root / pithos / api / util.py @ 1c7fc132
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1 | 5635f9ef | Antony Chazapis | # Copyright 2011 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 | 49133392 | Antony Chazapis | from binascii import hexlify |
39 | b956618e | Antony Chazapis | |
40 | b956618e | Antony Chazapis | from django.conf import settings |
41 | b956618e | Antony Chazapis | from django.http import HttpResponse |
42 | 1993fea9 | Antony Chazapis | from django.utils import simplejson as json |
43 | 22dab079 | Antony Chazapis | from django.utils.http import http_date, parse_etags |
44 | b956618e | Antony Chazapis | |
45 | 6d1e6dce | Sofia Papagiannaki | from pithos.api.compat import parse_http_date_safe, parse_http_date |
46 | 02c0c3fa | Antony Chazapis | from pithos.api.faults import (Fault, NotModified, BadRequest, Unauthorized, ItemNotFound, |
47 | 1c7fc132 | Antony Chazapis | Conflict, LengthRequired, PreconditionFailed, RangeNotSatisfiable, |
48 | 02c0c3fa | Antony Chazapis | ServiceUnavailable) |
49 | b956618e | Antony Chazapis | from pithos.backends import backend |
50 | cca6c617 | Antony Chazapis | from pithos.backends.base import NotAllowedError |
51 | b956618e | Antony Chazapis | |
52 | b956618e | Antony Chazapis | import datetime |
53 | b956618e | Antony Chazapis | import logging |
54 | 22dab079 | Antony Chazapis | import re |
55 | cbfb6636 | Sofia Papagiannaki | import hashlib |
56 | 7bef5750 | Antony Chazapis | import uuid |
57 | b956618e | Antony Chazapis | |
58 | b956618e | Antony Chazapis | |
59 | b956618e | Antony Chazapis | logger = logging.getLogger(__name__) |
60 | b956618e | Antony Chazapis | |
61 | b956618e | Antony Chazapis | |
62 | 02c0c3fa | Antony Chazapis | def printable_header_dict(d): |
63 | b956618e | Antony Chazapis | """Format a meta dictionary for printing out json/xml.
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64 | b956618e | Antony Chazapis |
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65 | b956618e | Antony Chazapis | Convert all keys to lower case and replace dashes to underscores.
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66 | b956618e | Antony Chazapis | Change 'modified' key from backend to 'last_modified' and format date.
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67 | b956618e | Antony Chazapis | """
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68 | 83dd59c5 | Antony Chazapis | |
69 | b956618e | Antony Chazapis | if 'modified' in d: |
70 | b956618e | Antony Chazapis | d['last_modified'] = datetime.datetime.fromtimestamp(int(d['modified'])).isoformat() |
71 | b956618e | Antony Chazapis | del(d['modified']) |
72 | b956618e | Antony Chazapis | return dict([(k.lower().replace('-', '_'), v) for k, v in d.iteritems()]) |
73 | b956618e | Antony Chazapis | |
74 | 02c0c3fa | Antony Chazapis | def format_header_key(k): |
75 | 58a6c894 | Antony Chazapis | """Convert underscores to dashes and capitalize intra-dash strings."""
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76 | 83dd59c5 | Antony Chazapis | |
77 | b956618e | Antony Chazapis | return '-'.join([x.capitalize() for x in k.replace('_', '-').split('-')]) |
78 | b956618e | Antony Chazapis | |
79 | 02c0c3fa | Antony Chazapis | def get_header_prefix(request, prefix): |
80 | 02c0c3fa | Antony Chazapis | """Get all prefix-* request headers in a dict. Reformat keys with format_header_key()."""
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81 | 83dd59c5 | Antony Chazapis | |
82 | b956618e | Antony Chazapis | prefix = 'HTTP_' + prefix.upper().replace('-', '_') |
83 | 3ab38c43 | Antony Chazapis | # TODO: Document or remove '~' replacing.
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84 | 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)]) |
85 | 02c0c3fa | Antony Chazapis | |
86 | 02c0c3fa | Antony Chazapis | def get_account_headers(request): |
87 | 02c0c3fa | Antony Chazapis | meta = get_header_prefix(request, 'X-Account-Meta-')
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88 | 02c0c3fa | Antony Chazapis | groups = {} |
89 | 02c0c3fa | Antony Chazapis | for k, v in get_header_prefix(request, 'X-Account-Group-').iteritems(): |
90 | 02c0c3fa | Antony Chazapis | n = k[16:].lower()
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91 | 02c0c3fa | Antony Chazapis | if '-' in n or '_' in n: |
92 | 02c0c3fa | Antony Chazapis | raise BadRequest('Bad characters in group name') |
93 | 02c0c3fa | Antony Chazapis | groups[n] = v.replace(' ', '').split(',') |
94 | 02c0c3fa | Antony Chazapis | if '' in groups[n]: |
95 | 02c0c3fa | Antony Chazapis | groups[n].remove('')
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96 | 02c0c3fa | Antony Chazapis | return meta, groups
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97 | 02c0c3fa | Antony Chazapis | |
98 | 02c0c3fa | Antony Chazapis | def put_account_headers(response, meta, groups): |
99 | b956618e | Antony Chazapis | response['X-Account-Container-Count'] = meta['count'] |
100 | b956618e | Antony Chazapis | response['X-Account-Bytes-Used'] = meta['bytes'] |
101 | b956618e | Antony Chazapis | if 'modified' in meta: |
102 | b956618e | Antony Chazapis | response['Last-Modified'] = http_date(int(meta['modified'])) |
103 | b956618e | Antony Chazapis | for k in [x for x in meta.keys() if x.startswith('X-Account-Meta-')]: |
104 | b956618e | Antony Chazapis | response[k.encode('utf-8')] = meta[k].encode('utf-8') |
105 | 83dd59c5 | Antony Chazapis | if 'until_timestamp' in meta: |
106 | 83dd59c5 | Antony Chazapis | response['X-Account-Until-Timestamp'] = http_date(int(meta['until_timestamp'])) |
107 | 02c0c3fa | Antony Chazapis | for k, v in groups.iteritems(): |
108 | 02c0c3fa | Antony Chazapis | response[format_header_key('X-Account-Group-' + k).encode('utf-8')] = (','.join(v)).encode('utf-8') |
109 | b956618e | Antony Chazapis | |
110 | 02c0c3fa | Antony Chazapis | def get_container_headers(request): |
