root / snf-pithos-app / pithos / api / util.py @ fda50d75
History | View | Annotate | Download (45.2 kB)
1 |
# Copyright 2011-2013 GRNET S.A. All rights reserved.
|
---|---|
2 |
#
|
3 |
# Redistribution and use in source and binary forms, with or
|
4 |
# without modification, are permitted provided that the following
|
5 |
# conditions are met:
|
6 |
#
|
7 |
# 1. Redistributions of source code must retain the above
|
8 |
# copyright notice, this list of conditions and the following
|
9 |
# disclaimer.
|
10 |
#
|
11 |
# 2. Redistributions in binary form must reproduce the above
|
12 |
# copyright notice, this list of conditions and the following
|
13 |
# disclaimer in the documentation and/or other materials
|
14 |
# provided with the distribution.
|
15 |
#
|
16 |
# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
|
17 |
# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
18 |
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
19 |
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
|
20 |
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
21 |
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
22 |
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
|
23 |
# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
24 |
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
25 |
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
26 |
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
27 |
# POSSIBILITY OF SUCH DAMAGE.
|
28 |
#
|
29 |
# The views and conclusions contained in the software and
|
30 |
# documentation are those of the authors and should not be
|
31 |
# interpreted as representing official policies, either expressed
|
32 |
# or implied, of GRNET S.A.
|
33 |
|
34 |
from functools import wraps |
35 |
from datetime import datetime |
36 |
from urllib import quote, unquote, urlencode |
37 |
|
38 |
from django.http import (HttpResponse, Http404, HttpResponseRedirect, |
39 |
HttpResponseNotAllowed) |
40 |
from django.template.loader import render_to_string |
41 |
from django.utils import simplejson as json |
42 |
from django.utils.http import http_date, parse_etags |
43 |
from django.utils.encoding import smart_unicode, smart_str |
44 |
from django.core.files.uploadhandler import FileUploadHandler |
45 |
from django.core.files.uploadedfile import UploadedFile |
46 |
from django.core.urlresolvers import reverse |
47 |
from django.core.exceptions import PermissionDenied |
48 |
|
49 |
from snf_django.lib.api.parsedate import parse_http_date_safe, parse_http_date |
50 |
from snf_django.lib import api |
51 |
from snf_django.lib.api import faults, utils |
52 |
|
53 |
from pithos.api.settings import (BACKEND_DB_MODULE, BACKEND_DB_CONNECTION, |
54 |
BACKEND_BLOCK_MODULE, BACKEND_BLOCK_PATH, |
55 |
BACKEND_BLOCK_UMASK, |
56 |
BACKEND_QUEUE_MODULE, BACKEND_QUEUE_HOSTS, |
57 |
BACKEND_QUEUE_EXCHANGE, |
58 |
ASTAKOSCLIENT_POOLSIZE, |
59 |
SERVICE_TOKEN, |
60 |
ASTAKOS_AUTH_URL, |
61 |
BACKEND_ACCOUNT_QUOTA, |
62 |
BACKEND_CONTAINER_QUOTA, |
63 |
BACKEND_VERSIONING, BACKEND_FREE_VERSIONING, |
64 |
BACKEND_POOL_ENABLED, BACKEND_POOL_SIZE, |
65 |
BACKEND_BLOCK_SIZE, BACKEND_HASH_ALGORITHM, |
66 |
RADOS_STORAGE, RADOS_POOL_BLOCKS, |
67 |
RADOS_POOL_MAPS, TRANSLATE_UUIDS, |
68 |
PUBLIC_URL_SECURITY, PUBLIC_URL_ALPHABET, |
69 |
BASE_HOST, UPDATE_MD5, VIEW_PREFIX, |
70 |
OAUTH2_CLIENT_CREDENTIALS, UNSAFE_DOMAIN) |
71 |
|
72 |
from pithos.api.resources import resources |
73 |
from pithos.backends import connect_backend |
74 |
from pithos.backends.base import (NotAllowedError, QuotaError, ItemNotExists, |
75 |
VersionNotExists) |
76 |
|
77 |
from synnefo.lib import join_urls |
78 |
from synnefo.util import text |
79 |
|
80 |
from astakosclient import AstakosClient |
81 |
from astakosclient.errors import NoUserName, NoUUID, AstakosClientException |
82 |
|
83 |
import logging |
84 |
import re |
85 |
import hashlib |
86 |
import uuid |
87 |
import decimal |
88 |
|
89 |
logger = logging.getLogger(__name__) |
90 |
|
91 |
|
92 |
def json_encode_decimal(obj): |
93 |
if isinstance(obj, decimal.Decimal): |
94 |
return str(obj) |
95 |
raise TypeError(repr(obj) + " is not JSON serializable") |
96 |
|
97 |
|
98 |
def rename_meta_key(d, old, new): |
99 |
if old not in d: |
100 |
return
|
101 |
d[new] = d[old] |
102 |
del(d[old])
|
103 |
|
104 |
|
105 |
def printable_header_dict(d): |
106 |
"""Format a meta dictionary for printing out json/xml.
|
107 |
|
108 |
Convert all keys to lower case and replace dashes with underscores.
|
109 |
Format 'last_modified' timestamp.
|
110 |
"""
|
111 |
|
112 |
timestamps = ('last_modified', 'x_container_until_timestamp', |
113 |
'x_acount_until_timestamp')
|
114 |
for timestamp in timestamps: |
115 |
if timestamp in d and d[timestamp]: |
116 |
d[timestamp] = utils.isoformat( |
117 |
datetime.fromtimestamp(d[timestamp])) |
118 |
return dict([(k.lower().replace('-', '_'), v) for k, v in d.iteritems()]) |
119 |
|
120 |
|
121 |
def format_header_key(k): |
122 |
"""Convert underscores to dashes and capitalize intra-dash strings."""
|
123 |
return '-'.join([x.capitalize() for x in k.replace('_', '-').split('-')]) |
124 |
|
125 |
|
126 |
def get_header_prefix(request, prefix): |
127 |
"""Get all prefix-* request headers in a dict.
|
128 |
Reformat keys with format_header_key()."""
