#19036: Big base64-encoded files uploading
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Reporter: anthony@… | Owner: nobody
Type: Bug | Status: new
Component: File uploads/storage | Version: master
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Easy pickings: 0 | UI/UX: 0
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I'm trying to upload image file using ajax & browser
FileReader.readAsDataURL API. In most cases it fails with
`MultiPartParserError: Could not decode base64 data: Error('Incorrect
padding',).`
When django cut of header from 'multipart/form-data' part with encoded
file data, it does not check length of the remaining data and pass it to
decoder. Length of passed data is `(FileUploadHandler chunk size) -
(removed header length)` which is not divides by 4 in most cases.
It is reproduced by testcase I attached. It is based on standard Django
test_base64_upload test but reads 512Kb from /dev/urandom instead of short
string.
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Ticket URL: <https://code.djangoproject.com/ticket/19036>
Django <https://code.djangoproject.com/>
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