root / pithos / api / util.py @ a7ba12d7
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1 | 2e662088 | Antony Chazapis | # Copyright 2011-2012 GRNET S.A. All rights reserved.
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2 | 5635f9ef | Antony Chazapis | #
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3 | 5635f9ef | Antony Chazapis | # Redistribution and use in source and binary forms, with or
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4 | 5635f9ef | Antony Chazapis | # without modification, are permitted provided that the following
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5 | 5635f9ef | Antony Chazapis | # conditions are met:
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6 | 5635f9ef | Antony Chazapis | #
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7 | 5635f9ef | Antony Chazapis | # 1. Redistributions of source code must retain the above
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8 | 5635f9ef | Antony Chazapis | # copyright notice, this list of conditions and the following
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9 | 5635f9ef | Antony Chazapis | # disclaimer.
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10 | 5635f9ef | Antony Chazapis | #
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11 | 5635f9ef | Antony Chazapis | # 2. Redistributions in binary form must reproduce the above
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12 | 5635f9ef | Antony Chazapis | # copyright notice, this list of conditions and the following
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13 | 5635f9ef | Antony Chazapis | # disclaimer in the documentation and/or other materials
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14 | 5635f9ef | Antony Chazapis | # provided with the distribution.
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15 | 5635f9ef | Antony Chazapis | #
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16 | 5635f9ef | Antony Chazapis | # THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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17 | 5635f9ef | Antony Chazapis | # OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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18 | 5635f9ef | Antony Chazapis | # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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19 | 5635f9ef | Antony Chazapis | # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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20 | 5635f9ef | Antony Chazapis | # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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21 | 5635f9ef | Antony Chazapis | # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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22 | 5635f9ef | Antony Chazapis | # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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23 | 5635f9ef | Antony Chazapis | # USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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24 | 5635f9ef | Antony Chazapis | # AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 | 5635f9ef | Antony Chazapis | # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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26 | 5635f9ef | Antony Chazapis | # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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27 | 5635f9ef | Antony Chazapis | # POSSIBILITY OF SUCH DAMAGE.
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28 | 5635f9ef | Antony Chazapis | #
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29 | 5635f9ef | Antony Chazapis | # The views and conclusions contained in the software and
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30 | 5635f9ef | Antony Chazapis | # documentation are those of the authors and should not be
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31 | 5635f9ef | Antony Chazapis | # interpreted as representing official policies, either expressed
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32 | 5635f9ef | Antony Chazapis | # or implied, of GRNET S.A.
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33 | 5635f9ef | Antony Chazapis | |
34 | b956618e | Antony Chazapis | from functools import wraps |
35 | b956618e | Antony Chazapis | from time import time |
36 | b956618e | Antony Chazapis | from traceback import format_exc |
37 | b956618e | Antony Chazapis | from wsgiref.handlers import format_date_time |
38 | 0d4ea090 | Antony Chazapis | from binascii import hexlify, unhexlify |
39 | e11087c2 | Antony Chazapis | from datetime import datetime, tzinfo, timedelta |
40 | 9fefc052 | Antony Chazapis | from urllib import quote, unquote |
41 | b956618e | Antony Chazapis | |
42 | b956618e | Antony Chazapis | from django.conf import settings |
43 | b956618e | Antony Chazapis | from django.http import HttpResponse |
44 | 1993fea9 | Antony Chazapis | from django.utils import simplejson as json |
45 | 22dab079 | Antony Chazapis | from django.utils.http import http_date, parse_etags |
46 | fb064032 | Antony Chazapis | from django.utils.encoding import smart_unicode, smart_str |
47 | 817890f2 | Antony Chazapis | from django.core.files.uploadhandler import FileUploadHandler |
48 | 817890f2 | Antony Chazapis | from django.core.files.uploadedfile import UploadedFile |
49 | b956618e | Antony Chazapis | |
50 | 5a96180b | Antony Chazapis | from pithos.lib.compat import parse_http_date_safe, parse_http_date |
51 | 5a96180b | Antony Chazapis | |
52 | 297513ba | Antony Chazapis | from pithos.api.faults import (Fault, NotModified, BadRequest, Unauthorized, Forbidden, ItemNotFound, |
53 | 5df6c6d1 | Antony Chazapis | Conflict, LengthRequired, PreconditionFailed, RequestEntityTooLarge, |
54 | 08de868d | Antony Chazapis | RangeNotSatisfiable, InternalServerError, NotImplemented)
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55 | bb4eafc6 | Antony Chazapis | from pithos.api.short_url import encode_url |
56 | 39593b2b | Giorgos Verigakis | from pithos.backends import connect_backend |
57 | 5df6c6d1 | Antony Chazapis | from pithos.backends.base import NotAllowedError, QuotaError |
58 | b956618e | Antony Chazapis | |
59 | b956618e | Antony Chazapis | import logging |
60 | 22dab079 | Antony Chazapis | import re |
61 | cbfb6636 | Sofia Papagiannaki | import hashlib |
62 | 7bef5750 | Antony Chazapis | import uuid |
63 | c48acbfd | Sofia Papagiannaki | import decimal |
64 | 8c793655 | Antony Chazapis | |
65 | b956618e | Antony Chazapis | |
66 | b956618e | Antony Chazapis | logger = logging.getLogger(__name__) |
67 | b956618e | Antony Chazapis | |
68 | b956618e | Antony Chazapis | |
69 | e11087c2 | Antony Chazapis | class UTC(tzinfo): |
70 | e11087c2 | Antony Chazapis | def utcoffset(self, dt): |
71 | e11087c2 | Antony Chazapis | return timedelta(0) |
72 | e11087c2 | Antony Chazapis | |
73 | e11087c2 | Antony Chazapis | def tzname(self, dt): |
74 | e11087c2 | Antony Chazapis | return 'UTC' |
75 | e11087c2 | Antony Chazapis | |
76 | e11087c2 | Antony Chazapis | def dst(self, dt): |
77 | e11087c2 | Antony Chazapis | return timedelta(0) |
78 | e11087c2 | Antony Chazapis | |
79 | c48acbfd | Sofia Papagiannaki | def json_encode_decimal(obj): |
80 | c48acbfd | Sofia Papagiannaki | if isinstance(obj, decimal.Decimal): |
81 | c48acbfd | Sofia Papagiannaki | return str(obj) |
82 | c48acbfd | Sofia Papagiannaki | raise TypeError(repr(obj) + " is not JSON serializable") |
83 | c48acbfd | Sofia Papagiannaki | |
84 | e11087c2 | Antony Chazapis | def isoformat(d): |
85 | e11087c2 | Antony Chazapis | """Return an ISO8601 date string that includes a timezone."""
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86 | e11087c2 | Antony Chazapis | |
87 | e11087c2 | Antony Chazapis | return d.replace(tzinfo=UTC()).isoformat()
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88 | e11087c2 | Antony Chazapis | |
89 | 804e8fe7 | Antony Chazapis | def rename_meta_key(d, old, new): |
90 | 804e8fe7 | Antony Chazapis | if old not in d: |
91 | 804e8fe7 | Antony Chazapis | return
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92 | 804e8fe7 | Antony Chazapis | d[new] = d[old] |
93 | 804e8fe7 | Antony Chazapis | del(d[old])
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94 | 804e8fe7 | Antony Chazapis | |
95 | 02c0c3fa | Antony Chazapis | def printable_header_dict(d): |
96 | b956618e | Antony Chazapis | """Format a meta dictionary for printing out json/xml.
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97 | b956618e | Antony Chazapis |
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98 | 804e8fe7 | Antony Chazapis | Convert all keys to lower case and replace dashes with underscores.
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99 | 804e8fe7 | Antony Chazapis | Format 'last_modified' timestamp.
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100 | b956618e | Antony Chazapis | """
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101 | 83dd59c5 | Antony Chazapis | |
102 | 690747fe | Antony Chazapis | if 'last_modified' in d: |
103 | 690747fe | Antony Chazapis | d['last_modified'] = isoformat(datetime.fromtimestamp(d['last_modified'])) |
104 | b956618e | Antony Chazapis | return dict([(k.lower().replace('-', '_'), v) for k, v in d.iteritems()]) |
105 | b956618e | Antony Chazapis | |
106 | 02c0c3fa | Antony Chazapis | def format_header_key(k): |
107 | 58a6c894 | Antony Chazapis | """Convert underscores to dashes and capitalize intra-dash strings."""
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108 | b956618e | Antony Chazapis | return '-'.join([x.capitalize() for x in k.replace('_', '-').split('-')]) |
109 | b956618e | Antony Chazapis | |
110 | 02c0c3fa | Antony Chazapis | def get_header_prefix(request, prefix): |
111 | 02c0c3fa | Antony Chazapis | """Get all prefix-* request headers in a dict. Reformat keys with format_header_key()."""
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112 | 83dd59c5 | Antony Chazapis | |
113 | b956618e | Antony Chazapis | prefix = 'HTTP_' + prefix.upper().replace('-', '_') |
114 | 3ab38c43 | Antony Chazapis | # TODO: Document or remove '~' replacing.
