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前言

最近公司的私有 Oss 服务满了，且 Oss 地址需要设置权限，只有当前系统的登录用户才能访问 Oss 下载地址。一开始想着用 Nginx 做个转发来着，Nginx 每当检测当前请求包含特定的 Oss 地址就转发到我们的统一鉴权接口上去，但是紧接着又细想了一下，转发后的地址被恶意分享出去了，不也还是存在文件泄露的风险吗？于是又去翻阅了一下阿里云的 Oss 权限相关的文档。借此整合一些常用的方法，机械代码自留也是分享给大家

完整代码

里面整合了文件的增、删、修改权限、获取签名等方法，各位替换成各自的 ak、sk 即可

package com.queyi.qykgjx.util;import com.aliyun.oss.*;
import com.aliyun.oss.internal.OSSHeaders;
import com.aliyun.oss.model.*;
import org.apache.http.ParseException;
import org.springframework.web.multipart.MultipartFile;import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;public class OssUtilCsdn {private final static String ENDPOINT = "端点";private final static String ACCESS_KEY_ID = "ak";private final static String ACCESS_KEY_SECRET = "sk";private final static String BUCKET_NAME = "容器名";private static String HTTPS_URL_PREFIX = ENDPOINT.replace("https://", ("https://" + BUCKET_NAME + "."));private final static String FILE_CATALOG = "文件上传目录";public static void cpoy(String sourceKey, String dstKey, Boolean deleteSourceFile) {OSS ossClient = new OSSClientBuilder().build(ENDPOINT, ACCESS_KEY_ID, ACCESS_KEY_SECRET);CopyObjectRequest copyObjectRequest = new CopyObjectRequest(BUCKET_NAME, sourceKey, BUCKET_NAME, dstKey);ObjectMetadata objectMetadata = new ObjectMetadata();objectMetadata.setObjectAcl(CannedAccessControlList.Private);copyObjectRequest.setNewObjectMetadata(objectMetadata);ossClient.copyObject(copyObjectRequest);//删除被拷贝的文件if (deleteSourceFile) ossClient.deleteObject(BUCKET_NAME, sourceKey);ossClient.shutdown();}public static void setAcl(String bucketName, String url, Boolean privateAcl) {ClientBuilderConfiguration config = new ClientBuilderConfiguration();config.setSupportCname(false);OSS ossClient = new OSSClientBuilder().build(ENDPOINT, ACCESS_KEY_ID, ACCESS_KEY_SECRET);try {ossClient.setObjectAcl(bucketName == null ? BUCKET_NAME : bucketName,getObjectNameByFullUrl(url),privateAcl ? CannedAccessControlList.Private : CannedAccessControlList.PublicRead);} catch (OSSException oe) {oe.printStackTrace();} catch (ClientException ce) {ce.printStackTrace();} finally {if (ossClient != null) {ossClient.shutdown();}}}/*** @param bucketName 容器名称* @param file       待上传的文件* @param acl        文件权限*/public static String upload(String bucketName, MultipartFile file, String acl) throws IOException {OSS ossClient = new OSSClientBuilder().build(ENDPOINT, ACCESS_KEY_ID, ACCESS_KEY_SECRET);if (null == bucketName || bucketName.length() > 0) bucketName = BUCKET_NAME;InputStream inputStream = file.getInputStream();String filename = file.getOriginalFilename();String[] split = filename.split("\\.");filename = new Date().getTime() + "." + split[split.length - 1];String s = FILE_CATALOG + "/" + filename.replaceAll("/", "");PutObjectRequest o = new PutObjectRequest(bucketName, s, inputStream);ObjectMetadata metadata = new ObjectMetadata();metadata.setHeader(OSSHeaders.OSS_STORAGE_CLASS, StorageClass.Standard.toString());if ("private".equals(acl)) metadata.setObjectAcl(CannedAccessControlList.Private);else if ("public".equals(acl)) metadata.setObjectAcl(CannedAccessControlList.PublicRead);else metadata.setObjectAcl(CannedAccessControlList.Private);o.setMetadata(metadata);ossClient.putObject(o);ossClient.shutdown();inputStream.close();return HTTPS_URL_PREFIX + "/" + s;}/*** 获取签名*/public static String getSign(String key, int timeOut) throws ParseException {ClientBuilderConfiguration config = new ClientBuilderConfiguration();config.setSupportCname(false);Date expiration = new Date(new Date().getTime() + timeOut * 1000L);OSS ossClient = new OSSClientBuilder().build(ENDPOINT, ACCESS_KEY_ID, ACCESS_KEY_SECRET, config);URL url = ossClient.generatePresignedUrl(BUCKET_NAME, key, expiration);return url.toString().split("\\?")[1];}public static String getAclPath(String url, int timeOut) throws ParseException {ClientBuilderConfiguration config = new ClientBuilderConfiguration();config.setSupportCname(false);Date expiration = new Date(new Date().getTime() + timeOut * 1000L);OSS ossClient = new OSSClientBuilder().build(ENDPOINT, ACCESS_KEY_ID, ACCESS_KEY_SECRET, config);return ossClient.generatePresignedUrl(BUCKET_NAME, getObjectNameByFullUrl(url), expiration).toString();}public static String getObjectNameByFullUrl(String url) {if (!url.contains(FILE_CATALOG)) return null;/*** a/a.pdf*/return FILE_CATALOG + url.split(FILE_CATALOG)[1];}/*** 删*/public static List<String> deleteObject(String bucketName, List<String> keys) {ArrayList<String> newKeys = new ArrayList<>();keys.stream().forEach(key -> {newKeys.add(key.replace(HTTPS_URL_PREFIX + "/", ""));});OSS ossClient = new OSSClientBuilder().build(ENDPOINT, ACCESS_KEY_ID, ACCESS_KEY_SECRET);DeleteObjectsResult deleteObjectsResult = ossClient.deleteObjects(new DeleteObjectsRequest(bucketName == null ? BUCKET_NAME : bucketName).withKeys(newKeys));List<String> deletedObjects = deleteObjectsResult.getDeletedObjects();ossClient.shutdown();return deletedObjects;}}

整合接口

 @PostMapping("csdnUpFile")public Result csdnUpFile(@RequestParam("file") MultipartFile multipartFile, @RequestParam("acl") String perm) throws IOException {HashMap<String, String> map = new HashMap<>();map.put("fileName", multipartFile.getOriginalFilename());map.put("fileUrl", OssUtil.zzhUpload(null, multipartFile, perm));return Result.success(map);}@PostMapping("csdnSetAcl")public Result csdnSetAcl(@RequestParam("filePath") String filePath) throws IOException {OssUtil.setAcl(null, filePath, true);return Result.success("ok");}@PostMapping("csdnGetAclPath")public Result csdnGetAclPath(@RequestParam("filePath") String url) throws IOException {return Result.success(OssUtil.getAclPath(url, 60));}@PostMapping("csdnDeleteFile")public Result csdnDeleteDile(@RequestBody List<String> urls) throws IOException {return Result.success(OssUtil.deleteObject(null, urls));}

测试

上传文件设置成公共读

文件正常访问

将全路径地址作为参数掉修改权限接口

再次访问此地址提示无权限

加上签名访问文件可以正常访问

其他方法不做一一测试了，删除文件也是传上传接口返回的全路径即可，可直接删除文件。其他操作看下阿里的Oss 文档即可，机械代码不做过多描述