111 | 02c0c3fa | Antony Chazapis | meta = get_header_prefix(request, 'X-Container-Meta-')
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112 | 3ab38c43 | Antony Chazapis | policy = dict([(k[19:].lower(), v.replace(' ', '')) for k, v in get_header_prefix(request, 'X-Container-Policy-').iteritems()]) |
113 | 3ab38c43 | Antony Chazapis | return meta, policy
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114 | b956618e | Antony Chazapis | |
115 | 3ab38c43 | Antony Chazapis | def put_container_headers(response, meta, policy): |
116 | b956618e | Antony Chazapis | response['X-Container-Object-Count'] = meta['count'] |
117 | b956618e | Antony Chazapis | response['X-Container-Bytes-Used'] = meta['bytes'] |
118 | 58a6c894 | Antony Chazapis | response['Last-Modified'] = http_date(int(meta['modified'])) |
119 | b956618e | Antony Chazapis | for k in [x for x in meta.keys() if x.startswith('X-Container-Meta-')]: |
120 | b956618e | Antony Chazapis | response[k.encode('utf-8')] = meta[k].encode('utf-8') |
121 | 22dab079 | Antony Chazapis | response['X-Container-Object-Meta'] = [x[14:] for x in meta['object_meta'] if x.startswith('X-Object-Meta-')] |
122 | 6bc372a4 | Antony Chazapis | response['X-Container-Block-Size'] = backend.block_size
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123 | 6bc372a4 | Antony Chazapis | response['X-Container-Block-Hash'] = backend.hash_algorithm
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124 | 83dd59c5 | Antony Chazapis | if 'until_timestamp' in meta: |
125 | 83dd59c5 | Antony Chazapis | response['X-Container-Until-Timestamp'] = http_date(int(meta['until_timestamp'])) |
126 | 3ab38c43 | Antony Chazapis | for k, v in policy.iteritems(): |
127 | 3ab38c43 | Antony Chazapis | response[format_header_key('X-Container-Policy-' + k).encode('utf-8')] = v.encode('utf-8') |
128 | b956618e | Antony Chazapis | |
129 | 02c0c3fa | Antony Chazapis | def get_object_headers(request): |
130 | 02c0c3fa | Antony Chazapis | meta = get_header_prefix(request, 'X-Object-Meta-')
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131 | b956618e | Antony Chazapis | if request.META.get('CONTENT_TYPE'): |
132 | b956618e | Antony Chazapis | meta['Content-Type'] = request.META['CONTENT_TYPE'] |
133 | b956618e | Antony Chazapis | if request.META.get('HTTP_CONTENT_ENCODING'): |
134 | b956618e | Antony Chazapis | meta['Content-Encoding'] = request.META['HTTP_CONTENT_ENCODING'] |
135 | 22dab079 | Antony Chazapis | if request.META.get('HTTP_CONTENT_DISPOSITION'): |
136 | 22dab079 | Antony Chazapis | meta['Content-Disposition'] = request.META['HTTP_CONTENT_DISPOSITION'] |
137 | b956618e | Antony Chazapis | if request.META.get('HTTP_X_OBJECT_MANIFEST'): |
138 | b956618e | Antony Chazapis | meta['X-Object-Manifest'] = request.META['HTTP_X_OBJECT_MANIFEST'] |
139 | 3ab38c43 | Antony Chazapis | return meta, get_sharing(request), get_public(request)
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140 | b956618e | Antony Chazapis | |
141 | 3ab38c43 | Antony Chazapis | def put_object_headers(response, meta, restricted=False): |
142 | b956618e | Antony Chazapis | response['ETag'] = meta['hash'] |
143 | b956618e | Antony Chazapis | response['Content-Length'] = meta['bytes'] |
144 | b956618e | Antony Chazapis | response['Content-Type'] = meta.get('Content-Type', 'application/octet-stream') |
145 | b956618e | Antony Chazapis | response['Last-Modified'] = http_date(int(meta['modified'])) |
146 | 3ab38c43 | Antony Chazapis | if not restricted: |
147 | 104626e3 | Antony Chazapis | response['X-Object-Modified-By'] = meta['modified_by'] |
148 | 7bef5750 | Antony Chazapis | response['X-Object-Version'] = meta['version'] |
149 | 104626e3 | Antony Chazapis | response['X-Object-Version-Timestamp'] = http_date(int(meta['version_timestamp'])) |
150 | 7bef5750 | Antony Chazapis | for k in [x for x in meta.keys() if x.startswith('X-Object-Meta-')]: |
151 | 7bef5750 | Antony Chazapis | response[k.encode('utf-8')] = meta[k].encode('utf-8') |
152 | e0f916bb | Antony Chazapis | for k in ('Content-Encoding', 'Content-Disposition', 'X-Object-Manifest', 'X-Object-Sharing', 'X-Object-Shared-By', 'X-Object-Public'): |
153 | 7bef5750 | Antony Chazapis | if k in meta: |
154 | 7bef5750 | Antony Chazapis | response[k] = meta[k] |
155 | 7bef5750 | Antony Chazapis | else:
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156 | c9af0703 | Antony Chazapis | for k in ('Content-Encoding', 'Content-Disposition'): |
157 | 7bef5750 | Antony Chazapis | if k in meta: |
158 | 7bef5750 | Antony Chazapis | response[k] = meta[k] |
159 | b956618e | Antony Chazapis | |
160 | 8cb45c13 | Antony Chazapis | def update_manifest_meta(request, v_account, meta): |
161 | 8cb45c13 | Antony Chazapis | """Update metadata if the object has an X-Object-Manifest."""
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162 | 8cb45c13 | Antony Chazapis | |
163 | 8cb45c13 | Antony Chazapis | if 'X-Object-Manifest' in meta: |
164 | 8cb45c13 | Antony Chazapis | hash = ''
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165 | 8cb45c13 | Antony Chazapis | bytes = 0
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166 | 8cb45c13 | Antony Chazapis | try:
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167 | 6d817842 | Antony Chazapis | src_container, src_name = split_container_object_string('/' + meta['X-Object-Manifest']) |
168 | 8cb45c13 | Antony Chazapis | objects = backend.list_objects(request.user, v_account, src_container, prefix=src_name, virtual=False)
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169 | 8cb45c13 | Antony Chazapis | for x in objects: |
170 | 8cb45c13 | Antony Chazapis | src_meta = backend.get_object_meta(request.user, v_account, src_container, x[0], x[1]) |
171 | 8cb45c13 | Antony Chazapis | hash += src_meta['hash'] |
172 | 8cb45c13 | Antony Chazapis | bytes += src_meta['bytes'] |
173 | 8cb45c13 | Antony Chazapis | except:
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174 | 8cb45c13 | Antony Chazapis | # Ignore errors.