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115 | 3ab38c43 | Antony Chazapis | return dict([(format_header_key(k[5:]), v.replace('~', '')) for k, v in request.META.iteritems() if k.startswith(prefix) and len(k) > len(prefix)]) |
116 | 02c0c3fa | Antony Chazapis | |
117 | 02c0c3fa | Antony Chazapis | def get_account_headers(request): |
118 | 02c0c3fa | Antony Chazapis | meta = get_header_prefix(request, 'X-Account-Meta-')
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119 | 02c0c3fa | Antony Chazapis | groups = {} |
120 | 02c0c3fa | Antony Chazapis | for k, v in get_header_prefix(request, 'X-Account-Group-').iteritems(): |
121 | 02c0c3fa | Antony Chazapis | n = k[16:].lower()
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122 | 02c0c3fa | Antony Chazapis | if '-' in n or '_' in n: |
123 | 02c0c3fa | Antony Chazapis | raise BadRequest('Bad characters in group name') |
124 | 02c0c3fa | Antony Chazapis | groups[n] = v.replace(' ', '').split(',') |
125 | 40d6b76d | Antony Chazapis | while '' in groups[n]: |
126 | 02c0c3fa | Antony Chazapis | groups[n].remove('')
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127 | 02c0c3fa | Antony Chazapis | return meta, groups
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128 | 02c0c3fa | Antony Chazapis | |
129 | 647a5f48 | Antony Chazapis | def put_account_headers(response, meta, groups, policy): |
130 | f6c97079 | Antony Chazapis | if 'count' in meta: |
131 | f6c97079 | Antony Chazapis | response['X-Account-Container-Count'] = meta['count'] |
132 | f6c97079 | Antony Chazapis | if 'bytes' in meta: |
133 | f6c97079 | Antony Chazapis | response['X-Account-Bytes-Used'] = meta['bytes'] |
134 | d065f612 | Antony Chazapis | response['Last-Modified'] = http_date(int(meta['modified'])) |
135 | b956618e | Antony Chazapis | for k in [x for x in meta.keys() if x.startswith('X-Account-Meta-')]: |
136 | e7b51248 | Sofia Papagiannaki | response[smart_str(k, strings_only=True)] = smart_str(meta[k], strings_only=True) |
137 | 83dd59c5 | Antony Chazapis | if 'until_timestamp' in meta: |
138 | 83dd59c5 | Antony Chazapis | response['X-Account-Until-Timestamp'] = http_date(int(meta['until_timestamp'])) |
139 | 02c0c3fa | Antony Chazapis | for k, v in groups.iteritems(): |
140 | e7b51248 | Sofia Papagiannaki | k = smart_str(k, strings_only=True)
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141 | e7b51248 | Sofia Papagiannaki | k = format_header_key('X-Account-Group-' + k)
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142 | e7b51248 | Sofia Papagiannaki | v = smart_str(','.join(v), strings_only=True) |
143 | e7b51248 | Sofia Papagiannaki | response[k] = v |
144 | 647a5f48 | Antony Chazapis | for k, v in policy.iteritems(): |
145 | 647a5f48 | Antony Chazapis | response[smart_str(format_header_key('X-Account-Policy-' + k), strings_only=True)] = smart_str(v, strings_only=True) |
146 | 647a5f48 | Antony Chazapis | |
147 | 02c0c3fa | Antony Chazapis | def get_container_headers(request): |
148 | 02c0c3fa | Antony Chazapis | meta = get_header_prefix(request, 'X-Container-Meta-')
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149 | 3ab38c43 | Antony Chazapis | policy = dict([(k[19:].lower(), v.replace(' ', '')) for k, v in get_header_prefix(request, 'X-Container-Policy-').iteritems()]) |
150 | 3ab38c43 | Antony Chazapis | return meta, policy
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151 | b956618e | Antony Chazapis | |
152 | 39593b2b | Giorgos Verigakis | def put_container_headers(request, response, meta, policy): |
153 | f6c97079 | Antony Chazapis | if 'count' in meta: |
154 | f6c97079 | Antony Chazapis | response['X-Container-Object-Count'] = meta['count'] |
155 | f6c97079 | Antony Chazapis | if 'bytes' in meta: |
156 | f6c97079 | Antony Chazapis | response['X-Container-Bytes-Used'] = meta['bytes'] |
157 | 58a6c894 | Antony Chazapis | response['Last-Modified'] = http_date(int(meta['modified'])) |
158 | b956618e | Antony Chazapis | for k in [x for x in meta.keys() if x.startswith('X-Container-Meta-')]: |
159 | e7b51248 | Sofia Papagiannaki | response[smart_str(k, strings_only=True)] = smart_str(meta[k], strings_only=True) |
160 | e7b51248 | Sofia Papagiannaki | l = [smart_str(x, strings_only=True) for x in meta['object_meta'] if x.startswith('X-Object-Meta-')] |
161 | e7b51248 | Sofia Papagiannaki | response['X-Container-Object-Meta'] = ','.join([x[14:] for x in l]) |
162 | 39593b2b | Giorgos Verigakis | response['X-Container-Block-Size'] = request.backend.block_size
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163 | 39593b2b | Giorgos Verigakis | response['X-Container-Block-Hash'] = request.backend.hash_algorithm
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164 | 83dd59c5 | Antony Chazapis | if 'until_timestamp' in meta: |
165 | 83dd59c5 | Antony Chazapis | response['X-Container-Until-Timestamp'] = http_date(int(meta['until_timestamp'])) |
166 | 3ab38c43 | Antony Chazapis | for k, v in policy.iteritems(): |
167 | e7b51248 | Sofia Papagiannaki | response[smart_str(format_header_key('X-Container-Policy-' + k), strings_only=True)] = smart_str(v, strings_only=True) |
168 | b956618e | Antony Chazapis | |
169 | 02c0c3fa | Antony Chazapis | def get_object_headers(request): |
170 | 02c0c3fa | Antony Chazapis | meta = get_header_prefix(request, 'X-Object-Meta-')
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171 | b956618e | Antony Chazapis | if request.META.get('CONTENT_TYPE'): |
172 | b956618e | Antony Chazapis | meta['Content-Type'] = request.META['CONTENT_TYPE'] |
173 | b956618e | Antony Chazapis | if request.META.get('HTTP_CONTENT_ENCODING'): |
174 | b956618e | Antony Chazapis | meta['Content-Encoding'] = request.META['HTTP_CONTENT_ENCODING'] |
175 | 22dab079 | Antony Chazapis | if request.META.get('HTTP_CONTENT_DISPOSITION'): |
176 | 22dab079 | Antony Chazapis | meta['Content-Disposition'] = request.META['HTTP_CONTENT_DISPOSITION'] |
177 | b956618e | Antony Chazapis | if request.META.get('HTTP_X_OBJECT_MANIFEST'): |
178 | b956618e | Antony Chazapis | meta['X-Object-Manifest'] = request.META['HTTP_X_OBJECT_MANIFEST'] |
179 | 3ab38c43 | Antony Chazapis | return meta, get_sharing(request), get_public(request)
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180 | b956618e | Antony Chazapis | |
181 | 3ab38c43 | Antony Chazapis | def put_object_headers(response, meta, restricted=False): |
182 | 4732ed31 | Antony Chazapis | if 'ETag' in meta: |
183 | 4732ed31 | Antony Chazapis | response['ETag'] = meta['ETag'] |
184 | b956618e | Antony Chazapis | response['Content-Length'] = meta['bytes'] |
185 | b956618e | Antony Chazapis | response['Content-Type'] = meta.get('Content-Type', 'application/octet-stream') |
186 | b956618e | Antony Chazapis | response['Last-Modified'] = http_date(int(meta['modified'])) |
187 | 3ab38c43 | Antony Chazapis | if not restricted: |
188 | 4a1c29ea | Antony Chazapis | response['X-Object-Hash'] = meta['hash'] |
189 | 37bee317 | Antony Chazapis | response['X-Object-UUID'] = meta['uuid'] |
190 | 72c3ba3f | Antony Chazapis | response['X-Object-Modified-By'] = smart_str(meta['modified_by'], strings_only=True) |
191 | 7bef5750 | Antony Chazapis | response['X-Object-Version'] = meta['version'] |
192 | 104626e3 | Antony Chazapis | response['X-Object-Version-Timestamp'] = http_date(int(meta['version_timestamp'])) |
193 | 7bef5750 | Antony Chazapis | for k in [x for x in meta.keys() if x.startswith('X-Object-Meta-')]: |
194 | e7b51248 | Sofia Papagiannaki | response[smart_str(k, strings_only=True)] = smart_str(meta[k], strings_only=True) |
195 | 067cf1fc | Antony Chazapis | for k in ('Content-Encoding', 'Content-Disposition', 'X-Object-Manifest', |
196 | 067cf1fc | Antony Chazapis | 'X-Object-Sharing', 'X-Object-Shared-By', 'X-Object-Allowed-To', |
197 | 067cf1fc | Antony Chazapis | 'X-Object-Public'):
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198 | 7bef5750 | Antony Chazapis | if k in meta: |
199 | e7b51248 | Sofia Papagiannaki | response[k] = smart_str(meta[k], strings_only=True)
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200 | 7bef5750 | Antony Chazapis | else:
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201 | c9af0703 | Antony Chazapis | for k in ('Content-Encoding', 'Content-Disposition'): |
202 | 7bef5750 | Antony Chazapis | if k in meta: |
203 | e8d003e8 | Antony Chazapis | response[k] = smart_str(meta[k], strings_only=True)
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204 | b956618e | Antony Chazapis | |
205 | 8cb45c13 | Antony Chazapis | def update_manifest_meta(request, v_account, meta): |
206 | 8cb45c13 | Antony Chazapis | """Update metadata if the object has an X-Object-Manifest."""