|
129 |
|
130 |
prefix = 'HTTP_' + prefix.upper().replace('-', '_') |
131 |
# TODO: Document or remove '~' replacing.
|
132 |
return dict([(format_header_key(k[5:]), v.replace('~', '')) |
133 |
for k, v in request.META.iteritems() |
134 |
if k.startswith(prefix) and len(k) > len(prefix)]) |
135 |
|
136 |
|
137 |
def check_meta_headers(meta): |
138 |
if len(meta) > 90: |
139 |
raise faults.BadRequest('Too many headers.') |
140 |
for k, v in meta.iteritems(): |
141 |
if len(k) > 128: |
142 |
raise faults.BadRequest('Header name too large.') |
143 |
if len(v) > 256: |
144 |
raise faults.BadRequest('Header value too large.') |
145 |
|
146 |
|
147 |
def get_account_headers(request): |
148 |
meta = get_header_prefix(request, 'X-Account-Meta-')
|
149 |
check_meta_headers(meta) |
150 |
groups = {} |
151 |
for k, v in get_header_prefix(request, 'X-Account-Group-').iteritems(): |
152 |
n = k[16:].lower()
|
153 |
if '-' in n or '_' in n: |
154 |
raise faults.BadRequest('Bad characters in group name') |
155 |
groups[n] = v.replace(' ', '').split(',') |
156 |
while '' in groups[n]: |
157 |
groups[n].remove('')
|
158 |
return meta, groups
|
159 |
|
160 |
|
161 |
def put_account_headers(response, meta, groups, policy): |
162 |
if 'count' in meta: |
163 |
response['X-Account-Container-Count'] = meta['count'] |
164 |
if 'bytes' in meta: |
165 |
response['X-Account-Bytes-Used'] = meta['bytes'] |
166 |
response['Last-Modified'] = http_date(int(meta['modified'])) |
167 |
for k in [x for x in meta.keys() if x.startswith('X-Account-Meta-')]: |
168 |
response[smart_str( |
169 |
k, strings_only=True)] = smart_str(meta[k], strings_only=True) |
170 |
if 'until_timestamp' in meta: |
171 |
response['X-Account-Until-Timestamp'] = http_date(
|
172 |
int(meta['until_timestamp'])) |
173 |
for k, v in groups.iteritems(): |
174 |
k = smart_str(k, strings_only=True)
|
175 |
k = format_header_key('X-Account-Group-' + k)
|
176 |
v = smart_str(','.join(v), strings_only=True) |
177 |
response[k] = v |
178 |
for k, v in policy.iteritems(): |
179 |
response[smart_str(format_header_key('X-Account-Policy-' + k),
|
180 |
strings_only=True)] = smart_str(v, strings_only=True) |
181 |
|
182 |
|
183 |
def get_container_headers(request): |
184 |
meta = get_header_prefix(request, 'X-Container-Meta-')
|
185 |
check_meta_headers(meta) |
186 |
policy = dict([(k[19:].lower(), v.replace(' ', '')) for k, v in |
187 |
get_header_prefix(request, |
188 |
'X-Container-Policy-').iteritems()])
|
189 |
return meta, policy
|
190 |
|
191 |
|
192 |
def put_container_headers(request, response, meta, policy): |
193 |
if 'count' in meta: |
194 |
response['X-Container-Object-Count'] = meta['count'] |
195 |
if 'bytes' in meta: |
196 |
response['X-Container-Bytes-Used'] = meta['bytes'] |
197 |
response['Last-Modified'] = http_date(int(meta['modified'])) |
198 |
for k in [x for x in meta.keys() if x.startswith('X-Container-Meta-')]: |
199 |
response[smart_str( |
200 |
k, strings_only=True)] = smart_str(meta[k], strings_only=True) |
201 |
l = [smart_str(x, strings_only=True) for x in meta['object_meta'] |
202 |
if x.startswith('X-Object-Meta-')] |
203 |
response['X-Container-Object-Meta'] = ','.join([x[14:] for x in l]) |
204 |
response['X-Container-Block-Size'] = request.backend.block_size
|
205 |
response['X-Container-Block-Hash'] = request.backend.hash_algorithm
|
206 |
if 'until_timestamp' in meta: |
207 |
response['X-Container-Until-Timestamp'] = http_date(
|
208 |
int(meta['until_timestamp'])) |
209 |
for k, v in policy.iteritems(): |
210 |
response[smart_str(format_header_key('X-Container-Policy-' + k),
|
211 |
strings_only=True)] = smart_str(v,
|
212 |
strings_only=True)
|
213 |
|
214 |
|
215 |
def get_object_headers(request): |
216 |
content_type = request.META.get('CONTENT_TYPE', None) |
217 |
meta = get_header_prefix(request, 'X-Object-Meta-')
|
218 |
check_meta_headers(meta) |
219 |
if request.META.get('HTTP_CONTENT_ENCODING'): |
220 |
meta['Content-Encoding'] = request.META['HTTP_CONTENT_ENCODING'] |
221 |
if request.META.get('HTTP_CONTENT_DISPOSITION'): |
222 |
meta['Content-Disposition'] = request.META['HTTP_CONTENT_DISPOSITION'] |
223 |
if request.META.get('HTTP_X_OBJECT_MANIFEST'): |
224 |
meta['X-Object-Manifest'] = request.META['HTTP_X_OBJECT_MANIFEST'] |
225 |
return content_type, meta, get_sharing(request), get_public(request)
|
226 |
|
227 |
|
228 |
def put_object_headers(response, meta, restricted=False, token=None): |
229 |
response['ETag'] = meta['hash'] if not UPDATE_MD5 else meta['checksum'] |
230 |
response['Content-Length'] = meta['bytes'] |
231 |
response.override_serialization = True
|
232 |
response['Content-Type'] = meta.get('type', 'application/octet-stream') |
233 |
response['Last-Modified'] = http_date(int(meta['modified'])) |
234 |
if not restricted: |
235 |
response['X-Object-Hash'] = meta['hash'] |
236 |
response['X-Object-UUID'] = meta['uuid'] |
237 |
if TRANSLATE_UUIDS:
|
238 |
meta['modified_by'] = \
|
239 |
retrieve_displayname(token, meta['modified_by'])
|
240 |
response['X-Object-Modified-By'] = smart_str(
|
241 |
meta['modified_by'], strings_only=True) |
242 |
response['X-Object-Version'] = meta['version'] |
243 |
response['X-Object-Version-Timestamp'] = http_date(
|
244 |
int(meta['version_timestamp'])) |
245 |
for k in [x for x in meta.keys() if x.startswith('X-Object-Meta-')]: |
246 |
response[smart_str( |
247 |
k, strings_only=True)] = smart_str(meta[k], strings_only=True) |
248 |
for k in ( |
249 |
'Content-Encoding', 'Content-Disposition', 'X-Object-Manifest', |
250 |
'X-Object-Sharing', 'X-Object-Shared-By', 'X-Object-Allowed-To', |
251 |
'X-Object-Public'):
|
252 |
if k in meta: |
253 |
response[k] = smart_str(meta[k], strings_only=True)
|
254 |
else:
|
255 |
for k in ('Content-Encoding', 'Content-Disposition'): |
256 |
if k in meta: |
257 |
response[k] = smart_str(meta[k], strings_only=True)
|
258 |
|
259 |
|
260 |
def update_manifest_meta(request, v_account, meta): |
261 |
"""Update metadata if the object has an X-Object-Manifest."""
