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"""headers."""
def _parse_param(s):
while s[:1] == ';':
s = s[1:]
end = s.find(';')
while end > 0 and (s.count('"', 0, end) - s.count('\\"', 0, end)) % 2:
end = s.find(';', end + 1)
if end < 0:
end = len(s)
f = s[:end]
yield f.strip()
s = s[end:]
def parse_header(line):
"""Parse a Content-type like header.
Return the main content-type and a dictionary of options.
Copied from removed stdlib cgi module. See
`cherrypy/cherrypy#2014 (comment)
<https://github.com/cherrypy/cherrypy/issues/2014#issuecomment-1883774891>`_
for background.
"""
parts = _parse_param(';' + line)
key = parts.__next__()
pdict = {}
for p in parts:
i = p.find('=')
if i >= 0:
name = p[:i].strip().lower()
value = p[i + 1:].strip()
if len(value) >= 2 and value[0] == value[-1] == '"':
value = value[1:-1]
value = value.replace('\\\\', '\\').replace('\\"', '"')
pdict[name] = value
return key, pdict
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