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207 | 8cb45c13 | Antony Chazapis | |
208 | 8cb45c13 | Antony Chazapis | if 'X-Object-Manifest' in meta: |
209 | 4a1c29ea | Antony Chazapis | etag = ''
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210 | 8cb45c13 | Antony Chazapis | bytes = 0
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211 | 8cb45c13 | Antony Chazapis | try:
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212 | 6d817842 | Antony Chazapis | src_container, src_name = split_container_object_string('/' + meta['X-Object-Manifest']) |
213 | 61efb530 | Antony Chazapis | objects = request.backend.list_objects(request.user_uniq, v_account, |
214 | 39593b2b | Giorgos Verigakis | src_container, prefix=src_name, virtual=False)
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215 | 8cb45c13 | Antony Chazapis | for x in objects: |
216 | 61efb530 | Antony Chazapis | src_meta = request.backend.get_object_meta(request.user_uniq, |
217 | 91817b22 | chazapis | v_account, src_container, x[0], 'pithos', x[1]) |
218 | 91817b22 | chazapis | if 'ETag' in src_meta: |
219 | 91817b22 | chazapis | etag += src_meta['ETag']
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220 | 8cb45c13 | Antony Chazapis | bytes += src_meta['bytes'] |
221 | 8cb45c13 | Antony Chazapis | except:
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222 | 8cb45c13 | Antony Chazapis | # Ignore errors.
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223 | 8cb45c13 | Antony Chazapis | return
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224 | 8cb45c13 | Antony Chazapis | meta['bytes'] = bytes |
225 | 8cb45c13 | Antony Chazapis | md5 = hashlib.md5() |
226 | 4a1c29ea | Antony Chazapis | md5.update(etag) |
227 | 4a1c29ea | Antony Chazapis | meta['ETag'] = md5.hexdigest().lower()
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228 | 8cb45c13 | Antony Chazapis | |
229 | 067cf1fc | Antony Chazapis | def update_sharing_meta(request, permissions, v_account, v_container, v_object, meta): |
230 | cca6c617 | Antony Chazapis | if permissions is None: |
231 | cca6c617 | Antony Chazapis | return
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232 | 067cf1fc | Antony Chazapis | allowed, perm_path, perms = permissions |
233 | cca6c617 | Antony Chazapis | if len(perms) == 0: |
234 | cca6c617 | Antony Chazapis | return
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235 | 3436eeb0 | Antony Chazapis | ret = [] |
236 | cca6c617 | Antony Chazapis | r = ','.join(perms.get('read', [])) |
237 | 3436eeb0 | Antony Chazapis | if r:
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238 | 3436eeb0 | Antony Chazapis | ret.append('read=' + r)
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239 | cca6c617 | Antony Chazapis | w = ','.join(perms.get('write', [])) |
240 | 3436eeb0 | Antony Chazapis | if w:
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241 | 3436eeb0 | Antony Chazapis | ret.append('write=' + w)
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242 | cca6c617 | Antony Chazapis | meta['X-Object-Sharing'] = '; '.join(ret) |
243 | cca6c617 | Antony Chazapis | if '/'.join((v_account, v_container, v_object)) != perm_path: |
244 | cca6c617 | Antony Chazapis | meta['X-Object-Shared-By'] = perm_path
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245 | 61efb530 | Antony Chazapis | if request.user_uniq != v_account:
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246 | 067cf1fc | Antony Chazapis | meta['X-Object-Allowed-To'] = allowed
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247 | 3436eeb0 | Antony Chazapis | |
248 | e0f916bb | Antony Chazapis | def update_public_meta(public, meta): |
249 | e0f916bb | Antony Chazapis | if not public: |
250 | e0f916bb | Antony Chazapis | return
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251 | bb4eafc6 | Antony Chazapis | meta['X-Object-Public'] = '/public/' + encode_url(public) |
252 | e0f916bb | Antony Chazapis | |
253 | b956618e | Antony Chazapis | def validate_modification_preconditions(request, meta): |
254 | 58a6c894 | Antony Chazapis | """Check that the modified timestamp conforms with the preconditions set."""
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255 | 83dd59c5 | Antony Chazapis | |
256 | 22dab079 | Antony Chazapis | if 'modified' not in meta: |
257 | 22dab079 | Antony Chazapis | return # TODO: Always return? |
258 | 22dab079 | Antony Chazapis | |
259 | b956618e | Antony Chazapis | if_modified_since = request.META.get('HTTP_IF_MODIFIED_SINCE')
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260 | b956618e | Antony Chazapis | if if_modified_since is not None: |
261 | b956618e | Antony Chazapis | if_modified_since = parse_http_date_safe(if_modified_since) |
262 | 22dab079 | Antony Chazapis | if if_modified_since is not None and int(meta['modified']) <= if_modified_since: |
263 | 3e5d2f38 | Antony Chazapis | raise NotModified('Resource has not been modified') |
264 | b956618e | Antony Chazapis | |
265 | b956618e | Antony Chazapis | if_unmodified_since = request.META.get('HTTP_IF_UNMODIFIED_SINCE')
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266 | b956618e | Antony Chazapis | if if_unmodified_since is not None: |
267 | b956618e | Antony Chazapis | if_unmodified_since = parse_http_date_safe(if_unmodified_since) |
268 | 22dab079 | Antony Chazapis | if if_unmodified_since is not None and int(meta['modified']) > if_unmodified_since: |
269 | 3e5d2f38 | Antony Chazapis | raise PreconditionFailed('Resource has been modified') |
270 | b956618e | Antony Chazapis | |
271 | 22dab079 | Antony Chazapis | def validate_matching_preconditions(request, meta): |
272 | 58a6c894 | Antony Chazapis | """Check that the ETag conforms with the preconditions set."""
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273 | 83dd59c5 | Antony Chazapis | |
274 | 4a1c29ea | Antony Chazapis | etag = meta.get('ETag', None) |
275 | 22dab079 | Antony Chazapis | |
276 | 22dab079 | Antony Chazapis | if_match = request.META.get('HTTP_IF_MATCH')
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277 | a8326bef | Antony Chazapis | if if_match is not None: |
278 | 4a1c29ea | Antony Chazapis | if etag is None: |
279 | a8326bef | Antony Chazapis | raise PreconditionFailed('Resource does not exist') |
280 | 4a1c29ea | Antony Chazapis | if if_match != '*' and etag not in [x.lower() for x in parse_etags(if_match)]: |
281 | a8326bef | Antony Chazapis | raise PreconditionFailed('Resource ETag does not match') |
282 | 22dab079 | Antony Chazapis | |
283 | 22dab079 | Antony Chazapis | if_none_match = request.META.get('HTTP_IF_NONE_MATCH')
|
284 | 22dab079 | Antony Chazapis | if if_none_match is not None: |
285 | a8326bef | Antony Chazapis | # TODO: If this passes, must ignore If-Modified-Since header.
|
286 | 4a1c29ea | Antony Chazapis | if etag is not None: |
287 | 4a1c29ea | Antony Chazapis | if if_none_match == '*' or etag in [x.lower() for x in parse_etags(if_none_match)]: |
288 | a8326bef | Antony Chazapis | # TODO: Continue if an If-Modified-Since header is present.
|
289 | a8326bef | Antony Chazapis | if request.method in ('HEAD', 'GET'): |
290 | a8326bef | Antony Chazapis | raise NotModified('Resource ETag matches') |
291 | a8326bef | Antony Chazapis | raise PreconditionFailed('Resource exists or ETag matches') |
292 | 22dab079 | Antony Chazapis | |
293 | 83dd59c5 | Antony Chazapis | def split_container_object_string(s): |
294 | 6d817842 | Antony Chazapis | if not len(s) > 0 or s[0] != '/': |
295 | 6d817842 | Antony Chazapis | raise ValueError |
296 | 6d817842 | Antony Chazapis | s = s[1:]
|
297 | 8cb45c13 | Antony Chazapis | pos = s.find('/')
|
298 | 22d7b01e | Antony Chazapis | if pos == -1 or pos == len(s) - 1: |
299 | 83dd59c5 | Antony Chazapis | raise ValueError |
300 | 8cb45c13 | Antony Chazapis | return s[:pos], s[(pos + 1):] |
301 | 83dd59c5 | Antony Chazapis | |
302 | 79bb41b7 | Antony Chazapis | def copy_or_move_object(request, src_account, src_container, src_name, dest_account, dest_container, dest_name, move=False): |
303 | 58a6c894 | Antony Chazapis | """Copy or move an object."""