|
262 |
|
263 |
if 'X-Object-Manifest' in meta: |
264 |
etag = ''
|
265 |
bytes = 0
|
266 |
try:
|
267 |
src_container, src_name = split_container_object_string( |
268 |
'/' + meta['X-Object-Manifest']) |
269 |
objects = request.backend.list_objects( |
270 |
request.user_uniq, v_account, |
271 |
src_container, prefix=src_name, virtual=False)
|
272 |
for x in objects: |
273 |
src_meta = request.backend.get_object_meta( |
274 |
request.user_uniq, v_account, src_container, x[0],
|
275 |
'pithos', x[1]) |
276 |
etag += (src_meta['hash'] if not UPDATE_MD5 else |
277 |
src_meta['checksum'])
|
278 |
bytes += src_meta['bytes'] |
279 |
except:
|
280 |
# Ignore errors.
|
281 |
return
|
282 |
meta['bytes'] = bytes |
283 |
md5 = hashlib.md5() |
284 |
md5.update(etag) |
285 |
meta['checksum'] = md5.hexdigest().lower()
|
286 |
|
287 |
|
288 |
def is_uuid(str): |
289 |
if str is None: |
290 |
return False |
291 |
try:
|
292 |
uuid.UUID(str)
|
293 |
except ValueError: |
294 |
return False |
295 |
else:
|
296 |
return True |
297 |
|
298 |
|
299 |
##########################
|
300 |
# USER CATALOG utilities #
|
301 |
##########################
|
302 |
|
303 |
def retrieve_displayname(token, uuid, fail_silently=True): |
304 |
astakos = AstakosClient(token, ASTAKOS_AUTH_URL, |
305 |
retry=2, use_pool=True, |
306 |
logger=logger) |
307 |
try:
|
308 |
displayname = astakos.get_username(uuid) |
309 |
except NoUserName:
|
310 |
if not fail_silently: |
311 |
raise ItemNotExists(uuid)
|
312 |
else:
|
313 |
# just return the uuid
|
314 |
return uuid
|
315 |
return displayname
|
316 |
|
317 |
|
318 |
def retrieve_displaynames(token, uuids, return_dict=False, fail_silently=True): |
319 |
astakos = AstakosClient(token, ASTAKOS_AUTH_URL, |
320 |
retry=2, use_pool=True, |
321 |
logger=logger) |
322 |
catalog = astakos.get_usernames(uuids) or {}
|
323 |
missing = list(set(uuids) - set(catalog)) |
324 |
if missing and not fail_silently: |
325 |
raise ItemNotExists('Unknown displaynames: %s' % ', '.join(missing)) |
326 |
return catalog if return_dict else [catalog.get(i) for i in uuids] |
327 |
|
328 |
|
329 |
def retrieve_uuid(token, displayname): |
330 |
if is_uuid(displayname):
|
331 |
return displayname
|
332 |
|
333 |
astakos = AstakosClient(token, ASTAKOS_AUTH_URL, |
334 |
retry=2, use_pool=True, |
335 |
logger=logger) |
336 |
try:
|
337 |
uuid = astakos.get_uuid(displayname) |
338 |
except NoUUID:
|
339 |
raise ItemNotExists(displayname)
|
340 |
return uuid
|
341 |
|
342 |
|
343 |
def retrieve_uuids(token, displaynames, return_dict=False, fail_silently=True): |
344 |
astakos = AstakosClient(token, ASTAKOS_AUTH_URL, |
345 |
retry=2, use_pool=True, |
346 |
logger=logger) |
347 |
catalog = astakos.get_uuids(displaynames) or {}
|
348 |
missing = list(set(displaynames) - set(catalog)) |
349 |
if missing and not fail_silently: |
350 |
raise ItemNotExists('Unknown uuids: %s' % ', '.join(missing)) |
351 |
return catalog if return_dict else [catalog.get(i) for i in displaynames] |
352 |
|
353 |
|
354 |
def replace_permissions_displayname(token, holder): |
355 |
if holder == '*': |
356 |
return holder
|
357 |
try:
|
358 |
# check first for a group permission
|
359 |
account, group = holder.split(':', 1) |
360 |
except ValueError: |
361 |
return retrieve_uuid(token, holder)
|
362 |
else:
|
363 |
return ':'.join([retrieve_uuid(token, account), group]) |
364 |
|
365 |
|
366 |
def replace_permissions_uuid(token, holder): |
367 |
if holder == '*': |
368 |
return holder
|
369 |
try:
|
370 |
# check first for a group permission
|
371 |
account, group = holder.split(':', 1) |
372 |
except ValueError: |
373 |
return retrieve_displayname(token, holder)
|
374 |
else:
|
375 |
return ':'.join([retrieve_displayname(token, account), group]) |
376 |
|
377 |
|
378 |
def update_sharing_meta(request, permissions, v_account, |
379 |
v_container, v_object, meta): |
380 |
if permissions is None: |
381 |
return
|
382 |
allowed, perm_path, perms = permissions |
383 |
if len(perms) == 0: |
384 |
return
|
385 |
|
386 |
# replace uuid with displayname
|
387 |
if TRANSLATE_UUIDS:
|
388 |
perms['read'] = [replace_permissions_uuid(
|
389 |
getattr(request, 'token', None), x) |
390 |
for x in perms.get('read', [])] |
391 |
perms['write'] = [replace_permissions_uuid(
|
392 |
getattr(request, 'token', None), x) |
393 |
for x in perms.get('write', [])] |
394 |
|
395 |
ret = [] |
396 |
|
397 |
r = ','.join(perms.get('read', [])) |
398 |
if r:
|
399 |
ret.append('read=' + r)
|
400 |
w = ','.join(perms.get('write', [])) |
401 |
if w:
|
402 |
ret.append('write=' + w)
|
403 |
meta['X-Object-Sharing'] = '; '.join(ret) |
404 |
if '/'.join((v_account, v_container, v_object)) != perm_path: |
405 |
meta['X-Object-Shared-By'] = perm_path
|
406 |
if request.user_uniq != v_account:
|
407 |
meta['X-Object-Allowed-To'] = allowed
|
408 |
|
409 |
|
410 |
def update_public_meta(public, meta): |
411 |
if not public: |
412 |
return
|
413 |
meta['X-Object-Public'] = join_urls(
|
414 |
BASE_HOST, reverse('pithos.api.public.public_demux', args=(public,)))
|
415 |
|
416 |
|
417 |
def validate_modification_preconditions(request, meta): |
418 |
"""Check the modified timestamp conforms with the preconditions set."""
|
419 |
|
420 |
if 'modified' not in meta: |
421 |
return # TODO: Always return? |
422 |
|
423 |
if_modified_since = request.META.get('HTTP_IF_MODIFIED_SINCE')
|
424 |
if if_modified_since is not None: |
425 |
if_modified_since = parse_http_date_safe(if_modified_since) |
426 |
if (if_modified_since is not None |
427 |
and int(meta['modified']) <= if_modified_since): |
428 |
raise faults.NotModified('Resource has not been modified') |
429 |
|
430 |
if_unmodified_since = request.META.get('HTTP_IF_UNMODIFIED_SINCE')
|
431 |
if if_unmodified_since is not None: |
432 |
if_unmodified_since = parse_http_date_safe(if_unmodified_since) |
433 |
if (if_unmodified_since is not None |
434 |
and int(meta['modified']) > if_unmodified_since): |
435 |
raise faults.PreconditionFailed('Resource has been modified') |
436 |
|
437 |
|
438 |
def validate_matching_preconditions(request, meta): |
439 |
"""Check that the ETag conforms with the preconditions set."""
