Comment 1 for bug 1483705

Reviewed: https://review.openstack.org/211626
Committed: https://git.openstack.org/cgit/openstack/swift/commit/?id=7064706b2721c36c5181267f58704b9344ad4ac0
Submitter: Jenkins
Branch: master

commit 7064706b2721c36c5181267f58704b9344ad4ac0
Author: Samuel Merritt <email address hidden>
Date: Tue Aug 11 10:17:20 2015 -0500

    Fix 500 in versioned writes with bad Destination

    When this code lived in the proxy, it was protected by an "except
    HTTPException" clause in proxy.Application.handle_request(). When it
    moved to middleware, it lost that, and then things like
    constraints.check_name_format that raised HTTPException would cause
    500s. The HTTPException would make it all the way out to catch_errors
    and get translated to a 500.

    This commit just wraps a couple try/excepts around the bits in
    versioned writes that can raise HTTPException. I tried to make it use
    wsgify so I could get that for free, but that wound up being a real
    pain because env/start_response are plumbed through pretty much the
    whole versioned-writes middleware.

    Closes-Bug: 1483705

    Change-Id: Ife165bf709e64f313ed07c779b21914045e51f25