<?php
namespace app\utils;

class CurlUtil{

    public static function getHttp($url,$ssl = true){
        $domain = $_SERVER['HTTP_HOST'];
        $http = 'http://';
        $ssl && $http = ((isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] == 'on') || (isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https')) ? 'https://' : 'http://';

        return $http.$domain.$url;
    }

    /**
     * 模拟http get请求
     * @param $url
     * @param array $params
     * @param array $header
     * @param int $timeout
     * @return bool|string
     * @throws \Exception
     */
    public static function get($url, $params=array(), $header = array(),$timeout=30){
        $opts = array(
            CURLOPT_TIMEOUT => $timeout,
            CURLOPT_RETURNTRANSFER => 1,
            CURLOPT_SSL_VERIFYPEER => false,
            CURLOPT_SSL_VERIFYHOST => false,
            CURLOPT_HTTPHEADER => $header,
            CURLOPT_URL => count($params) > 0 ? $url . '?' . http_build_query($params) : $url,
        );
        $ch = curl_init();
        curl_setopt_array($ch, $opts);
        $data = curl_exec($ch);
        $error = curl_error($ch);
        curl_close($ch);
        if ($error)
            throw new \Exception('http get error：' . $error);
        return $data;
    }

    /**
     * 模拟http post请求
     * @param $url
     * @param $params
     * @param array $header
     * @param int $timeout
     * @return bool|string
     * @throws \Exception
     */
    public static function post($url, $params, $header = array(), $timeout=30){
        $opts = array(
            CURLOPT_TIMEOUT => $timeout,
            CURLOPT_RETURNTRANSFER => 1,
            CURLOPT_SSL_VERIFYPEER => false,
            CURLOPT_SSL_VERIFYHOST => false,
            CURLOPT_HTTPHEADER => $header,
            CURLOPT_URL => $url,
            CURLOPT_POST => 1,
            CURLOPT_POSTFIELDS => is_array($params) ? http_build_query($params) : $params
        );
        $ch = curl_init();
        curl_setopt_array($ch, $opts);
        $data = curl_exec($ch);
        $error = curl_error($ch);
        curl_close($ch);
        if ($error)
            throw new \Exception('http post error：' . $error);
        return $data;
    }

    /**
     * 模拟http post json请求
     * @param string $url
     * @param array $params
     * @param array $header
     * @param int $timeout
     * @return bool|string
     * @throws \Exception
     */
    public static function postJson(string $url, array $params, array $header = [], int $timeout=30){
        $opts = [
            CURLOPT_TIMEOUT => $timeout,
            CURLOPT_RETURNTRANSFER => 1,
            CURLOPT_SSL_VERIFYPEER => false,
            CURLOPT_SSL_VERIFYHOST => false,
            CURLOPT_HTTPHEADER => array_merge(["content-type:application/json"],$header),
            CURLOPT_URL => $url,
            CURLOPT_POST => 1,
            CURLOPT_POSTFIELDS => json_encode($params)
        ];
        $ch = curl_init();
        curl_setopt_array($ch, $opts);
        $data = curl_exec($ch);
        $error = curl_error($ch);
        curl_close($ch);
        if ($error)
            throw new \Exception('http post error：' . $error);
        return json_decode($data,true);
    }
}