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'''
Shared code for ssi_server.py and ssi_expander.py.
'''
import re
import pathlib
_ssierr = b"<!-- SSI ERROR -->"
_ssiok = b""
def _dovar(vars, match, e, fn):
cmd = match.group(1)
var = match.group(2)
val = match.group(3)
if cmd == b"set":
if val is None:
e("SSI set(%s) without value" % var, fn)
return _ssierr
vars[var] = val
return _ssiok
elif cmd == b"echo":
if val is not None:
e("SSI get(%s) with value" % var, fn)
if not var in vars:
e("SSI get(%s) without set" % var, fn)
return _ssierr
return vars[var]
else:
e("SSI unknown command(%s)" % cmd, fn)
return _ssierr
def _slurp(path):
with open(path, 'rb') as f:
return f.read()
def InlineIncludes(path, errorfn):
"""Read a file, expanding <!-- #include --> statements."""
content = _slurp(path)
vars = {}
content = re.sub(br'<!-- *#include *virtual=[\'"]([^\'"]+)[\'"] *-->\s*',
lambda x: _slurp(x.group(1)),
content)
content = re.sub(br'<!-- *#(set|echo) *var=[\'"]([^\'"]+)[\'"](?: *value=[\'"]([^\'"]+)[\'"])? *-->\s*',
lambda x: _dovar(vars, x, errorfn, path),
content)
return content
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