Standalone tar.gz downloads are gzipped twice and fail to uncompress with tar on linux

Summary

The standalone downloads from the Crowd website for versions 3.0.1 are gzipped twice.

The Mac version of tar will handle this without issue and a tar -zxf will work as expected. However, on linux tar will fail to unzip and untar the download.

Environment

• CentOS 7 (all linux versions most likely)

Steps to Reproduce

1. Download standalone atlassian-crowd-3.0.1.tar.gz with using Firefox
2. Attempt to extract using tar -zxf

Expected Results

File is extracted to directory.

Actual Results

$ tar -zxf atlassian-crowd-3.0.1.tar.gz
tar: This does not look like a tar archive
tar: Skipping to next header
tar: Exiting with failure status due to previous errors

Note

See Artur Pawelczyk's comment on JSWSERVER-15845.

Workaround

1. Use gunzip and then rename to get tar working:

   $ gunzip atlassian-crowd-3.0.1.tar.gz
   $ mv atlassian-crowd-3.0.1.tar atlassian-crowd-3.0.1.tar.gz
   $ tar -zxf atlassian-crowd-3.0.1.tar.gz
   

2. Use other browser to download the tar file