Ali cloud object storage oss private barrels to generate links

Business Scenario:

1, you need to download files from other platforms and upload them to oss object storage.

2, the app side needs thumbnail display of small images, including video clips.

3, secure access and memory regulation, etc.

4, chat platform conversion, etc.

Object storage helps us store files, data, more secure and faster.

Alibaba Cloud OSS address:

We use link conversion through private bucket encryption to generate valid links based on time.

/*** Get the url address of the signed file by uploading** @param ossClient* @param key* @return*/public static String getFileUrl(OSS ossClient, String key, String bucketName) throws ParseException {Date date = new Date();Calendar cal = Calendar.getInstance();cal.setTime(date);//add a yearcal.add(Calendar.YEAR, 1);GeneratePresignedUrlRequest generatePresignedUrlRequest;generatePresignedUrlRequest = new GeneratePresignedUrlRequest(bucketName, key);generatePresignedUrlRequest.setExpiration(cal.getTime());URL url = ossClient.generatePresignedUrl(generatePresignedUrlRequest);return url.toString();}

Image thumbnails and video thumbnails

GeneratePresignedUrlRequest generatePresignedUrlRequest;generatePresignedUrlRequest = new GeneratePresignedUrlRequest(bucketName, key);​​​​​​​generatePresignedUrlRequest = new GeneratePresignedUrlRequest(bucketName, key);generatePresignedUrlRequest.setExpiration(cal.getTime());generatePresignedUrlRequest.setProcess(wechatConfig.getLargerImgStyle());URL largerImgUrl = ossClient.generatePresignedUrl(generatePresignedUrlRequest);#big picture thumbnaillarger_img_style: image/resize,l_720#Thumbnailthumbnail_img_style: image/resize,l_198#video thumbnailvideo_style: video/snapshot,t_50000,f_jpg,w_800,h_600// video thumbnail// Create an OSSClient instance.GeneratePresignedUrlRequest req = new GeneratePresignedUrlRequest(bucketName, key, HttpMethod.GET);req.setExpiration(cal.getTime());req.setProcess(wechatConfig.getVideoStyle());URL signedUrl = ossClient.generatePresignedUrl(req);

We can familiarize ourselves with the setProcess settings. Alibaba Cloud's official website also has detailed reference and tutorials.