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175 | 8cb45c13 | Antony Chazapis | return
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176 | 8cb45c13 | Antony Chazapis | meta['bytes'] = bytes |
177 | 8cb45c13 | Antony Chazapis | md5 = hashlib.md5() |
178 | 8cb45c13 | Antony Chazapis | md5.update(hash)
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179 | 8cb45c13 | Antony Chazapis | meta['hash'] = md5.hexdigest().lower()
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180 | 8cb45c13 | Antony Chazapis | |
181 | cca6c617 | Antony Chazapis | def update_sharing_meta(permissions, v_account, v_container, v_object, meta): |
182 | cca6c617 | Antony Chazapis | if permissions is None: |
183 | cca6c617 | Antony Chazapis | return
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184 | cca6c617 | Antony Chazapis | perm_path, perms = permissions |
185 | cca6c617 | Antony Chazapis | if len(perms) == 0: |
186 | cca6c617 | Antony Chazapis | return
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187 | 3436eeb0 | Antony Chazapis | ret = [] |
188 | cca6c617 | Antony Chazapis | r = ','.join(perms.get('read', [])) |
189 | 3436eeb0 | Antony Chazapis | if r:
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190 | 3436eeb0 | Antony Chazapis | ret.append('read=' + r)
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191 | cca6c617 | Antony Chazapis | w = ','.join(perms.get('write', [])) |
192 | 3436eeb0 | Antony Chazapis | if w:
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193 | 3436eeb0 | Antony Chazapis | ret.append('write=' + w)
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194 | cca6c617 | Antony Chazapis | meta['X-Object-Sharing'] = '; '.join(ret) |
195 | cca6c617 | Antony Chazapis | if '/'.join((v_account, v_container, v_object)) != perm_path: |
196 | cca6c617 | Antony Chazapis | meta['X-Object-Shared-By'] = perm_path
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197 | 3436eeb0 | Antony Chazapis | |
198 | e0f916bb | Antony Chazapis | def update_public_meta(public, meta): |
199 | e0f916bb | Antony Chazapis | if not public: |
200 | e0f916bb | Antony Chazapis | return
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201 | e0f916bb | Antony Chazapis | meta['X-Object-Public'] = public
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202 | e0f916bb | Antony Chazapis | |
203 | b956618e | Antony Chazapis | def validate_modification_preconditions(request, meta): |
204 | 58a6c894 | Antony Chazapis | """Check that the modified timestamp conforms with the preconditions set."""
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205 | 83dd59c5 | Antony Chazapis | |
206 | 22dab079 | Antony Chazapis | if 'modified' not in meta: |
207 | 22dab079 | Antony Chazapis | return # TODO: Always return? |
208 | 22dab079 | Antony Chazapis | |
209 | b956618e | Antony Chazapis | if_modified_since = request.META.get('HTTP_IF_MODIFIED_SINCE')
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210 | b956618e | Antony Chazapis | if if_modified_since is not None: |
211 | b956618e | Antony Chazapis | if_modified_since = parse_http_date_safe(if_modified_since) |
212 | 22dab079 | Antony Chazapis | if if_modified_since is not None and int(meta['modified']) <= if_modified_since: |
213 | 3e5d2f38 | Antony Chazapis | raise NotModified('Resource has not been modified') |
214 | b956618e | Antony Chazapis | |
215 | b956618e | Antony Chazapis | if_unmodified_since = request.META.get('HTTP_IF_UNMODIFIED_SINCE')
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216 | b956618e | Antony Chazapis | if if_unmodified_since is not None: |
217 | b956618e | Antony Chazapis | if_unmodified_since = parse_http_date_safe(if_unmodified_since) |
218 | 22dab079 | Antony Chazapis | if if_unmodified_since is not None and int(meta['modified']) > if_unmodified_since: |
219 | 3e5d2f38 | Antony Chazapis | raise PreconditionFailed('Resource has been modified') |
220 | b956618e | Antony Chazapis | |
221 | 22dab079 | Antony Chazapis | def validate_matching_preconditions(request, meta): |
222 | 58a6c894 | Antony Chazapis | """Check that the ETag conforms with the preconditions set."""
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223 | 83dd59c5 | Antony Chazapis | |
224 | 22dab079 | Antony Chazapis | if 'hash' not in meta: |
225 | 22dab079 | Antony Chazapis | return # TODO: Always return? |
226 | 22dab079 | Antony Chazapis | |
227 | 22dab079 | Antony Chazapis | if_match = request.META.get('HTTP_IF_MATCH')
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228 | 22dab079 | Antony Chazapis | if if_match is not None and if_match != '*': |
229 | 22dab079 | Antony Chazapis | if meta['hash'] not in [x.lower() for x in parse_etags(if_match)]: |
230 | 3e5d2f38 | Antony Chazapis | raise PreconditionFailed('Resource Etag does not match') |
231 | 22dab079 | Antony Chazapis | |
232 | 22dab079 | Antony Chazapis | if_none_match = request.META.get('HTTP_IF_NONE_MATCH')
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233 | 22dab079 | Antony Chazapis | if if_none_match is not None: |
234 | 22dab079 | Antony Chazapis | if if_none_match == '*' or meta['hash'] in [x.lower() for x in parse_etags(if_none_match)]: |
235 | 3e5d2f38 | Antony Chazapis | raise NotModified('Resource Etag matches') |
236 | 22dab079 | Antony Chazapis | |
237 | 83dd59c5 | Antony Chazapis | def split_container_object_string(s): |
238 | 6d817842 | Antony Chazapis | if not len(s) > 0 or s[0] != '/': |
239 | 6d817842 | Antony Chazapis | raise ValueError |
240 | 6d817842 | Antony Chazapis | s = s[1:]
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241 | 8cb45c13 | Antony Chazapis | pos = s.find('/')
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242 | 8cb45c13 | Antony Chazapis | if pos == -1: |
243 | 83dd59c5 | Antony Chazapis | raise ValueError |
244 | 8cb45c13 | Antony Chazapis | return s[:pos], s[(pos + 1):] |
245 | 83dd59c5 | Antony Chazapis | |
246 | 83dd59c5 | Antony Chazapis | def copy_or_move_object(request, v_account, src_container, src_name, dest_container, dest_name, move=False): |
247 | 58a6c894 | Antony Chazapis | """Copy or move an object."""
