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fix: 修复 IMAP fetch 方法返回生成器导致的 TypeError (#764)
修复了在 K8s 环境中运行时出现的错误:
File "/usr/local/lib/python3.12/site-packages/twisted/mail/imap4.py", line 1685, in __cbManualSearch
lastSequenceId = result and result[-1][0]
TypeError: 'generator' object is not subscriptable
问题原因:
- fetch 方法返回了生成器对象
- Twisted IMAP4 库在处理 SEARCH 命令时需要对结果进行索引访问
- 生成器不支持索引操作
解决方案:
- 将 fetch 方法的返回值从生成器改为列表
- 保持 fetchGenerator 方法的分批获取逻辑(batch_size=20)
- 确保内存占用可控的同时支持所有 IMAP 操作
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@@ -135,16 +135,16 @@ class SimpleMailbox:
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def fetch(self, messages, uid):
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"""边查边返回邮件"""
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def email_generator():
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for range_item in messages.ranges:
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start, end = range_item
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_logger.info(f"Fetching messages: {self.name}, range: {start}-{end}")
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result = []
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for range_item in messages.ranges:
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start, end = range_item
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_logger.info(f"Fetching messages: {self.name}, range: {start}-{end}")
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for email_data in self.fetchGenerator(start, end):
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yield email_data
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for email_data in self.fetchGenerator(start, end):
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result.append(email_data)
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# 返回生成器,让IMAP4服务器逐个处理
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return email_generator()
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# 返回列表而不是生成器,以支持 IMAP SEARCH 等需要索引访问的操作
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return result
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def fetchGenerator(self, start, end):
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"""通用的邮件获取生成器,边查边返回"""
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