原 OSS服务端签名后直传java

版权声明：本文为博主原创文章，请尊重他人的劳动成果，转载请附上原文出处链接和本声明。
本文链接：https://www.91mszl.com/zhangwuji/article/details/1394

一：OSS服务端签名流程图

二：编写签名代码

package com.mszl.thirdparty.controller;

import com.aliyun.oss.OSSClient;
import com.aliyun.oss.common.utils.BinaryUtil;
import com.aliyun.oss.model.MatchMode;
import com.aliyun.oss.model.PolicyConditions;
import com.mszl.common.utils.DateUtils;
import com.mszl.common.utils.ReturnMsgUtils;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.Date;
import java.util.LinkedHashMap;
import java.util.Map;

@RestController
@RequestMapping("/oss")
public class OssController {

    @Value("${alibaba.cloud.access-key}")
    private String accessId;

    @Value("${alibaba.cloud.secret-key}")
    private String accessKey;

    @Value("${alibaba.cloud.oss.endpoint}")
    private String endpoint;

    @Value("${alibaba.cloud.oss.bucket}")
    private String bucket;


    /**
    * 功能：OSS服务端签名
    * @Author: zxb
    * @Date: 2022-05-11 17:47:46
    */
    @GetMapping("/sign")
    public ReturnMsgUtils signature(){
        String host="http://" + bucket + "." + endpoint; // host的格式为 bucketname.endpoint
        String callbackUrl="http://88.88.88.88.:8888"; // 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信息。
        String dt=String.valueOf(DateUtils.currentDate());
        String dir=dt+"/"; // 用户上传文件时指定的前缀。

        OSSClient client=new OSSClient(endpoint, accessId, accessKey);
        Map<String, String> respMap=null;
        try {
            long expireTime=30;
            long expireEndTime=System.currentTimeMillis() + expireTime * 1000;
            Date expiration=new Date(expireEndTime);
            PolicyConditions policyConds=new PolicyConditions();
            policyConds.addConditionItem(PolicyConditions.COND_CONTENT_LENGTH_RANGE, 0, 1048576000);
            policyConds.addConditionItem(MatchMode.StartWith, PolicyConditions.COND_KEY, dir);

            String postPolicy=client.generatePostPolicy(expiration, policyConds);
            byte[] binaryData=postPolicy.getBytes("utf-8");
            String encodedPolicy=BinaryUtil.toBase64String(binaryData);
            String postSignature=client.calculatePostSignature(postPolicy);

            respMap=new LinkedHashMap<String, String>();
            respMap.put("accessid", accessId);
            respMap.put("policy", encodedPolicy);
            respMap.put("signature", postSignature);
            respMap.put("dir", dir);
            respMap.put("host", host);
            respMap.put("expire", String.valueOf(expireEndTime / 1000));
            // respMap.put("expire", formatISO8601Date(expiration));
        } catch (Exception e) {
            System.out.println(e.getMessage());
        }

        ReturnMsgUtils result=ReturnMsgUtils.success(respMap);
        return result;
    }


}

配置文件如下

alibaba:
  cloud:
    access-key: LTXXXX
    secret-key: pw1tjxxxx
    oss:
      endpoint: oss-cn-shanghai.aliyuncs.com
      bucket: mszh-shop #此属性是我们自定义的

官网截图如下：

三：使用postman调用接口返回如下信息

{
    "code": 200,
    "msg": "恭喜您, 操作成功",
    "data": {
        "accessid": "LTAI5tIPJKDFLSDJROEWDSLFJL",
        "policy": "eyJleHBpcmF0a9uZGl0aW9ucyI6W1siY29udGVudC1sZW5ndGgtcmFuZ2UiLDAsMTA0ODU3NjAwMF0sWyJzdGFydHMtd2l0aCIsIiRrZXkiLCIyMDIyLTA1LTExLyJdXX0=",
        "signature": "P1TZB10Ctc36BmyrN9cMejMcIGY=",
        "dir": "2022-05-11/",
        "host": "http://mszh-shop.oss-cn-shanghai.aliyuncs.com",
        "expire": "1652264085"
    },
    "extData": null
}

官方文档：

https://help.aliyun.com/document_detail/31926.html

https://help.aliyun.com/document_detail/91868.htm?spm=a2c4g.11186623.0.0.16075d3fnjOPNd#concept-ahk-rfz-2fb