<?php

namespace app\sys\controller;

use OSS\OssClient;
use think\facade\Request;
use DateTime;

class Base
{
    public function ossUpload($path, $exts)
    {
        $path = str_replace('\\', '/', $path);
        $filePath = [];
        // 检测要上传的文件格式是否正确
        foreach ($_FILES as $key => $file) {
            if ($file['size'] == 0) continue;
            $ext = pathinfo($file['name'], PATHINFO_EXTENSION);
            if (!in_array($ext, $exts)) {
                return ['code' => 1, 'msg' => '文件格式不正确'];
            }

            $filePath[$key] = ['name' => $file['tmp_name'], 'ext' => $ext];
        }

        $accessKeyId = config('app.ali_oss_access_key_id');
        $accessKeySecret = config('app.ali_oss_access_key_secret');
        $endpoint = config('app.ali_oss_end_point');
        $bucket = config('app.ali_oss_bucket');

        $oss = new OssClient($accessKeyId, $accessKeySecret, $endpoint);
        $path = trim($path, '/');
        $data = [];
        foreach ($filePath as $key => $f) {
            $fileName = date('Ymd') . '/' . date('His') . rand(1000, 9999) . '.' . $f['ext'];
            $p = $path . '/' . $fileName;
            $oss->uploadFile($bucket, $p, $f['name']);
            $data[$key] = $p;
        }

        return ['code' => 0, 'data' => $data];
    }

    /*
     * 富文本图片
     */
    public function imgUpload()
    {
        $bindUrl = config('app.ali_oss_bindurl');
        $data = [
            'src' => 'http://' . $bindUrl . '/' . Request::param('file'),
            'title' => ''
        ];

        return json(['code' => 0, 'msg' => '', 'data' => $data]);
    }


    public function ossSignature()
    {
        $cate = input('cate');

        $id = config('app.ali_oss_access_key_id');          // 请填写您的AccessKeyId。
        $key = config('app.ali_oss_access_key_secret');     // 请填写您的AccessKeySecret。
        // $host的格式为 bucketname.endpoint，请替换为您的真实信息。
        $host = 'https://'.config('app.ali_oss_bindurl');
        // $callbackUrl为上传回调服务器的URL，请将下面的IP和Port配置为您自己的真实URL信息。
        $callbackUrl = 'https://' . $_SERVER['HTTP_HOST'] . '/sys/video/osscallback.html';
        if ($cate) {
            $dir = $cate . '/';          // 用户上传文件时指定的前缀。
        } else {
            $dir = 'videos/';          // 用户上传文件时指定的前缀。
        }

        $callback_param = array(
            'callbackUrl' => $callbackUrl,
            'callbackBody' => 'filename=${object}&size=${size}&mimeType=${mimeType}&height=${imageInfo.height}&width=${imageInfo.width}',
            'callbackBodyType' => "application/x-www-form-urlencoded"
        );
        $callback_string = json_encode($callback_param);

        $base64_callback_body = base64_encode($callback_string);
        $now = time();
        $expire = 30;  //设置该policy超时时间是10s. 即这个policy过了这个有效时间，将不能访问。
        $end = $now + $expire;
        $expiration = $this->gmt_iso8601($end);


        //最大文件大小.用户可以自己设置
        $condition = array(0 => 'content-length-range', 1 => 0, 2 => 1048576000);
        $conditions[] = $condition;

        // 表示用户上传的数据，必须是以$dir开始，不然上传会失败，这一步不是必须项，只是为了安全起见，防止用户通过policy上传到别人的目录。
        $start = array(0 => 'starts-with', 1 => '$key', 2 => $dir);
        $conditions[] = $start;


        $arr = array('expiration' => $expiration, 'conditions' => $conditions);
        $policy = json_encode($arr);
        $base64_policy = base64_encode($policy);
        $string_to_sign = $base64_policy;
        $signature = base64_encode(hash_hmac('sha1', $string_to_sign, $key, true));

        $response = array();
        $response['accessid'] = $id;
        $response['host'] = $host;
        $response['policy'] = $base64_policy;
        $response['signature'] = $signature;
        $response['expire'] = $end;
        $response['callback'] = $base64_callback_body;
        $response['dir'] = $dir;  // 这个参数是设置用户上传文件时指定的前缀。
        return json($response);
    }

    private function gmt_iso8601($time)
    {
        $dtStr = date("c", $time);
        $mydatetime = new DateTime($dtStr);
        $expiration = $mydatetime->format(DateTime::ISO8601);
        $pos = strpos($expiration, '+');
        $expiration = substr($expiration, 0, $pos);
        return $expiration . "Z";
    }


    public function osscallback()
    {
        // 1.获取OSS的签名header和公钥url header
        $authorizationBase64 = "";
        $pubKeyUrlBase64 = "";
        /*
         * 注意：如果要使用HTTP_AUTHORIZATION头，你需要先在apache或者nginx中设置rewrite，以apache为例，修改
         * 配置文件/etc/httpd/conf/httpd.conf(以你的apache安装路径为准)，在DirectoryIndex index.php这行下面增加以下两行
            RewriteEngine On
            RewriteRule .* - [env=HTTP_AUTHORIZATION:%{HTTP:Authorization},last]
         * */
        trace($_SERVER, 'debug');
        if (isset($_SERVER['HTTP_AUTHORIZATION'])) {
            $authorizationBase64 = $_SERVER['HTTP_AUTHORIZATION'];
        }
        if (isset($_SERVER['HTTP_X_OSS_PUB_KEY_URL'])) {
            $pubKeyUrlBase64 = $_SERVER['HTTP_X_OSS_PUB_KEY_URL'];
        }

        if ($authorizationBase64 == '' || $pubKeyUrlBase64 == '') {
            header("http/1.1 403 Forbidden");
            exit();
        }

        // 2.获取OSS的签名
        $authorization = base64_decode($authorizationBase64);

        // 3.获取公钥
        $pubKeyUrl = base64_decode($pubKeyUrlBase64);
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $pubKeyUrl);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);
        $pubKey = curl_exec($ch);
        if ($pubKey == "") {
            //header("http/1.1 403 Forbidden");
            exit();
        }

        // 4.获取回调body
        $body = file_get_contents('php://input');

        // 5.拼接待签名字符串
        $authStr = '';
        $path = $_SERVER['REQUEST_URI'];
        $pos = strpos($path, '?');
        if ($pos === false) {
            $authStr = urldecode($path) . "\n" . $body;
        } else {
            $authStr = urldecode(substr($path, 0, $pos)) . substr($path, $pos, strlen($path) - $pos) . "\n" . $body;
        }

        // 6.验证签名
        $ok = openssl_verify($authStr, $authorization, $pubKey, OPENSSL_ALGO_MD5);
        if ($ok == 1) {
            header("Content-Type: application/json");
            $data = array("Status" => "Ok");
            return json($data);
        } else {
            //header("http/1.1 403 Forbidden");
            exit();
        }
    }
}