|
304 | 22dab079 | Antony Chazapis | |
305 | 3ab38c43 | Antony Chazapis | meta, permissions, public = get_object_headers(request) |
306 | 79bb41b7 | Antony Chazapis | src_version = request.META.get('HTTP_X_SOURCE_VERSION')
|
307 | b956618e | Antony Chazapis | try:
|
308 | b956618e | Antony Chazapis | if move:
|
309 | 61efb530 | Antony Chazapis | version_id = request.backend.move_object(request.user_uniq, src_account, src_container, src_name, |
310 | 79bb41b7 | Antony Chazapis | dest_account, dest_container, dest_name, |
311 | 808cea65 | Antony Chazapis | 'pithos', meta, False, permissions) |
312 | b956618e | Antony Chazapis | else:
|
313 | 61efb530 | Antony Chazapis | version_id = request.backend.copy_object(request.user_uniq, src_account, src_container, src_name, |
314 | 79bb41b7 | Antony Chazapis | dest_account, dest_container, dest_name, |
315 | 808cea65 | Antony Chazapis | 'pithos', meta, False, permissions, src_version) |
316 | cca6c617 | Antony Chazapis | except NotAllowedError:
|
317 | 297513ba | Antony Chazapis | raise Forbidden('Not allowed') |
318 | a8326bef | Antony Chazapis | except (NameError, IndexError): |
319 | b956618e | Antony Chazapis | raise ItemNotFound('Container or object does not exist') |
320 | 3436eeb0 | Antony Chazapis | except ValueError: |
321 | 3436eeb0 | Antony Chazapis | raise BadRequest('Invalid sharing header') |
322 | 1993fea9 | Antony Chazapis | except AttributeError, e: |
323 | a7ba12d7 | Antony Chazapis | raise Conflict('\n'.join(e.data) + '\n') |
324 | 5df6c6d1 | Antony Chazapis | except QuotaError:
|
325 | 5df6c6d1 | Antony Chazapis | raise RequestEntityTooLarge('Quota exceeded') |
326 | e0f916bb | Antony Chazapis | if public is not None: |
327 | e0f916bb | Antony Chazapis | try:
|
328 | 61efb530 | Antony Chazapis | request.backend.update_object_public(request.user_uniq, dest_account, dest_container, dest_name, public) |
329 | e0f916bb | Antony Chazapis | except NotAllowedError:
|
330 | 297513ba | Antony Chazapis | raise Forbidden('Not allowed') |
331 | e0f916bb | Antony Chazapis | except NameError: |
332 | e0f916bb | Antony Chazapis | raise ItemNotFound('Object does not exist') |
333 | 7dd293a0 | Antony Chazapis | return version_id
|
334 | b956618e | Antony Chazapis | |
335 | 1495b972 | Antony Chazapis | def get_int_parameter(p): |
336 | 83dd59c5 | Antony Chazapis | if p is not None: |
337 | 58a6c894 | Antony Chazapis | try:
|
338 | 83dd59c5 | Antony Chazapis | p = int(p)
|
339 | 58a6c894 | Antony Chazapis | except ValueError: |
340 | 58a6c894 | Antony Chazapis | return None |
341 | 83dd59c5 | Antony Chazapis | if p < 0: |
342 | 58a6c894 | Antony Chazapis | return None |
343 | 83dd59c5 | Antony Chazapis | return p
|
344 | 58a6c894 | Antony Chazapis | |
345 | 22dab079 | Antony Chazapis | def get_content_length(request): |
346 | 1495b972 | Antony Chazapis | content_length = get_int_parameter(request.META.get('CONTENT_LENGTH'))
|
347 | 1495b972 | Antony Chazapis | if content_length is None: |
348 | 1495b972 | Antony Chazapis | raise LengthRequired('Missing or invalid Content-Length header') |
349 | 22dab079 | Antony Chazapis | return content_length
|
350 | 22dab079 | Antony Chazapis | |
351 | 22dab079 | Antony Chazapis | def get_range(request, size): |
352 | 58a6c894 | Antony Chazapis | """Parse a Range header from the request.
|
353 | b956618e | Antony Chazapis |
|
354 | 22dab079 | Antony Chazapis | Either returns None, when the header is not existent or should be ignored,
|
355 | 22dab079 | Antony Chazapis | or a list of (offset, length) tuples - should be further checked.
|
356 | b956618e | Antony Chazapis | """
|
357 | 83dd59c5 | Antony Chazapis | |
358 | 22dab079 | Antony Chazapis | ranges = request.META.get('HTTP_RANGE', '').replace(' ', '') |
359 | 22dab079 | Antony Chazapis | if not ranges.startswith('bytes='): |
360 | b956618e | Antony Chazapis | return None |
361 | b956618e | Antony Chazapis | |
362 | 22dab079 | Antony Chazapis | ret = [] |
363 | 22dab079 | Antony Chazapis | for r in (x.strip() for x in ranges[6:].split(',')): |
364 | 22dab079 | Antony Chazapis | p = re.compile('^(?P<offset>\d*)-(?P<upto>\d*)$')
|
365 | 22dab079 | Antony Chazapis | m = p.match(r) |
366 | 22dab079 | Antony Chazapis | if not m: |
367 | 22dab079 | Antony Chazapis | return None |
368 | 22dab079 | Antony Chazapis | offset = m.group('offset')
|
369 | 22dab079 | Antony Chazapis | upto = m.group('upto')
|
370 | 22dab079 | Antony Chazapis | if offset == '' and upto == '': |
371 | b956618e | Antony Chazapis | return None |
372 | b956618e | Antony Chazapis | |
373 | 22dab079 | Antony Chazapis | if offset != '': |
374 | 22dab079 | Antony Chazapis | offset = int(offset)
|
375 | 22dab079 | Antony Chazapis | if upto != '': |
376 | b956618e | Antony Chazapis | upto = int(upto)
|
377 | 22dab079 | Antony Chazapis | if offset > upto:
|
378 | 22dab079 | Antony Chazapis | return None |
379 | 22dab079 | Antony Chazapis | ret.append((offset, upto - offset + 1))
|
380 | 22dab079 | Antony Chazapis | else:
|
381 | 22dab079 | Antony Chazapis | ret.append((offset, size - offset)) |
382 | b956618e | Antony Chazapis | else:
|
383 | 22dab079 | Antony Chazapis | length = int(upto)
|
384 | 22dab079 | Antony Chazapis | ret.append((size - length, length)) |
385 | 22dab079 | Antony Chazapis | |
386 | 22dab079 | Antony Chazapis | return ret
|
387 | 22dab079 | Antony Chazapis | |
388 | 22dab079 | Antony Chazapis | def get_content_range(request): |
389 | 58a6c894 | Antony Chazapis | """Parse a Content-Range header from the request.
|
390 | 22dab079 | Antony Chazapis |
|
391 | 22dab079 | Antony Chazapis | Either returns None, when the header is not existent or should be ignored,
|
392 | 22dab079 | Antony Chazapis | or an (offset, length, total) tuple - check as length, total may be None.
|
393 | 22dab079 | Antony Chazapis | Returns (None, None, None) if the provided range is '*/*'.
|
394 | 22dab079 | Antony Chazapis | """
|
395 | 22dab079 | Antony Chazapis | |
396 | 22dab079 | Antony Chazapis | ranges = request.META.get('HTTP_CONTENT_RANGE', '') |
397 | 22dab079 | Antony Chazapis | if not ranges: |
398 | 22dab079 | Antony Chazapis | return None |
399 | 22dab079 | Antony Chazapis | |
400 | 22dab079 | Antony Chazapis | p = re.compile('^bytes (?P<offset>\d+)-(?P<upto>\d*)/(?P<total>(\d+|\*))$')
|
401 | 22dab079 | Antony Chazapis | m = p.match(ranges) |
402 | 22dab079 | Antony Chazapis | if not m: |
403 | 22dab079 | Antony Chazapis | if ranges == 'bytes */*': |
404 | 22dab079 | Antony Chazapis | return (None, None, None) |
405 | 22dab079 | Antony Chazapis | return None |
406 | 22dab079 | Antony Chazapis | offset = int(m.group('offset')) |
407 | 22dab079 | Antony Chazapis | upto = m.group('upto')
|
408 | 22dab079 | Antony Chazapis | total = m.group('total')
|
409 | 22dab079 | Antony Chazapis | if upto != '': |
410 | 22dab079 | Antony Chazapis | upto = int(upto)
|
411 | b956618e | Antony Chazapis | else:
|
412 | 22dab079 | Antony Chazapis | upto = None
|
413 | 22dab079 | Antony Chazapis | if total != '*': |
414 | 22dab079 | Antony Chazapis | total = int(total)
|
415 | 22dab079 | Antony Chazapis | else:
|
416 | 22dab079 | Antony Chazapis | total = None
|
417 | 70e526a0 | Antony Chazapis | if (upto is not None and offset > upto) or \ |
418 | 70e526a0 | Antony Chazapis | (total is not None and offset >= total) or \ |
419 | 70e526a0 | Antony Chazapis | (total is not None and upto is not None and upto >= total): |
420 | 22dab079 | Antony Chazapis | return None |
421 | 22dab079 | Antony Chazapis | |
422 | 70e526a0 | Antony Chazapis | if upto is None: |
423 | 22dab079 | Antony Chazapis | length = None
|
424 | 22dab079 | Antony Chazapis | else:
|
425 | 22dab079 | Antony Chazapis | length = upto - offset + 1
|
426 | 22dab079 | Antony Chazapis | return (offset, length, total)
|
427 | b956618e | Antony Chazapis | |
428 | 3436eeb0 | Antony Chazapis | def get_sharing(request): |
429 | 3436eeb0 | Antony Chazapis | """Parse an X-Object-Sharing header from the request.