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248 | 22dab079 | Antony Chazapis | |
249 | 3ab38c43 | Antony Chazapis | meta, permissions, public = get_object_headers(request) |
250 | a6eb13e9 | Antony Chazapis | src_version = request.META.get('HTTP_X_SOURCE_VERSION')
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251 | b956618e | Antony Chazapis | try:
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252 | b956618e | Antony Chazapis | if move:
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253 | a6eb13e9 | Antony Chazapis | backend.move_object(request.user, v_account, src_container, src_name, dest_container, dest_name, meta, False, permissions)
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254 | b956618e | Antony Chazapis | else:
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255 | a6eb13e9 | Antony Chazapis | backend.copy_object(request.user, v_account, src_container, src_name, dest_container, dest_name, meta, False, permissions, src_version)
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256 | cca6c617 | Antony Chazapis | except NotAllowedError:
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257 | cca6c617 | Antony Chazapis | raise Unauthorized('Access denied') |
258 | e8886082 | Antony Chazapis | except NameError, IndexError: |
259 | b956618e | Antony Chazapis | raise ItemNotFound('Container or object does not exist') |
260 | 3436eeb0 | Antony Chazapis | except ValueError: |
261 | 3436eeb0 | Antony Chazapis | raise BadRequest('Invalid sharing header') |
262 | 1993fea9 | Antony Chazapis | except AttributeError, e: |
263 | 1993fea9 | Antony Chazapis | raise Conflict(json.dumps(e.data))
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264 | e0f916bb | Antony Chazapis | if public is not None: |
265 | e0f916bb | Antony Chazapis | try:
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266 | e0f916bb | Antony Chazapis | backend.update_object_public(request.user, v_account, v_container, v_object, public) |
267 | e0f916bb | Antony Chazapis | except NotAllowedError:
|
268 | e0f916bb | Antony Chazapis | raise Unauthorized('Access denied') |
269 | e0f916bb | Antony Chazapis | except NameError: |
270 | e0f916bb | Antony Chazapis | raise ItemNotFound('Object does not exist') |
271 | b956618e | Antony Chazapis | |
272 | 83dd59c5 | Antony Chazapis | def get_int_parameter(request, name): |
273 | 83dd59c5 | Antony Chazapis | p = request.GET.get(name) |
274 | 83dd59c5 | Antony Chazapis | if p is not None: |
275 | 58a6c894 | Antony Chazapis | try:
|
276 | 83dd59c5 | Antony Chazapis | p = int(p)
|
277 | 58a6c894 | Antony Chazapis | except ValueError: |
278 | 58a6c894 | Antony Chazapis | return None |
279 | 83dd59c5 | Antony Chazapis | if p < 0: |
280 | 58a6c894 | Antony Chazapis | return None |
281 | 83dd59c5 | Antony Chazapis | return p
|
282 | 58a6c894 | Antony Chazapis | |
283 | 22dab079 | Antony Chazapis | def get_content_length(request): |
284 | 22dab079 | Antony Chazapis | content_length = request.META.get('CONTENT_LENGTH')
|
285 | 22dab079 | Antony Chazapis | if not content_length: |
286 | 22dab079 | Antony Chazapis | raise LengthRequired('Missing Content-Length header') |
287 | 22dab079 | Antony Chazapis | try:
|
288 | 22dab079 | Antony Chazapis | content_length = int(content_length)
|
289 | 22dab079 | Antony Chazapis | if content_length < 0: |
290 | 22dab079 | Antony Chazapis | raise ValueError |
291 | 22dab079 | Antony Chazapis | except ValueError: |
292 | 22dab079 | Antony Chazapis | raise BadRequest('Invalid Content-Length header') |
293 | 22dab079 | Antony Chazapis | return content_length
|
294 | 22dab079 | Antony Chazapis | |
295 | 22dab079 | Antony Chazapis | def get_range(request, size): |
296 | 58a6c894 | Antony Chazapis | """Parse a Range header from the request.
|
297 | b956618e | Antony Chazapis |
|
298 | 22dab079 | Antony Chazapis | Either returns None, when the header is not existent or should be ignored,
|
299 | 22dab079 | Antony Chazapis | or a list of (offset, length) tuples - should be further checked.
|
300 | b956618e | Antony Chazapis | """
|
301 | 83dd59c5 | Antony Chazapis | |
302 | 22dab079 | Antony Chazapis | ranges = request.META.get('HTTP_RANGE', '').replace(' ', '') |
303 | 22dab079 | Antony Chazapis | if not ranges.startswith('bytes='): |
304 | b956618e | Antony Chazapis | return None |
305 | b956618e | Antony Chazapis | |
306 | 22dab079 | Antony Chazapis | ret = [] |
307 | 22dab079 | Antony Chazapis | for r in (x.strip() for x in ranges[6:].split(',')): |
308 | 22dab079 | Antony Chazapis | p = re.compile('^(?P<offset>\d*)-(?P<upto>\d*)$')
|
309 | 22dab079 | Antony Chazapis | m = p.match(r) |
310 | 22dab079 | Antony Chazapis | if not m: |
311 | 22dab079 | Antony Chazapis | return None |
312 | 22dab079 | Antony Chazapis | offset = m.group('offset')
|
313 | 22dab079 | Antony Chazapis | upto = m.group('upto')
|
314 | 22dab079 | Antony Chazapis | if offset == '' and upto == '': |
315 | b956618e | Antony Chazapis | return None |
316 | b956618e | Antony Chazapis | |
317 | 22dab079 | Antony Chazapis | if offset != '': |
318 | 22dab079 | Antony Chazapis | offset = int(offset)
|
319 | 22dab079 | Antony Chazapis | if upto != '': |
320 | b956618e | Antony Chazapis | upto = int(upto)
|
321 | 22dab079 | Antony Chazapis | if offset > upto:
|
322 | 22dab079 | Antony Chazapis | return None |
323 | 22dab079 | Antony Chazapis | ret.append((offset, upto - offset + 1))
|
324 | 22dab079 | Antony Chazapis | else:
|
325 | 22dab079 | Antony Chazapis | ret.append((offset, size - offset)) |
326 | b956618e | Antony Chazapis | else:
|
327 | 22dab079 | Antony Chazapis | length = int(upto)
|
328 | 22dab079 | Antony Chazapis | ret.append((size - length, length)) |
329 | 22dab079 | Antony Chazapis | |
330 | 22dab079 | Antony Chazapis | return ret
|
331 | 22dab079 | Antony Chazapis | |
332 | 22dab079 | Antony Chazapis | def get_content_range(request): |
333 | 58a6c894 | Antony Chazapis | """Parse a Content-Range header from the request.
