Not really, you'd need to traverse through every single issue, look for their attachments and issue a download command.
It would probably be easier to simply go on to the Jira server and take a copy of the "attachments" directory under the Jira Home directory, as that's where Jira keeps them all.
Do you know the exact syntax?
I used two ways but no of them are working.
with Issue ID:
curl -D- -u myid:mypasswd -X GET http://LPVWA00A0xxx.wellsfargo.com:8081/secure/attachmentzip/21824.zip
with issue Key:
curl -D- -u myid:mypasswd -X GET http://LPVWA00A0xxx.wellsfargo.com:8081/secure/attachmentzip/BR-69.zip
There is a plugin on Atlassian Marketplace named <a href="https://marketplace.atlassian.com/plugins/pl.craftware.jira.download-attachments-plugin">Download Attachments 4 Jira </a>allows you to download all attachments for JQL query result. I think it'll work fine for your case.
My entry to Atlassian Codegeist 2015 Automate the Atlassian from Command Line has a function that helps you to do just that. Also not only Admins can use this, but even users can use this to download attachments for given JQL.
-- Demo Query against live instance -- Automate JIRA attachments download action > acl --app-name JIRA --browser-name PhantomJS --action get_jira_attachments --userid admin --password 'pongbot' --base-url https://pongbot.atlassian.net --jql 'key=TEST-1'
It's a open source plugin. Hoping you will find it useful. Do vote if you see value to it!
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