/usr/share/pyshared/uritemplate/uritemplate.py is in python-uritemplate 0.5.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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"""
URI Template (RFC6570) Processor
"""
__copyright__ = """\
Copyright 2011-2012 Joe Gregorio
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
"""
import re
from urllib import quote
RESERVED = ":/?#[]@!$&'()*+,;="
OPERATOR = "+#./;?&|!@"
MODIFIER = ":^"
TEMPLATE = re.compile("{([^\}]+)}")
def _quote(value, safe, prefix=None):
if prefix != None:
return quote(str(value)[:prefix], safe)
else:
return quote(str(value), safe)
def _tostring(varname, value, explode, prefix, operator, safe=""):
if type(value) == type([]):
return ",".join([_quote(x, safe) for x in value])
if type(value) == type({}):
keys = value.keys()
keys.sort()
if explode:
return ",".join([_quote(key, safe) + "=" + \
_quote(value[key], safe) for key in keys])
else:
return ",".join([_quote(key, safe) + "," + \
_quote(value[key], safe) for key in keys])
elif value == None:
return
else:
return _quote(value, safe, prefix)
def _tostring_path(varname, value, explode, prefix, operator, safe=""):
joiner = operator
if type(value) == type([]):
if explode:
out = [_quote(x, safe) for x in value if value != None]
else:
joiner = ","
out = [_quote(x, safe) for x in value if value != None]
if out:
return joiner.join(out)
else:
return
elif type(value) == type({}):
keys = value.keys()
keys.sort()
if explode:
out = [_quote(key, safe) + "=" + \
_quote(value[key], safe) for key in keys \
if value[key] != None]
else:
joiner = ","
out = [_quote(key, safe) + "," + \
_quote(value[key], safe) \
for key in keys if value[key] != None]
if out:
return joiner.join(out)
else:
return
elif value == None:
return
else:
return _quote(value, safe, prefix)
def _tostring_semi(varname, value, explode, prefix, operator, safe=""):
joiner = operator
if operator == "?":
joiner = "&"
if type(value) == type([]):
if explode:
out = [varname + "=" + _quote(x, safe) \
for x in value if x != None]
if out:
return joiner.join(out)
else:
return
else:
return varname + "=" + ",".join([_quote(x, safe) \
for x in value])
elif type(value) == type({}):
keys = value.keys()
keys.sort()
if explode:
return joiner.join([_quote(key, safe) + "=" + \
_quote(value[key], safe) \
for key in keys if key != None])
else:
return varname + "=" + ",".join([_quote(key, safe) + "," + \
_quote(value[key], safe) for key in keys \
if key != None])
else:
if value == None:
return
elif value:
return (varname + "=" + _quote(value, safe, prefix))
else:
return varname
def _tostring_query(varname, value, explode, prefix, operator, safe=""):
joiner = operator
if operator in ["?", "&"]:
joiner = "&"
if type(value) == type([]):
if 0 == len(value):
return None
if explode:
return joiner.join([varname + "=" + _quote(x, safe) \
for x in value])
else:
return (varname + "=" + ",".join([_quote(x, safe) \
for x in value]))
elif type(value) == type({}):
if 0 == len(value):
return None
keys = value.keys()
keys.sort()
if explode:
return joiner.join([_quote(key, safe) + "=" + \
_quote(value[key], safe) \
for key in keys])
else:
return varname + "=" + \
",".join([_quote(key, safe) + "," + \
_quote(value[key], safe) for key in keys])
else:
if value == None:
return
elif value:
return (varname + "=" + _quote(value, safe, prefix))
else:
return (varname + "=")
TOSTRING = {
"" : _tostring,
"+": _tostring,
"#": _tostring,
";": _tostring_semi,
"?": _tostring_query,
"&": _tostring_query,
"/": _tostring_path,
".": _tostring_path,
}
def expand(template, variables):
"""
Expand template as a URI Template using variables.
"""
def _sub(match):
expression = match.group(1)
operator = ""
if expression[0] in OPERATOR:
operator = expression[0]
varlist = expression[1:]
else:
varlist = expression
safe = ""
if operator in ["+", "#"]:
safe = RESERVED
varspecs = varlist.split(",")
varnames = []
defaults = {}
for varspec in varspecs:
default = None
explode = False
prefix = None
if "=" in varspec:
varname, default = tuple(varspec.split("=", 1))
else:
varname = varspec
if varname[-1] == "*":
explode = True
varname = varname[:-1]
elif ":" in varname:
try:
prefix = int(varname[varname.index(":")+1:])
except ValueError:
raise ValueError, "non-integer prefix '%s'" \
% varname[varname.index(":")+1:]
varname = varname[:varname.index(":")]
if default:
defaults[varname] = default
varnames.append((varname, explode, prefix))
retval = []
joiner = operator
start = operator
if operator == "+":
start = ""
joiner = ","
if operator == "#":
joiner = ","
if operator == "?":
joiner = "&"
if operator == "&":
start = "&"
if operator == "":
joiner = ","
for varname, explode, prefix in varnames:
if varname in variables:
value = variables[varname]
if not value and value != "" and varname in defaults:
value = defaults[varname]
elif varname in defaults:
value = defaults[varname]
else:
continue
expanded = TOSTRING[operator](
varname, value, explode, prefix, operator, safe=safe)
if expanded != None:
retval.append(expanded)
if len(retval) > 0:
return start + joiner.join(retval)
else:
return ""
return TEMPLATE.sub(_sub, template)
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