|
334 | 22dab079 | Antony Chazapis |
|
335 | 22dab079 | Antony Chazapis | Either returns None, when the header is not existent or should be ignored,
|
336 | 22dab079 | Antony Chazapis | or an (offset, length, total) tuple - check as length, total may be None.
|
337 | 22dab079 | Antony Chazapis | Returns (None, None, None) if the provided range is '*/*'.
|
338 | 22dab079 | Antony Chazapis | """
|
339 | 22dab079 | Antony Chazapis | |
340 | 22dab079 | Antony Chazapis | ranges = request.META.get('HTTP_CONTENT_RANGE', '') |
341 | 22dab079 | Antony Chazapis | if not ranges: |
342 | 22dab079 | Antony Chazapis | return None |
343 | 22dab079 | Antony Chazapis | |
344 | 22dab079 | Antony Chazapis | p = re.compile('^bytes (?P<offset>\d+)-(?P<upto>\d*)/(?P<total>(\d+|\*))$')
|
345 | 22dab079 | Antony Chazapis | m = p.match(ranges) |
346 | 22dab079 | Antony Chazapis | if not m: |
347 | 22dab079 | Antony Chazapis | if ranges == 'bytes */*': |
348 | 22dab079 | Antony Chazapis | return (None, None, None) |
349 | 22dab079 | Antony Chazapis | return None |
350 | 22dab079 | Antony Chazapis | offset = int(m.group('offset')) |
351 | 22dab079 | Antony Chazapis | upto = m.group('upto')
|
352 | 22dab079 | Antony Chazapis | total = m.group('total')
|
353 | 22dab079 | Antony Chazapis | if upto != '': |
354 | 22dab079 | Antony Chazapis | upto = int(upto)
|
355 | b956618e | Antony Chazapis | else:
|
356 | 22dab079 | Antony Chazapis | upto = None
|
357 | 22dab079 | Antony Chazapis | if total != '*': |
358 | 22dab079 | Antony Chazapis | total = int(total)
|
359 | 22dab079 | Antony Chazapis | else:
|
360 | 22dab079 | Antony Chazapis | total = None
|
361 | 70e526a0 | Antony Chazapis | if (upto is not None and offset > upto) or \ |
362 | 70e526a0 | Antony Chazapis | (total is not None and offset >= total) or \ |
363 | 70e526a0 | Antony Chazapis | (total is not None and upto is not None and upto >= total): |
364 | 22dab079 | Antony Chazapis | return None |
365 | 22dab079 | Antony Chazapis | |
366 | 70e526a0 | Antony Chazapis | if upto is None: |
367 | 22dab079 | Antony Chazapis | length = None
|
368 | 22dab079 | Antony Chazapis | else:
|
369 | 22dab079 | Antony Chazapis | length = upto - offset + 1
|
370 | 22dab079 | Antony Chazapis | return (offset, length, total)
|
371 | b956618e | Antony Chazapis | |
372 | 3436eeb0 | Antony Chazapis | def get_sharing(request): |
373 | 3436eeb0 | Antony Chazapis | """Parse an X-Object-Sharing header from the request.
|
374 | 3436eeb0 | Antony Chazapis |
|
375 | 3436eeb0 | Antony Chazapis | Raises BadRequest on error.
|
376 | 3436eeb0 | Antony Chazapis | """
|
377 | 3436eeb0 | Antony Chazapis | |
378 | 3436eeb0 | Antony Chazapis | permissions = request.META.get('HTTP_X_OBJECT_SHARING')
|
379 | cca6c617 | Antony Chazapis | if permissions is None: |
380 | 3436eeb0 | Antony Chazapis | return None |
381 | 3436eeb0 | Antony Chazapis | |
382 | 3436eeb0 | Antony Chazapis | ret = {} |
383 | cca6c617 | Antony Chazapis | permissions = permissions.replace(' ', '') |
384 | cca6c617 | Antony Chazapis | if permissions == '': |
385 | cca6c617 | Antony Chazapis | return ret
|
386 | cca6c617 | Antony Chazapis | for perm in (x for x in permissions.split(';')): |
387 | cca6c617 | Antony Chazapis | if perm.startswith('read='): |
388 | 02c0c3fa | Antony Chazapis | ret['read'] = [v.replace(' ','').lower() for v in perm[5:].split(',')] |
389 | 02c0c3fa | Antony Chazapis | if '' in ret['read']: |
390 | 02c0c3fa | Antony Chazapis | ret['read'].remove('') |
391 | e8886082 | Antony Chazapis | if '*' in ret['read']: |
392 | e8886082 | Antony Chazapis | ret['read'] = ['*'] |
393 | 3436eeb0 | Antony Chazapis | if len(ret['read']) == 0: |
394 | 3436eeb0 | Antony Chazapis | raise BadRequest('Bad X-Object-Sharing header value') |
395 | 3436eeb0 | Antony Chazapis | elif perm.startswith('write='): |
396 | 02c0c3fa | Antony Chazapis | ret['write'] = [v.replace(' ','').lower() for v in perm[6:].split(',')] |
397 | 02c0c3fa | Antony Chazapis | if '' in ret['write']: |
398 | 02c0c3fa | Antony Chazapis | ret['write'].remove('') |
399 | e8886082 | Antony Chazapis | if '*' in ret['write']: |
400 | e8886082 | Antony Chazapis | ret['write'] = ['*'] |
401 | 3436eeb0 | Antony Chazapis | if len(ret['write']) == 0: |
402 | 3436eeb0 | Antony Chazapis | raise BadRequest('Bad X-Object-Sharing header value') |
403 | 3436eeb0 | Antony Chazapis | else:
|
404 | 3436eeb0 | Antony Chazapis | raise BadRequest('Bad X-Object-Sharing header value') |
405 | 3436eeb0 | Antony Chazapis | return ret
|
406 | 3436eeb0 | Antony Chazapis | |
407 | 3ab38c43 | Antony Chazapis | def get_public(request): |
408 | 3ab38c43 | Antony Chazapis | """Parse an X-Object-Public header from the request.
|
409 | 3ab38c43 | Antony Chazapis |
|
410 | 3ab38c43 | Antony Chazapis | Raises BadRequest on error.
