Attachment 21960 Details for Bug 50198 – converts broken emails into the expected form

converts broken emails into the expected form

regen.py (text/plain), 1.69 KB, created by Arseny Maslennikov on 2026-07-30 22:54:05 MSK

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Creator: Arseny Maslennikov

Created: 2026-07-30 22:54:05 MSK

Size: 1.69 KB

patch

obsolete

>#!/usr/bin/python3
>import gzip
>import mailbox
>from email.message import EmailMessage
>
>import sys
>
>
>def replace_all_parts(message, by):
>    message.set_payload(by)
>    # Update headers
>    message.replace_header('Content-Type', 'text/plain')
>    message.set_param('charset', 'unknown-8bit', header='Content-Type')
>    message.replace_header('Content-Disposition', 'inline')
>    if 'Content-Transfer-Encoding' in message:
>        del message['Content-Transfer-Encoding']
>
>
>def process(message):
>    if not message.is_multipart():
>        return message
>
>    parts = [part for part in message.walk()]
>    if len(parts) != 3:
>        # Do not risk losing data.
>        print(f'{len(parts)=}', file=sys.stderr)
>        return message
>
>    for part in parts:
>        filename = part.get_filename() or ""
>        c_type = part.get_content_type()
>        if c_type in [
>            "application/x-gzip",
>            "application/gzip",
>        ] and filename.endswith("message.gz"):
>            c_data = part.get_payload(decode=True)
>            if c_data:
>                try:
>                    unc_data = gzip.decompress(c_data)
>                    replace_all_parts(message, unc_data)
>                    break
>                except (OSError, EOFError) as e:
>                    # Skip if decompression fails.
>                    print(e)
>
>    return message
>
>
>if __name__ == '__main__':
>    src_mbox_path = sys.argv[1]
>    dst_mbox_path = sys.argv[2]
>
>    src_mbox = mailbox.mbox(src_mbox_path)
>    dst_mbox = mailbox.mbox(dst_mbox_path)
>    dst_mbox.lock()
>    try:
>        for message in src_mbox:
>            dst_mbox.add(process(message))
>    finally:
>        dst_mbox.unlock()
>        dst_mbox.close()
>        src_mbox.close()

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Attachments on bug 50198: 21960