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In read_multi, allow a subclass to override the class we instantiate

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when we create a recursive instance, by setting the class variable
'FieldStorageClass' to the desired class.  By default, this is set to
None, in which case we use self.__class__ (as before).
This commit is contained in:
Guido van Rossum 1998-12-09 22:16:46 +00:00
parent f8b3b944aa
commit 030d2ec16c
1 changed files with 7 additions and 4 deletions
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7
Lib/cgi.py
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@ -919,15 +919,18 @@ class FieldStorage:
self.list.append(MiniFieldStorage(key, value)) self.list.append(MiniFieldStorage(key, value))
self.skip_lines() self.skip_lines()
FieldStorageClass = None
def read_multi(self, environ, keep_blank_values, strict_parsing): def read_multi(self, environ, keep_blank_values, strict_parsing):
"""Internal: read a part that is itself multipart.""" """Internal: read a part that is itself multipart."""
self.list = [] self.list = []
part = self.__class__(self.fp, {}, self.innerboundary, klass = self.FieldStorageClass or self.__class__
part = klass(self.fp, {}, self.innerboundary,
environ, keep_blank_values, strict_parsing) environ, keep_blank_values, strict_parsing)
# Throw first part away # Throw first part away
while not part.done: while not part.done:
headers = rfc822.Message(self.fp) headers = rfc822.Message(self.fp)
part = self.__class__(self.fp, headers, self.innerboundary, part = klass(self.fp, headers, self.innerboundary,
environ, keep_blank_values, strict_parsing) environ, keep_blank_values, strict_parsing)
self.list.append(part) self.list.append(part)
self.skip_lines() self.skip_lines()