|
411 | 3ab38c43 | Antony Chazapis | """
|
412 | 3ab38c43 | Antony Chazapis | |
413 | 3ab38c43 | Antony Chazapis | public = request.META.get('HTTP_X_OBJECT_PUBLIC')
|
414 | 3ab38c43 | Antony Chazapis | if public is None: |
415 | 3ab38c43 | Antony Chazapis | return None |
416 | 3ab38c43 | Antony Chazapis | |
417 | 3ab38c43 | Antony Chazapis | public = public.replace(' ', '').lower() |
418 | 3ab38c43 | Antony Chazapis | if public == 'true': |
419 | 3ab38c43 | Antony Chazapis | return True |
420 | 3ab38c43 | Antony Chazapis | elif public == 'false' or public == '': |
421 | 3ab38c43 | Antony Chazapis | return False |
422 | 3ab38c43 | Antony Chazapis | raise BadRequest('Bad X-Object-Public header value') |
423 | 3ab38c43 | Antony Chazapis | |
424 | b956618e | Antony Chazapis | def raw_input_socket(request): |
425 | 58a6c894 | Antony Chazapis | """Return the socket for reading the rest of the request."""
|
426 | 83dd59c5 | Antony Chazapis | |
427 | b956618e | Antony Chazapis | server_software = request.META.get('SERVER_SOFTWARE')
|
428 | b956618e | Antony Chazapis | if not server_software: |
429 | b956618e | Antony Chazapis | if 'wsgi.input' in request.environ: |
430 | b956618e | Antony Chazapis | return request.environ['wsgi.input'] |
431 | b956618e | Antony Chazapis | raise ServiceUnavailable('Unknown server software') |
432 | b956618e | Antony Chazapis | if server_software.startswith('WSGIServer'): |
433 | b956618e | Antony Chazapis | return request.environ['wsgi.input'] |
434 | b956618e | Antony Chazapis | elif server_software.startswith('mod_python'): |
435 | b956618e | Antony Chazapis | return request._req
|
436 | b956618e | Antony Chazapis | raise ServiceUnavailable('Unknown server software') |
437 | b956618e | Antony Chazapis | |
438 | b956618e | Antony Chazapis | MAX_UPLOAD_SIZE = 10 * (1024 * 1024) # 10MB |
439 | b956618e | Antony Chazapis | |
440 | 22dab079 | Antony Chazapis | def socket_read_iterator(sock, length=0, blocksize=4096): |
441 | 58a6c894 | Antony Chazapis | """Return a maximum of blocksize data read from the socket in each iteration.
|
442 | b956618e | Antony Chazapis |
|
443 | 22dab079 | Antony Chazapis | Read up to 'length'. If 'length' is negative, will attempt a chunked read.
|
444 | b956618e | Antony Chazapis | The maximum ammount of data read is controlled by MAX_UPLOAD_SIZE.
|
445 | b956618e | Antony Chazapis | """
|
446 | 83dd59c5 | Antony Chazapis | |
447 | b956618e | Antony Chazapis | if length < 0: # Chunked transfers |
448 | 22dab079 | Antony Chazapis | data = ''
|
449 | b956618e | Antony Chazapis | while length < MAX_UPLOAD_SIZE:
|
450 | 22dab079 | Antony Chazapis | # Get chunk size.
|
451 | 22dab079 | Antony Chazapis | if hasattr(sock, 'readline'): |
452 | 22dab079 | Antony Chazapis | chunk_length = sock.readline() |
453 | 22dab079 | Antony Chazapis | else:
|
454 | 22dab079 | Antony Chazapis | chunk_length = ''
|
455 | 22dab079 | Antony Chazapis | while chunk_length[-1:] != '\n': |
456 | 22dab079 | Antony Chazapis | chunk_length += sock.read(1)
|
457 | 22dab079 | Antony Chazapis | chunk_length.strip() |
458 | b956618e | Antony Chazapis | pos = chunk_length.find(';')
|
459 | b956618e | Antony Chazapis | if pos >= 0: |
460 | b956618e | Antony Chazapis | chunk_length = chunk_length[:pos] |
461 | b956618e | Antony Chazapis | try:
|
462 | b956618e | Antony Chazapis | chunk_length = int(chunk_length, 16) |
463 | b956618e | Antony Chazapis | except Exception, e: |
464 | b956618e | Antony Chazapis | raise BadRequest('Bad chunk size') # TODO: Change to something more appropriate. |
465 | 22dab079 | Antony Chazapis | # Check if done.
|
466 | b956618e | Antony Chazapis | if chunk_length == 0: |
467 | 22dab079 | Antony Chazapis | if len(data) > 0: |
468 | 22dab079 | Antony Chazapis | yield data
|
469 | b956618e | Antony Chazapis | return
|
470 | 22dab079 | Antony Chazapis | # Get the actual data.
|
471 | b956618e | Antony Chazapis | while chunk_length > 0: |
472 | 22dab079 | Antony Chazapis | chunk = sock.read(min(chunk_length, blocksize))
|
473 | 22dab079 | Antony Chazapis | chunk_length -= len(chunk)
|
474 | 623a0cf4 | Sofia Papagiannaki | if length > 0: |
475 | 623a0cf4 | Sofia Papagiannaki | length += len(chunk)
|
476 | 22dab079 | Antony Chazapis | data += chunk |
477 | 22dab079 | Antony Chazapis | if len(data) >= blocksize: |
478 | 22dab079 | Antony Chazapis | ret = data[:blocksize] |
479 | 22dab079 | Antony Chazapis | data = data[blocksize:] |
480 | 22dab079 | Antony Chazapis | yield ret
|
481 | 22dab079 | Antony Chazapis | sock.read(2) # CRLF |
482 | b956618e | Antony Chazapis | # TODO: Raise something to note that maximum size is reached.
|
483 | b956618e | Antony Chazapis | else:
|
484 | b956618e | Antony Chazapis | if length > MAX_UPLOAD_SIZE:
|
485 | b956618e | Antony Chazapis | # TODO: Raise something to note that maximum size is reached.
|
486 | b956618e | Antony Chazapis | pass
|
487 | b956618e | Antony Chazapis | while length > 0: |
488 | b956618e | Antony Chazapis | data = sock.read(min(length, blocksize))
|
489 | b956618e | Antony Chazapis | length -= len(data)
|
490 | b956618e | Antony Chazapis | yield data
|
491 | b956618e | Antony Chazapis | |
492 | 22dab079 | Antony Chazapis | class ObjectWrapper(object): |
493 | 58a6c894 | Antony Chazapis | """Return the object's data block-per-block in each iteration.
