root / snf-django-lib / snf_django / lib / api / __init__.py @ 222305b7
History | View | Annotate | Download (7.8 kB)
1 | 72bf812d | Christos Stavrakakis | # Copyright 2012, 2013 GRNET S.A. All rights reserved.
|
---|---|---|---|
2 | 72bf812d | Christos Stavrakakis | #
|
3 | 72bf812d | Christos Stavrakakis | # Redistribution and use in source and binary forms, with or
|
4 | 72bf812d | Christos Stavrakakis | # without modification, are permitted provided that the following
|
5 | 72bf812d | Christos Stavrakakis | # conditions are met:
|
6 | 72bf812d | Christos Stavrakakis | #
|
7 | 72bf812d | Christos Stavrakakis | # 1. Redistributions of source code must retain the above
|
8 | 72bf812d | Christos Stavrakakis | # copyright notice, this list of conditions and the following
|
9 | 72bf812d | Christos Stavrakakis | # disclaimer.
|
10 | 72bf812d | Christos Stavrakakis | #
|
11 | 72bf812d | Christos Stavrakakis | # 2. Redistributions in binary form must reproduce the above
|
12 | 72bf812d | Christos Stavrakakis | # copyright notice, this list of conditions and the following
|
13 | 72bf812d | Christos Stavrakakis | # disclaimer in the documentation and/or other materials
|
14 | 72bf812d | Christos Stavrakakis | # provided with the distribution.
|
15 | 72bf812d | Christos Stavrakakis | #
|
16 | 72bf812d | Christos Stavrakakis | # THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
|
17 | 72bf812d | Christos Stavrakakis | # OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
18 | 72bf812d | Christos Stavrakakis | # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
19 | 72bf812d | Christos Stavrakakis | # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
|
20 | 72bf812d | Christos Stavrakakis | # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
21 | 72bf812d | Christos Stavrakakis | # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
22 | 72bf812d | Christos Stavrakakis | # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
|
23 | 72bf812d | Christos Stavrakakis | # USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
24 | 72bf812d | Christos Stavrakakis | # AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
25 | 72bf812d | Christos Stavrakakis | # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
26 | 72bf812d | Christos Stavrakakis | # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
27 | 72bf812d | Christos Stavrakakis | # POSSIBILITY OF SUCH DAMAGE.
|
28 | 72bf812d | Christos Stavrakakis | #
|
29 | 72bf812d | Christos Stavrakakis | # The views and conclusions contained in the software and
|
30 | 72bf812d | Christos Stavrakakis | # documentation are those of the authors and should not be
|
31 | 72bf812d | Christos Stavrakakis | # interpreted as representing official policies, either expressed
|
32 | 72bf812d | Christos Stavrakakis | # or implied, of GRNET S.A.
|
33 | 72bf812d | Christos Stavrakakis | |
34 | 72bf812d | Christos Stavrakakis | from functools import wraps |
35 | 72bf812d | Christos Stavrakakis | from traceback import format_exc |
36 | 72bf812d | Christos Stavrakakis | from time import time |
37 | 72bf812d | Christos Stavrakakis | from logging import getLogger |
38 | 72bf812d | Christos Stavrakakis | from wsgiref.handlers import format_date_time |
39 | 72bf812d | Christos Stavrakakis | |
40 | 72bf812d | Christos Stavrakakis | from django.http import HttpResponse |
41 | 72bf812d | Christos Stavrakakis | from django.utils import cache |
42 | 72bf812d | Christos Stavrakakis | from django.utils import simplejson as json |
43 | 72bf812d | Christos Stavrakakis | from django.template.loader import render_to_string |
44 | 72bf812d | Christos Stavrakakis | |
45 | 72bf812d | Christos Stavrakakis | from astakosclient import AstakosClient |
46 | 6c1c0738 | Ilias Tsitsimpis | from astakosclient.errors import AstakosClientException |
47 | 72bf812d | Christos Stavrakakis | from django.conf import settings |
48 | 72bf812d | Christos Stavrakakis | from snf_django.lib.api import faults |
49 | 72bf812d | Christos Stavrakakis | |
50 | 72bf812d | Christos Stavrakakis | |
51 | 72bf812d | Christos Stavrakakis | log = getLogger(__name__) |
52 | 72bf812d | Christos Stavrakakis | |
53 | 72bf812d | Christos Stavrakakis | |
54 | 72bf812d | Christos Stavrakakis | def get_token(request): |
55 | 72bf812d | Christos Stavrakakis | """Get the Authentication Token of a request."""
