从mbox文件中提取电子邮件正文，将其解码为纯文本，而不考虑字符集和内容传输编码
从mbox文件中提取电子邮件正文，将其解码为纯文本，而不考虑字符集和内容传输编码
提问于 2011-08-24 04:08:27
我正在尝试使用Python 3从thunderbird mbox文件中提取电子邮件正文。这是一个IMAP帐户。
我希望有电子邮件正文的文本部分，以处理为unicode字符串。它应该看起来像Thunderbird中的电子邮件，并且不包含转义字符，如\r\n =20等。
我认为这是内容传输编码，我不知道如何解码或删除。我收到的电子邮件具有各种不同的内容类型和不同的内容传输编码。这是我目前的尝试：
import mailbox
import quopri,base64
def myconvert(encoded,ContentTransferEncoding):
if ContentTransferEncoding == 'quoted-printable':
result = quopri.decodestring(encoded)
elif ContentTransferEncoding == 'base64':
result = base64.b64decode(encoded)
mboxfile = 'C:/Users/Username/Documents/Thunderbird/Data/profile/ImapMail/server.name/INBOX'
for msg in mailbox.mbox(mboxfile):
if msg.is_multipart(): #Walk through the parts of the email to find the text body.
for part in msg.walk():
if part.is_multipart(): # If part is multipart, walk through the subparts.
for subpart in part.walk():
if subpart.get_content_type() == 'text/plain':
body = subpart.get_payload() # Get the subpart payload (i.e the message body)
for k,v in subpart.items():
if k == 'Content-Transfer-Encoding':
cte = v # Keep the Content Transfer Encoding
elif subpart.get_content_type() == 'text/plain':
body = part.get_payload() # part isn't multipart Get the payload
for k,v in part.items():
if k == 'Content-Transfer-Encoding':
cte = v # Keep the Content Transfer Encoding
print(body)
print('Body is of type:',type(body))
body = myconvert(body,cte)
print(body)但这失败了，原因是：
Body is of type: <class 'str'>
Traceback (most recent call last):
File "C:/Users/David/Documents/Python/test2.py", line 31, in <module>
body = myconvert(body,cte)
File "C:/Users/David/Documents/Python/test2.py", line 6, in myconvert
result = quopri.decodestring(encoded)
File "C:\Python32\lib\quopri.py", line 164, in decodestring
return a2b_qp(s, header=header)
TypeError: 'str' does not support the buffer interface回答 2
Stack Overflow用户
发布于 2011-08-25 17:27:20
这是一些完成工作的代码，它会打印错误，而不是在可能失败的消息中崩溃。我希望它能对你有所帮助。注意，如果Python3中有一个bug，并且已经修复，那么.get_payload(decode=True)这几行代码可能会返回一个字符串对象，而不是字节对象。我今天在2.7.2和Python 3.2.1上运行了这段代码。
import mailbox
def getcharsets(msg):
charsets = set({})
for c in msg.get_charsets():
if c is not None:
charsets.update([c])
return charsets
def handleerror(errmsg, emailmsg,cs):
print()
print(errmsg)
print("This error occurred while decoding with ",cs," charset.")
print("These charsets were found in the one email.",getcharsets(emailmsg))
print("This is the subject:",emailmsg['subject'])
print("This is the sender:",emailmsg['From'])
def getbodyfromemail(msg):
body = None
#Walk through the parts of the email to find the text body.
if msg.is_multipart():
for part in msg.walk():
# If part is multipart, walk through the subparts.
if part.is_multipart():
for subpart in part.walk():
if subpart.get_content_type() == 'text/plain':
# Get the subpart payload (i.e the message body)
body = subpart.get_payload(decode=True)
#charset = subpart.get_charset()
# Part isn't multipart so get the email body
elif part.get_content_type() == 'text/plain':
body = part.get_payload(decode=True)
#charset = part.get_charset()
# If this isn't a multi-part message then get the payload (i.e the message body)
elif msg.get_content_type() == 'text/plain':
body = msg.get_payload(decode=True)
# No checking done to match the charset with the correct part.
for charset in getcharsets(msg):
try:
body = body.decode(charset)
except UnicodeDecodeError:
handleerror("UnicodeDecodeError: encountered.",msg,charset)
except AttributeError:
handleerror("AttributeError: encountered" ,msg,charset)
return body
#mboxfile = 'C:/Users/Username/Documents/Thunderbird/Data/profile/ImapMail/server.name/INBOX'
print(mboxfile)
for thisemail in mailbox.mbox(mboxfile):
body = getbodyfromemail(thisemail)
print(body[0:1000])Stack Overflow用户
发布于 2015-10-21 12:44:51
此脚本似乎正确地返回了所有消息：
def getcharsets(msg):
charsets = set({})
for c in msg.get_charsets():
if c is not None:
charsets.update([c])
return charsets
def getBody(msg):
while msg.is_multipart():
msg=msg.get_payload()[0]
t=msg.get_payload(decode=True)
for charset in getcharsets(msg):
t=t.decode(charset)
return t来自acd的前一个答案通常只返回真实消息的一些页脚。(至少在我为这个工具箱打开的GMANE电子邮件消息中：https://pypi.python.org/pypi/gmane )
干杯
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/7166922
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