Fix parsing of IMAP folder names (#4830).

3 files changed, 55 insertions, 42 deletions

diff --git a/changes/bug_4830_handle-unicode-in-folder-names b/changes/bug_4830_handle-unicode-in-folder-names
new file mode 100644
index 0000000..6824745
--- /dev/null
+++ b/changes/bug_4830_handle-unicode-in-folder-names
@@ -0,0 +1,2 @@
+  o Remove conversion of IMAP folder names to string. This makes the IMAP
+    server use twisted's transparent 7bit conversion (#4830).
diff --git a/src/leap/mail/imap/server.py b/src/leap/mail/imap/server.py
index 2739f8c..b9b72d0 100644
--- a/src/leap/mail/imap/server.py
+++ b/src/leap/mail/imap/server.py
@@ -22,6 +22,7 @@ import logging
 import StringIO
 import cStringIO
 import time
+import re
 
 from collections import defaultdict
 from email.parser import Parser
@@ -205,6 +206,8 @@ class SoledadBackedAccount(WithMsgFields, IndexedDB):
         WithMsgFields.LAST_UID_KEY: 0
     }
 
+    INBOX_RE = re.compile(INBOX_NAME, re.IGNORECASE)
+
     def __init__(self, account_name, soledad=None):
         """
         Creates a SoledadAccountIndex that keeps track of the mailboxes
@@ -222,7 +225,7 @@ class SoledadBackedAccount(WithMsgFields, IndexedDB):
         # XXX SHOULD assert too that the name matches the user/uuid with which
         # soledad has been initialized.
 
-        self._account_name = account_name.upper()
+        self._account_name = self._parse_mailbox_name(account_name)
         self._soledad = soledad
 
         self.initialize_db()
@@ -241,19 +244,30 @@ class SoledadBackedAccount(WithMsgFields, IndexedDB):
         """
         return copy.deepcopy(self.EMPTY_MBOX)
 
+    def _parse_mailbox_name(self, name):
+        """
+        :param name: the name of the mailbox
+        :type name: unicode
+
+        :rtype: unicode
+        """
+        if self.INBOX_RE.match(name):
+            # ensure inital INBOX is uppercase
+            return self.INBOX_NAME + name[len(self.INBOX_NAME):]
+        return name
+
     def _get_mailbox_by_name(self, name):
         """
-        Returns an mbox document by name.
+        Return an mbox document by name.
 
         :param name: the name of the mailbox
         :type name: str
 
         :rtype: SoledadDocument
         """
-        # XXX only upper for INBOX ---
-        name = name.upper()
         doc = self._soledad.get_from_index(
-            self.TYPE_MBOX_IDX, self.MBOX_KEY, name)
+            self.TYPE_MBOX_IDX, self.MBOX_KEY,
+            self._parse_mailbox_name(name))
         return doc[0] if doc else None
 
     @property
@@ -261,7 +275,7 @@ class SoledadBackedAccount(WithMsgFields, IndexedDB):
         """
         A list of the current mailboxes for this account.
         """
-        return [str(doc.content[self.MBOX_KEY])
+        return [doc.content[self.MBOX_KEY]
                 for doc in self._soledad.get_from_index(
                     self.TYPE_IDX, self.MBOX_KEY)]
 
@@ -270,7 +284,7 @@ class SoledadBackedAccount(WithMsgFields, IndexedDB):
         """
         A list of the current subscriptions for this account.
         """
-        return [str(doc.content[self.MBOX_KEY])
+        return [doc.content[self.MBOX_KEY]
                 for doc in self._soledad.get_from_index(
                     self.TYPE_SUBS_IDX, self.MBOX_KEY, '1')]
 
@@ -284,8 +298,8 @@ class SoledadBackedAccount(WithMsgFields, IndexedDB):
         :returns: a a SoledadMailbox instance
         :rtype: SoledadMailbox
         """
-        # XXX only upper for INBOX
-        name = name.upper()
+        name = self._parse_mailbox_name(name)
+
         if name not in self.mailboxes:
             raise imap4.MailboxException("No such mailbox")
 
@@ -297,12 +311,12 @@ class SoledadBackedAccount(WithMsgFields, IndexedDB):
 
     def addMailbox(self, name, creation_ts=None):
         """
-        Adds a mailbox to the account.
+        Add a mailbox to the account.
 