|
440 |
|
441 |
etag = meta['hash'] if not UPDATE_MD5 else meta['checksum'] |
442 |
if not etag: |
443 |
etag = None
|
444 |
|
445 |
if_match = request.META.get('HTTP_IF_MATCH')
|
446 |
if if_match is not None: |
447 |
if etag is None: |
448 |
raise faults.PreconditionFailed('Resource does not exist') |
449 |
if (if_match != '*' |
450 |
and etag not in [x.lower() for x in parse_etags(if_match)]): |
451 |
raise faults.PreconditionFailed('Resource ETag does not match') |
452 |
|
453 |
if_none_match = request.META.get('HTTP_IF_NONE_MATCH')
|
454 |
if if_none_match is not None: |
455 |
# TODO: If this passes, must ignore If-Modified-Since header.
|
456 |
if etag is not None: |
457 |
if (if_none_match == '*' or etag in [x.lower() for x in |
458 |
parse_etags(if_none_match)]): |
459 |
# TODO: Continue if an If-Modified-Since header is present.
|
460 |
if request.method in ('HEAD', 'GET'): |
461 |
raise faults.NotModified('Resource ETag matches') |
462 |
raise faults.PreconditionFailed(
|
463 |
'Resource exists or ETag matches')
|
464 |
|
465 |
|
466 |
def split_container_object_string(s): |
467 |
if not len(s) > 0 or s[0] != '/': |
468 |
raise ValueError |
469 |
s = s[1:]
|
470 |
pos = s.find('/')
|
471 |
if pos == -1 or pos == len(s) - 1: |
472 |
raise ValueError |
473 |
return s[:pos], s[(pos + 1):] |
474 |
|
475 |
|
476 |
def copy_or_move_object(request, src_account, src_container, src_name, |
477 |
dest_account, dest_container, dest_name, |
478 |
move=False, delimiter=None): |
479 |
"""Copy or move an object."""
|
480 |
|
481 |
if 'ignore_content_type' in request.GET and 'CONTENT_TYPE' in request.META: |
482 |
del(request.META['CONTENT_TYPE']) |
483 |
content_type, meta, permissions, public = get_object_headers(request) |
484 |
src_version = request.META.get('HTTP_X_SOURCE_VERSION')
|
485 |
try:
|
486 |
if move:
|
487 |
version_id = request.backend.move_object( |
488 |
request.user_uniq, src_account, src_container, src_name, |
489 |
dest_account, dest_container, dest_name, |
490 |
content_type, 'pithos', meta, False, permissions, delimiter) |
491 |
else:
|
492 |
version_id = request.backend.copy_object( |
493 |
request.user_uniq, src_account, src_container, src_name, |
494 |
dest_account, dest_container, dest_name, |
495 |
content_type, 'pithos', meta, False, permissions, |
496 |
src_version, delimiter) |
497 |
except NotAllowedError:
|
498 |
raise faults.Forbidden('Not allowed') |
499 |
except (ItemNotExists, VersionNotExists):
|
500 |
raise faults.ItemNotFound('Container or object does not exist') |
501 |
except ValueError: |
502 |
raise faults.BadRequest('Invalid sharing header') |
503 |
except QuotaError, e:
|
504 |
raise faults.RequestEntityTooLarge('Quota error: %s' % e) |
505 |
if public is not None: |
506 |
try:
|
507 |
request.backend.update_object_public( |
508 |
request.user_uniq, dest_account, |
509 |
dest_container, dest_name, public) |
510 |
except NotAllowedError:
|
511 |
raise faults.Forbidden('Not allowed') |
512 |
except ItemNotExists:
|
513 |
raise faults.ItemNotFound('Object does not exist') |
514 |
return version_id
|
515 |
|
516 |
|
517 |
def get_int_parameter(p): |
518 |
if p is not None: |
519 |
try:
|
520 |
p = int(p)
|
521 |
except ValueError: |
522 |
return None |
523 |
if p < 0: |
524 |
return None |
525 |
return p
|
526 |
|
527 |
|
528 |
def get_content_length(request): |
529 |
content_length = get_int_parameter(request.META.get('CONTENT_LENGTH'))
|
530 |
if content_length is None: |
531 |
raise faults.LengthRequired('Missing or invalid Content-Length header') |
532 |
return content_length
|
533 |
|
534 |
|
535 |
def get_range(request, size): |
536 |
"""Parse a Range header from the request.
|
537 |
|
538 |
Either returns None, when the header is not existent or should be ignored,
|
539 |
or a list of (offset, length) tuples - should be further checked.
|
540 |
"""
|
541 |
|
542 |
ranges = request.META.get('HTTP_RANGE', '').replace(' ', '') |
543 |
if not ranges.startswith('bytes='): |
544 |
return None |
545 |
|
546 |
ret = [] |
547 |
for r in (x.strip() for x in ranges[6:].split(',')): |
548 |
p = re.compile('^(?P<offset>\d*)-(?P<upto>\d*)$')
|
549 |
m = p.match(r) |
550 |
if not m: |
551 |
return None |
552 |
offset = m.group('offset')
|
553 |
upto = m.group('upto')
|
554 |
if offset == '' and upto == '': |
555 |
return None |
556 |
|
557 |
if offset != '': |
558 |
offset = int(offset)
|
559 |
if upto != '': |
560 |
upto = int(upto)
|
561 |
if offset > upto:
|
562 |
return None |
563 |
ret.append((offset, upto - offset + 1))
|
564 |
else:
|
565 |
ret.append((offset, size - offset)) |
566 |
else:
|
567 |
length = int(upto)
|
568 |
ret.append((size - length, length)) |
569 |
|
570 |
return ret
|
571 |
|
572 |
|
573 |
def get_content_range(request): |
574 |
"""Parse a Content-Range header from the request.
|
575 |
|
576 |
Either returns None, when the header is not existent or should be ignored,
|
577 |
or an (offset, length, total) tuple - check as length, total may be None.
|
578 |
Returns (None, None, None) if the provided range is '*/*'.
|
579 |
"""
|
580 |
|
581 |
ranges = request.META.get('HTTP_CONTENT_RANGE', '') |
582 |
if not ranges: |
583 |
return None |
584 |
|
585 |
p = re.compile('^bytes (?P<offset>\d+)-(?P<upto>\d*)/(?P<total>(\d+|\*))$')
|
586 |
m = p.match(ranges) |
587 |
if not m: |
588 |
if ranges == 'bytes */*': |
589 |
return (None, None, None) |
590 |
return None |
591 |
offset = int(m.group('offset')) |
592 |
upto = m.group('upto')
|
593 |
total = m.group('total')
|
594 |
if upto != '': |
595 |
upto = int(upto)
|
596 |
else:
|
597 |
upto = None
|
598 |
if total != '*': |
599 |
total = int(total)
|
600 |
else:
|
601 |
total = None
|
602 |
if (upto is not None and offset > upto) or \ |
603 |
(total is not None and offset >= total) or \ |
604 |
(total is not None and upto is not None and upto >= total): |
605 |
return None |
606 |
|
607 |
if upto is None: |
608 |
length = None
|
609 |
else:
|
610 |
length = upto - offset + 1
|
611 |
return (offset, length, total)
|
612 |
|
613 |
|
614 |
def get_sharing(request): |
615 |
"""Parse an X-Object-Sharing header from the request.
