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import re
# 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 = re.compile(r'^[0-9A-F]+$', re.I)
wkt_regex = re.compile(r'^(SRID=(?P<srid>\d+);)?'
r'(?P<wkt>'
r'(?P<type>POINT|LINESTRING|LINEARRING|POLYGON|MULTIPOINT|MULTILINESTRING|MULTIPOLYGON|GEOMETRYCOLLECTION)'
r'[ACEGIMLONPSRUTYZ\d,\.\-\(\) ]+)$',
re.I)
json_regex = re.compile(r'^(\s+)?\{[\s\w,\[\]\{\}\-\."\':]+\}(\s+)?$')
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