python imaplib -错误‘意外的repsonse’

Question

您好，我突然遇到一个错误，在一些代码上使用imaplib之前工作得很好。

import imaplib
m = imaplib.IMAP4('myserver','port')
m.login(r'username','password')
m.select()

给了我这个错误

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.7/imaplib.py", line 649, in select
    typ, dat = self._simple_command(name, mailbox)
  File "/usr/lib/python2.7/imaplib.py", line 1070, in _simple_command
    return self._command_complete(name, self._command(name, *args))
  File "/usr/lib/python2.7/imaplib.py", line 899, in _command_complete
    raise self.abort('command: %s => %s' % (name, val))
imaplib.abort: command: SELECT => unexpected response: '*  1520 EXISTS'

我不确定这是什么意思。电子邮件在其他方面都很好，而且我使用davmail作为服务器。

该程序完整地将具有特定名称的附件保存在特定文件夹中。

我已经一步步通过它了，这肯定是m.select()的问题所在。

直到最近，同样的程序都运行得很好。

我做错了什么，我该如何修复它？

活动日志如下

>>> import imaplib
>>> m = imaplib.IMAP4('server','port')
>>> Debug=4
>>> m.debug
0
>>> m.debug=4
>>> m.debug
4
>>> m.login(r'username','password')
  01:26.55 > HLFI1 LOGIN "username" "password"
  01:30.76 < HLFI1 OK Authenticated
('OK', ['Authenticated'])
>>> m.list()
  01:56.33 > HLFI2 LIST "" *
  02:00.04 < * LIST (\HasNoChildren) "/" "Trash/Sent Messages"
  02:00.04 < * LIST (\HasNoChildren) "/" "Sync Issues/Server Failures"
  02:00.04 < * LIST (\HasNoChildren) "/" "Sync Issues/Local Failures"
  02:00.04 < * LIST (\HasNoChildren) "/" "Sync Issues/Conflicts"
  02:00.04 < * LIST (\HasChildren) "/" "Sync Issues"
  02:00.04 < * LIST (\HasNoChildren) "/" "Junk E-mail"
  02:00.04 < * LIST (\HasNoChildren) "/" "Drafts"
  02:00.04 < * LIST (\HasChildren) "/" "Trash"
  02:00.04 < * LIST (\HasNoChildren) "/" "Sent"
  02:00.04 < * LIST (\HasNoChildren) "/" "Outbox"
  02:00.04 < * LIST (\HasNoChildren) "/" "INBOX"
  02:00.04 < HLFI2 OK LIST completed
('OK', ['(\\HasNoChildren) "/" "Trash/Sent Messages"', '(\\HasNoChildren) "/" "Sync Issues/Server Failures"', '(\\HasNoChildren) "/" "Sync Issues/Local Failures"', '(\\HasNoChildren) "/" "Sync Issues/Conflicts"', '(\\HasChildren) "/" "Sync Issues"', '(\\HasNoChildren) "/" "Junk E-mail"', '(\\HasNoChildren) "/" "Drafts"', '(\\HasChildren) "/" "Trash"', '(\\HasNoChildren) "/" "Sent"', '(\\HasNoChildren) "/" "Outbox"', '(\\HasNoChildren) "/" "INBOX"'])
>>> m.select()
  02:21.37 > HLFI3 SELECT INBOX
  02:30.87 < *  1548 EXISTS
  02:30.87 last 4 IMAP4 interactions:
  00:16.73 < * OK [CAPABILITY IMAP4REV1 AUTH=LOGIN MOVE] IMAP4rev1 DavMail 4.3.0-2125 server ready
  00:16.73 > HLFI0 CAPABILITY
  00:16.74 < * CAPABILITY IMAP4REV1 AUTH=LOGIN MOVE
  00:16.77 < HLFI0 OK CAPABILITY completed
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.7/imaplib.py", line 649, in select
    typ, dat = self._simple_command(name, mailbox)
  File "/usr/lib/python2.7/imaplib.py", line 1070, in _simple_command
    return self._command_complete(name, self._command(name, *args))
  File "/usr/lib/python2.7/imaplib.py", line 899, in _command_complete
    raise self.abort('command: %s => %s' % (name, val))
imaplib.abort: command: SELECT => unexpected response: '*  1548 EXISTS'

**更新**

我现在已经在python-dev上提交了一个bug

Bug report on Python

David Murray说响应是不符合RFC的

第二次是在davmail sourceforge的

davmail bug report

M guessant说，IMAP有必要保持存活。

我会随时更新这方面的进展..

Answer 1

似乎是RECENT响应中填充空格的消息计数触发了这种情况。我不清楚它应该被归类为Python的imaplib中的错误还是您正在使用的IMAP服务器中的错误。我会争辩说，无论规范怎么说，imaplib都应该对此健壮。也许你应该提交一份bug报告？

(如果您这样做了，请注意添加有关生成此响应的服务器的详细信息。如果它是一个具有可观市场份额的商业产品，修复它是很重要的，而如果它是您自己的简单Python服务器，他们可能不会关心。)

Answer 2

发现davmail填充了EXISTS命令的响应，似乎是邮件数在500时。

可接受的回答：

  58:24.54 > PJJD3 EXAMINE INBOX
  58:24.77 < * 486 EXISTS
  58:24.78      matched r'\* (?P<data>\d+) (?P<type>[A-Z-]+)( (?P<data2>.*))?' => ('486', 'EXISTS', None, None)
  58:24.78 untagged_responses[EXISTS] 0 += ["486"]

失败的响应：

  57:50.86 > KPFE3 EXAMINE INBOX
  57:51.10 < *  953 EXISTS
  57:51.10 last 0 IMAP4 interactions:
  57:51.10 > KPFE4 LOGOUT

我已经为github上的imaplib库创建了一个拉取请求，以解决该问题

要修补imaplib允许修改正则表达式的代码，只需在代码中添加以下内容：

imaplib.Untagged_status = imaplib.re.compile(br'\*[ ]{1,2}(?P<data>\d+) (?P<type>[A-Z-]+)( (?P<data2>.*))?')