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Patch 560023 adding docstrings. 2.2 Candidate (after verifying modules were not updated after 2.2).

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Raymond Hettinger 2002-05-29 16:18:42 +00:00
parent d68f5171eb
commit aef22fb9cd
9 changed files with 499 additions and 8 deletions
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59
Lib/MimeWriter.py
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@ -1,8 +1,11 @@
"""Generic MIME writer.
Classes:
MimeWriter - the only thing here.
This module defines the class MimeWriter. The MimeWriter class implements
a basic formatter for creating MIME multi-part files. It doesn't seek around
the output file nor does it use large amounts of buffer space. You must write
the parts out in the order that they should occur in the final file.
MimeWriter does buffer the headers you add, allowing you to rearrange their
order.
"""
@ -86,6 +89,14 @@ class MimeWriter:
self._headers = []
def addheader(self, key, value, prefix=0):
"""Add a header line to the MIME message.
The key is the name of the header, where the value obviously provides
the value of the header. The optional argument prefix determines
where the header is inserted; 0 means append at the end, 1 means
insert at the start. The default is to append.
"""
lines = value.split("\n")
while lines and not lines[-1]: del lines[-1]
while lines and not lines[0]: del lines[0]
@ -99,10 +110,26 @@ class MimeWriter:
self._headers.append(line)
def flushheaders(self):
"""Writes out and forgets all headers accumulated so far.
This is useful if you don't need a body part at all; for example,
for a subpart of type message/rfc822 that's (mis)used to store some
header-like information.
"""
self._fp.writelines(self._headers)
self._headers = []
def startbody(self, ctype, plist=[], prefix=1):
"""Returns a file-like object for writing the body of the message.
The content-type is set to the provided ctype, and the optional
parameter, plist, provides additional parameters for the
content-type declaration. The optional argument prefix determines
where the header is inserted; 0 means append at the end, 1 means
insert at the start. The default is to insert at the start.
"""
for name, value in plist:
ctype = ctype + ';\n %s=\"%s\"' % (name, value)
self.addheader("Content-Type", ctype, prefix=prefix)
@ -111,16 +138,42 @@ class MimeWriter:
return self._fp
def startmultipartbody(self, subtype, boundary=None, plist=[], prefix=1):
"""Returns a file-like object for writing the body of the message.
Additionally, this method initializes the multi-part code, where the
subtype parameter provides the multipart subtype, the boundary
parameter may provide a user-defined boundary specification, and the
plist parameter provides optional parameters for the subtype. The
optional argument, prefix, determines where the header is inserted;
0 means append at the end, 1 means insert at the start. The default
is to insert at the start. Subparts should be created using the
nextpart() method.
"""
self._boundary = boundary or mimetools.choose_boundary()
return self.startbody("multipart/" + subtype,
[("boundary", self._boundary)] + plist,
prefix=prefix)
def nextpart(self):
"""Returns a new instance of MimeWriter which represents an
individual part in a multipart message.
This may be used to write the part as well as used for creating
recursively complex multipart messages. The message must first be
initialized with the startmultipartbody() method before using the
nextpart() method.
"""
self._fp.write("\n--" + self._boundary + "\n")
return self.__class__(self._fp)
def lastpart(self):
"""This is used to designate the last part of a multipart message.
It should always be used when writing multipart messages.
"""
self._fp.write("\n--" + self._boundary + "--\n")