|
56 | 72bf812d | Christos Stavrakakis | token = request.GET.get("X-Auth-Token", None) |
57 | 72bf812d | Christos Stavrakakis | if not token: |
58 | 72bf812d | Christos Stavrakakis | token = request.META.get("HTTP_X_AUTH_TOKEN", None) |
59 | 72bf812d | Christos Stavrakakis | return token
|
60 | 72bf812d | Christos Stavrakakis | |
61 | 72bf812d | Christos Stavrakakis | |
62 | 72bf812d | Christos Stavrakakis | def api_method(http_method=None, token_required=True, user_required=True, |
63 | 47ef53d5 | Christos Stavrakakis | logger=None, format_allowed=True, astakos_url=None): |
64 | 72bf812d | Christos Stavrakakis | """Decorator function for views that implement an API method."""
|
65 | 72bf812d | Christos Stavrakakis | if not logger: |
66 | 72bf812d | Christos Stavrakakis | logger = log |
67 | 72bf812d | Christos Stavrakakis | |
68 | 72bf812d | Christos Stavrakakis | def decorator(func): |
69 | 72bf812d | Christos Stavrakakis | @wraps(func)
|
70 | 72bf812d | Christos Stavrakakis | def wrapper(request, *args, **kwargs): |
71 | 72bf812d | Christos Stavrakakis | try:
|
72 | 72bf812d | Christos Stavrakakis | # Get the requested serialization format
|
73 | 72bf812d | Christos Stavrakakis | request.serialization = get_serialization(request, |
74 | 72bf812d | Christos Stavrakakis | format_allowed) |
75 | 72bf812d | Christos Stavrakakis | |
76 | 72bf812d | Christos Stavrakakis | # Check HTTP method
|
77 | 72bf812d | Christos Stavrakakis | if http_method and request.method != http_method: |
78 | 72bf812d | Christos Stavrakakis | raise faults.BadRequest("Method not allowed") |
79 | 72bf812d | Christos Stavrakakis | |
80 | 72bf812d | Christos Stavrakakis | # Get authentication token
|
81 | 72bf812d | Christos Stavrakakis | request.x_auth_token = None
|
82 | 72bf812d | Christos Stavrakakis | if token_required or user_required: |
83 | 72bf812d | Christos Stavrakakis | token = get_token(request) |
84 | 72bf812d | Christos Stavrakakis | if not token: |
85 | 72bf812d | Christos Stavrakakis | msg = "Access denied. No authentication token"
|
86 | 72bf812d | Christos Stavrakakis | raise faults.Unauthorized(msg)
|
87 | 72bf812d | Christos Stavrakakis | request.x_auth_token = token |
88 | 72bf812d | Christos Stavrakakis | |
89 | 72bf812d | Christos Stavrakakis | # Authenticate
|
90 | 72bf812d | Christos Stavrakakis | if user_required:
|
91 | 72bf812d | Christos Stavrakakis | assert(token_required), "Can not get user without token" |
92 | 47ef53d5 | Christos Stavrakakis | astakos = astakos_url or settings.ASTAKOS_URL
|
93 | 726cb37f | Ilias Tsitsimpis | astakos = AstakosClient(astakos, |
94 | 726cb37f | Ilias Tsitsimpis | use_pool=True,
|
95 | 726cb37f | Ilias Tsitsimpis | logger=logger) |
96 | 726cb37f | Ilias Tsitsimpis | user_info = astakos.get_user_info(token) |
97 | 72bf812d | Christos Stavrakakis | request.user_uniq = user_info["uuid"]
|
98 | 72bf812d | Christos Stavrakakis | request.user = user_info |
99 | 72bf812d | Christos Stavrakakis | |
100 | 72bf812d | Christos Stavrakakis | # Get the response object
|
101 | 72bf812d | Christos Stavrakakis | response = func(request, *args, **kwargs) |
102 | 72bf812d | Christos Stavrakakis | |
103 | 72bf812d | Christos Stavrakakis | # Fill in response variables
|
104 | 72bf812d | Christos Stavrakakis | update_response_headers(request, response) |
105 | 72bf812d | Christos Stavrakakis | return response
|
106 | 72bf812d | Christos Stavrakakis | except faults.Fault, fault:
|
107 | 72bf812d | Christos Stavrakakis | if fault.code >= 500: |
108 | 72bf812d | Christos Stavrakakis | logger.exception("API ERROR")
|
109 | 72bf812d | Christos Stavrakakis | return render_fault(request, fault)
