geometry.py

import re

from django.utils.regex_helper import _lazy_re_compile

# Regular expression for recognizing HEXEWKB and WKT.  A prophylactic measure
# to prevent potentially malicious input from reaching the underlying C
# library. Not a substitute for good web security programming practices.
hex_regex = _lazy_re_compile(r"^[0-9A-F]+$", re.I)
wkt_regex = _lazy_re_compile(
    r"^(SRID=(?P<srid>\-?\d+);)?"
    r"(?P<wkt>"
    r"(?P<type>POINT|LINESTRING|LINEARRING|POLYGON|MULTIPOINT|"
    r"MULTILINESTRING|MULTIPOLYGON|GEOMETRYCOLLECTION)"
    r"[ACEGIMLONPSRUTYZ\d,\.\-\+\(\) ]+)$",
    re.I,
)
json_regex = _lazy_re_compile(r"^(\s+)?\{.*}(\s+)?$", re.DOTALL)