61
56
if not hasattr(op, '_rest_api_permission'):
62
57
raise Unauthorized()
64
if (op._rest_api_permission not in
65
self.get_permissions(req.user, req.config)):
59
if op._rest_api_permission not in self.get_permissions(req.user):
66
60
raise Unauthorized()
68
def convert_bool(self, value):
69
if value in ('True', 'true', True):
71
elif value in ('False', 'false', False):
76
62
def render(self, req):
77
63
if req.method not in self._allowed_methods:
78
64
raise MethodNotAllowed(allowed=self._allowed_methods)
80
66
if req.method == 'GET':
81
qargs = dict(cgi.parse_qsl(
82
urlparse.urlparse(req.unparsed_uri).query,
84
if 'ivle.op' in qargs:
85
outjson = self._named_operation(req, qargs, readonly=True)
87
self.authorize_method(req, self.GET)
88
outjson = self.GET(req)
67
self.authorize_method(req, self.GET)
68
outjson = self.GET(req)
89
69
# Since PATCH isn't yet an official HTTP method, we allow users to
90
70
# turn a PUT into a PATCH by supplying a special header.
91
71
elif req.method == 'PATCH' or (req.method == 'PUT' and
93
73
req.headers_in['X-IVLE-Patch-Semantics'].lower() == 'yes'):
94
74
self.authorize_method(req, self.PATCH)
96
input = json.loads(req.read())
76
input = cjson.decode(req.read())
77
except cjson.DecodeError:
98
78
raise BadRequest('Invalid JSON data')
99
79
outjson = self.PATCH(req, input)
100
80
elif req.method == 'PUT':
101
81
self.authorize_method(req, self.PUT)
103
input = json.loads(req.read())
83
input = cjson.decode(req.read())
84
except cjson.DecodeError:
105
85
raise BadRequest('Invalid JSON data')
106
86
outjson = self.PUT(req, input)
107
87
# POST implies named operation.
108
88
elif req.method == 'POST':
109
89
# TODO: Check Content-Type and implement multipart/form-data.
111
opargs = dict(cgi.parse_qsl(data, keep_blank_values=1))
112
outjson = self._named_operation(req, opargs)
90
opargs = dict(cgi.parse_qsl(req.read()))
92
opname = opargs['ivle.op']
95
raise BadRequest('No named operation specified.')
98
op = getattr(self, opname)
99
except AttributeError:
100
raise BadRequest('Invalid named operation.')
102
if not hasattr(op, '_rest_api_callable') or \
103
not op._rest_api_callable:
104
raise BadRequest('Invalid named operation.')
106
self.authorize_method(req, op)
108
# Find any missing arguments, except for the first two (self, req)
109
(args, vaargs, varkw, defaults) = inspect.getargspec(op)
112
# To find missing arguments, we eliminate the provided arguments
113
# from the set of remaining function signature arguments. If the
114
# remaining signature arguments are in the args[-len(defaults):],
116
unspec = set(args) - set(opargs.keys())
117
if unspec and not defaults:
118
raise BadRequest('Missing arguments: ' + ', '.join(unspec))
120
unspec = [k for k in unspec if k not in args[-len(defaults):]]
123
raise BadRequest('Missing arguments: ' + ', '.join(unspec))
125
# We have extra arguments if the are no match args in the function
126
# signature, AND there is no **.
127
extra = set(opargs.keys()) - set(args)
128
if extra and not varkw:
129
raise BadRequest('Extra arguments: ' + ', '.join(extra))
131
outjson = op(req, **opargs)
114
133
req.content_type = self.content_type
115
self.write_json(req, outjson)
117
#This is a separate function to allow additional data to be passed through
118
def write_json(self, req, outjson):
119
134
if outjson is not None:
120
req.write(json.dumps(outjson))
135
req.write(cjson.encode(outjson))
123
def _named_operation(self, req, opargs, readonly=False):
125
opname = opargs['ivle.op']
126
del opargs['ivle.op']
128
raise BadRequest('No named operation specified.')
131
op = getattr(self, opname)
132
except AttributeError:
133
raise BadRequest('Invalid named operation.')
135
if not hasattr(op, '_rest_api_callable') or \
136
not op._rest_api_callable:
137
raise BadRequest('Invalid named operation.')
139
if readonly and op._rest_api_write_operation:
140
raise BadRequest('POST required for write operation.')
142
self.authorize_method(req, op)
144
# Find any missing arguments, except for the first two (self, req)
145
(args, vaargs, varkw, defaults) = inspect.getargspec(op)
148
# To find missing arguments, we eliminate the provided arguments
149
# from the set of remaining function signature arguments. If the
150
# remaining signature arguments are in the args[-len(defaults):],
152
unspec = set(args) - set(opargs.keys())
153
if unspec and not defaults:
154
raise BadRequest('Missing arguments: ' + ', '.join(unspec))
156
unspec = [k for k in unspec if k not in args[-len(defaults):]]
159
raise BadRequest('Missing arguments: ' + ', '.join(unspec))
161
# We have extra arguments if the are no match args in the function
162
# signature, AND there is no **.
163
extra = set(opargs.keys()) - set(args)
164
if extra and not varkw:
165
raise BadRequest('Extra arguments: ' + ', '.join(extra))
167
return op(req, **opargs)
170
class XHTMLRESTView(GenshiLoaderMixin, JSONRESTView):
171
"""A special type of RESTView which takes enhances the standard JSON
172
with genshi XHTML functions.
174
XHTMLRESTViews should have a template, which is rendered using their
175
context. This is returned in the JSON as 'html'"""
177
ctx = genshi.template.Context()
179
def render_fragment(self):
180
if self.template is None:
181
raise NotImplementedError()
183
rest_template = os.path.join(os.path.dirname(
184
inspect.getmodule(self).__file__), self.template)
185
tmpl = self._loader.load(rest_template)
187
return tmpl.generate(self.ctx).render('xhtml', doctype='xhtml')
189
# This renders the template and adds it to the json
190
def write_json(self, req, outjson):
191
outjson["html"] = self.render_fragment()
192
req.write(json.dumps(outjson))
195
class _named_operation(object):
138
class named_operation(object):
196
139
'''Declare a function to be accessible to HTTP users via the REST API.
198
def __init__(self, write_operation, permission):
199
self.write_operation = write_operation
141
def __init__(self, permission):
200
142
self.permission = permission
202
144
def __call__(self, func):
203
145
func._rest_api_callable = True
204
func._rest_api_write_operation = self.write_operation
205
146
func._rest_api_permission = self.permission
208
write_operation = functools.partial(_named_operation, True)
209
read_operation = functools.partial(_named_operation, False)
211
149
class require_permission(object):
212
150
'''Declare the permission required for use of a method via the REST API.