11.13.1 Message Objects

A Message instance has the following methods:

rewindbody ()

Seek to the start of the message body. This only works if the file object is seekable.

getallmatchingheaders (name)

Return a list of lines consisting of all headers matching name, if any. Each physical line, whether it is a continuation line or not, is a separate list item. Return the empty list if no header matches name.

getfirstmatchingheader (name)

Return a list of lines comprising the first header matching name, and its continuation line(s), if any. Return None if there is no header matching name.

getrawheader (name)

Return a single string consisting of the text after the colon in the first header matching name. This includes leading whitespace, the trailing linefeed, and internal linefeeds and whitespace if there any continuation line(s) were present. Return None if there is no header matching name.

getheader (name)

Like getrawheader(name), but strip leading and trailing whitespace. Internal whitespace is not stripped.

getaddr (name)

Return a pair (full name, email address) parsed from the string returned by getheader(name). If no header matching name exists, return (None, None); otherwise both the full name and the address are (possibly empty) strings.

Example: If m's first From header contains the string 'jack@cwi.nl (Jack Jansen)', then m.getaddr('From') will yield the pair ('Jack Jansen', 'jack@cwi.nl'). If the header contained 'Jack Jansen <jack@cwi.nl>' instead, it would yield the exact same result.

getaddrlist (name)

This is similar to getaddr(list), but parses a header containing a list of email addresses (e.g. a To header) and returns a list of (full name, email address) pairs (even if there was only one address in the header). If there is no header matching name, return an empty list.

XXX The current version of this function is not really correct. It yields bogus results if a full name contains a comma.

getdate (name)

Retrieve a header using getheader() and parse it into a 9-tuple compatible with time.mktime(). If there is no header matching name, or it is unparsable, return None.

Date parsing appears to be a black art, and not all mailers adhere to the standard. While it has been tested and found correct on a large collection of email from many sources, it is still possible that this function may occasionally yield an incorrect result.

getdate_tz (name)

Retrieve a header using getheader() and parse it into a 10-tuple; the first 9 elements will make a tuple compatible with time.mktime(), and the 10th is a number giving the offset of the date's timezone from UTC. Similarly to getdate(), if there is no header matching name, or it is unparsable, return None.

Message instances also support a read-only mapping interface. In particular: m[name] is like m.getheader(name) but raises KeyError if there is no matching header; and len(m), m.has_key(name), m.keys(), m.values() and m.items() act as expected (and consistently).

Finally, Message instances have two public instance variables:

headers

A list containing the entire set of header lines, in the order in which they were read. Each line contains a trailing newline. The blank line terminating the headers is not contained in the list.

fp

The file object passed at instantiation time.