|
110 | 726cb37f | Ilias Tsitsimpis | except AstakosClientException as err: |
111 | 726cb37f | Ilias Tsitsimpis | fault = faults.Fault(message=err.message, |
112 | 726cb37f | Ilias Tsitsimpis | details=err.details, |
113 | 726cb37f | Ilias Tsitsimpis | code=err.status) |
114 | 726cb37f | Ilias Tsitsimpis | if fault.code >= 500: |
115 | 255cef57 | Christos Stavrakakis | logger.exception("Astakos ERROR")
|
116 | 726cb37f | Ilias Tsitsimpis | return render_fault(request, fault)
|
117 | 72bf812d | Christos Stavrakakis | except:
|
118 | 72bf812d | Christos Stavrakakis | logger.exception("Unexpected ERROR")
|
119 | 72bf812d | Christos Stavrakakis | fault = faults.InternalServerError("Unexpected ERROR")
|
120 | 72bf812d | Christos Stavrakakis | return render_fault(request, fault)
|
121 | 72bf812d | Christos Stavrakakis | return wrapper
|
122 | 72bf812d | Christos Stavrakakis | return decorator
|
123 | 72bf812d | Christos Stavrakakis | |
124 | 72bf812d | Christos Stavrakakis | |
125 | 72bf812d | Christos Stavrakakis | def get_serialization(request, format_allowed=True): |
126 | 72bf812d | Christos Stavrakakis | """Return the serialization format requested.
|
127 | 72bf812d | Christos Stavrakakis |
|
128 | 72bf812d | Christos Stavrakakis | Valid formats are 'json' and 'xml' and 'text'
|
129 | 72bf812d | Christos Stavrakakis | """
|
130 | 72bf812d | Christos Stavrakakis | |
131 | 72bf812d | Christos Stavrakakis | if not format_allowed: |
132 | 72bf812d | Christos Stavrakakis | return "text" |
133 | 72bf812d | Christos Stavrakakis | |
134 | 72bf812d | Christos Stavrakakis | # Try to get serialization from 'format' parameter
|
135 | 72bf812d | Christos Stavrakakis | _format = request.GET.get("format")
|
136 | 72bf812d | Christos Stavrakakis | if _format:
|
137 | 72bf812d | Christos Stavrakakis | if _format == "json": |
138 | 72bf812d | Christos Stavrakakis | return "json" |
139 | 72bf812d | Christos Stavrakakis | elif _format == "xml": |
140 | 72bf812d | Christos Stavrakakis | return "xml" |
141 | 72bf812d | Christos Stavrakakis | |
142 | 72bf812d | Christos Stavrakakis | # Try to get serialization from path
|
143 | 72bf812d | Christos Stavrakakis | path = request.path |
144 | 72bf812d | Christos Stavrakakis | if path.endswith(".json"): |
145 | 72bf812d | Christos Stavrakakis | return "json" |
146 | 72bf812d | Christos Stavrakakis | elif path.endswith(".xml"): |
147 | 72bf812d | Christos Stavrakakis | return "xml" |
148 | 72bf812d | Christos Stavrakakis | |
149 | 72bf812d | Christos Stavrakakis | for item in request.META.get("HTTP_ACCEPT", "").split(","): |
150 | 72bf812d | Christos Stavrakakis | accept, sep, rest = item.strip().partition(";")
|
151 | 72bf812d | Christos Stavrakakis | if accept == "application/json": |
152 | 72bf812d | Christos Stavrakakis | return "json" |
153 | 72bf812d | Christos Stavrakakis | elif accept == "applcation/xml": |
154 | 72bf812d | Christos Stavrakakis | return "xml" |
155 | 72bf812d | Christos Stavrakakis | |
156 | 72bf812d | Christos Stavrakakis | return "json" |
157 | 72bf812d | Christos Stavrakakis | |
158 | 72bf812d | Christos Stavrakakis | |
159 | 72bf812d | Christos Stavrakakis | def update_response_headers(request, response): |
160 | b698d39d | Christos Stavrakakis | if not getattr(response, "override_serialization", False): |
161 | 72bf812d | Christos Stavrakakis | serialization = request.serialization |
162 | 72bf812d | Christos Stavrakakis | if serialization == "xml": |
163 | 72bf812d | Christos Stavrakakis | response["Content-Type"] = "application/xml; charset=UTF-8" |
164 | 72bf812d | Christos Stavrakakis | elif serialization == "json": |
