简介
本文档提供关于基础图片处理的相关的 API 概览以及 SDK 示例代码。
上传时使用图片处理
下面示例展示了如何在上传图片时自动实现图片处理。
图片上传完成后，COS 会存储原始图片和已处理过的图片。后续用户可以通过普通的下载请求获取处理结果。
示例代码
PutObjectRequest request = new PutObjectRequest(bucket, key, srcPath);JObject o = new JObject();// 不返回原图o["is_pic_info"] = 0;JArray rules = new JArray();JObject rule = new JObject();rule["bucket"] = bucket;rule["fileid"] = "desample_photo.jpg";//处理参数，规则参见：https://cloud.tencent.com/document/product/436/44879rule["rule"] = "imageMogr2/thumbnail/400x400";rules.Add(rule);o["rules"] = rules;string ruleString = o.ToString(Formatting.None);request.SetRequestHeader("Pic-Operations", ruleString);//执行请求PutObjectResult result = cosXml.PutObject(request);
说明
对云上数据进行图片处理
下面示例展示了如何在对已存储在 COS 的图片进行相应处理操作，并将结果存入到 COS。
示例代码
JObject o = new JObject();// 不返回原图o["is_pic_info"] = 0;JArray rules = new JArray();JObject rule = new JObject();rule["bucket"] = bucket;rule["fileid"] = "desample_photo.jpg";//处理参数，规则参见：https://cloud.tencent.com/document/product/436/44879rule["rule"] = "imageMogr2/thumbnail/400x400";rules.Add(rule);o["rules"] = rules;string ruleString = o.ToString(Formatting.None);ImageProcessRequest request = new ImageProcessRequest(bucket, key, ruleString);ImageProcessResult result = cosXml.ImageProcess(request);
说明
下载时进行图片处理
下面示例展示了如何在对已存储在 COS 的图片在下载时进行处理操作。
示例代码
GetObjectRequest getObjectRequest = new GetObjectRequest(bucket, key, localDir, localFileName);//处理参数，这里的实例是格式转换为 TPG 图片，规则参见：https://cloud.tencent.com/document/product/436/44879getObjectRequest.SetQueryParameter("imageMogr2/format/tpg", null);
说明
