CODEWITHSUNDEEP
pythoniozip
vpap
vpap

Reputation: 1547

Python convert zip file to bytes stream

I have a zip file that when I open it locally it looks great. I want to convert it to a bytes stream buffer and then return it as HttpResponse(buffer) using django. The code is,

studies_zip = zipfile.ZipFile('./studies.zip', 'r')
buffer = io.BytesIO()
bytes = [zipfile.Path(studies_zip, at=file.filename).read_bytes() 
             for file in studies_zip.infolist()]

buffer = io.BytesIO()
buffer_writer = io.BufferedWriter(buffer)
[buffer_writer.write(b) for b in bytes]
buffer.seek(0)

response = HttpResponse(buffer)
response['Content-Type'] = 'application/zip'
response['Content-Disposition'] = 'attachment;filename=studies.zip'

At the front-end/UI I get this,

enter image description here

that looks fine i.e. the displayed size of 34.9MB is a little bit less than the actual 36.6MB. Also, when I try to open the file either on the spot or after saving it locally, I get

enter image description here

What's wrong?

Upvotes: 0

Views: 2323

Answers (1)

mhawke
mhawke

Reputation: 87074

You are sending the contents of the compressed files, omitting the metadata contained in the zip archive.

There is no reason to open the file as a zip file as no changes are made to the contents, so just open the file in byes mode and send it. I haven't tested this, but try this:

with open('./studies.zip', 'rb') as f:
    response = HttpResponse(f)
    response['Content-Type'] = 'application/zip'
    response['Content-Disposition'] = 'attachment;filename=studies.zip'

Upvotes: 2

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