|
616 |
|
617 |
Raises BadRequest on error.
|
618 |
"""
|
619 |
|
620 |
permissions = request.META.get('HTTP_X_OBJECT_SHARING')
|
621 |
if permissions is None: |
622 |
return None |
623 |
|
624 |
# TODO: Document or remove '~' replacing.
|
625 |
permissions = permissions.replace('~', '') |
626 |
|
627 |
ret = {} |
628 |
permissions = permissions.replace(' ', '') |
629 |
if permissions == '': |
630 |
return ret
|
631 |
for perm in (x for x in permissions.split(';')): |
632 |
if perm.startswith('read='): |
633 |
ret['read'] = list(set( |
634 |
[v.replace(' ', '').lower() for v in perm[5:].split(',')])) |
635 |
if '' in ret['read']: |
636 |
ret['read'].remove('') |
637 |
if '*' in ret['read']: |
638 |
ret['read'] = ['*'] |
639 |
if len(ret['read']) == 0: |
640 |
raise faults.BadRequest(
|
641 |
'Bad X-Object-Sharing header value: invalid length')
|
642 |
elif perm.startswith('write='): |
643 |
ret['write'] = list(set( |
644 |
[v.replace(' ', '').lower() for v in perm[6:].split(',')])) |
645 |
if '' in ret['write']: |
646 |
ret['write'].remove('') |
647 |
if '*' in ret['write']: |
648 |
ret['write'] = ['*'] |
649 |
if len(ret['write']) == 0: |
650 |
raise faults.BadRequest(
|
651 |
'Bad X-Object-Sharing header value: invalid length')
|
652 |
else:
|
653 |
raise faults.BadRequest(
|
654 |
'Bad X-Object-Sharing header value: missing prefix')
|
655 |
|
656 |
# replace displayname with uuid
|
657 |
if TRANSLATE_UUIDS:
|
658 |
try:
|
659 |
ret['read'] = [replace_permissions_displayname(
|
660 |
getattr(request, 'token', None), x) |
661 |
for x in ret.get('read', [])] |
662 |
ret['write'] = [replace_permissions_displayname(
|
663 |
getattr(request, 'token', None), x) |
664 |
for x in ret.get('write', [])] |
665 |
except ItemNotExists, e:
|
666 |
raise faults.BadRequest(
|
667 |
'Bad X-Object-Sharing header value: unknown account: %s' % e)
|
668 |
|
669 |
# Keep duplicates only in write list.
|
670 |
dups = [x for x in ret.get( |
671 |
'read', []) if x in ret.get('write', []) and x != '*'] |
672 |
if dups:
|
673 |
for x in dups: |
674 |
ret['read'].remove(x)
|
675 |
if len(ret['read']) == 0: |
676 |
del(ret['read']) |
677 |
|
678 |
return ret
|
679 |
|
680 |
|
681 |
def get_public(request): |
682 |
"""Parse an X-Object-Public header from the request.
|
683 |
|
684 |
Raises BadRequest on error.
|
685 |
"""
|
686 |
|
687 |
public = request.META.get('HTTP_X_OBJECT_PUBLIC')
|
688 |
if public is None: |
689 |
return None |
690 |
|
691 |
public = public.replace(' ', '').lower() |
692 |
if public == 'true': |
693 |
return True |
694 |
elif public == 'false' or public == '': |
695 |
return False |
696 |
raise faults.BadRequest('Bad X-Object-Public header value') |
697 |
|
698 |
|
699 |
def raw_input_socket(request): |
700 |
"""Return the socket for reading the rest of the request."""
|
701 |
|
702 |
server_software = request.META.get('SERVER_SOFTWARE')
|
703 |
if server_software and server_software.startswith('mod_python'): |
704 |
return request._req
|
705 |
if 'wsgi.input' in request.environ: |
706 |
return request.environ['wsgi.input'] |
707 |
raise NotImplemented('Unknown server software') |
708 |
|
709 |
MAX_UPLOAD_SIZE = 5 * (1024 * 1024 * 1024) # 5GB |
710 |
|
711 |
|
712 |
def socket_read_iterator(request, length=0, blocksize=4096): |
713 |
"""Return maximum of blocksize data read from the socket in each iteration
|
714 |
|
715 |
Read up to 'length'. If 'length' is negative, will attempt a chunked read.
|
716 |
The maximum ammount of data read is controlled by MAX_UPLOAD_SIZE.
|
717 |
"""
|
718 |
|
719 |
sock = raw_input_socket(request) |
720 |
if length < 0: # Chunked transfers |
721 |
# Small version (server does the dechunking).
|
722 |
if (request.environ.get('mod_wsgi.input_chunked', None) |
723 |
or request.META['SERVER_SOFTWARE'].startswith('gunicorn')): |
724 |
while length < MAX_UPLOAD_SIZE:
|
725 |
data = sock.read(blocksize) |
726 |
if data == '': |
727 |
return
|
728 |
yield data
|
729 |
raise faults.BadRequest('Maximum size is reached') |
730 |
|
731 |
# Long version (do the dechunking).
|
732 |
data = ''
|
733 |
while length < MAX_UPLOAD_SIZE:
|
734 |
# Get chunk size.
|
735 |
if hasattr(sock, 'readline'): |
736 |
chunk_length = sock.readline() |
737 |
else:
|
738 |
chunk_length = ''
|
739 |
while chunk_length[-1:] != '\n': |
740 |
chunk_length += sock.read(1)
|
741 |
chunk_length.strip() |
742 |
pos = chunk_length.find(';')
|
743 |
if pos >= 0: |
744 |
chunk_length = chunk_length[:pos] |
745 |
try:
|
746 |
chunk_length = int(chunk_length, 16) |
747 |
except Exception: |
748 |
raise faults.BadRequest('Bad chunk size') |
749 |
# TODO: Change to something more appropriate.
|
750 |
# Check if done.
|
751 |
if chunk_length == 0: |
752 |
if len(data) > 0: |
753 |
yield data
|
754 |
return
|
755 |
# Get the actual data.
|
756 |
while chunk_length > 0: |
757 |
chunk = sock.read(min(chunk_length, blocksize))
|
758 |
chunk_length -= len(chunk)
|
759 |
if length > 0: |
760 |
length += len(chunk)
|
761 |
data += chunk |
762 |
if len(data) >= blocksize: |
763 |
ret = data[:blocksize] |
764 |
data = data[blocksize:] |
765 |
yield ret
|
766 |
sock.read(2) # CRLF |
767 |
raise faults.BadRequest('Maximum size is reached') |
768 |
else:
|
769 |
if length > MAX_UPLOAD_SIZE:
|
770 |
raise faults.BadRequest('Maximum size is reached') |
771 |
while length > 0: |
772 |
data = sock.read(min(length, blocksize))
|
773 |
if not data: |
774 |
raise faults.BadRequest()
|
775 |
length -= len(data)
|
776 |
yield data
|
777 |
|
778 |
|
779 |
class SaveToBackendHandler(FileUploadHandler): |
780 |
"""Handle a file from an HTML form the django way."""
