0040-00000025

Problem description

The watermark image specified in the image processing request does not exist in the bucket.

Causes

OSS cannot apply a watermark using an image that is not in the bucket. The watermark image name in the x-oss-process parameter is Base64-encoded. If the decoded filename does not match any object in the bucket, the request fails.

Examples

In the following request, the oss-example bucket contains only panda.jpg and example_image.

GET /example_image?x-oss-process=image/watermark,image_cGFuZGEucG5n HTTP/1.1
Host: oss-example.oss-cn-hangzhou.aliyuncs.com
Date: Fri, 03 Feb 2023 03:41:49 GMT
Content-Type: application/xml

The parameter value cGFuZGEucG5n is the Base64 encoding of panda.png. Because panda.png does not exist in the bucket, OSS returns an error.

To decode a Base64-encoded watermark name, run:

echo "cGFuZGEucG5n" | base64 --decode
# Output: panda.png

Solutions

Upload the missing watermark image to the bucket, or update the request to reference an image that already exists. The following example uses panda.jpg, which exists in the bucket:

GET /example_image?x-oss-process=image/watermark,image_cGFuZGEuanBn HTTP/1.1
Host: oss-example.oss-cn-hangzhou.aliyuncs.com
Date: Fri, 03 Feb 2023 03:41:49 GMT
Content-Type: application/xml

Here, cGFuZGEuanBn decodes to panda.jpg. The request succeeds and returns the watermarked image.

Always use existing watermark images for processing.

References

Add watermarks