阿里oss
来源：互联网 发布：怎么自学java 编辑：程序博客网 时间：2024/04/30 02:05
最近两天没啥任务，把上个月调研的阿里oss的api封装了下,其中最重要的是文件上传，下面用阿里的一个图来表示下，好处自然是不言而喻，具体请看阿里oss官方文档
- 从流程上，少了一步转发。
- 从架构上来说，原来的上传都统一走网站服务器，上传量过大时，瓶颈在网站服务器，可能需要扩容网站服务器。采用表单上传后，上传都是直接从客户端发送到OSS。上传量过大时，压力都在OSS上，由OSS来保障服务质量。
话不多说直接上干货:
controller:
/** * 得到秘钥 (管理员目录flag=1,用户目录flag=2) * @param flag * @param request * @param response * @throws Exception */@RequestMapping(value = "/ossgetKey")@SystemControllerLog(description = "得到oss秘钥")public void getKey(int flag,HttpServletRequest request, HttpServletResponse response) throws Exception { aliUtil.getKey(flag,request,response);}/** * oss回调此方法，然后回应客户端 * @param request * @param response * @throws Exception */@RequestMapping(value = "/osscallBack")@SystemControllerLog(description = "oss回调")public void callBack(HttpServletRequest request, HttpServletResponse response) throws Exception { String c_length=request.getHeader("content-length"); int c_i=Integer.parseInt(c_length); //解析阿里回调服务器的接口数据 String ossCallbackBody = aliUtil.GetPostBody(request.getInputStream(), c_i); //验证是否是阿里发起的回调 boolean ret = aliUtil.VerifyOSSCallbackRequest(request, ossCallbackBody); if (ret) { //保存oss返回来的文件信息 //ossCallbackBody={"bucket":"k12b","object":"userdir/mmm.jpg","mimeType":"image/png","size":75540} int size=0; String bucket="",object="",mimeType="",uuid=""; JSONObject jsonObject = JsonUtil.getJSONObject(ossCallbackBody); try { bucket = jsonObject.getString("bucket"); // k12b object = jsonObject.getString("object"); // userdir/mmm.jpg mimeType = jsonObject.getString("mimeType"); // image/png size = jsonObject.getInt("size"); // 75540 } catch (JSONException e) { e.printStackTrace(); } //保存文件信息到数据库 Files files = new Files(); //创建时间 files.setCreateTime(new Date()); //文件大小 files.setResSize(size); //获取纯文件名 files.setName(object); //获取文件后缀 files.setSuffix(mimeType); //生成随机文件名 files.setUuid(uuid); //生成路径 files.setPath(""); this.filesService.insertSelective(files); //返回给OSS aliUtil.response(request, response, "{\"Status\":\"OK\"}", HttpServletResponse.SC_OK); } else { aliUtil.response(request, response, "{\"Status\":\"verdify not ok\"}", HttpServletResponse.SC_BAD_REQUEST); }}/** * 下载阿里文件 * @param key (形如 "admin/2016-05-03/40e07ea8-0cf2-436c-a3c6-bfd55aedf65c.mp4" ) * @param request * @param response * @throws Exception */@RequestMapping(value = "/ossdownload")@SystemControllerLog(description = "下载oss文件")public void download(String key,HttpServletRequest request, HttpServletResponse response) throws Exception { aliUtil.download(key,request,response);}/** * 在线播放阿里文件 * @param key (形如 "admin/2016-05-03/40e07ea8-0cf2-436c-a3c6-bfd55aedf65c.mp4" ) * @param request * @param response * @throws Exception */@RequestMapping(value = "/ossplayOnline")@SystemControllerLog(description = "在线播放oss文件")public void playOnline(String key,HttpServletRequest request, HttpServletResponse response) throws Exception { aliUtil.playOnline(key,request,response);}/** * 批量删除阿里文件 * @param keys * @param request * @return * @throws Exception */@RequestMapping(value = "/del", method = RequestMethod.DELETE)public JsonResult deleteBooks(@RequestParam(name = "keys") List<String> keys, HttpServletRequest request) throws Exception{ aliUtil.del(keys); return new JsonResult(true, ("delete success"));}aliUtil:
public class aliUtil {private static final String endpoint = ""; private static final String accessId = "";private static final String accessKey = "";private static final String bucket = ""; private static final String host = "http://" + bucket + "." + endpoint;private static final String callbackUrl = ""; //回调接口/** * 初始化 OSSClient * @return */private static OSSClient init(){ return new OSSClient(endpoint, accessId, accessKey);}/** * 得到秘钥用于文件上传 * @param flag (管理员目录flag=1,用户目录flag=2) * @param request * @param response * @throws Exception */public static void getKey(int flag,HttpServletRequest request, HttpServletResponse response) throws Exception{ String dir = ""; //上传目录；管理员资源目录为admin,用户目录为user OSSClient client = init(); try { long expireTime = 30*100;//过期时间3000秒,部署项目后需要设为30秒 long expireEndTime = System.currentTimeMillis() + expireTime * 1000; java.sql.Date expiration = new java.sql.Date(expireEndTime); PolicyConditions policyConds = new PolicyConditions(); policyConds.addConditionItem(PolicyConditions.COND_CONTENT_LENGTH_RANGE, 0, 1048576000);//最大文件1G 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); //生成随机文件名 String uuid = UUID.randomUUID().toString(); //生成回调 String callbackBody = ""; String callbackBodyType = "application/json"; String callback_param="{" + " \"callbackUrl\":\""+callbackUrl+"\"," + " \"callbackBody\":\"{\\\"bucket\\\":${bucket},\\\"object\\\":${object},\\\"mimeType\\\":${mimeType},\\\"size\\\":${size}}\"," + " \"callbackBodyType\":\""+callbackBodyType+"\"" + " }"; byte[] binaryDatas = callback_param.getBytes("utf-8"); byte[] encodeBase64 = org.apache.commons.codec.binary.Base64.encodeBase64(binaryDatas); String callback=new String(encodeBase64); String strDate=new SimpleDateFormat("yyyy-MM-dd").format(new Date()); if(flag==1){ dir="admin/"+strDate; }else{ dir="user/"+strDate; } Map<String, String> 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)); respMap.put("filename", uuid); respMap.put("callback", callback); net.sf.json.JSONObject ja1 = net.sf.json.JSONObject.fromObject(respMap); System.out.println(ja1.toString()); response.setHeader("Access-Control-Allow-Origin", "*"); response.setHeader("Access-Control-Allow-Methods", "GET, POST"); response(request, response, ja1.toString()); } catch (Exception e) { e.getMessage(); throw new RuntimeException("秘钥生成失败!"); }finally { client.shutdown(); }}/** * 私有工具方法 * @param request * @param response * @param results * @throws IOException */private static void response(HttpServletRequest request, HttpServletResponse response, String results) throws IOException { String callbackFunName = request.getParameter("callback"); if (callbackFunName==null || callbackFunName.equalsIgnoreCase("")) response.getWriter().println(results); else{ response.getWriter().println(results); response.getWriter().println(callbackFunName + "( "+results+" )"); } response.setStatus(HttpServletResponse.SC_OK); response.flushBuffer();}/** * 发送get请求 * @param url * @return */@SuppressWarnings({ "finally" })public static String executeGet(String url) { BufferedReader in = null; String content = null; try { // 定义HttpClient @SuppressWarnings("resource") DefaultHttpClient client = new DefaultHttpClient(); // 实例化HTTP方法 HttpGet request = new HttpGet(); request.setURI(new URI(url)); HttpResponse response = client.execute(request); in = new BufferedReader(new InputStreamReader(response.getEntity().getContent())); StringBuffer sb = new StringBuffer(""); String line = ""; String NL = System.getProperty("line.separator"); while ((line = in.readLine()) != null) { sb.append(line + NL); } in.close(); content = sb.toString(); } catch (Exception e) { } finally { if (in != null) { try { in.close();// 最后要关闭BufferedReader } catch (Exception e) { e.printStackTrace(); } } return content; }}/** * 验证回调是否是阿里发送的 * @param request * @param ossCallbackBody * @return * @throws NumberFormatException * @throws IOException */public static boolean VerifyOSSCallbackRequest(HttpServletRequest request, String ossCallbackBody) throws NumberFormatException, IOException{ boolean ret = false; String autorizationInput = new String(request.getHeader("Authorization")); String pubKeyInput = request.getHeader("x-oss-pub-key-url"); byte[] authorization = BinaryUtil.fromBase64String(autorizationInput); byte[] pubKey = BinaryUtil.fromBase64String(pubKeyInput); String pubKeyAddr = new String(pubKey); if (!pubKeyAddr.startsWith("http://gosspublic.alicdn.com/") && !pubKeyAddr.startsWith("https://gosspublic.alicdn.com/")) { System.out.println("pub key addr must be oss addrss"); return false; } String retString = executeGet(pubKeyAddr); retString = retString.replace("-----BEGIN PUBLIC KEY-----", ""); retString = retString.replace("-----END PUBLIC KEY-----", ""); String queryString = request.getQueryString(); String uri = request.getRequestURI(); String decodeUri = java.net.URLDecoder.decode(uri, "UTF-8"); String authStr = decodeUri; if (queryString != null && !queryString.equals("")) { authStr += "?" + queryString; } authStr += "\n" + ossCallbackBody; ret = doCheck(authStr, authorization, retString); return ret;}/** * 解析阿里回调服务器的接口数据 * @param is * @param contentLen * @return */public static String GetPostBody(InputStream is, int contentLen) { if (contentLen > 0) { int readLen = 0; int readLengthThisTime = 0; byte[] message = new byte[contentLen]; try { while (readLen != contentLen) { readLengthThisTime = is.read(message, readLen, contentLen - readLen); if (readLengthThisTime == -1) {// Should not happen. break; } readLen += readLengthThisTime; } return new String(message); } catch (IOException e) { e.printStackTrace(); throw new RuntimeException("解析阿里数据出错!"); } } return "";}public static boolean doCheck(String content, byte[] sign, String publicKey) { try { KeyFactory keyFactory = KeyFactory.getInstance("RSA"); byte[] encodedKey = BinaryUtil.fromBase64String(publicKey); PublicKey pubKey = keyFactory.generatePublic(new X509EncodedKeySpec(encodedKey)); java.security.Signature signature = java.security.Signature.getInstance("MD5withRSA"); signature.initVerify(pubKey); signature.update(content.getBytes()); boolean bverify = signature.verify(sign); return bverify; } catch (Exception e) { e.printStackTrace(); } return false;}public static void response(HttpServletRequest request, HttpServletResponse response, String results, int status) throws IOException { String callbackFunName = request.getParameter("callback"); response.addHeader("Content-Length", String.valueOf(results.length())); if (callbackFunName == null || callbackFunName.equalsIgnoreCase("")) response.getWriter().println(results); else response.getWriter().println(callbackFunName + "( " + results + " )"); response.setStatus(status); response.flushBuffer();}/** * 根据key下载文件 * @param key * @param request * @param response * @return */public static HttpServletResponse download(String key, HttpServletRequest request, HttpServletResponse response) { //初始化OSSClient OSSClient client = init(); // 获取Object，返回结果为OSSObject对象 OSSObject object = client.getObject(bucket, key); // 获取Object Metadata ObjectMetadata metadata = object.getObjectMetadata(); // 获取Object的输入流 InputStream fis = object.getObjectContent(); // 取得文件名。 String fileName = key; try { if (request.getHeader("User-Agent").toLowerCase().indexOf("firefox") > 0){ fileName = new String(fileName.getBytes("UTF-8"), "ISO8859-1");//firefox浏览器 }else { if (request.getHeader("User-Agent").toUpperCase().indexOf("MSIE") > 0){ fileName = URLEncoder.encode(fileName, "UTF-8");//IE浏览器 } } response.setContentType("text/plain"); response.setHeader("Location",fileName); response.reset(); response.setHeader("Cache-Control", "max-age=0" ); response.setHeader("Content-Disposition", "attachment; filename=" + fileName); BufferedInputStream bis = null; BufferedOutputStream bos = null; OutputStream fos = null; bis = new BufferedInputStream(fis); fos = response.getOutputStream(); bos = new BufferedOutputStream(fos); int bytesRead = 0; byte[] buffer = new byte[5 * 1024]; while ((bytesRead = bis.read(buffer)) != -1) { bos.write(buffer, 0, bytesRead);// 将文件发送到客户端 } bos.close(); bis.close(); fos.close(); fis.close(); } catch (IOException e) { e.printStackTrace(); }finally { client.shutdown(); } return response;}/** * 根据key在线播放资源 * @param key * @param request * @param response * @return */public static HttpServletResponse playOnline(String key, HttpServletRequest request, HttpServletResponse response) { //初始化 OSSClient OSSClient client = init(); // 获取Object，返回结果为OSSObject对象 OSSObject object = client.getObject(bucket, key); // 获取Object的输入流 InputStream fis = object.getObjectContent(); try { BufferedInputStream bis = null; BufferedOutputStream bos = null; OutputStream fos = null; bis = new BufferedInputStream(fis); fos = response.getOutputStream(); bos = new BufferedOutputStream(fos); int bytesRead = 0; byte[] buffer = new byte[5 * 1024]; while ((bytesRead = bis.read(buffer)) != -1) { bos.write(buffer, 0, bytesRead);// 将文件发送到客户端 } bos.close(); bis.close(); fos.close(); fis.close(); } catch (IOException e) { e.printStackTrace(); }finally { client.shutdown(); } return response;}/** * 批量删除文件 * * @param keys */public static void del(List<String> keys) throws Exception { //初始化 OSSClient OSSClient client = init(); try { System.out.println("\nDeleting all objects:"); DeleteObjectsResult deleteObjectsResult = client.deleteObjects( new DeleteObjectsRequest(bucket).withKeys(keys)); List<String> deletedObjects = deleteObjectsResult.getDeletedObjects(); for (String object : deletedObjects) { System.out.println("\t" + object); } System.out.println(); } catch (OSSException oe) { throw new RuntimeException("Caught an OSSException, which means your request made it to OSS, " + "but was rejected with an error response for some reason." + "**Error Message: " + oe.getErrorCode() + "**Error Code:" + oe.getErrorCode() + "**Request ID:" + oe.getRequestId() + "**Host ID:" + oe.getHostId()); } catch (ClientException ce) { throw new RuntimeException("Caught an ClientException, which means the client encountered " + "a serious internal problem while trying to communicate with OSS, " + "such as not being able to access the network. " + "**Error Message: " + ce.getMessage()); } finally { client.shutdown(); }} 1 0
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