|
430 | 3436eeb0 | Antony Chazapis |
|
431 | 3436eeb0 | Antony Chazapis | Raises BadRequest on error.
|
432 | 3436eeb0 | Antony Chazapis | """
|
433 | 3436eeb0 | Antony Chazapis | |
434 | 3436eeb0 | Antony Chazapis | permissions = request.META.get('HTTP_X_OBJECT_SHARING')
|
435 | cca6c617 | Antony Chazapis | if permissions is None: |
436 | 3436eeb0 | Antony Chazapis | return None |
437 | 3436eeb0 | Antony Chazapis | |
438 | 0a7f1671 | Antony Chazapis | # TODO: Document or remove '~' replacing.
|
439 | 0a7f1671 | Antony Chazapis | permissions = permissions.replace('~', '') |
440 | 0a7f1671 | Antony Chazapis | |
441 | 3436eeb0 | Antony Chazapis | ret = {} |
442 | cca6c617 | Antony Chazapis | permissions = permissions.replace(' ', '') |
443 | cca6c617 | Antony Chazapis | if permissions == '': |
444 | cca6c617 | Antony Chazapis | return ret
|
445 | cca6c617 | Antony Chazapis | for perm in (x for x in permissions.split(';')): |
446 | cca6c617 | Antony Chazapis | if perm.startswith('read='): |
447 | b0a2d1a6 | Antony Chazapis | ret['read'] = list(set([v.replace(' ','').lower() for v in perm[5:].split(',')])) |
448 | 02c0c3fa | Antony Chazapis | if '' in ret['read']: |
449 | 02c0c3fa | Antony Chazapis | ret['read'].remove('') |
450 | e8886082 | Antony Chazapis | if '*' in ret['read']: |
451 | e8886082 | Antony Chazapis | ret['read'] = ['*'] |
452 | 3436eeb0 | Antony Chazapis | if len(ret['read']) == 0: |
453 | 3436eeb0 | Antony Chazapis | raise BadRequest('Bad X-Object-Sharing header value') |
454 | 3436eeb0 | Antony Chazapis | elif perm.startswith('write='): |
455 | b0a2d1a6 | Antony Chazapis | ret['write'] = list(set([v.replace(' ','').lower() for v in perm[6:].split(',')])) |
456 | 02c0c3fa | Antony Chazapis | if '' in ret['write']: |
457 | 02c0c3fa | Antony Chazapis | ret['write'].remove('') |
458 | e8886082 | Antony Chazapis | if '*' in ret['write']: |
459 | e8886082 | Antony Chazapis | ret['write'] = ['*'] |
460 | 3436eeb0 | Antony Chazapis | if len(ret['write']) == 0: |
461 | 3436eeb0 | Antony Chazapis | raise BadRequest('Bad X-Object-Sharing header value') |
462 | 3436eeb0 | Antony Chazapis | else:
|
463 | 3436eeb0 | Antony Chazapis | raise BadRequest('Bad X-Object-Sharing header value') |
464 | 21a8a6ff | Antony Chazapis | |
465 | 21a8a6ff | Antony Chazapis | # Keep duplicates only in write list.
|
466 | 21a8a6ff | Antony Chazapis | dups = [x for x in ret.get('read', []) if x in ret.get('write', []) and x != '*'] |
467 | 21a8a6ff | Antony Chazapis | if dups:
|
468 | 21a8a6ff | Antony Chazapis | for x in dups: |
469 | 21a8a6ff | Antony Chazapis | ret['read'].remove(x)
|
470 | 21a8a6ff | Antony Chazapis | if len(ret['read']) == 0: |
471 | 21a8a6ff | Antony Chazapis | del(ret['read']) |
472 | 21a8a6ff | Antony Chazapis | |
473 | 3436eeb0 | Antony Chazapis | return ret
|
474 | 3436eeb0 | Antony Chazapis | |
475 | 3ab38c43 | Antony Chazapis | def get_public(request): |
476 | 3ab38c43 | Antony Chazapis | """Parse an X-Object-Public header from the request.
|
477 | 3ab38c43 | Antony Chazapis |
|
478 | 3ab38c43 | Antony Chazapis | Raises BadRequest on error.
|
479 | 3ab38c43 | Antony Chazapis | """
|
480 | 3ab38c43 | Antony Chazapis | |
481 | 3ab38c43 | Antony Chazapis | public = request.META.get('HTTP_X_OBJECT_PUBLIC')
|
482 | 3ab38c43 | Antony Chazapis | if public is None: |
483 | 3ab38c43 | Antony Chazapis | return None |
484 | 3ab38c43 | Antony Chazapis | |
485 | 3ab38c43 | Antony Chazapis | public = public.replace(' ', '').lower() |
486 | 3ab38c43 | Antony Chazapis | if public == 'true': |
487 | 3ab38c43 | Antony Chazapis | return True |
488 | 3ab38c43 | Antony Chazapis | elif public == 'false' or public == '': |
489 | 3ab38c43 | Antony Chazapis | return False |
490 | 3ab38c43 | Antony Chazapis | raise BadRequest('Bad X-Object-Public header value') |
491 | 3ab38c43 | Antony Chazapis | |
492 | b956618e | Antony Chazapis | def raw_input_socket(request): |
493 | 58a6c894 | Antony Chazapis | """Return the socket for reading the rest of the request."""
|
494 | 83dd59c5 | Antony Chazapis | |
495 | b956618e | Antony Chazapis | server_software = request.META.get('SERVER_SOFTWARE')
|
496 | fc1b2a75 | Antony Chazapis | if server_software and server_software.startswith('mod_python'): |
497 | b956618e | Antony Chazapis | return request._req
|
498 | fc1b2a75 | Antony Chazapis | if 'wsgi.input' in request.environ: |
499 | fc1b2a75 | Antony Chazapis | return request.environ['wsgi.input'] |
500 | 08de868d | Antony Chazapis | raise NotImplemented('Unknown server software') |
501 | b956618e | Antony Chazapis | |
502 | 07fea84b | Antony Chazapis | MAX_UPLOAD_SIZE = 5 * (1024 * 1024 * 1024) # 5GB |
503 | b956618e | Antony Chazapis | |
504 | c032f34d | Antony Chazapis | def socket_read_iterator(request, length=0, blocksize=4096): |
505 | 58a6c894 | Antony Chazapis | """Return a maximum of blocksize data read from the socket in each iteration.
|
506 | b956618e | Antony Chazapis |
|
507 | 22dab079 | Antony Chazapis | Read up to 'length'. If 'length' is negative, will attempt a chunked read.
|
508 | b956618e | Antony Chazapis | The maximum ammount of data read is controlled by MAX_UPLOAD_SIZE.
|
509 | b956618e | Antony Chazapis | """
|
510 | 83dd59c5 | Antony Chazapis | |
511 | c032f34d | Antony Chazapis | sock = raw_input_socket(request) |
512 | b956618e | Antony Chazapis | if length < 0: # Chunked transfers |
513 | c032f34d | Antony Chazapis | # Small version (server does the dechunking).
|
514 | 032dc768 | Antony Chazapis | if request.environ.get('mod_wsgi.input_chunked', None) or request.META['SERVER_SOFTWARE'].startswith('gunicorn'): |
515 | c032f34d | Antony Chazapis | while length < MAX_UPLOAD_SIZE:
|
516 | c032f34d | Antony Chazapis | data = sock.read(blocksize) |
517 | c032f34d | Antony Chazapis | if data == '': |
518 | c032f34d | Antony Chazapis | return
|
519 | c032f34d | Antony Chazapis | yield data
|
520 | c032f34d | Antony Chazapis | raise BadRequest('Maximum size is reached') |
521 | c032f34d | Antony Chazapis | |
522 | c032f34d | Antony Chazapis | # Long version (do the dechunking).
|
523 | 22dab079 | Antony Chazapis | data = ''
|
524 | b956618e | Antony Chazapis | while length < MAX_UPLOAD_SIZE:
|
525 | 22dab079 | Antony Chazapis | # Get chunk size.
|
526 | 22dab079 | Antony Chazapis | if hasattr(sock, 'readline'): |
527 | 22dab079 | Antony Chazapis | chunk_length = sock.readline() |
528 | 22dab079 | Antony Chazapis | else:
|
529 | 22dab079 | Antony Chazapis | chunk_length = ''
|
530 | 22dab079 | Antony Chazapis | while chunk_length[-1:] != '\n': |
531 | 22dab079 | Antony Chazapis | chunk_length += sock.read(1)
|
532 | 22dab079 | Antony Chazapis | chunk_length.strip() |
533 | b956618e | Antony Chazapis | pos = chunk_length.find(';')
|
534 | b956618e | Antony Chazapis | if pos >= 0: |
535 | b956618e | Antony Chazapis | chunk_length = chunk_length[:pos] |
536 | b956618e | Antony Chazapis | try:
|
537 | b956618e | Antony Chazapis | chunk_length = int(chunk_length, 16) |
538 | b956618e | Antony Chazapis | except Exception, e: |
539 | b956618e | Antony Chazapis | raise BadRequest('Bad chunk size') # TODO: Change to something more appropriate. |
540 | 22dab079 | Antony Chazapis | # Check if done.
