mirror of
https://github.com/morpheus65535/bazarr
synced 2024-12-27 01:57:33 +00:00
53 lines
1.5 KiB
Python
53 lines
1.5 KiB
Python
|
"""
|
||
|
|
This contains a bunch of RFC7230 definitions and regular expressions that are
|
||
|
|
needed to properly parse HTTP messages.
|
||
|
|
"""
|
||
|
|
|
||
|
|
import re
|
||
|
|
|
||
|
|
from .compat import tobytes
|
||
|
|
|
||
|
|
WS = "[ \t]"
|
||
|
|
OWS = WS + "{0,}?"
|
||
|
|
RWS = WS + "{1,}?"
|
||
|
|
BWS = OWS
|
||
|
|
|
||
|
|
# RFC 7230 Section 3.2.6 "Field Value Components":
|
||
|
|
# tchar = "!" / "#" / "$" / "%" / "&" / "'" / "*"
|
||
|
|
# / "+" / "-" / "." / "^" / "_" / "`" / "|" / "~"
|
||
|
|
# / DIGIT / ALPHA
|
||
|
|
# obs-text = %x80-FF
|
||
|
|
TCHAR = r"[!#$%&'*+\-.^_`|~0-9A-Za-z]"
|
||
|
|
OBS_TEXT = r"\x80-\xff"
|
||
|
|
|
||
|
|
TOKEN = TCHAR + "{1,}"
|
||
|
|
|
||
|
|
# RFC 5234 Appendix B.1 "Core Rules":
|
||
|
|
# VCHAR = %x21-7E
|
||
|
|
# ; visible (printing) characters
|
||
|
|
VCHAR = r"\x21-\x7e"
|
||
|
|
|
||
|
|
# header-field = field-name ":" OWS field-value OWS
|
||
|
|
# field-name = token
|
||
|
|
# field-value = *( field-content / obs-fold )
|
||
|
|
# field-content = field-vchar [ 1*( SP / HTAB ) field-vchar ]
|
||
|
|
# field-vchar = VCHAR / obs-text
|
||
|
|
|
||
|
|
# Errata from: https://www.rfc-editor.org/errata_search.php?rfc=7230&eid=4189
|
||
|
|
# changes field-content to:
|
||
|
|
#
|
||
|
|
# field-content = field-vchar [ 1*( SP / HTAB / field-vchar )
|
||
|
|
# field-vchar ]
|
||
|
|
|
||
|
|
FIELD_VCHAR = "[" + VCHAR + OBS_TEXT + "]"
|
||
|
|
# Field content is more greedy than the ABNF, in that it will match the whole value
|
||
|
|
FIELD_CONTENT = FIELD_VCHAR + "+(?:[ \t]+" + FIELD_VCHAR + "+)*"
|
||
|
|
# Which allows the field value here to just see if there is even a value in the first place
|
||
|
|
FIELD_VALUE = "(?:" + FIELD_CONTENT + ")?"
|
||
|
|
|
||
|
|
HEADER_FIELD = re.compile(
|
||
|
|
tobytes(
|
||
|
|
"^(?P<name>" + TOKEN + "):" + OWS + "(?P<value>" + FIELD_VALUE + ")" + OWS + "$"
|
||
|
|
)
|
||
|
|
)
|