|
494 | 22dab079 | Antony Chazapis |
|
495 | 22dab079 | Antony Chazapis | Read from the object using the offset and length provided in each entry of the range list.
|
496 | 22dab079 | Antony Chazapis | """
|
497 | 22dab079 | Antony Chazapis | |
498 | 8cb45c13 | Antony Chazapis | def __init__(self, ranges, sizes, hashmaps, boundary): |
499 | 22dab079 | Antony Chazapis | self.ranges = ranges
|
500 | 8cb45c13 | Antony Chazapis | self.sizes = sizes
|
501 | 8cb45c13 | Antony Chazapis | self.hashmaps = hashmaps
|
502 | 22dab079 | Antony Chazapis | self.boundary = boundary
|
503 | 8cb45c13 | Antony Chazapis | self.size = sum(self.sizes) |
504 | 22dab079 | Antony Chazapis | |
505 | 8cb45c13 | Antony Chazapis | self.file_index = 0 |
506 | 8cb45c13 | Antony Chazapis | self.block_index = 0 |
507 | 8cb45c13 | Antony Chazapis | self.block_hash = -1 |
508 | 22dab079 | Antony Chazapis | self.block = '' |
509 | 22dab079 | Antony Chazapis | |
510 | 22dab079 | Antony Chazapis | self.range_index = -1 |
511 | 22dab079 | Antony Chazapis | self.offset, self.length = self.ranges[0] |
512 | 22dab079 | Antony Chazapis | |
513 | 22dab079 | Antony Chazapis | def __iter__(self): |
514 | 22dab079 | Antony Chazapis | return self |
515 | 22dab079 | Antony Chazapis | |
516 | 22dab079 | Antony Chazapis | def part_iterator(self): |
517 | 22dab079 | Antony Chazapis | if self.length > 0: |
518 | 8cb45c13 | Antony Chazapis | # Get the file for the current offset.
|
519 | 8cb45c13 | Antony Chazapis | file_size = self.sizes[self.file_index] |
520 | 8cb45c13 | Antony Chazapis | while self.offset >= file_size: |
521 | 8cb45c13 | Antony Chazapis | self.offset -= file_size
|
522 | 8cb45c13 | Antony Chazapis | self.file_index += 1 |
523 | 8cb45c13 | Antony Chazapis | file_size = self.sizes[self.file_index] |
524 | 8cb45c13 | Antony Chazapis | |
525 | 8cb45c13 | Antony Chazapis | # Get the block for the current position.
|
526 | 8cb45c13 | Antony Chazapis | self.block_index = int(self.offset / backend.block_size) |
527 | 8cb45c13 | Antony Chazapis | if self.block_hash != self.hashmaps[self.file_index][self.block_index]: |
528 | 8cb45c13 | Antony Chazapis | self.block_hash = self.hashmaps[self.file_index][self.block_index] |
529 | 22dab079 | Antony Chazapis | try:
|
530 | 8cb45c13 | Antony Chazapis | self.block = backend.get_block(self.block_hash) |
531 | 22dab079 | Antony Chazapis | except NameError: |
532 | 22dab079 | Antony Chazapis | raise ItemNotFound('Block does not exist') |
533 | 8cb45c13 | Antony Chazapis | |
534 | 22dab079 | Antony Chazapis | # Get the data from the block.
|
535 | 22dab079 | Antony Chazapis | bo = self.offset % backend.block_size
|
536 | 8cb45c13 | Antony Chazapis | bl = min(self.length, len(self.block) - bo) |
537 | 22dab079 | Antony Chazapis | data = self.block[bo:bo + bl]
|
538 | 22dab079 | Antony Chazapis | self.offset += bl
|
539 | 22dab079 | Antony Chazapis | self.length -= bl
|
540 | 22dab079 | Antony Chazapis | return data
|
541 | 22dab079 | Antony Chazapis | else:
|
542 | 22dab079 | Antony Chazapis | raise StopIteration |
543 | 22dab079 | Antony Chazapis | |
544 | 22dab079 | Antony Chazapis | def next(self): |
545 | 22dab079 | Antony Chazapis | if len(self.ranges) == 1: |
546 | 22dab079 | Antony Chazapis | return self.part_iterator() |
547 | 22dab079 | Antony Chazapis | if self.range_index == len(self.ranges): |
548 | 22dab079 | Antony Chazapis | raise StopIteration |
549 | 22dab079 | Antony Chazapis | try:
|
550 | 22dab079 | Antony Chazapis | if self.range_index == -1: |
551 | 22dab079 | Antony Chazapis | raise StopIteration |
552 | 22dab079 | Antony Chazapis | return self.part_iterator() |
553 | 22dab079 | Antony Chazapis | except StopIteration: |
554 | 22dab079 | Antony Chazapis | self.range_index += 1 |
555 | 22dab079 | Antony Chazapis | out = [] |
556 | 22dab079 | Antony Chazapis | if self.range_index < len(self.ranges): |
557 | 22dab079 | Antony Chazapis | # Part header.
|
558 | 22dab079 | Antony Chazapis | self.offset, self.length = self.ranges[self.range_index] |
559 | 8cb45c13 | Antony Chazapis | self.file_index = 0 |
560 | 22dab079 | Antony Chazapis | if self.range_index > 0: |
561 | 22dab079 | Antony Chazapis | out.append('')
|
562 | 22dab079 | Antony Chazapis | out.append('--' + self.boundary) |
563 | 22dab079 | Antony Chazapis | out.append('Content-Range: bytes %d-%d/%d' % (self.offset, self.offset + self.length - 1, self.size)) |
564 | 22dab079 | Antony Chazapis | out.append('Content-Transfer-Encoding: binary')
|
565 | 22dab079 | Antony Chazapis | out.append('')
|
566 | 22dab079 | Antony Chazapis | out.append('')
|
567 | 22dab079 | Antony Chazapis | return '\r\n'.join(out) |
568 | 22dab079 | Antony Chazapis | else:
|
569 | 22dab079 | Antony Chazapis | # Footer.