|
541 | b956618e | Antony Chazapis | if chunk_length == 0: |
542 | 22dab079 | Antony Chazapis | if len(data) > 0: |
543 | 22dab079 | Antony Chazapis | yield data
|
544 | b956618e | Antony Chazapis | return
|
545 | 22dab079 | Antony Chazapis | # Get the actual data.
|
546 | b956618e | Antony Chazapis | while chunk_length > 0: |
547 | 22dab079 | Antony Chazapis | chunk = sock.read(min(chunk_length, blocksize))
|
548 | 22dab079 | Antony Chazapis | chunk_length -= len(chunk)
|
549 | 623a0cf4 | Sofia Papagiannaki | if length > 0: |
550 | 623a0cf4 | Sofia Papagiannaki | length += len(chunk)
|
551 | 22dab079 | Antony Chazapis | data += chunk |
552 | 22dab079 | Antony Chazapis | if len(data) >= blocksize: |
553 | 22dab079 | Antony Chazapis | ret = data[:blocksize] |
554 | 22dab079 | Antony Chazapis | data = data[blocksize:] |
555 | 22dab079 | Antony Chazapis | yield ret
|
556 | 22dab079 | Antony Chazapis | sock.read(2) # CRLF |
557 | 32a437b1 | Sofia Papagiannaki | raise BadRequest('Maximum size is reached') |
558 | b956618e | Antony Chazapis | else:
|
559 | b956618e | Antony Chazapis | if length > MAX_UPLOAD_SIZE:
|
560 | 32a437b1 | Sofia Papagiannaki | raise BadRequest('Maximum size is reached') |
561 | b956618e | Antony Chazapis | while length > 0: |
562 | b956618e | Antony Chazapis | data = sock.read(min(length, blocksize))
|
563 | 7b25e082 | Antony Chazapis | if not data: |
564 | 7b25e082 | Antony Chazapis | raise BadRequest()
|
565 | b956618e | Antony Chazapis | length -= len(data)
|
566 | b956618e | Antony Chazapis | yield data
|
567 | b956618e | Antony Chazapis | |
568 | 817890f2 | Antony Chazapis | class SaveToBackendHandler(FileUploadHandler): |
569 | 817890f2 | Antony Chazapis | """Handle a file from an HTML form the django way."""
|
570 | 817890f2 | Antony Chazapis | |
571 | 817890f2 | Antony Chazapis | def __init__(self, request=None): |
572 | 817890f2 | Antony Chazapis | super(SaveToBackendHandler, self).__init__(request) |
573 | 817890f2 | Antony Chazapis | self.backend = request.backend
|
574 | 817890f2 | Antony Chazapis | |
575 | 817890f2 | Antony Chazapis | def put_data(self, length): |
576 | 817890f2 | Antony Chazapis | if len(self.data) >= length: |
577 | 817890f2 | Antony Chazapis | block = self.data[:length]
|
578 | 817890f2 | Antony Chazapis | self.file.hashmap.append(self.backend.put_block(block)) |
579 | 817890f2 | Antony Chazapis | self.md5.update(block)
|
580 | 817890f2 | Antony Chazapis | self.data = self.data[length:] |
581 | 817890f2 | Antony Chazapis | |
582 | 817890f2 | Antony Chazapis | def new_file(self, field_name, file_name, content_type, content_length, charset=None): |
583 | 817890f2 | Antony Chazapis | self.md5 = hashlib.md5()
|
584 | 817890f2 | Antony Chazapis | self.data = '' |
585 | 817890f2 | Antony Chazapis | self.file = UploadedFile(name=file_name, content_type=content_type, charset=charset)
|
586 | 817890f2 | Antony Chazapis | self.file.size = 0 |
587 | 817890f2 | Antony Chazapis | self.file.hashmap = []
|
588 | 817890f2 | Antony Chazapis | |
589 | 817890f2 | Antony Chazapis | def receive_data_chunk(self, raw_data, start): |
590 | 817890f2 | Antony Chazapis | self.data += raw_data
|
591 | 817890f2 | Antony Chazapis | self.file.size += len(raw_data) |
592 | 817890f2 | Antony Chazapis | self.put_data(self.request.backend.block_size) |
593 | 817890f2 | Antony Chazapis | return None |
594 | 817890f2 | Antony Chazapis | |
595 | 817890f2 | Antony Chazapis | def file_complete(self, file_size): |
596 | 817890f2 | Antony Chazapis | l = len(self.data) |
597 | 817890f2 | Antony Chazapis | if l > 0: |
598 | 817890f2 | Antony Chazapis | self.put_data(l)
|
599 | 817890f2 | Antony Chazapis | self.file.etag = self.md5.hexdigest().lower() |
600 | 817890f2 | Antony Chazapis | return self.file |
601 | 817890f2 | Antony Chazapis | |
602 | 22dab079 | Antony Chazapis | class ObjectWrapper(object): |
603 | 58a6c894 | Antony Chazapis | """Return the object's data block-per-block in each iteration.
|
604 | 22dab079 | Antony Chazapis |
|
605 | 22dab079 | Antony Chazapis | Read from the object using the offset and length provided in each entry of the range list.
|
606 | 22dab079 | Antony Chazapis | """
|
607 | 22dab079 | Antony Chazapis | |
608 | 39593b2b | Giorgos Verigakis | def __init__(self, backend, ranges, sizes, hashmaps, boundary): |
609 | 39593b2b | Giorgos Verigakis | self.backend = backend
|
610 | 22dab079 | Antony Chazapis | self.ranges = ranges
|
611 | 8cb45c13 | Antony Chazapis | self.sizes = sizes
|
612 | 8cb45c13 | Antony Chazapis | self.hashmaps = hashmaps
|
613 | 22dab079 | Antony Chazapis | self.boundary = boundary
|
614 | 8cb45c13 | Antony Chazapis | self.size = sum(self.sizes) |
615 | 22dab079 | Antony Chazapis | |
616 | 8cb45c13 | Antony Chazapis | self.file_index = 0 |
617 | 8cb45c13 | Antony Chazapis | self.block_index = 0 |
618 | 8cb45c13 | Antony Chazapis | self.block_hash = -1 |
619 | 22dab079 | Antony Chazapis | self.block = '' |
620 | 22dab079 | Antony Chazapis | |
621 | 22dab079 | Antony Chazapis | self.range_index = -1 |
622 | 22dab079 | Antony Chazapis | self.offset, self.length = self.ranges[0] |
623 | 22dab079 | Antony Chazapis | |
624 | 22dab079 | Antony Chazapis | def __iter__(self): |
625 | 22dab079 | Antony Chazapis | return self |
626 | 22dab079 | Antony Chazapis | |
627 | 22dab079 | Antony Chazapis | def part_iterator(self): |
628 | 22dab079 | Antony Chazapis | if self.length > 0: |
629 | 8cb45c13 | Antony Chazapis | # Get the file for the current offset.
|
630 | 8cb45c13 | Antony Chazapis | file_size = self.sizes[self.file_index] |
631 | 8cb45c13 | Antony Chazapis | while self.offset >= file_size: |
632 | 8cb45c13 | Antony Chazapis | self.offset -= file_size
|
633 | 8cb45c13 | Antony Chazapis | self.file_index += 1 |
634 | 8cb45c13 | Antony Chazapis | file_size = self.sizes[self.file_index] |
635 | 8cb45c13 | Antony Chazapis | |
636 | 8cb45c13 | Antony Chazapis | # Get the block for the current position.
|
637 | 39593b2b | Giorgos Verigakis | self.block_index = int(self.offset / self.backend.block_size) |
638 | 8cb45c13 | Antony Chazapis | if self.block_hash != self.hashmaps[self.file_index][self.block_index]: |
639 | 8cb45c13 | Antony Chazapis | self.block_hash = self.hashmaps[self.file_index][self.block_index] |
640 | 22dab079 | Antony Chazapis | try:
|
641 | 39593b2b | Giorgos Verigakis | self.block = self.backend.get_block(self.block_hash) |
642 | 22dab079 | Antony Chazapis | except NameError: |
643 | 22dab079 | Antony Chazapis | raise ItemNotFound('Block does not exist') |
644 | 8cb45c13 | Antony Chazapis | |
645 | 22dab079 | Antony Chazapis | # Get the data from the block.
|
646 | 39593b2b | Giorgos Verigakis | bo = self.offset % self.backend.block_size |
647 | 8cb45c13 | Antony Chazapis | bl = min(self.length, len(self.block) - bo) |
648 | 22dab079 | Antony Chazapis | data = self.block[bo:bo + bl]
|
649 | 22dab079 | Antony Chazapis | self.offset += bl
|
650 | 22dab079 | Antony Chazapis | self.length -= bl
|
651 | 22dab079 | Antony Chazapis | return data
|
652 | 22dab079 | Antony Chazapis | else:
|
653 | 22dab079 | Antony Chazapis | raise StopIteration |
654 | 22dab079 | Antony Chazapis | |
655 | 22dab079 | Antony Chazapis | def next(self): |
656 | 22dab079 | Antony Chazapis | if len(self.ranges) == 1: |
657 | 22dab079 | Antony Chazapis | return self.part_iterator() |
658 | 22dab079 | Antony Chazapis | if self.range_index == len(self.ranges): |
659 | 22dab079 | Antony Chazapis | raise StopIteration |
660 | 22dab079 | Antony Chazapis | try:
|
661 | 22dab079 | Antony Chazapis | if self.range_index == -1: |
662 | 22dab079 | Antony Chazapis | raise StopIteration |
663 | 22dab079 | Antony Chazapis | return self.part_iterator() |
664 | 22dab079 | Antony Chazapis | except StopIteration: |
665 | 22dab079 | Antony Chazapis | self.range_index += 1 |
666 | 22dab079 | Antony Chazapis | out = [] |
667 | 22dab079 | Antony Chazapis | if self.range_index < len(self.ranges): |
668 | 22dab079 | Antony Chazapis | # Part header.
