OSS
阿里云对象存储服务（Object Storage Service，简称 OSS），是阿里云提供的海量、安全、低成本、高可靠的云存储服务。OSS可用于图片、音视频、日志等海量文件的存储。各种终端设备、Web网站程序、移动应用可以直接向OSS写入或读取数据。
OSS中得到相关概念
- Endpoint：访问域名，通过该域名可以访问OSS服务的API，进行文件上传、下载等操作。
- Bucket：存储空间，是存储对象的容器，所有存储对象都必须隶属于某个存储空间。
- Object：对象，对象是 OSS 存储数据的基本单元，也被称为 OSS 的文件。
- AccessKey：访问密钥，指的是访问身份验证中用到的 AccessKeyId 和 AccessKeySecret。
OSS服务端签名后前端直传的相关说明
流程介绍
- Web前端请求应用服务器，获取上传所需参数（如OSS的accessKeyId、policy、callback等参数）
- 应用服务器返回相关参数
- Web前端直接向OSS服务发起上传文件请求
- 等上传完成后OSS服务会回调应用服务器的回调接口
- 应用服务器返回响应给OSS服务
- OSS服务将应用服务器回调接口的内容返回给Web前端
整合OSS实现文件上传
一、添加依赖
<!-- OSS SDK 相关依赖 -->
<dependency>
<groupId>com.aliyun.oss</groupId>
<artifactId>aliyun-sdk-oss</artifactId>
<version>2.5.0</version>
</dependency>
二、修改配置文件
# OSS相关配置信息
aliyun:
oss:
endpoint: xtslife-oss.oss-cn-chengdu.aliyuncs.com # oss对外服务的访问域名
accessKeyId: test # 访问身份验证中用到用户标识
accessKeySecret: test # 用户用于加密签名字符串和oss用来验证签名字符串的密钥
bucketName: xtslife-oss # oss的存储空间
policy:
expire: 300 # 签名有效期(S)
maxSize: 10 # 上传文件大小(M)
callback: http://localhost:8080/aliyun/oss/callback # 文件上传成功后的回调地址
dir:
prefix: xtslife/images/ # 上传文件夹路径前缀
注意：注意：endpoint、accessKeyId、accessKeySecret、bucketName、callback、prefix都要改为你自己帐号OSS相关的，callback需要是公网可以访问的地址
三、添加OSS的相关java配置
package top.xtslife.practice.config;
import com.aliyun.oss.OSSClient;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
/**
* 用于配置OSS的连接客户端OSSClient。
* @Author 小涛
* @Create 2019-08-16 18:04
*/
@Configuration
public class OssConfig {
@Value("${aliyun.oss.endpoint}")
private String ALIYUN_OSS_ENDPOINT;
@Value("${aliyun.oss.accessKeyId}")
private String ALIYUN_OSS_ACCESSKEYID;
@Value("${aliyun.oss.accessKeySecret}")
private String ALIYUN_OSS_ACCESSKEYSECRET;
@Bean
public OSSClient ossClient(){
return new OSSClient(ALIYUN_OSS_ENDPOINT,ALIYUN_OSS_ACCESSKEYID,ALIYUN_OSS_ACCESSKEYSECRET);
}
}
四、添加OSS上传策略封装对象OssPolicyResult
前端直接上传文件时所需参数，从后端返回过来。
package top.xtslife.practice.component;
import io.swagger.annotations.ApiModelProperty;
import lombok.Data;
/**
* 获取OSS上传文件授权返回结果
* @Author 小涛
* @Create 2019-08-16 19:05
*/
@Data
public class OssPolicyResult {
@ApiModelProperty("访问身份验证中用到用户标识")
private String accessKeyId;
@ApiModelProperty("用户表单上传的策略，经过base64编码过的字符串")
private String policy;
@ApiModelProperty("对policy签名后的字符串")
private String signature;
@ApiModelProperty("上传文件夹路径前缀")
private String dir;
@ApiModelProperty("oss对外服务的访问域名")
private String host;
@ApiModelProperty("上传成功后的回调设置")
private String callback;
}
五、添加OSS上传成功后的回调参数对象OssCallbackParam
当OSS上传成功后，会根据该配置参数来回调对应接口
package top.xtslife.practice.component;
import io.swagger.annotations.ApiModelProperty;
import lombok.Data;
/**
* oss上传成功后的回调参数
* @Author 小涛
* @Create 2019-08-16 19:34
*/
@Data
public class OssCallbackParam {
@ApiModelProperty("请求的回调地址")
private String callbackUrl;
@ApiModelProperty("回调是传入request中的参数")
private String callbackBody;
@ApiModelProperty("回调时传入参数格式，比如表单提交形式")
private String callbackBodyType;
}
六、OSS上传成功后的回调结果对象OssCallbackResult
回调接口中返回的数据对象，封装了上传文件的信息。
package top.xtslife.practice.component;
import io.swagger.annotations.ApiModelProperty;
import lombok.Data;
/**
* @Author 小涛
* @Create 2019-08-16 19:54
*/
@Data
public class OssCallbackResult {
@ApiModelProperty("文件名称")
private String filename;
@ApiModelProperty("文件大小")
private String size;
@ApiModelProperty("文件的mimeType")
private String mimeType;
@ApiModelProperty("图片文件的宽")
private String width;
@ApiModelProperty("图片文件的高")
private String height;
}
七、添加OSS业务接口OssService
package top.xtslife.practice.Service;
import top.xtslife.practice.component.OssCallbackResult;
import top.xtslife.practice.component.OssPolicyResult;
import javax.servlet.http.HttpServletRequest;
/**
* oss上传管理Service
* @Author 小涛
* @Create 2019-08-16 20:22
*/
public interface OssService {
/**
* oss 上传生成策略
* @return
*/
OssPolicyResult policy();
/**
* oss上传成功回调
* @param request
* @return
*/
OssCallbackResult callback(HttpServletRequest request);
}
八、添加OSS业务接口OssService的实现类OssServiceImpl
package top.xtslife.practice.Service.impl;
import cn.hutool.json.JSONUtil;
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 org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import top.xtslife.practice.Service.OssService;
import top.xtslife.practice.component.OssCallbackParam;
import top.xtslife.practice.component.OssCallbackResult;