|
781 |
|
782 |
def __init__(self, request=None): |
783 |
super(SaveToBackendHandler, self).__init__(request) |
784 |
self.backend = request.backend
|
785 |
|
786 |
def put_data(self, length): |
787 |
if len(self.data) >= length: |
788 |
block = self.data[:length]
|
789 |
self.file.hashmap.append(self.backend.put_block(block)) |
790 |
self.checksum_compute.update(block)
|
791 |
self.data = self.data[length:] |
792 |
|
793 |
def new_file(self, field_name, file_name, content_type, |
794 |
content_length, charset=None):
|
795 |
self.checksum_compute = NoChecksum() if not UPDATE_MD5 else Checksum() |
796 |
self.data = '' |
797 |
self.file = UploadedFile(
|
798 |
name=file_name, content_type=content_type, charset=charset) |
799 |
self.file.size = 0 |
800 |
self.file.hashmap = []
|
801 |
|
802 |
def receive_data_chunk(self, raw_data, start): |
803 |
self.data += raw_data
|
804 |
self.file.size += len(raw_data) |
805 |
self.put_data(self.request.backend.block_size) |
806 |
return None |
807 |
|
808 |
def file_complete(self, file_size): |
809 |
l = len(self.data) |
810 |
if l > 0: |
811 |
self.put_data(l)
|
812 |
self.file.etag = self.checksum_compute.hexdigest() |
813 |
return self.file |
814 |
|
815 |
|
816 |
class ObjectWrapper(object): |
817 |
"""Return the object's data block-per-block in each iteration.
|
818 |
|
819 |
Read from the object using the offset and length provided
|
820 |
in each entry of the range list.
|
821 |
"""
|
822 |
|
823 |
def __init__(self, backend, ranges, sizes, hashmaps, boundary): |
824 |
self.backend = backend
|
825 |
self.ranges = ranges
|
826 |
self.sizes = sizes
|
827 |
self.hashmaps = hashmaps
|
828 |
self.boundary = boundary
|
829 |
self.size = sum(self.sizes) |
830 |
|
831 |
self.file_index = 0 |
832 |
self.block_index = 0 |
833 |
self.block_hash = -1 |
834 |
self.block = '' |
835 |
|
836 |
self.range_index = -1 |
837 |
self.offset, self.length = self.ranges[0] |
838 |
|
839 |
def __iter__(self): |
840 |
return self |
841 |
|
842 |
def part_iterator(self): |
843 |
if self.length > 0: |
844 |
# Get the file for the current offset.
|
845 |
file_size = self.sizes[self.file_index] |
846 |
while self.offset >= file_size: |
847 |
self.offset -= file_size
|
848 |
self.file_index += 1 |
849 |
file_size = self.sizes[self.file_index] |
850 |
|
851 |
# Get the block for the current position.
|
852 |
self.block_index = int(self.offset / self.backend.block_size) |
853 |
if self.block_hash != \ |
854 |
self.hashmaps[self.file_index][self.block_index]: |
855 |
self.block_hash = self.hashmaps[ |
856 |
self.file_index][self.block_index] |
857 |
try:
|
858 |
self.block = self.backend.get_block(self.block_hash) |
859 |
except ItemNotExists:
|
860 |
raise faults.ItemNotFound('Block does not exist') |
861 |
|
862 |
# Get the data from the block.
|
863 |
bo = self.offset % self.backend.block_size |
864 |
bs = self.backend.block_size
|
865 |
if (self.block_index == len(self.hashmaps[self.file_index]) - 1 and |
866 |
self.sizes[self.file_index] % self.backend.block_size): |
867 |
bs = self.sizes[self.file_index] % self.backend.block_size |
868 |
bl = min(self.length, bs - bo) |
869 |
data = self.block[bo:bo + bl]
|
870 |
self.offset += bl
|
871 |
self.length -= bl
|
872 |
return data
|
873 |
else:
|
874 |
raise StopIteration |
875 |
|
876 |
def next(self): |
877 |
if len(self.ranges) == 1: |
878 |
return self.part_iterator() |
879 |
if self.range_index == len(self.ranges): |
880 |
raise StopIteration |
881 |
try:
|
882 |
if self.range_index == -1: |
883 |
raise StopIteration |
884 |
return self.part_iterator() |
885 |
except StopIteration: |
886 |
self.range_index += 1 |
887 |
out = [] |
888 |
if self.range_index < len(self.ranges): |
889 |
# Part header.
|
890 |
self.offset, self.length = self.ranges[self.range_index] |
891 |
self.file_index = 0 |
892 |
if self.range_index > 0: |
893 |
out.append('')
|
894 |
out.append('--' + self.boundary) |
895 |
out.append('Content-Range: bytes %d-%d/%d' % (
|
896 |
self.offset, self.offset + self.length - 1, self.size)) |
897 |
out.append('Content-Transfer-Encoding: binary')
|
898 |
out.append('')
|
899 |
out.append('')
|
900 |
return '\r\n'.join(out) |
901 |
else:
|
902 |
# Footer.
|
903 |
out.append('')
|
904 |
out.append('--' + self.boundary + '--') |
905 |
out.append('')
|
906 |
return '\r\n'.join(out) |
907 |
|
908 |
|
909 |
def object_data_response(request, sizes, hashmaps, meta, public=False): |
910 |
"""Get the HttpResponse object for replying with the object's data."""
|
911 |
|
912 |
# Range handling.
|
913 |
size = sum(sizes)
|
914 |
ranges = get_range(request, size) |
915 |
if ranges is None: |
916 |
ranges = [(0, size)]
|
917 |
ret = 200
|
918 |
else:
|
919 |
check = [True for offset, length in ranges if |
920 |
length <= 0 or length > size or |
921 |
offset < 0 or offset >= size or |
922 |
offset + length > size] |
923 |
if len(check) > 0: |
924 |
raise faults.RangeNotSatisfiable(
|
925 |
'Requested range exceeds object limits')
|
926 |
ret = 206
|
927 |
if_range = request.META.get('HTTP_IF_RANGE')
|
928 |
if if_range:
|
929 |
try:
|
930 |
# Modification time has passed instead.
|
931 |
last_modified = parse_http_date(if_range) |
932 |
if last_modified != meta['modified']: |
933 |
ranges = [(0, size)]
|
934 |
ret = 200
|
935 |
except ValueError: |
936 |
if if_range != meta['checksum']: |
937 |
ranges = [(0, size)]
|
938 |
ret = 200
|
939 |
|
940 |
if ret == 206 and len(ranges) > 1: |
941 |
boundary = uuid.uuid4().hex |
942 |
else:
|
943 |
boundary = ''
|
944 |
wrapper = ObjectWrapper(request.backend, ranges, sizes, hashmaps, boundary) |
945 |
response = HttpResponse(wrapper, status=ret) |
946 |
put_object_headers( |
947 |
response, meta, restricted=public, |
948 |
token=getattr(request, 'token', None)) |
949 |
if ret == 206: |
950 |
if len(ranges) == 1: |
951 |
offset, length = ranges[0]
|
952 |
response[ |
953 |
'Content-Length'] = length # Update with the correct length. |
954 |
response['Content-Range'] = 'bytes %d-%d/%d' % ( |
955 |
offset, offset + length - 1, size)
|
956 |
else:
|
957 |
del(response['Content-Length']) |
958 |
response['Content-Type'] = 'multipart/byteranges; boundary=%s' % ( |
959 |
boundary,) |
960 |
return response
|
961 |
|
962 |
|
963 |
def put_object_block(request, hashmap, data, offset): |
964 |
"""Put one block of data at the given offset."""
