To avoid hang up in using CGIXMLRPCRequestHandler under IIS 7.x

[sjtuer]

BPO	6728
Nosy	@birkenfeld

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2010-08-02.20:35:20.811>
created_at = <Date 2009-08-18.15:58:07.724>
labels = ['type-feature', 'library']
title = 'To avoid hang up in using CGIXMLRPCRequestHandler under IIS 7.x'
updated_at = <Date 2010-08-02.20:35:20.809>
user = 'https://bugs.python.org/sjtuer'

bugs.python.org fields:

activity = <Date 2010-08-02.20:35:20.809>
actor = 'georg.brandl'
assignee = 'none'
closed = True
closed_date = <Date 2010-08-02.20:35:20.811>
closer = 'georg.brandl'
components = ['Library (Lib)']
creation = <Date 2009-08-18.15:58:07.724>
creator = 'sjtuer'
dependencies = []
files = []
hgrepos = []
issue_num = 6728
keywords = []
message_count = 2.0
messages = ['91707', '112537']
nosy_count = 2.0
nosy_names = ['georg.brandl', 'sjtuer']
pr_nums = []
priority = 'normal'
resolution = 'works for me'
stage = None
status = 'closed'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue6728'
versions = ['Python 3.2']

[sjtuer]

The mismatched content length will cause hang up in sys.stdin.read().
The reason is probably described in bpo-1214 as well as 1725295.

length = int(os.environ.get('CONTENT_LENGTH', None))
"""Length fix for IIS 7.x to avoid hang up"""
length=length-2

I would appreciate if someone can create a diff or patch file for the
code above.

[birkenfeld]

Why would one read 2 bytes less than CONTENT_LENGTH?