Convert unicode to str when raising in IMAP server (#4830).

3 files changed, 32 insertions, 6 deletions

diff --git a/changes/bug_4830_convert-unicode-to-str-when-raising b/changes/bug_4830_convert-unicode-to-str-when-raising
new file mode 100644
index 0000000..86d9b1c
--- /dev/null
+++ b/changes/bug_4830_convert-unicode-to-str-when-raising
@@ -0,0 +1 @@
+  o Convert unicode to str when raising exceptions in IMAP server (#4830).
diff --git a/src/leap/mail/imap/account.py b/src/leap/mail/imap/account.py
index fd861e7..8f5b57b 100644
--- a/src/leap/mail/imap/account.py
+++ b/src/leap/mail/imap/account.py
@@ -36,6 +36,23 @@ from leap.soledad.client import Soledad
 #######################################
 
 
+def _unicode_as_str(text):
+    """
+    Return some representation of C{text} as a str.
+
+    This is here mainly because Twisted's exception methods are not able to
+    print unicode text.
+
+    :param text: The text to convert.
+    :type text: unicode
+
+    :return: A representation of C{text} as str.
+    :rtype: str
+    """
+    # XXX is there a better str representation for unicode?
+    return repr(text)
+
+
 class SoledadBackedAccount(WithMsgFields, IndexedDB, MBoxParser):
     """
     An implementation of IAccount and INamespacePresenteer
@@ -128,7 +145,8 @@ class SoledadBackedAccount(WithMsgFields, IndexedDB, MBoxParser):
         name = self._parse_mailbox_name(name)
 
         if name not in self.mailboxes:
-            raise imap4.MailboxException("No such mailbox")
+            raise imap4.MailboxException("No such mailbox: %s" %
+                                         _unicode_as_str(name))
 
         return SoledadMailbox(name, soledad=self._soledad)
 
@@ -154,7 +172,7 @@ class SoledadBackedAccount(WithMsgFields, IndexedDB, MBoxParser):
         name = self._parse_mailbox_name(name)
 
         if name in self.mailboxes:
-            raise imap4.MailboxCollision, name
+            raise imap4.MailboxCollision, _unicode_as_str(name)
 
         if not creation_ts:
             # by default, we pass an int value
@@ -240,7 +258,8 @@ class SoledadBackedAccount(WithMsgFields, IndexedDB, MBoxParser):
         name = self._parse_mailbox_name(name)
 
         if not name in self.mailboxes:
-            raise imap4.MailboxException("No such mailbox")
+            raise imap4.MailboxException("No such mailbox: %s" %
+                                         _unicode_as_str(name))
 
         mbox = self.getMailbox(name)
 
@@ -279,14 +298,14 @@ class SoledadBackedAccount(WithMsgFields, IndexedDB, MBoxParser):
         newname = self._parse_mailbox_name(newname)
 
         if oldname not in self.mailboxes:
-            raise imap4.NoSuchMailbox, oldname
+            raise imap4.NoSuchMailbox, _unicode_as_str(oldname)
 
         inferiors = self._inferiorNames(oldname)
         inferiors = [(o, o.replace(oldname, newname, 1)) for o in inferiors]
 
         for (old, new) in inferiors:
             if new in self.mailboxes:
-                raise imap4.MailboxCollision, new
+                raise imap4.MailboxCollision, _unicode_as_str(new)
 
         for (old, new) in inferiors:
             mbox = self._get_mailbox_by_name(old)
@@ -367,7 +386,8 @@ class SoledadBackedAccount(WithMsgFields, IndexedDB, MBoxParser):
         """
         name = self._parse_mailbox_name(name)
         if name not in self.subscriptions:
-            raise imap4.MailboxException, "Not currently subscribed to " + name
+            raise imap4.MailboxException, \
+                "Not currently subscribed to %s" % _unicode_as_str(name)
         self._set_subscription(name, False)
 
     def listMailboxes(self, ref, wildcard):
diff --git a/src/leap/mail/imap/parser.py b/src/leap/mail/imap/parser.py
index 306dcf0..6a9ace9 100644
--- a/src/leap/mail/imap/parser.py
+++ b/src/leap/mail/imap/parser.py
@@ -102,6 +102,11 @@ class MBoxParser(object):
 
     def _parse_mailbox_name(self, name):
         """
+        Return a normalized representation of the mailbox C{name}.
+
+        This method ensures that an eventual initial 'inbox' part of a
+        mailbox name is made uppercase.
+
         :param name: the name of the mailbox
         :type name: unicode