|
965 |
|
966 |
bi = int(offset / request.backend.block_size)
|
967 |
bo = offset % request.backend.block_size |
968 |
bl = min(len(data), request.backend.block_size - bo) |
969 |
if bi < len(hashmap): |
970 |
hashmap[bi] = request.backend.update_block(hashmap[bi], data[:bl], bo) |
971 |
else:
|
972 |
hashmap.append(request.backend.put_block(('\x00' * bo) + data[:bl]))
|
973 |
return bl # Return ammount of data written. |
974 |
|
975 |
|
976 |
def hashmap_md5(backend, hashmap, size): |
977 |
"""Produce the MD5 sum from the data in the hashmap."""
|
978 |
|
979 |
# TODO: Search backend for the MD5 of another object
|
980 |
# with the same hashmap and size...
|
981 |
md5 = hashlib.md5() |
982 |
bs = backend.block_size |
983 |
for bi, hash in enumerate(hashmap): |
984 |
data = backend.get_block(hash) # Blocks come in padded. |
985 |
if bi == len(hashmap) - 1: |
986 |
data = data[:size % bs] |
987 |
md5.update(data) |
988 |
return md5.hexdigest().lower()
|
989 |
|
990 |
|
991 |
def simple_list_response(request, l): |
992 |
if request.serialization == 'text': |
993 |
return '\n'.join(l) + '\n' |
994 |
if request.serialization == 'xml': |
995 |
return render_to_string('items.xml', {'items': l}) |
996 |
if request.serialization == 'json': |
997 |
return json.dumps(l)
|
998 |
|
999 |
|
1000 |
from pithos.backends.util import PithosBackendPool |
1001 |
|
1002 |
if RADOS_STORAGE:
|
1003 |
BLOCK_PARAMS = {'mappool': RADOS_POOL_MAPS,
|
1004 |
'blockpool': RADOS_POOL_BLOCKS, }
|
1005 |
else:
|
1006 |
BLOCK_PARAMS = {'mappool': None, |
1007 |
'blockpool': None, } |
1008 |
|
1009 |
BACKEND_KWARGS = dict(
|
1010 |
db_module=BACKEND_DB_MODULE, |
1011 |
db_connection=BACKEND_DB_CONNECTION, |
1012 |
block_module=BACKEND_BLOCK_MODULE, |
1013 |
block_path=BACKEND_BLOCK_PATH, |
1014 |
block_umask=BACKEND_BLOCK_UMASK, |
1015 |
block_size=BACKEND_BLOCK_SIZE, |
1016 |
hash_algorithm=BACKEND_HASH_ALGORITHM, |
1017 |
queue_module=BACKEND_QUEUE_MODULE, |
1018 |
queue_hosts=BACKEND_QUEUE_HOSTS, |
1019 |
queue_exchange=BACKEND_QUEUE_EXCHANGE, |
1020 |
astakos_auth_url=ASTAKOS_AUTH_URL, |
1021 |
service_token=SERVICE_TOKEN, |
1022 |
astakosclient_poolsize=ASTAKOSCLIENT_POOLSIZE, |
1023 |
free_versioning=BACKEND_FREE_VERSIONING, |
1024 |
block_params=BLOCK_PARAMS, |
1025 |
public_url_security=PUBLIC_URL_SECURITY, |
1026 |
public_url_alphabet=PUBLIC_URL_ALPHABET, |
1027 |
account_quota_policy=BACKEND_ACCOUNT_QUOTA, |
1028 |
container_quota_policy=BACKEND_CONTAINER_QUOTA, |
1029 |
container_versioning_policy=BACKEND_VERSIONING) |
1030 |
|
1031 |
_pithos_backend_pool = PithosBackendPool(size=BACKEND_POOL_SIZE, |
1032 |
**BACKEND_KWARGS) |
1033 |
|
1034 |
|
1035 |
def get_backend(): |
1036 |
if BACKEND_POOL_ENABLED:
|
1037 |
backend = _pithos_backend_pool.pool_get() |
1038 |
else:
|
1039 |
backend = connect_backend(**BACKEND_KWARGS) |
1040 |
backend.serials = [] |
1041 |
backend.messages = [] |
1042 |
return backend
|
1043 |
|
1044 |
|
1045 |
def update_request_headers(request): |
1046 |
# Handle URL-encoded keys and values.
|
1047 |
meta = dict([(
|
1048 |
k, v) for k, v in request.META.iteritems() if k.startswith('HTTP_')]) |
1049 |
for k, v in meta.iteritems(): |
1050 |
try:
|
1051 |
k.decode('ascii')
|
1052 |
v.decode('ascii')
|
1053 |
except UnicodeDecodeError: |
1054 |
raise faults.BadRequest('Bad character in headers.') |
1055 |
if '%' in k or '%' in v: |
1056 |
del(request.META[k])
|
1057 |
request.META[unquote(k)] = smart_unicode(unquote( |
1058 |
v), strings_only=True)
|
1059 |
|
1060 |
|
1061 |
def update_response_headers(request, response): |
1062 |
# URL-encode unicode in headers.
|
1063 |
meta = response.items() |
1064 |
for k, v in meta: |
1065 |
if (k.startswith('X-Account-') or k.startswith('X-Container-') or |
1066 |
k.startswith('X-Object-') or k.startswith('Content-')): |
1067 |
del(response[k])
|
1068 |
response[quote(k)] = quote(v, safe='/=,:@; ')
|
1069 |
|
1070 |
|
1071 |
def api_method(http_method=None, token_required=True, user_required=True, |
1072 |
logger=None, format_allowed=False, serializations=None, |
1073 |
strict_serlization=False, lock_container_path=False): |
1074 |
serializations = serializations or ['json', 'xml'] |
1075 |
|
1076 |
def decorator(func): |
1077 |
@api.api_method(http_method=http_method, token_required=token_required,
|
1078 |
user_required=user_required, |
1079 |
logger=logger, format_allowed=format_allowed, |
1080 |
astakos_auth_url=ASTAKOS_AUTH_URL, |
1081 |
serializations=serializations, |
1082 |
strict_serlization=strict_serlization) |
1083 |
@wraps(func)