import top.xtslife.practice.component.OssPolicyResult;
import javax.servlet.http.HttpServletRequest;
import java.text.SimpleDateFormat;
import java.util.Date;
/**
* oss上传管理Service实现类
* @Author 小涛
* @Create 2019-08-16 20:28
*/
@Service
public class OssServiceImpl implements OssService {
private static final Logger LOGGER = LoggerFactory.getLogger(OssServiceImpl.class);
@Value("${aliyun.oss.policy.expire}")
private int ALIYUN_OSS_EXPIRE;
@Value(("${aliyun.oss.maxSize}"))
private int ALIYUN_OSS_MAX_SIZE;
@Value("${aliyun.oss.callback}")
private String ALIYUN_OSS_CALLBACK;
@Value("${aliyun.oss.bucketName}")
private String ALIYUN_OSS_BUCKET_NAME;
@Value("${aliyun.oss.endpoint}")
private String ALIYUN_OSS_ENDPOINT;
@Value("${aliyun.oss.dir.prefix}")
private String ALIYUN_OSS_DIR_PREFIX;
@Autowired
private OSSClient ossClient;
/**
* 签名生成
* @return
*/
@Override
public OssPolicyResult policy() {
OssPolicyResult ossPolicyResult = new OssPolicyResult();
// 存储目录
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
String dir = ALIYUN_OSS_DIR_PREFIX + sdf.format(new Date());
// 签名有效期
long expireEndTime = System.currentTimeMillis() + ALIYUN_OSS_EXPIRE * 1000;
Date expiration = new Date(expireEndTime);
// 文件大小
int maxSize = ALIYUN_OSS_MAX_SIZE * 1024 * 1024;
// 回调
OssCallbackParam ossCallbackParam = new OssCallbackParam();
ossCallbackParam.setCallbackUrl(ALIYUN_OSS_CALLBACK);
ossCallbackParam.setCallbackBody("filename=${object}&size=${size}&mimeType=${mimeType}&height=${imageInfo.height}&width=${imageInfo.width}");
ossCallbackParam.setCallbackBodyType("application/x-www-form-urlencoded");
// 提交节点
String action = "http://"+ ALIYUN_OSS_ENDPOINT;
try {
PolicyConditions policyConditions = new PolicyConditions();
policyConditions.addConditionItem(PolicyConditions.COND_CONTENT_LENGTH_RANGE,0,maxSize);
policyConditions.addConditionItem(MatchMode.StartWith,PolicyConditions.COND_KEY,dir);
String postPolicy = ossClient.generatePostPolicy(expiration,policyConditions);
byte[] binaryData = new byte[0];
binaryData = postPolicy.getBytes("utf-8");
String policy = BinaryUtil.toBase64String(binaryData);
String signature = ossClient.calculatePostSignature(postPolicy);
String callbackData = BinaryUtil.toBase64String(JSONUtil.parse(ossCallbackParam).toString().getBytes("utf-8"));
// 返回结果
ossPolicyResult.setAccessKeyId(ossClient.getCredentialsProvider().getCredentials().getAccessKeyId());
ossPolicyResult.setPolicy(policy);
ossPolicyResult.setSignature(signature);
ossPolicyResult.setDir(dir);
ossPolicyResult.setCallback(callbackData);
ossPolicyResult.setHost(action);
} catch (Exception e) {
LOGGER.error("签名生成失败",e);
}
return ossPolicyResult;
}
@Override
public OssCallbackResult callback(HttpServletRequest request) {
OssCallbackResult ossCallbackResult = new OssCallbackResult();
String filename = request.getParameter("filename");
filename ="http://".concat(ALIYUN_OSS_BUCKET_NAME).concat(".").concat(ALIYUN_OSS_ENDPOINT).concat("/").concat(filename);
ossCallbackResult.setFilename(filename);
ossCallbackResult.setSize(request.getParameter("size"));
ossCallbackResult.setMimeType(request.getParameter("mimeType"));
ossCallbackResult.setWidth(request.getParameter("width"));
ossCallbackResult.setHeight(request.getParameter("height"));
return ossCallbackResult;
}
}
九、添加OssController定义接口
package top.xtslife.practice.controller;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import top.xtslife.practice.Service.OssService;
import top.xtslife.practice.common.CommonResult;
import top.xtslife.practice.component.OssCallbackResult;
import top.xtslife.practice.component.OssPolicyResult;
import javax.servlet.http.HttpServletRequest;
/**
* @Author 小涛
* @Create 2019-08-16 21:46
*/
@RestController
@Api(tags = "OssController",description = "Oss管理")
@RequestMapping("/aliyun/oss")
public class OssController {
@Autowired
private OssService ossServiceImpl;
@ApiOperation("oss上传签名生成")
@GetMapping("/policy")
public CommonResult<OssPolicyResult> policy(){
OssPolicyResult ossPolicyResult = ossServiceImpl.policy();
return CommonResult.success(ossPolicyResult);
}
@ApiOperation("oss上传成功回调")
@PostMapping("callback")
public CommonResult<OssCallbackResult> callback(HttpServletRequest request){
OssCallbackResult ossCallbackResult = ossServiceImpl.callback(request);
return CommonResult.success(ossCallbackResult);
}
}