问题
A few years ago I uploaded some photos to S3. When I try to retrieve them today, the files seem to be corrupted, as I am unable to open them in the browser or with a photo editor. Looking at the file properties, it seems the files have been compressed, as there is a x-amz-meta-compression-algorithm key with the value zlib and a x-amz-meta-compression-original-size with a value of 53890. However, the size of the file on S3 is 53761. I did not compress the files before uploading them. How can I uncompress these files?
回答1:
Did you download the file and determine its type using file command?
If it is indeed zlib compressed or if file command says data, try the accepted answer in this link: https://unix.stackexchange.com/questions/22834/how-to-uncompress-zlib-data-in-unix
printf "\x1f\x8b\x08\x00\x00\x00\x00\x00" |cat - zlib.raw |gzip -dc > myfile
来源：https://stackoverflow.com/questions/36209854/amazon-s3-compressing-files