erp/core/CoreApp/models/Model_aliyunoss.php

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); 
class Model_aliyunoss extends Lin_Model 
{
	function __construct(){
        parent::__construct();
        $this->load->_model(" Model_setting","setting");
    }
    private $oss_basic_url = "https://lyerp-product-source.oss-cn-beijing.aliyuncs.com";
    private $show_basie_url ="http://lyerposs.wepolicy.cn"; 
    private function get_oss_config(){
        $oss_aliyun_id_info = $this->setting->find('skey = "oss_aliyun_id"');
        $oss_aliyun_key_info = $this->setting->find('skey = "oss_aliyun_key"');
        $accessKeyId =  $oss_aliyun_id_info['svalue'];
        $accessKeySecret = $oss_aliyun_key_info['svalue'];
        $bucket = "lyerp-product-source";
        $endpoint = "oss-cn-beijing.aliyuncs.com";
        $region = "oss-cn-beijing";
        $host = $bucket.".".$endpoint;

        return [
            'accessKeyId' => $accessKeyId,
            'accessKeySecret' => $accessKeySecret,
            'bucket' => $bucket,
            'endpoint' => $endpoint,
            'region'     => $region,
            'host' => $host,
        ];

    }

    public function getOssSign(){
        $conf = $this->get_oss_config();
        $accessKeyId = $conf['accessKeyId'];
        $accessKeySecret = $conf['accessKeySecret'];
        $region = $conf['region'];
        $bucket = $conf['bucket'];
        $endpoint = $conf['endpoint'];
        $host = $conf['host'];

        // 1. 获取OSS的签名信息
        $date_folder = date('Ymd');
        $dir = "uploads/{$date_folder}/";

        //1 .设置上传子目录(按日期分类)
        $expiration = date('Y-m-d\TH:i:s\Z', time() + 300); // 5分钟后过期
        $conditions = [
            ["content-length-range", 0, 1048576000], // 限制文件大小，这里设置为最大1GB
            ["starts-with", '$key', $dir] // 限制文件上传的目录前缀
        ];
        $policy = json_encode(['expiration' => $expiration, 'conditions' => $conditions]);
        $base64Policy = base64_encode($policy);
        // 2. 计算签名
        $signature = base64_encode(hash_hmac('sha1', $base64Policy, $accessKeySecret, true));

        // 3. 返回给前端的数据
        $response = [
            'accessKeyId'  => $accessKeyId,
            'accessKeySecret'=>$accessKeySecret,
            'bucket'    => $bucket,
            'region'    => $region,
            'dir'       => $dir,
            'policy'    => $base64Policy,
            'signature' => $signature,
            'host'      => $host,
            'expire'    => time() + 3600,
            'oss_url'=>$this->oss_basic_url,
            'show_url'=>$this->show_basie_url
        ];
        return [
            'code'=>1,
            'msg'=>'success',
            'data'=>$response
        ];
    }

}