         :param name: the name of the mailbox
         :type name: str
 
-        :param creation_ts: a optional creation timestamp to be used as
+        :param creation_ts: an optional creation timestamp to be used as
                             mailbox id. A timestamp will be used if no
                             one is provided.
         :type creation_ts: int
@@ -310,9 +324,7 @@ class SoledadBackedAccount(WithMsgFields, IndexedDB):
         :returns: True if successful
         :rtype: bool
         """
-        # XXX only upper for INBOX
-        name = name.upper()
-        # XXX should check mailbox name for RFC-compliant form
+        name = self._parse_mailbox_name(name)
 
         if name in self.mailboxes:
             raise imap4.MailboxCollision, name
@@ -321,7 +333,7 @@ class SoledadBackedAccount(WithMsgFields, IndexedDB):
             # by default, we pass an int value
             # taken from the current time
             # we make sure to take enough decimals to get a unique
-            # maibox-uidvalidity.
+            # mailbox-uidvalidity.
             creation_ts = int(time.time() * 10E2)
 
         mbox = self._get_empty_mailbox()
@@ -346,8 +358,8 @@ class SoledadBackedAccount(WithMsgFields, IndexedDB):
         :raise MailboxException: Raised if this mailbox cannot be added.
         """
         # TODO raise MailboxException
-
-        paths = filter(None, pathspec.split('/'))
+        paths = filter(None,
+            self._parse_mailbox_name(pathspec).split('/'))
         for accum in range(1, len(paths)):
             try:
                 self.addMailbox('/'.join(paths[:accum]))
@@ -372,13 +384,12 @@ class SoledadBackedAccount(WithMsgFields, IndexedDB):
 
         :rtype: bool
         """
-        # XXX only upper for INBOX
-        name = name.upper()
+        name = self._parse_mailbox_name(name)
 
         if name not in self.mailboxes:
             return None
 
-        self.selected = str(name)
+        self.selected = name
 
         return SoledadMailbox(
             name, rw=readwrite,
@@ -398,8 +409,8 @@ class SoledadBackedAccount(WithMsgFields, IndexedDB):
                       names. use with care.
         :type force: bool
         """
-        # XXX only upper for INBOX
-        name = name.upper()
+        name = self._parse_mailbox_name(name)
+
         if not name in self.mailboxes:
             raise imap4.MailboxException("No such mailbox")
 
@@ -436,9 +447,8 @@ class SoledadBackedAccount(WithMsgFields, IndexedDB):
         :param newname: new name of the mailbox
         :type newname: str
         """
-        # XXX only upper for INBOX
-        oldname = oldname.upper()
-        newname = newname.upper()
+        oldname = self._parse_mailbox_name(oldname)
+        newname = self._parse_mailbox_name(newname)
 
         if oldname not in self.mailboxes:
             raise imap4.NoSuchMailbox, oldname
@@ -516,7 +526,7 @@ class SoledadBackedAccount(WithMsgFields, IndexedDB):
         :param name: name of the mailbox
         :type name: str
         """
-        name = name.upper()
+        name = self._parse_mailbox_name(name)
         if name not in self.subscriptions:
             self._set_subscription(name, True)
 
@@ -527,7 +537,7 @@ class SoledadBackedAccount(WithMsgFields, IndexedDB):
         :param name: name of the mailbox
         :type name: str
         """
-        name = name.upper()
+        name = self._parse_mailbox_name(name)
         if name not in self.subscriptions:
             raise imap4.MailboxException, "Not currently subscribed to " + name
         self._set_subscription(name, False)
@@ -549,7 +559,8 @@ class SoledadBackedAccount(WithMsgFields, IndexedDB):
         :type wildcard: str
         """
         # XXX use wildcard in index query
-        ref = self._inferiorNames(ref.upper())
+        ref = self._inferiorNames(
+            self._parse_mailbox_name(ref))
         wildcard = imap4.wildcardToRegexp(wildcard, '/')
         return [(i, self.getMailbox(i)) for i in ref if wildcard.match(i)]
 
diff --git a/src/leap/mail/imap/tests/test_imap.py b/src/leap/mail/imap/tests/test_imap.py
index f87b534..ea75854 100644
--- a/src/leap/mail/imap/tests/test_imap.py
+++ b/src/leap/mail/imap/tests/test_imap.py
@@ -521,7 +521,7 @@ class LeapIMAP4ServerTestCase(IMAP4HelperMixin, unittest.TestCase):
         """
         Test whether we can create mailboxes
         """
-        succeed = ('testbox', 'test/box', 'test/', 'test/box/box', 'FOOBOX')
+        succeed = ('testbox', 'test/box', 'test/', 'test/box/box', 'foobox')
         fail = ('testbox', 'test/box')
 
         def cb():
@@ -553,7 +553,7 @@ class LeapIMAP4ServerTestCase(IMAP4HelperMixin, unittest.TestCase):
         answers = ['foobox', 'testbox', 'test/box', 'test', 'test/box/box']
         mbox.sort()
         answers.sort()
-        self.assertEqual(mbox, [a.upper() for a in answers])
+        self.assertEqual(mbox, [a for a in answers])
 
