folder.IMAP: Improve dropped connection handling in quickchanged()
The quickchanged() function was not handling dropped connections yet. If IMAP4.select() throws a FOLDER_RETRY error, we will now discard the connection, reconnect and retry. Signed-off-by: Sebastian Spaeth <Sebastian@SSpaeth.de> Signed-off-by: Nicolas Sebrecht <nicolas.s-dev@laposte.net>
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@ -89,10 +89,22 @@ class IMAPFolder(BaseFolder):
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# An IMAP folder has definitely changed if the number of
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# An IMAP folder has definitely changed if the number of
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# messages or the UID of the last message have changed. Otherwise
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# messages or the UID of the last message have changed. Otherwise
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# only flag changes could have occurred.
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# only flag changes could have occurred.
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retry = True # Should we attempt another round or exit?
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while retry:
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retry = False
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imapobj = self.imapserver.acquireconnection()
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imapobj = self.imapserver.acquireconnection()
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try:
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try:
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# Primes untagged_responses
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# Select folder and get number of messages
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imaptype, imapdata = imapobj.select(self.getfullname(), readonly = 1, force = 1)
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restype, imapdata = imapobj.select(self.getfullname(), True,
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True)
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except OfflineImapError, e:
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# retry on dropped connections, raise otherwise
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self.imapserver.releaseconnection(imapobj, true)
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if e.severity == OfflineImapError.ERROR.FOLDER_RETRY:
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retry = True
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else: raise
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finally:
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self.imapserver.releaseconnection(imapobj)
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# 1. Some mail servers do not return an EXISTS response
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# 1. Some mail servers do not return an EXISTS response
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# if the folder is empty. 2. ZIMBRA servers can return
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# if the folder is empty. 2. ZIMBRA servers can return
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# multiple EXISTS replies in the form 500, 1000, 1500,
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# multiple EXISTS replies in the form 500, 1000, 1500,
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@ -102,13 +114,9 @@ class IMAPFolder(BaseFolder):
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maxmsgid = 0
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maxmsgid = 0
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for msgid in imapdata:
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for msgid in imapdata:
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maxmsgid = max(long(msgid), maxmsgid)
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maxmsgid = max(long(msgid), maxmsgid)
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# Different number of messages than last time?
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# Different number of messages than last time?
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if maxmsgid != statusfolder.getmessagecount():
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if maxmsgid != statusfolder.getmessagecount():
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return True
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return True
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finally:
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self.imapserver.releaseconnection(imapobj)
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return False
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return False
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def cachemessagelist(self):
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def cachemessagelist(self):
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