|
669 | 22dab079 | Antony Chazapis | self.offset, self.length = self.ranges[self.range_index] |
670 | 8cb45c13 | Antony Chazapis | self.file_index = 0 |
671 | 22dab079 | Antony Chazapis | if self.range_index > 0: |
672 | 22dab079 | Antony Chazapis | out.append('')
|
673 | 22dab079 | Antony Chazapis | out.append('--' + self.boundary) |
674 | 22dab079 | Antony Chazapis | out.append('Content-Range: bytes %d-%d/%d' % (self.offset, self.offset + self.length - 1, self.size)) |
675 | 22dab079 | Antony Chazapis | out.append('Content-Transfer-Encoding: binary')
|
676 | 22dab079 | Antony Chazapis | out.append('')
|
677 | 22dab079 | Antony Chazapis | out.append('')
|
678 | 22dab079 | Antony Chazapis | return '\r\n'.join(out) |
679 | 22dab079 | Antony Chazapis | else:
|
680 | 22dab079 | Antony Chazapis | # Footer.
|
681 | 22dab079 | Antony Chazapis | out.append('')
|
682 | 22dab079 | Antony Chazapis | out.append('--' + self.boundary + '--') |
683 | 22dab079 | Antony Chazapis | out.append('')
|
684 | 22dab079 | Antony Chazapis | return '\r\n'.join(out) |
685 | 22dab079 | Antony Chazapis | |
686 | 8cb45c13 | Antony Chazapis | def object_data_response(request, sizes, hashmaps, meta, public=False): |
687 | 7bef5750 | Antony Chazapis | """Get the HttpResponse object for replying with the object's data."""
|
688 | 7bef5750 | Antony Chazapis | |
689 | 7bef5750 | Antony Chazapis | # Range handling.
|
690 | 8cb45c13 | Antony Chazapis | size = sum(sizes)
|
691 | 7bef5750 | Antony Chazapis | ranges = get_range(request, size) |
692 | 7bef5750 | Antony Chazapis | if ranges is None: |
693 | 7bef5750 | Antony Chazapis | ranges = [(0, size)]
|
694 | 7bef5750 | Antony Chazapis | ret = 200
|
695 | 7bef5750 | Antony Chazapis | else:
|
696 | 7bef5750 | Antony Chazapis | check = [True for offset, length in ranges if |
697 | 7bef5750 | Antony Chazapis | length <= 0 or length > size or |
698 | 7bef5750 | Antony Chazapis | offset < 0 or offset >= size or |
699 | 7bef5750 | Antony Chazapis | offset + length > size] |
700 | 7bef5750 | Antony Chazapis | if len(check) > 0: |
701 | 6d1e6dce | Sofia Papagiannaki | raise RangeNotSatisfiable('Requested range exceeds object limits') |
702 | 7bef5750 | Antony Chazapis | ret = 206
|
703 | 15d465b8 | Antony Chazapis | if_range = request.META.get('HTTP_IF_RANGE')
|
704 | 15d465b8 | Antony Chazapis | if if_range:
|
705 | 6d1e6dce | Sofia Papagiannaki | try:
|
706 | 15d465b8 | Antony Chazapis | # Modification time has passed instead.
|
707 | 6d1e6dce | Sofia Papagiannaki | last_modified = parse_http_date(if_range) |
708 | 6d1e6dce | Sofia Papagiannaki | if last_modified != meta['modified']: |
709 | 6d1e6dce | Sofia Papagiannaki | ranges = [(0, size)]
|
710 | 6d1e6dce | Sofia Papagiannaki | ret = 200
|
711 | 6d1e6dce | Sofia Papagiannaki | except ValueError: |
712 | 4a1c29ea | Antony Chazapis | if if_range != meta['ETag']: |
713 | 6d1e6dce | Sofia Papagiannaki | ranges = [(0, size)]
|
714 | 6d1e6dce | Sofia Papagiannaki | ret = 200
|
715 | 7bef5750 | Antony Chazapis | |
716 | 7bef5750 | Antony Chazapis | if ret == 206 and len(ranges) > 1: |
717 | 7bef5750 | Antony Chazapis | boundary = uuid.uuid4().hex |
718 | 7bef5750 | Antony Chazapis | else:
|
719 | 7bef5750 | Antony Chazapis | boundary = ''
|
720 | 39593b2b | Giorgos Verigakis | wrapper = ObjectWrapper(request.backend, ranges, sizes, hashmaps, boundary) |
721 | 7bef5750 | Antony Chazapis | response = HttpResponse(wrapper, status=ret) |
722 | 02c0c3fa | Antony Chazapis | put_object_headers(response, meta, public) |
723 | 7bef5750 | Antony Chazapis | if ret == 206: |
724 | 7bef5750 | Antony Chazapis | if len(ranges) == 1: |
725 | 7bef5750 | Antony Chazapis | offset, length = ranges[0]
|
726 | 7bef5750 | Antony Chazapis | response['Content-Length'] = length # Update with the correct length. |
727 | 7bef5750 | Antony Chazapis | response['Content-Range'] = 'bytes %d-%d/%d' % (offset, offset + length - 1, size) |
728 | 7bef5750 | Antony Chazapis | else:
|
729 | 7bef5750 | Antony Chazapis | del(response['Content-Length']) |
730 | 7bef5750 | Antony Chazapis | response['Content-Type'] = 'multipart/byteranges; boundary=%s' % (boundary,) |
731 | 7bef5750 | Antony Chazapis | return response
|
732 | 7bef5750 | Antony Chazapis | |
733 | 39593b2b | Giorgos Verigakis | def put_object_block(request, hashmap, data, offset): |
734 | cb146cf9 | Antony Chazapis | """Put one block of data at the given offset."""
|
735 | cb146cf9 | Antony Chazapis | |
736 | 39593b2b | Giorgos Verigakis | bi = int(offset / request.backend.block_size)
|
737 | 39593b2b | Giorgos Verigakis | bo = offset % request.backend.block_size |
738 | 39593b2b | Giorgos Verigakis | bl = min(len(data), request.backend.block_size - bo) |
739 | cb146cf9 | Antony Chazapis | if bi < len(hashmap): |
740 | 39593b2b | Giorgos Verigakis | hashmap[bi] = request.backend.update_block(hashmap[bi], data[:bl], bo) |
741 | cb146cf9 | Antony Chazapis | else:
|
742 | 39593b2b | Giorgos Verigakis | hashmap.append(request.backend.put_block(('\x00' * bo) + data[:bl]))
|
743 | cb146cf9 | Antony Chazapis | return bl # Return ammount of data written. |
744 | cb146cf9 | Antony Chazapis | |
745 | cddcf432 | chazapis | def hashmap_md5(request, hashmap, size): |
746 | cddcf432 | chazapis | """Produce the MD5 sum from the data in the hashmap."""
|
747 | cddcf432 | chazapis | |
748 | cddcf432 | chazapis | # TODO: Search backend for the MD5 of another object with the same hashmap and size...
|
749 | cddcf432 | chazapis | md5 = hashlib.md5() |
750 | cddcf432 | chazapis | bs = request.backend.block_size |
751 | cddcf432 | chazapis | for bi, hash in enumerate(hashmap): |
752 | cddcf432 | chazapis | data = request.backend.get_block(hash)
|
753 | cddcf432 | chazapis | if bi == len(hashmap) - 1: |
754 | cddcf432 | chazapis | bs = size % bs |
755 | cddcf432 | chazapis | pad = bs - min(len(data), bs) |
756 | cddcf432 | chazapis | md5.update(data + ('\x00' * pad))
|
757 | cddcf432 | chazapis | return md5.hexdigest().lower()
|
758 | 49133392 | Antony Chazapis | |
759 | 228de81b | Antony Chazapis | def get_backend(): |
760 | 228de81b | Antony Chazapis | backend = connect_backend(db_module=settings.BACKEND_DB_MODULE, |
761 | 228de81b | Antony Chazapis | db_connection=settings.BACKEND_DB_CONNECTION, |
762 | 228de81b | Antony Chazapis | block_module=settings.BACKEND_BLOCK_MODULE, |
763 | 228de81b | Antony Chazapis | block_path=settings.BACKEND_BLOCK_PATH) |
764 | 228de81b | Antony Chazapis | backend.default_policy['quota'] = settings.BACKEND_QUOTA
|
765 | 228de81b | Antony Chazapis | backend.default_policy['versioning'] = settings.BACKEND_VERSIONING
|
766 | 228de81b | Antony Chazapis | return backend
|
767 | 228de81b | Antony Chazapis | |
768 | 9fefc052 | Antony Chazapis | def update_request_headers(request): |
769 | 9fefc052 | Antony Chazapis | # Handle URL-encoded keys and values.
