如何从 email.parser.Parser 返回的消息 object 中获取消息 body（或正文）？

Question

我正在阅读 Python 3 docs here，我一定是瞎了或什么的...它在哪里说如何获取消息的 body？

我想要做的是打开一条消息并在消息的 text-based 正文中执行一些循环，跳过二进制附件。伪代码：

def read_all_bodies(local_email_file):
    email = Parser().parse(open(local_email_file, 'r'))
    for pseudo_body in email.pseudo_bodies:
        if pseudo_body.pseudo_is_binary():
            continue
        # Pseudo-parse the body here

我该怎么做？甚至 Message class 是否正确 class？不是只有 headers 吗？

Answer 1

最好使用两个函数来完成：

一个打开文件。如果消息是单部分的，消息中的 get_payload returns 字符串。如果消息是多部分的，它 returns 子消息列表
第二个处理text/payload

这是可以做到的：

def parse_file_bodies(filename):
    # Opens file and parses email
    email = Parser().parse(open(filename, 'r'))
    # For multipart emails, all bodies will be handled in a loop
    if email.is_multipart():
        for msg in email.get_payload():
            parse_single_body(msg)
    else:
        # Single part message is passed diractly
        parse_single_body(email)

def parse_single_body(email):
    payload = email.get_payload(decode=True)
    # The payload is binary. It must be converted to
    # python string depending in input charset
    # Input charset may vary, based on message
    try:
        text = payload.decode("utf-8")
        # Now you can work with text as with any other string:
        ...
    except UnicodeDecodeError:
        print("Error: cannot parse message as UTF-8")
        return

如何从 email.parser.Parser 返回的消息 object 中获取消息 body（或正文）？

How to get message body (or bodies) from Message object returned by email.parser.Parser?

python

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