165 | 72bf812d | Christos Stavrakakis | response["Content-Type"] = "application/json; charset=UTF-8" |
166 | 72bf812d | Christos Stavrakakis | elif serialization == "text": |
167 | 72bf812d | Christos Stavrakakis | response["Content-Type"] = "text/plain; charset=UTF-8" |
168 | 72bf812d | Christos Stavrakakis | else:
|
169 | 72bf812d | Christos Stavrakakis | raise ValueError("Unknown serialization format '%s'" % |
170 | 72bf812d | Christos Stavrakakis | serialization) |
171 | 72bf812d | Christos Stavrakakis | |
172 | 47ef53d5 | Christos Stavrakakis | if settings.DEBUG or getattr(settings, "TEST", False): |
173 | 72bf812d | Christos Stavrakakis | response["Date"] = format_date_time(time())
|
174 | 72bf812d | Christos Stavrakakis | |
175 | 72bf812d | Christos Stavrakakis | if not response.has_header("Content-Length"): |
176 | 72bf812d | Christos Stavrakakis | response["Content-Length"] = len(response.content) |
177 | 72bf812d | Christos Stavrakakis | |
178 | 72bf812d | Christos Stavrakakis | cache.add_never_cache_headers(response) |
179 | 72bf812d | Christos Stavrakakis | # Fix Vary and Cache-Control Headers. Issue: #3448
|
180 | 72bf812d | Christos Stavrakakis | cache.patch_vary_headers(response, ('X-Auth-Token',))
|
181 | 72bf812d | Christos Stavrakakis | cache.patch_cache_control(response, no_cache=True, no_store=True, |
182 | 72bf812d | Christos Stavrakakis | must_revalidate=True)
|
183 | 72bf812d | Christos Stavrakakis | |
184 | 72bf812d | Christos Stavrakakis | |
185 | 72bf812d | Christos Stavrakakis | def render_fault(request, fault): |
186 | 72bf812d | Christos Stavrakakis | """Render an API fault to an HTTP response."""
|
187 | 72bf812d | Christos Stavrakakis | # If running in debug mode add exception information to fault details
|
188 | 47ef53d5 | Christos Stavrakakis | if settings.DEBUG or getattr(settings, "TEST", False): |
189 | 72bf812d | Christos Stavrakakis | fault.details = format_exc() |
190 | 72bf812d | Christos Stavrakakis | |
191 | 72bf812d | Christos Stavrakakis | try:
|
192 | 72bf812d | Christos Stavrakakis | serialization = request.serialization |
193 | 72bf812d | Christos Stavrakakis | except AttributeError: |
194 | 72bf812d | Christos Stavrakakis | request.serialization = "json"
|
195 | 72bf812d | Christos Stavrakakis | serialization = "json"
|
196 | 72bf812d | Christos Stavrakakis | |
197 | 72bf812d | Christos Stavrakakis | # Serialize the fault data to xml or json
|
198 | 72bf812d | Christos Stavrakakis | if serialization == "xml": |
199 | 72bf812d | Christos Stavrakakis | data = render_to_string("fault.xml", {"fault": fault}) |
200 | 72bf812d | Christos Stavrakakis | else:
|
201 | 72bf812d | Christos Stavrakakis | d = {fault.name: {"code": fault.code,
|
202 | 72bf812d | Christos Stavrakakis | "message": fault.message,
|
203 | 93c6900c | Ilias Tsitsimpis | "details": fault.details}}
|
204 | 72bf812d | Christos Stavrakakis | data = json.dumps(d) |
205 | 72bf812d | Christos Stavrakakis | |
206 | 72bf812d | Christos Stavrakakis | response = HttpResponse(data, status=fault.code) |
207 | 72bf812d | Christos Stavrakakis | update_response_headers(request, response) |
208 | 72bf812d | Christos Stavrakakis | return response
|
209 | 72bf812d | Christos Stavrakakis | |
210 | 72bf812d | Christos Stavrakakis | |
211 | 72bf812d | Christos Stavrakakis | def not_found(request): |
212 | 72bf812d | Christos Stavrakakis | raise faults.BadRequest('Not found.') |
213 | 72bf812d | Christos Stavrakakis | |
214 | 72bf812d | Christos Stavrakakis | |
215 | 72bf812d | Christos Stavrakakis | def method_not_allowed(request): |
216 | 72bf812d | Christos Stavrakakis | raise faults.BadRequest('Method not allowed') |