|
770 | 88283e9e | Antony Chazapis | # Handle URL-encoded keys and values.
|
771 | 88283e9e | Antony Chazapis | meta = dict([(k, v) for k, v in request.META.iteritems() if k.startswith('HTTP_')]) |
772 | 88283e9e | Antony Chazapis | if len(meta) > 90: |
773 | 88283e9e | Antony Chazapis | raise BadRequest('Too many headers.') |
774 | 88283e9e | Antony Chazapis | for k, v in meta.iteritems(): |
775 | 88283e9e | Antony Chazapis | if len(k) > 128: |
776 | 88283e9e | Antony Chazapis | raise BadRequest('Header name too large.') |
777 | 88283e9e | Antony Chazapis | if len(v) > 256: |
778 | 88283e9e | Antony Chazapis | raise BadRequest('Header value too large.') |
779 | 88283e9e | Antony Chazapis | try:
|
780 | 88283e9e | Antony Chazapis | k.decode('ascii')
|
781 | 88283e9e | Antony Chazapis | v.decode('ascii')
|
782 | 88283e9e | Antony Chazapis | except UnicodeDecodeError: |
783 | 88283e9e | Antony Chazapis | raise BadRequest('Bad character in headers.') |
784 | 88283e9e | Antony Chazapis | if '%' in k or '%' in v: |
785 | 88283e9e | Antony Chazapis | del(request.META[k])
|
786 | 88283e9e | Antony Chazapis | request.META[unquote(k)] = smart_unicode(unquote(v), strings_only=True)
|
787 | 9fefc052 | Antony Chazapis | |
788 | b956618e | Antony Chazapis | def update_response_headers(request, response): |
789 | b956618e | Antony Chazapis | if request.serialization == 'xml': |
790 | b956618e | Antony Chazapis | response['Content-Type'] = 'application/xml; charset=UTF-8' |
791 | b956618e | Antony Chazapis | elif request.serialization == 'json': |
792 | b956618e | Antony Chazapis | response['Content-Type'] = 'application/json; charset=UTF-8' |
793 | 22dab079 | Antony Chazapis | elif not response['Content-Type']: |
794 | b956618e | Antony Chazapis | response['Content-Type'] = 'text/plain; charset=UTF-8' |
795 | b980169d | Antony Chazapis | |
796 | 9fefc052 | Antony Chazapis | if (not response.has_header('Content-Length') and |
797 | 9fefc052 | Antony Chazapis | not (response.has_header('Content-Type') and |
798 | 9fefc052 | Antony Chazapis | response['Content-Type'].startswith('multipart/byteranges'))): |
799 | b980169d | Antony Chazapis | response['Content-Length'] = len(response.content) |
800 | b980169d | Antony Chazapis | |
801 | 9fefc052 | Antony Chazapis | # URL-encode unicode in headers.
|
802 | 9fefc052 | Antony Chazapis | meta = response.items() |
803 | 9fefc052 | Antony Chazapis | for k, v in meta: |
804 | 88283e9e | Antony Chazapis | if (k.startswith('X-Account-') or k.startswith('X-Container-') or |
805 | 88283e9e | Antony Chazapis | k.startswith('X-Object-') or k.startswith('Content-')): |
806 | 9fefc052 | Antony Chazapis | del(response[k])
|
807 | 88283e9e | Antony Chazapis | response[quote(k)] = quote(v, safe='/=,:@; ')
|
808 | 9fefc052 | Antony Chazapis | |
809 | b956618e | Antony Chazapis | if settings.TEST:
|
810 | b956618e | Antony Chazapis | response['Date'] = format_date_time(time())
|
811 | b956618e | Antony Chazapis | |
812 | b956618e | Antony Chazapis | def render_fault(request, fault): |
813 | 08de868d | Antony Chazapis | if isinstance(fault, InternalServerError) and (settings.DEBUG or settings.TEST): |
814 | b956618e | Antony Chazapis | fault.details = format_exc(fault) |
815 | 1993fea9 | Antony Chazapis | |
816 | b956618e | Antony Chazapis | request.serialization = 'text'
|
817 | 08de868d | Antony Chazapis | data = fault.message + '\n'
|
818 | 08de868d | Antony Chazapis | if fault.details:
|
819 | 08de868d | Antony Chazapis | data += '\n' + fault.details
|
820 | b956618e | Antony Chazapis | response = HttpResponse(data, status=fault.code) |
821 | b956618e | Antony Chazapis | update_response_headers(request, response) |
822 | b956618e | Antony Chazapis | return response
|
823 | b956618e | Antony Chazapis | |
824 | b956618e | Antony Chazapis | def request_serialization(request, format_allowed=False): |
825 | 58a6c894 | Antony Chazapis | """Return the serialization format requested.
|
826 | b956618e | Antony Chazapis |
|
827 | b956618e | Antony Chazapis | Valid formats are 'text' and 'json', 'xml' if 'format_allowed' is True.
|
828 | b956618e | Antony Chazapis | """
|
829 | 83dd59c5 | Antony Chazapis | |
830 | b956618e | Antony Chazapis | if not format_allowed: |
831 | b956618e | Antony Chazapis | return 'text' |
832 | b956618e | Antony Chazapis | |
833 | b956618e | Antony Chazapis | format = request.GET.get('format')
|
834 | b956618e | Antony Chazapis | if format == 'json': |
835 | b956618e | Antony Chazapis | return 'json' |
836 | b956618e | Antony Chazapis | elif format == 'xml': |
837 | b956618e | Antony Chazapis | return 'xml' |
838 | b956618e | Antony Chazapis | |
839 | f9f15f92 | Antony Chazapis | for item in request.META.get('HTTP_ACCEPT', '').split(','): |
840 | f9f15f92 | Antony Chazapis | accept, sep, rest = item.strip().partition(';')
|
841 | f9f15f92 | Antony Chazapis | if accept == 'application/json': |
842 | f9f15f92 | Antony Chazapis | return 'json' |
843 | f9f15f92 | Antony Chazapis | elif accept == 'application/xml' or accept == 'text/xml': |
844 | f9f15f92 | Antony Chazapis | return 'xml' |
845 | b956618e | Antony Chazapis | |
846 | b956618e | Antony Chazapis | return 'text' |
847 | b956618e | Antony Chazapis | |
848 | 297513ba | Antony Chazapis | def api_method(http_method=None, format_allowed=False, user_required=True): |
849 | 58a6c894 | Antony Chazapis | """Decorator function for views that implement an API method."""
|
850 | 83dd59c5 | Antony Chazapis | |
851 | b956618e | Antony Chazapis | def decorator(func): |
852 | b956618e | Antony Chazapis | @wraps(func)
|
853 | b956618e | Antony Chazapis | def wrapper(request, *args, **kwargs): |
854 | b956618e | Antony Chazapis | try:
|
855 | b956618e | Antony Chazapis | if http_method and request.method != http_method: |
856 | b956618e | Antony Chazapis | raise BadRequest('Method not allowed.') |
857 | 297513ba | Antony Chazapis | if user_required and getattr(request, 'user', None) is None: |
858 | 297513ba | Antony Chazapis | raise Unauthorized('Access denied') |
859 | 2c22e4ac | Antony Chazapis | |
860 | b956618e | Antony Chazapis | # The args variable may contain up to (account, container, object).
|
861 | b956618e | Antony Chazapis | if len(args) > 1 and len(args[1]) > 256: |
862 | b956618e | Antony Chazapis | raise BadRequest('Container name too large.') |
863 | b956618e | Antony Chazapis | if len(args) > 2 and len(args[2]) > 1024: |
864 | b956618e | Antony Chazapis | raise BadRequest('Object name too large.') |
865 | b956618e | Antony Chazapis | |
866 | 9fefc052 | Antony Chazapis | # Format and check headers.
|
867 | 9fefc052 | Antony Chazapis | update_request_headers(request) |
868 | 9fefc052 | Antony Chazapis | |
869 | b956618e | Antony Chazapis | # Fill in custom request variables.
|
870 | b956618e | Antony Chazapis | request.serialization = request_serialization(request, format_allowed) |
871 | 228de81b | Antony Chazapis | request.backend = get_backend() |
872 | 07813fd6 | Sofia Papagiannaki | |
873 | b956618e | Antony Chazapis | response = func(request, *args, **kwargs) |
874 | b956618e | Antony Chazapis | update_response_headers(request, response) |
875 | b956618e | Antony Chazapis | return response
|
876 | b956618e | Antony Chazapis | except Fault, fault:
|
877 | b956618e | Antony Chazapis | return render_fault(request, fault)
|
878 | b956618e | Antony Chazapis | except BaseException, e: |
879 | b956618e | Antony Chazapis | logger.exception('Unexpected error: %s' % e)
|
880 | 08de868d | Antony Chazapis | fault = InternalServerError('Unexpected error')
|
881 | b956618e | Antony Chazapis | return render_fault(request, fault)
|
882 | 7b25e082 | Antony Chazapis | finally:
|
883 | 297513ba | Antony Chazapis | if getattr(request, 'backend', None) is not None: |
884 | d14fe290 | Antony Chazapis | request.backend.close() |
885 | b956618e | Antony Chazapis | return wrapper
|
886 | b956618e | Antony Chazapis | return decorator |