mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-08-29 05:05:03 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 8

bpo-35028: cgi: Fix max_num_fields off by one error (GH-9973)

Browse source 
https://bugs.python.org/issue35028
This commit is contained in:
matthewbelisle-wf 2018-10-23 03:14:35 -05:00 • committed by Miss Islington (bot)
parent b7d62050e7
commit b79b5c0949
2 changed files with 24 additions and 18 deletions
Download patch file Download diff file Expand all files Collapse all files

23
Lib/cgi.py
View file

@ -618,6 +618,11 @@ class FieldStorage:
first_line = self.fp.readline()
self.bytes_read += len(first_line)
# Propagate max_num_fields into the sub class appropriately
max_num_fields = self.max_num_fields
if max_num_fields is not None:
max_num_fields -= len(self.list)
while True:
parser = FeedParser()
hdr_text = b""
@ -637,23 +642,19 @@ class FieldStorage:
if 'content-length' in headers:
del headers['content-length']
# Propagate max_num_fields into the sub class appropriately
sub_max_num_fields = self.max_num_fields
if sub_max_num_fields is not None:
sub_max_num_fields -= len(self.list)
part = klass(self.fp, headers, ib, environ, keep_blank_values,
strict_parsing,self.limit-self.bytes_read,
self.encoding, self.errors, sub_max_num_fields)
self.encoding, self.errors, max_num_fields)
max_num_fields = self.max_num_fields
if max_num_fields is not None and part.list:
max_num_fields -= len(part.list)
if max_num_fields is not None:
max_num_fields -= 1
if part.list:
max_num_fields -= len(part.list)
if max_num_fields < 0:
raise ValueError('Max number of fields exceeded')
self.bytes_read += part.bytes_read
self.list.append(part)
if max_num_fields is not None and max_num_fields < len(self.list):
raise ValueError('Max number of fields exceeded')
if part.done or self.bytes_read >= self.length > 0:
break
self.skip_lines()