Ruby storing remote files in Zip using RubyZip

Question

I have a model called Image. Images have files attached using Dragonfly that are stored in S3.

I have a requirement that I need to zip up all images.

I'm using:

 Zip::ZipFile.open(tmp_zip, Zip::ZipFile::CREATE) do |zipfile|
   zipfile.add("image.jpg", image_path)      
 end

The problem I'm running into is that this works if image_path is local. When you need to call to S3 for the file, image_path is a remote path, such as http://example.s3.amazonaws.com/foo/image.jpg, and I don't think that there is a RubyZip method that handles that.

I'm debating on writing something that creates a temp file from the remote path, adds that temp file to the zip, then deletes the temp file.

But before I do that, does anyone know if RubyZip or some other zip library handles zipping up remote files? Or is there a better/easier method?

Thanks!

I ended up going with the custom method that downloads the file via net/http, saves a temp file, puts the temp file in the zip, and then disposes of the temp file. — Corey

Awlad Liton Awlad Liton · Accepted Answer · 2016-04-15T10:38:13

I have faced same issue and I have found a solution. So I am sharing it, might help someone.

You can add any remote file to zip without saving it in a temp file, then read it from temp file and finally deleting temp file.

create zip and add remote files in it

Zip::OutputStream.open(tmp_zip) do |zos|
   zos.put_next_entry("image.jpg")
   zos.print(URI.parse(image_url).read)    
 end

If you want to add any local files inside above temp_zip then you can open it again:

open this zip again and add any local files you want

zipfile = Zip::File.open(tmp_zip)
zipfile.add("report.pdf", my_pdf_path)
zipfile.close

Ruby storing remote files in Zip using RubyZip

2 Answers

create zip and add remote files in it

open this zip again and add any local files you want