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from __future__ import absolute_import
import datetime
import six
import xml.etree.ElementTree as et
from simplegeneric import generic
import wsme.types
from wsme.exc import UnknownArgument, InvalidInput
import re
content_type = 'text/xml'
accept_content_types = [
content_type,
]
time_re = re.compile(r'(?P<h>[0-2][0-9]):(?P<m>[0-5][0-9]):(?P<s>[0-6][0-9])')
def xml_indent(elem, level=0):
i = "\n" + level * " "
if len(elem):
if not elem.text or not elem.text.strip():
elem.text = i + " "
for e in elem:
xml_indent(e, level + 1)
if not e.tail or not e.tail.strip():
e.tail = i
if level and (not elem.tail or not elem.tail.strip()):
elem.tail = i
@generic
def toxml(datatype, key, value):
"""
A generic converter from python to xml elements.
If a non-complex user specific type is to be used in the api,
a specific toxml should be added::
from wsme.protocol.restxml import toxml
myspecialtype = object()
@toxml.when_object(myspecialtype)
def myspecialtype_toxml(datatype, key, value):
el = et.Element(key)
if value is None:
el.set('nil', 'true')
else:
el.text = str(value)
return el
"""
el = et.Element(key)
if value is None:
el.set('nil', 'true')
else:
if wsme.types.isusertype(datatype):
return toxml(datatype.basetype,
key, datatype.tobasetype(value))
elif wsme.types.iscomplex(datatype):
for attrdef in datatype._wsme_attributes:
attrvalue = getattr(value, attrdef.key)
if attrvalue is not wsme.types.Unset:
el.append(toxml(attrdef.datatype, attrdef.name,
attrvalue))
else:
el.text = six.text_type(value)
return el
@generic
def fromxml(datatype, element):
"""
A generic converter from xml elements to python datatype.
If a non-complex user specific type is to be used in the api,
a specific fromxml should be added::
from wsme.protocol.restxml import fromxml
class MySpecialType(object):
pass
@fromxml.when_object(MySpecialType)
def myspecialtype_fromxml(datatype, element):
if element.get('nil', False):
return None
return MySpecialType(element.text)
"""
if element.get('nil', False):
return None
if wsme.types.isusertype(datatype):
return datatype.frombasetype(fromxml(datatype.basetype, element))
if wsme.types.iscomplex(datatype):
obj = datatype()
for attrdef in wsme.types.list_attributes(datatype):
sub = element.find(attrdef.name)
if sub is not None:
val_fromxml = fromxml(attrdef.datatype, sub)
if getattr(attrdef, 'readonly', False):
raise InvalidInput(attrdef.name, val_fromxml,
"Cannot set read only field.")
setattr(obj, attrdef.key, val_fromxml)
elif attrdef.mandatory:
raise InvalidInput(attrdef.name, None,
"Mandatory field missing.")
return wsme.types.validate_value(datatype, obj)
if datatype is wsme.types.bytes:
return element.text.encode('ascii')
return datatype(element.text)
@toxml.when_type(wsme.types.ArrayType)
def array_toxml(datatype, key, value):
el = et.Element(key)
if value is None:
el.set('nil', 'true')
else:
for item in value:
el.append(toxml(datatype.item_type, 'item', item))
return el
@toxml.when_type(wsme.types.DictType)
def dict_toxml(datatype, key, value):
el = et.Element(key)
if value is None:
el.set('nil', 'true')
else:
for item in value.items():
key = toxml(datatype.key_type, 'key', item[0])
value = toxml(datatype.value_type, 'value', item[1])
node = et.Element('item')
node.append(key)
node.append(value)
el.append(node)
return el
@toxml.when_object(wsme.types.bytes)
def bytes_toxml(datatype, key, value):
el = et.Element(key)
if value is None:
el.set('nil', 'true')
else:
el.text = value.decode('ascii')
return el
@toxml.when_object(bool)
def bool_toxml(datatype, key, value):
el = et.Element(key)
if value is None:
el.set('nil', 'true')
else:
el.text = value and 'true' or 'false'
return el
@toxml.when_object(datetime.date)
def date_toxml(datatype, key, value):
el = et.Element(key)
if value is None:
el.set('nil', 'true')
else:
el.text = value.isoformat()
return el
@toxml.when_object(datetime.datetime)
def datetime_toxml(datatype, key, value):
el = et.Element(key)
if value is None:
el.set('nil', 'true')
else:
el.text = value.isoformat()
return el
@fromxml.when_type(wsme.types.ArrayType)
def array_fromxml(datatype, element):
if element.get('nil') == 'true':
return None
return [
fromxml(datatype.item_type, item)
for item in element.findall('item')
]
@fromxml.when_object(bool)
def bool_fromxml(datatype, element):
if element.get('nil') == 'true':
return None
return element.text.lower() != 'false'
@fromxml.when_type(wsme.types.DictType)
def dict_fromxml(datatype, element):
if element.get('nil') == 'true':
return None
return dict((
(fromxml(datatype.key_type, item.find('key')),
fromxml(datatype.value_type, item.find('value')))
for item in element.findall('item')))
@fromxml.when_object(wsme.types.text)
def unicode_fromxml(datatype, element):
if element.get('nil') == 'true':
return None
return wsme.types.text(element.text) if element.text else six.u('')
@fromxml.when_object(datetime.date)
def date_fromxml(datatype, element):
if element.get('nil') == 'true':
return None
return wsme.utils.parse_isodate(element.text)
@fromxml.when_object(datetime.time)
def time_fromxml(datatype, element):
if element.get('nil') == 'true':
return None
return wsme.utils.parse_isotime(element.text)
@fromxml.when_object(datetime.datetime)
def datetime_fromxml(datatype, element):
if element.get('nil') == 'true':
return None
return wsme.utils.parse_isodatetime(element.text)
def parse(s, datatypes, bodyarg):
if hasattr(s, 'read'):
tree = et.parse(s)
else:
tree = et.fromstring(s)
if bodyarg:
name = list(datatypes.keys())[0]
return {name: fromxml(datatypes[name], tree)}
else:
kw = {}
extra_args = []
for sub in tree:
if sub.tag not in datatypes:
extra_args.append(sub.tag)
kw[sub.tag] = fromxml(datatypes[sub.tag], sub)
if extra_args:
raise UnknownArgument(', '.join(extra_args))
return kw
def encode_result(value, datatype, **options):
return et.tostring(toxml(
datatype, options.get('nested_result_attrname', 'result'), value
))
def encode_error(context, errordetail):
el = et.Element('error')
et.SubElement(el, 'faultcode').text = errordetail['faultcode']
et.SubElement(el, 'faultstring').text = errordetail['faultstring']
if 'debuginfo' in errordetail:
et.SubElement(el, 'debuginfo').text = errordetail['debuginfo']
return et.tostring(el)
def encode_sample_value(datatype, value, format=False):
r = toxml(datatype, 'value', value)
if format:
xml_indent(r)
content = et.tostring(r)
return ('xml', content)
def encode_sample_params(params, format=False):
node = et.Element('parameters')
for name, datatype, value in params:
node.append(toxml(datatype, name, value))
if format:
xml_indent(node)
content = et.tostring(node)
return ('xml', content)
def encode_sample_result(datatype, value, format=False):
r = toxml(datatype, 'result', value)
if format:
xml_indent(r)
content = et.tostring(r)
return ('xml', content)
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