout));
        } else {
            curl_setopt($this->handle, CURLOPT_TIMEOUT_MS, round($timeout * 1000));
        }
        if (is_int($options['connect_timeout']) || $this->version < self::CURL_7_16_2) {
            curl_setopt($this->handle, CURLOPT_CONNECTTIMEOUT, ceil($options['connect_timeout']));
        } else {
            curl_setopt($this->handle, CURLOPT_CONNECTTIMEOUT_MS, round($options['connect_timeout'] * 1000));
        }
        curl_setopt($this->handle, CURLOPT_URL, $url);
        curl_setopt($this->handle, CURLOPT_REFERER, $url);
        curl_setopt($this->handle, CURLOPT_USERAGENT, $options['useragent']);
        if (!empty($headers)) {
            curl_setopt($this->handle, CURLOPT_HTTPHEADER, $headers);
        }
        if ($options['protocol_version'] === 1.1) {
            curl_setopt($this->handle, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
        } else {
            curl_setopt($this->handle, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0);
        }
        if (true === $options['blocking']) {
            curl_setopt($this->handle, CURLOPT_HEADERFUNCTION, array(&$this, 'stream_headers'));
            curl_setopt($this->handle, CURLOPT_WRITEFUNCTION, array(&$this, 'stream_body'));
            curl_setopt($this->handle, CURLOPT_BUFFERSIZE, Requests::BUFFER_SIZE);
        }
    }
    public function process_response($response, $options)
    {
        if ($options['blocking'] === false) {
            $fake_headers = '';
            $options['hooks']->dispatch('curl.after_request', array(&$fake_headers));
            return false;
        }
        if ($options['filename'] !== false) {
            fclose($this->stream_handle);
            $this->headers = trim($this->headers);
        } else {
            $this->headers .= $response;
        }
        if (curl_errno($this->handle)) {
            $error = sprintf('cURL error %s: %s', curl_errno($this->handle), curl_error($this->handle));
            throw new Requests_Exception($error, 'curlerror', $this->handle);
        }
        $this->info = curl_getinfo($this->handle);
        $options['hooks']->dispatch('curl.after_request', array(&$this->headers, &$this->info));
        return $this->headers;
    }
    public function stream_headers($handle, $headers)
    {
        if ($this->done_headers) {
            $this->headers = '';
            $this->done_headers = false;
        }
        $this->headers .= $headers;
        if ($headers === "\r\n") {
            $this->done_headers = true;
        }
        return strlen($headers);
    }
    public function stream_body($handle, $data)
    {
        $this->hooks->dispatch('request.progress', array($data, $this->response_bytes, $this->response_byte_limit));
        $data_length = strlen($data);
        if ($this->response_byte_limit) {
            if ($this->response_bytes === $this->response_byte_limit) {
                return $data_length;
            }
            if ($this->response_bytes + $data_length > $this->response_byte_limit) {
                $limited_length = $this->response_byte_limit - $this->response_bytes;
                $data = substr($data, 0, $limited_length);
            }
        }
        if ($this->stream_handle) {
            fwrite($this->stream_handle, $data);
        } else {
            $this->response_data .= $data;
        }
        $this->response_bytes += strlen($data);
        return $data_length;
    }
    protected static function format_get($url, $data)
    {
        if (!empty($data)) {
            $url_parts = parse_url($url);
            if (empty($url_parts['query'])) {
                $query = $url_parts['query'] = '';
            } else {
                $query = $url_parts['query'];
            }
            $query .= '&' . http_build_query($data, null, '&');
            $query = trim($query, '&');
            if (empty($url_parts['query'])) {
                $url .= '?' . $query;
            } else {
                $url = str_replace($url_parts['query'], $query, $url);
            }
        }
        return $url;
    }
    public static function test($capabilities = array())
    {
        if (!function_exists('curl_init') || !function_exists('curl_exec')) {
            return false;
        }
        if (isset($capabilities['ssl']) && $capabilities['ssl']) {
            $curl_version = curl_version();
            if (!(CURL_VERSION_SSL & $curl_version['features'])) {
                return false;
            }
        }
        return true;
    }
}