     @deferred(timeout=None)
     def testDelete(self):
@@ -686,7 +686,7 @@ class LeapIMAP4ServerTestCase(IMAP4HelperMixin, unittest.TestCase):
         d.addCallback(lambda _:
                       self.assertEqual(
                           SimpleLEAPServer.theAccount.mailboxes,
-                          ['NEWNAME']))
+                          ['newname']))
         return d
 
     @deferred(timeout=None)
@@ -742,7 +742,7 @@ class LeapIMAP4ServerTestCase(IMAP4HelperMixin, unittest.TestCase):
         mboxes = SimpleLEAPServer.theAccount.mailboxes
         expected = ['newname', 'newname/m1', 'newname/m2']
         mboxes.sort()
-        self.assertEqual(mboxes, [s.upper() for s in expected])
+        self.assertEqual(mboxes, [s for s in expected])
 
     @deferred(timeout=None)
     def testSubscribe(self):
@@ -763,7 +763,7 @@ class LeapIMAP4ServerTestCase(IMAP4HelperMixin, unittest.TestCase):
         d.addCallback(lambda _:
                       self.assertEqual(
                           SimpleLEAPServer.theAccount.subscriptions,
-                          ['THIS/MBOX']))
+                          ['this/mbox']))
         return d
 
     @deferred(timeout=None)
@@ -771,8 +771,8 @@ class LeapIMAP4ServerTestCase(IMAP4HelperMixin, unittest.TestCase):
         """
         Test whether we can unsubscribe from a set of mailboxes
         """
-        SimpleLEAPServer.theAccount.subscribe('THIS/MBOX')
-        SimpleLEAPServer.theAccount.subscribe('THAT/MBOX')
+        SimpleLEAPServer.theAccount.subscribe('this/mbox')
+        SimpleLEAPServer.theAccount.subscribe('that/mbox')
 
         def login():
             return self.client.login('testuser', 'password-test')
@@ -788,7 +788,7 @@ class LeapIMAP4ServerTestCase(IMAP4HelperMixin, unittest.TestCase):
         d.addCallback(lambda _:
                       self.assertEqual(
                           SimpleLEAPServer.theAccount.subscriptions,
-                          ['THAT/MBOX']))
+                          ['that/mbox']))
         return d
 
     @deferred(timeout=None)
@@ -1029,7 +1029,7 @@ class LeapIMAP4ServerTestCase(IMAP4HelperMixin, unittest.TestCase):
         return d.addCallback(self._cbTestExamine)
 
     def _cbTestExamine(self, ignored):
-        mbox = self.server.theAccount.getMailbox('TEST-MAILBOX-E')
+        mbox = self.server.theAccount.getMailbox('test-mailbox-e')
         self.assertEqual(self.server.mbox.messages.mbox, mbox.messages.mbox)
         self.assertEqual(self.examinedArgs, {
             'EXISTS': 0, 'RECENT': 0, 'UIDVALIDITY': 42,
@@ -1070,8 +1070,8 @@ class LeapIMAP4ServerTestCase(IMAP4HelperMixin, unittest.TestCase):
         d.addCallback(lambda listed: self.assertEqual(
             sortNest(listed),
             sortNest([
-                (SoledadMailbox.INIT_FLAGS, "/", "ROOT/SUBTHINGL"),
-                (SoledadMailbox.INIT_FLAGS, "/", "ROOT/ANOTHER-THING")
+                (SoledadMailbox.INIT_FLAGS, "/", "root/subthingl"),
+                (SoledadMailbox.INIT_FLAGS, "/", "root/another-thing")
             ])
         ))
         return d
@@ -1081,13 +1081,13 @@ class LeapIMAP4ServerTestCase(IMAP4HelperMixin, unittest.TestCase):
         """
         Test LSub command
         """
-        SimpleLEAPServer.theAccount.subscribe('ROOT/SUBTHINGL2')
+        SimpleLEAPServer.theAccount.subscribe('root/subthingl2')
 
         def lsub():
             return self.client.lsub('root', '%')
         d = self._listSetup(lsub)
         d.addCallback(self.assertEqual,
-                      [(SoledadMailbox.INIT_FLAGS, "/", "ROOT/SUBTHINGL2")])
+                      [(SoledadMailbox.INIT_FLAGS, "/", "root/subthingl2")])
         return d
 
     @deferred(timeout=None)
@@ -1190,7 +1190,7 @@ class LeapIMAP4ServerTestCase(IMAP4HelperMixin, unittest.TestCase):
         return d.addCallback(self._cbTestFullAppend, infile)
 
     def _cbTestFullAppend(self, ignored, infile):
-        mb = SimpleLEAPServer.theAccount.getMailbox('ROOT/SUBTHING')
+        mb = SimpleLEAPServer.theAccount.getMailbox('root/subthing')
         self.assertEqual(1, len(mb.messages))
 
         self.assertEqual(