在 python 中将 email.HeaderParser 与 imaplib.fetch 一起使用？
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Using email.HeaderParser with imaplib.fetch in python?
提问by Hortitude
Does anyone have a good example of using the HeaderParser class in Python for a message that you pull down with imaplib.fetch?
有没有人有在 Python 中使用 HeaderParser 类来处理使用 imaplib.fetch 下拉的消息的好例子？
I have been able to find a lot of related things, but nothing that does just this.
我已经能够找到很多相关的东西，但没有什么能做到这一点。
Do I need to full down the fetch has an RFC822? I was hoping to simply pull down the subjects.
我是否需要完全关闭 fetch 具有 RFC822 的内容？我希望简单地拉下主题。
Thanks!
谢谢！
回答by Jarret Hardie
Good news: you're right... you don't need to pull down the RFC822. The message_partsparameter to fetch()lets you be quite fine-grained.
好消息：你是对的……你不需要拉下 RFC822。该message_parts参数fetch()可以让你非常细粒度。
Here's a simple example of how to fetch just the header:
这是一个简单的示例，说明如何仅获取标头：
import imaplib
from email.parser import HeaderParser
conn = imaplib.IMAP4('my.host.com')
conn.login('[email protected]', 'mypassword')
conn.select()
conn.search(None, 'ALL') # returns a nice list of messages...
# let's say I pick #1 from this
data = conn.fetch(1, '(BODY[HEADER])')
# gloss over data structure of return... I assume you know these
# gives something like:
# ('OK', [(1 (BODY[HEADER] {1662', 'Received: etc....')])
header_data = data[1][0][1]
parser = HeaderParser()
msg = parser.parsestr(header_data)
<email.message.Message instance at 0x2a>
print msg.keys()
['Received', 'Received', 'Received', 'Cc', 'Message-Id', 'From', 'To',
'In-Reply-To', 'Content-Type', 'Content-Transfer-Encoding', 'Mime-Version',
'Subject', 'Date', 'References', 'X-Mailer',
'X-yoursite-MailScanner-Information',
'X-yoursite-MailScanner', 'X-yoursite-MailScanner-From', 'Return-Path',
'X-OriginalArrivalTime']
The full list of message parts that can be passed as the second argument to fetchis in the IMAP4 spec: http://tools.ietf.org/html/rfc1730#section-6.4.5
可以作为第二个参数传递的消息部分的完整列表fetch在 IMAP4 规范中：http: //tools.ietf.org/html/rfc1730#section-6.4.5
