Fix Python 3 issues in REST code. * Need to use .get not .getheader for HTTP headers (see hg commit fec18298ae02, "Python 3 preparation: HTTP headers handling in roundup_server.py."). * Need to use key not cmp with sort (see hg commit 3fa026621f69, "Python 3 preparation: comparisons."). * dispatch output must be bytes, not str, otherwise writing it to the socket (e.g. in roundup-server) will fail. This fixes issues shown up attempting to access the REST interface with a browser with Python 3 (as opposed to with the Roundup testsuite, which also has known REST issues with Python 3).

from roundup.mailgw import parseContent

def summarygenerator(db, cl, nodeid, newvalues):
    ''' If the message doesn't have a summary, make one for it.
    '''
    if 'summary' in newvalues or 'content' not in newvalues:
        return

    summary, content = parseContent(newvalues['content'], config=db.config)
    newvalues['summary'] = summary


def init(db):
    # fire before changes are made
    db.msg.audit('create', summarygenerator)

# vim: set filetype=python ts=4 sw=4 et si
#SHA: 538f90cb7f4eb63f77eca252b87afbe037d29c48