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IMAP: if selecting the mailbox fails, then detect the server's mailbox hierarchy

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delimiter, replace slashes in the mailbox name with the delimiter and try again.
This commit is contained in:
Nikolaus Schulz 2007-11-07 16:31:49 +00:00
parent 1e5cb090e7
commit fbb00e08f4
1 changed files with 48 additions and 6 deletions
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54
archivemail.py
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@ -1349,12 +1349,27 @@ def _archive_imap(mailbox_name, final_archive_name):
result, response = imap_srv.login(imap_username, imap_password)
vprint("selecting imap folder '%s'" % imap_folder)
if options.dry_run or options.copy_old_mail:
result, response = imap_srv.select(imap_folder, readonly=True)
else:
result, response = imap_srv.select(imap_folder)
if result != 'OK': unexpected_error("cannot select imap folder; "
"server says '%s'" % response[0])
# Open mailbox read-only?
roflag = options.dry_run or options.copy_old_mail
# First try the given folder name, if this doesn't work, try to fix it.
result, response = imap_srv.select(imap_folder, roflag)
if result != 'OK':
errmsg = "cannot select imap folder; server says '%s'" % response[0]
if not os.path.sep in imap_folder:
unexpected_error(errmsg)
vprint("Selecting '%s' failed; server says: '%s'. Trying to "
"fix mailbox path..." % (imap_folder, response[0]))
delim = get_delim(imap_srv)
if not delim:
unexpected_error(errmsg)
imap_folder = imap_folder.replace(os.path.sep, delim)
vprint("Selecting '%s'" % imap_folder)
result, response = imap_srv.select(imap_folder, roflag)
if result == 'OK':
vprint("successfully selected imap folder %s" % imap_folder)
else:
unexpected_error("cannot select imap folder; "
"server says '%s'" % response[0])
# response is e.g. ['1016'] for 1016 messages in folder
total_msg_count = int(response[0])
vprint("folder has %d message(s)" % total_msg_count)
@ -1532,6 +1547,33 @@ def parse_imap_url(url):
unexpected_error("Invalid IMAP connection string")
return username, password, server, folder
def get_delim(imap_server):
"""Return the IMAP server's hierarchy delimiter. Assumes there is only one."""
# This function will break if the LIST reply doesn't meet our expectations.
# Imaplib and IMAP itself are both little beasts, and I do not know how
# fragile this function will be in the wild.
try:
result, response = imap_server.list(pattern='""')
except ValueError:
# Stolen from offlineimap:
# Some buggy IMAP servers do not respond well to LIST "" ""
# Work around them.
result, response = imap_server.list(pattern='%')
if result != 'OK': unexpected_error("Error listing directory; "
"server says '%s'" % response[0])
# Response should be a list of strings like
# '(\\Noselect \\HasChildren) "." "boxname"'
# We parse only the first list item and just grab the delimiter.
try:
i = response[0].index(')')
except (ValueError, AttributeError):
unexpected_error("get_delim(): cannot parse %s" % str(response[0]))
delim = response[0][i+2:i+5].strip('"')
vprint("Found mailbox hierarchy delimiter: '%s'" % delim)
if delim == "NIL":
return None
return delim
def get_filename(msg):
"""If the given rfc822.Message can be identified with a file (no mbox),
return the filename, otherwise raise AttributeError."""