<?php
// +----------------------------------------------------------------------
// | CRMEB [ CRMEB赋能开发者，助力企业发展 ]
// +----------------------------------------------------------------------
// | Copyright (c) 2016~2026 https://www.crmeb.com All rights reserved.
// +----------------------------------------------------------------------
// | Licensed CRMEB并不是自由软件，未经许可不能去掉CRMEB相关版权
// +----------------------------------------------------------------------
// | Author: CRMEB Team <admin@crmeb.com>
// +----------------------------------------------------------------------

namespace crmeb\services;

/**
 * Class HttpService
 * @package crmeb\services
 */
class HttpService
{
    /**
     * 错误信息
     * @var string|null
     */
    private static string|null $curlError;

    /**
     * header头信息
     * @var string|null
     */
    private static string|null $headerStr;

    /**
     * 请求状态
     * @var int
     */
    private static $status;

    /**
     * @return string
     */
    public static function getCurlError()
    {
        return self::$curlError;
    }

    /**
     * @return mixed
     */
    public static function getStatus()
    {
        return self::$status;
    }

    /**
     * 模拟GET发起请求
     * @param $url
     * @param array $data
     * @param bool $header
     * @param int $timeout
     * @return bool|string
     */
    public static function getRequest($url, $data = array(), $header = false, $timeout = 10)
    {
        if (!empty($data)) {
            $url .= (stripos($url, '?') === false ? '?' : '&');
            $url .= (is_array($data) ? http_build_query($data) : $data);
        }

        return self::request($url, 'get', array(), $header, $timeout);
    }

    /**
     * 在 Swoole 下对 HTTPS 使用 PHP 流请求，避免未编译 OpenSSL 的 Swoole curl 报错
     * @param string $url
     * @param string $method
     * @param array $data
     * @param array|false $header
     * @param int $timeout
     * @return bool|string
     */
    private static function requestByStream(string $url, string $method, array $data, $header, int $timeout): bool|string
    {
        $method = strtoupper($method);
        if ($method === 'GET' && !empty($data)) {
            $url .= (strpos($url, '?') === false ? '?' : '&') . http_build_query($data);
        }
        $opts = [
            'http' => [
                'method' => $method,
                'timeout' => (float) $timeout,
                'ignore_errors' => true,
            ],
            'ssl' => [
                'verify_peer' => false,
                'verify_peer_name' => false,
            ],
        ];
        if ($header !== false && is_array($header)) {
            $opts['http']['header'] = implode("\r\n", $header);
        }
        if ($method === 'POST' && !empty($data)) {
            $opts['http']['content'] = is_array($data) ? http_build_query($data) : $data;
        }
        $ctx = stream_context_create($opts);
        $content = @file_get_contents($url, false, $ctx);
        if ($content === false) {
            self::$status = null;
            self::$curlError = 'stream request failed';
            return false;
        }
        $responseHeaders = $http_response_header ?? [];
        self::$headerStr = implode("\r\n", $responseHeaders);
        $code = 0;
        if (!empty($responseHeaders[0]) && preg_match('/\d{3}/', $responseHeaders[0], $m)) {
            $code = (int) $m[0];
        }
        self::$status = ['http_code' => $code, 'header_size' => 0];
        return $code === 200 ? $content : false;
    }

    /**
     * curl 请求
     * @param $url
     * @param string $method
     * @param array $data
     * @param bool $header
     * @param int $timeout
     * @return bool|string
     */
    public static function request($url, $method = 'get', $data = array(), $header = false, $timeout = 15)
    {
        self::$status = null;
        self::$curlError = null;
        self::$headerStr = null;

        $method = strtoupper($method);
        $isHttps = (strpos($url, 'https://') === 0);
        $inSwoole = extension_loaded('swoole') && class_exists(\Swoole\Coroutine::class, false);

        // Swoole 未编译 OpenSSL 时，curl 无法请求 HTTPS，改用 PHP 流
        if ($inSwoole && $isHttps) {
            return self::requestByStream($url, $method, is_array($data) ? $data : [], $header, $timeout ?: 300);
        }

        $curl = curl_init($url);
        //请求方式
        curl_setopt($curl, CURLOPT_CUSTOMREQUEST, $method);
        //post请求
        if ($method == 'POST') {
            curl_setopt($curl, CURLOPT_POSTFIELDS, is_array($data) ? http_build_query($data) : $data);
        } elseif ($method == 'GET' && count($data)) {
            $url .= '?' . http_build_query($data);
            curl_setopt($curl, CURLOPT_URL, $url);
        }
        //超时时间
        curl_setopt($curl, CURLOPT_TIMEOUT, 300);
        //设置header头
        if ($header !== false) curl_setopt($curl, CURLOPT_HTTPHEADER, $header);

        curl_setopt($curl, CURLOPT_FAILONERROR, false);
        //返回抓取数据
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
        //输出header头信息
        curl_setopt($curl, CURLOPT_HEADER, true);
        //TRUE 时追踪句柄的请求字符串，从 PHP 5.1.3 开始可用。这个很关键，就是允许你查看请求header
        curl_setopt($curl, CURLINFO_HEADER_OUT, true);
        //https请求
        if (1 == strpos("$" . $url, "https://")) {
            curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
            curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);
        }
        self::$curlError = curl_error($curl);

        [$content, $status] = [curl_exec($curl), curl_getinfo($curl), curl_close($curl)];
        self::$status = $status;
        self::$headerStr = trim(substr($content, 0, $status['header_size']));
        $content = trim(substr($content, $status['header_size']));
        return (intval($status["http_code"]) === 200) ? $content : false;
    }

    /**
     * 模拟POST发起请求
     * @param $url
     * @param array $data
     * @param bool $header
     * @param int $timeout
     * @return bool|string
     */
    public static function postRequest($url, $data = [], $header = false, $timeout = 10)
    {
        return self::request($url, 'post', $data, $header, $timeout);
    }

    /**
     * 获取header头字符串类型
     * @return mixed
     */
    public static function getHeaderStr()
    {
        return self::$headerStr;
    }

    /**
     * 获取header头数组类型
     * @return array
     */
    public static function getHeader()
    {
        $headArr = explode("\r\n", self::$headerStr);
        return $headArr;
    }

}