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    <p>If you know something about the file name, you can use the <a href="https://developers.google.com/google-apps/gmail/imap_extensions" rel="nofollow">X-GM-RAW gmail extensions for imap SEARCH command</a>. These extensions let you use any <a href="http://support.google.com/mail/bin/answer.py?hl=en&amp;answer=7190" rel="nofollow">gmail advanced search</a> query to filter the messages. This way you can restrict the downloads to the matching messages, or exclude some messages you don't want.</p> <pre><code>mail.uid('search', None, 'X-GM-RAW', 'has:attachment filename:pdf in:inbox -label:parsed')) </code></pre> <p>The above search for messages with PDF attachments in INBOX not labeled "parsed".</p> <p>Some pro tips:</p> <ul> <li>label the messages you have already parsed, so you don't need to fetch them again (the -label:parsed filter in the above example)</li> <li>always use the uid version instead of the standard sequential ids (you are already doing this)</li> <li>unfortunately MIME is messy: there are a lot of clients that do weird (or plain wrong) things. You could try to download and parse only the headers, but is it worth the trouble?</li> </ul> <p>[edit]</p> <p>If you label a message after parsing it, you can skip the messages you have parsed already. This should be reasonable enough to monitor your class mailbox.</p> <p>Perhaps you live in a corner of the world where internet bandwidth is more expensive than programmer time; in this case, you can fetch only the headers and look for "Content-disposition" == "attachment; filename=somefilename.ext".</p>
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    1. POGet the Gmail attachment filename without downloading it
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    1. COIt's cool, but the problem is I don't know anything about the attachment. I'm writing a script to "scan" all the gmail inbox of my class' account and tell me whether it's something new, including info about attachments (name and size). Searching for unread messages wouldn't work because the account is used by 30 people.
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    2. COAt least you can skip the messages without attachments and the messages you already parsed; note that you can filter by size also.
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    3. COOf course I can, but there is no problem with skipping the messages I already parsed. The problem is to parse the next 20 messages with 20MB attachments inside, in one minute.
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