|
1084 |
def wrapper(request, *args, **kwargs): |
1085 |
# The args variable may contain up to (account, container, object).
|
1086 |
if len(args) > 1 and len(args[1]) > 256: |
1087 |
raise faults.BadRequest("Container name too large") |
1088 |
if len(args) > 2 and len(args[2]) > 1024: |
1089 |
raise faults.BadRequest('Object name too large.') |
1090 |
|
1091 |
success_status = False
|
1092 |
try:
|
1093 |
# Add a PithosBackend as attribute of the request object
|
1094 |
request.backend = get_backend() |
1095 |
request.backend.pre_exec(lock_container_path) |
1096 |
|
1097 |
# Many API method expect thet X-Auth-Token in request,token
|
1098 |
request.token = request.x_auth_token |
1099 |
update_request_headers(request) |
1100 |
response = func(request, *args, **kwargs) |
1101 |
update_response_headers(request, response) |
1102 |
|
1103 |
success_status = True
|
1104 |
return response
|
1105 |
finally:
|
1106 |
# Always close PithosBackend connection
|
1107 |
if getattr(request, "backend", None) is not None: |
1108 |
request.backend.post_exec(success_status) |
1109 |
request.backend.close() |
1110 |
return wrapper
|
1111 |
return decorator
|
1112 |
|
1113 |
|
1114 |
def restrict_to_host(host=None): |
1115 |
"""
|
1116 |
View decorator which restricts wrapped view to be accessed only under the
|
1117 |
host set. If an invalid host is identified and request HTTP method is one
|
1118 |
of ``GET``, ``HOST``, the decorator will return a redirect response using a
|
1119 |
clone of the request with host replaced to the one the restriction applies
|
1120 |
to.
|
1121 |
|
1122 |
e.g.
|
1123 |
@restrict_to_host('files.example.com')
|
1124 |
my_restricted_view(request, path):
|
1125 |
return HttpResponse(file(path).read())
|
1126 |
|
1127 |
A get to ``https://api.example.com/my_restricted_view/file_path/?param=1``
|
1128 |
will return a redirect response with Location header set to
|
1129 |
``https://files.example.com/my_restricted_view/file_path/?param=1``.
|
1130 |
|
1131 |
If host is set to ``None`` no restriction will be applied.
|
1132 |
"""
|
1133 |
def decorator(func): |
1134 |
# skip decoration if no host is set
|
1135 |
if not host: |
1136 |
return func
|
1137 |
|
1138 |
@wraps(func)
|
1139 |
def wrapper(request, *args, **kwargs): |
1140 |
request_host = request.get_host() |
1141 |
if host != request_host:
|
1142 |
proto = 'https' if request.is_secure() else 'http' |
1143 |
if request.method in ['GET', 'HEAD']: |
1144 |
full_path = request.get_full_path() |
1145 |
redirect_uri = "%s://%s%s" % (proto, host, full_path)
|
1146 |
return HttpResponseRedirect(redirect_uri)
|
1147 |
else:
|
1148 |
raise PermissionDenied
|
1149 |
return func(request, *args, **kwargs)
|
1150 |
return wrapper
|
1151 |
return decorator
|
1152 |
|
1153 |
|
1154 |
def view_method(): |
1155 |
"""Decorator function for views."""
|
1156 |
|
1157 |
def decorator(func): |
1158 |
@restrict_to_host(UNSAFE_DOMAIN)
|
1159 |
@wraps(func)
|
1160 |
def wrapper(request, *args, **kwargs): |
1161 |
if request.method not in ['GET', 'HEAD']: |
1162 |
return HttpResponseNotAllowed(['GET', 'HEAD']) |
1163 |
|
1164 |
try:
|
1165 |
access_token = request.GET.get('access_token')
|
1166 |
requested_resource = text.uenc(request.path.split(VIEW_PREFIX, |
1167 |
2)[-1]) |
1168 |
astakos = AstakosClient(SERVICE_TOKEN, ASTAKOS_AUTH_URL, |
1169 |
retry=2, use_pool=True, |
1170 |
logger=logger) |
1171 |
if access_token is not None: |
1172 |
# authenticate using the short-term access token
|
1173 |
try:
|
1174 |
request.user = astakos.validate_token( |
1175 |
access_token, requested_resource) |
1176 |
except AstakosClientException:
|
1177 |
return HttpResponseRedirect(request.path)
|
1178 |
request.user_uniq = request.user["access"]["user"]["id"] |
1179 |
|
1180 |
_func = api_method(token_required=False,
|
1181 |
user_required=False)(func)
|
1182 |
response = _func(request, *args, **kwargs) |
1183 |
if response.status_code == 404: |
1184 |
raise Http404
|
1185 |
elif response.status_code == 403: |
1186 |
raise PermissionDenied
|
1187 |
return response
|
1188 |
|
1189 |
client_id, client_secret = OAUTH2_CLIENT_CREDENTIALS |
1190 |
# TODO: check if client credentials are not set
|
1191 |
authorization_code = request.GET.get('code')
|
1192 |
if authorization_code is None: |
1193 |
# request authorization code
|
1194 |
params = {'response_type': 'code', |
1195 |
'client_id': client_id,
|
1196 |
'redirect_uri':
|
1197 |
request.build_absolute_uri(request.path), |
1198 |
'state': '', # TODO include state for security |
1199 |
'scope': requested_resource}
|
1200 |
return HttpResponseRedirect('%s?%s' % |
1201 |
(join_urls(astakos.oauth2_url, |
1202 |
'auth'),
|
1203 |
urlencode(params))) |
1204 |
else:
|
1205 |
# request short-term access token
|
1206 |
redirect_uri = request.build_absolute_uri(request.path) |
1207 |
data = astakos.get_token('authorization_code',
|
1208 |
*OAUTH2_CLIENT_CREDENTIALS, |
1209 |
redirect_uri=redirect_uri, |
1210 |
scope=requested_resource, |
1211 |
code=authorization_code) |
1212 |
params = {'access_token': data.get('access_token', '')} |
1213 |
return HttpResponseRedirect('%s?%s' % (redirect_uri, |
1214 |
urlencode(params))) |
1215 |
except AstakosClientException, err:
|
1216 |
logger.exception(err) |
1217 |
raise PermissionDenied
|
1218 |
return wrapper
|
1219 |
return decorator
|
1220 |
|
1221 |
|
1222 |
class Checksum: |
1223 |
def __init__(self): |
1224 |
self.md5 = hashlib.md5()
|
1225 |
|
1226 |
def update(self, data): |
1227 |
self.md5.update(data)
|
1228 |
|
1229 |
def hexdigest(self): |
1230 |
return self.md5.hexdigest().lower() |
1231 |
|
1232 |
|
1233 |
class NoChecksum: |
1234 |
def update(self, data): |
1235 |
pass
|
1236 |
|
1237 |
def hexdigest(self): |
1238 |
return '' |