Linux – Unzip from stdin to stdout – funzip, python

bashcompressionlinuxpipepython

The goal is to read a zip file from stdin and uncompress to stdout.

Funzip works and is the solution I am looking for, the zip contains a single file, unfortunately funzip fails when the compressed file size is around 1GB or greater: 

funzip error: invalid compressed data--length error

Update: I have discovered the above error may not indicate an actual error. Comparing two uncompressed files, one unzipped traditionally and the other through a pipe using funzip (with the above error written to stderr) the files are identical. I'd like to keep this open, so this can be confirmed or reported.

A related solution using python:
Unzipping files that are flying in through a pipe

However this output is directed to a file.

Best Answer

Repost of my answer:

BusyBox's unzip can take stdin and extract all the files to stdout. For example, when you use wget as stdin,

wget -qO- http://downloads.wordpress.org/plugin/akismet.2.5.3.zip | busybox unzip -p -

-p to extract files to pipe. The dash after is to use stdin as input.

You also can, (just like previous answer)

cat file.zip | busybox unzip -p -

But that's just redundant of unzip -p file.zip.

If your distro uses BusyBox by default (e.g. Alpine), just run unzip -p -.

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