|
570 | 22dab079 | Antony Chazapis | out.append('')
|
571 | 22dab079 | Antony Chazapis | out.append('--' + self.boundary + '--') |
572 | 22dab079 | Antony Chazapis | out.append('')
|
573 | 22dab079 | Antony Chazapis | return '\r\n'.join(out) |
574 | 22dab079 | Antony Chazapis | |
575 | 8cb45c13 | Antony Chazapis | def object_data_response(request, sizes, hashmaps, meta, public=False): |
576 | 7bef5750 | Antony Chazapis | """Get the HttpResponse object for replying with the object's data."""
|
577 | 7bef5750 | Antony Chazapis | |
578 | 7bef5750 | Antony Chazapis | # Range handling.
|
579 | 8cb45c13 | Antony Chazapis | size = sum(sizes)
|
580 | 7bef5750 | Antony Chazapis | ranges = get_range(request, size) |
581 | 7bef5750 | Antony Chazapis | if ranges is None: |
582 | 7bef5750 | Antony Chazapis | ranges = [(0, size)]
|
583 | 7bef5750 | Antony Chazapis | ret = 200
|
584 | 7bef5750 | Antony Chazapis | else:
|
585 | 7bef5750 | Antony Chazapis | check = [True for offset, length in ranges if |
586 | 7bef5750 | Antony Chazapis | length <= 0 or length > size or |
587 | 7bef5750 | Antony Chazapis | offset < 0 or offset >= size or |
588 | 7bef5750 | Antony Chazapis | offset + length > size] |
589 | 7bef5750 | Antony Chazapis | if len(check) > 0: |
590 | 6d1e6dce | Sofia Papagiannaki | raise RangeNotSatisfiable('Requested range exceeds object limits') |
591 | 7bef5750 | Antony Chazapis | ret = 206
|
592 | 6d1e6dce | Sofia Papagiannaki | if_range = request.META.get('HTTP_IF_RANGE', '') |
593 | 6d1e6dce | Sofia Papagiannaki | if if_range and if_range.startswith('If-Range:'): |
594 | 6d1e6dce | Sofia Papagiannaki | if_range = if_range.split('If-Range:')[1] |
595 | 6d1e6dce | Sofia Papagiannaki | try:
|
596 | 6d1e6dce | Sofia Papagiannaki | # modification time has passed instead
|
597 | 6d1e6dce | Sofia Papagiannaki | last_modified = parse_http_date(if_range) |
598 | 6d1e6dce | Sofia Papagiannaki | if last_modified != meta['modified']: |
599 | 6d1e6dce | Sofia Papagiannaki | ranges = [(0, size)]
|
600 | 6d1e6dce | Sofia Papagiannaki | ret = 200
|
601 | 6d1e6dce | Sofia Papagiannaki | except ValueError: |
602 | 6d1e6dce | Sofia Papagiannaki | if if_range != meta['hash']: |
603 | 6d1e6dce | Sofia Papagiannaki | ranges = [(0, size)]
|
604 | 6d1e6dce | Sofia Papagiannaki | ret = 200
|
605 | 7bef5750 | Antony Chazapis | |
606 | 7bef5750 | Antony Chazapis | if ret == 206 and len(ranges) > 1: |
607 | 7bef5750 | Antony Chazapis | boundary = uuid.uuid4().hex |
608 | 7bef5750 | Antony Chazapis | else:
|
609 | 7bef5750 | Antony Chazapis | boundary = ''
|
610 | 8cb45c13 | Antony Chazapis | wrapper = ObjectWrapper(ranges, sizes, hashmaps, boundary) |
611 | 7bef5750 | Antony Chazapis | response = HttpResponse(wrapper, status=ret) |
612 | 02c0c3fa | Antony Chazapis | put_object_headers(response, meta, public) |
613 | 7bef5750 | Antony Chazapis | if ret == 206: |
614 | 7bef5750 | Antony Chazapis | if len(ranges) == 1: |
615 | 7bef5750 | Antony Chazapis | offset, length = ranges[0]
|
616 | 7bef5750 | Antony Chazapis | response['Content-Length'] = length # Update with the correct length. |
617 | 7bef5750 | Antony Chazapis | response['Content-Range'] = 'bytes %d-%d/%d' % (offset, offset + length - 1, size) |
618 | 7bef5750 | Antony Chazapis | else:
|
619 | 7bef5750 | Antony Chazapis | del(response['Content-Length']) |
620 | 7bef5750 | Antony Chazapis | response['Content-Type'] = 'multipart/byteranges; boundary=%s' % (boundary,) |
621 | 7bef5750 | Antony Chazapis | return response
|
622 | 7bef5750 | Antony Chazapis | |
623 | cb146cf9 | Antony Chazapis | def put_object_block(hashmap, data, offset): |
624 | cb146cf9 | Antony Chazapis | """Put one block of data at the given offset."""
|
625 | cb146cf9 | Antony Chazapis | |
626 | cb146cf9 | Antony Chazapis | bi = int(offset / backend.block_size)
|
627 | cb146cf9 | Antony Chazapis | bo = offset % backend.block_size |
628 | cb146cf9 | Antony Chazapis | bl = min(len(data), backend.block_size - bo) |
629 | cb146cf9 | Antony Chazapis | if bi < len(hashmap): |
630 | cb146cf9 | Antony Chazapis | hashmap[bi] = backend.update_block(hashmap[bi], data[:bl], bo) |
631 | cb146cf9 | Antony Chazapis | else:
|
632 | cb146cf9 | Antony Chazapis | hashmap.append(backend.put_block(('\x00' * bo) + data[:bl]))
|
633 | cb146cf9 | Antony Chazapis | return bl # Return ammount of data written. |
634 | cb146cf9 | Antony Chazapis | |
635 | 49133392 | Antony Chazapis | def hashmap_hash(hashmap): |
636 | 58a6c894 | Antony Chazapis | """Produce the root hash, treating the hashmap as a Merkle-like tree."""
|
637 | 49133392 | Antony Chazapis | |
638 | 49133392 | Antony Chazapis | def subhash(d): |
639 | 49133392 | Antony Chazapis | h = hashlib.new(backend.hash_algorithm) |
640 | 49133392 | Antony Chazapis | h.update(d) |
641 | 49133392 | Antony Chazapis | return h.digest()
|
642 | 49133392 | Antony Chazapis | |
643 | 6ecccd3a | Antony Chazapis | if len(hashmap) == 0: |
644 | 6ecccd3a | Antony Chazapis | return hexlify(subhash('')) |
645 | 6ecccd3a | Antony Chazapis | if len(hashmap) == 1: |
646 | 6ecccd3a | Antony Chazapis | return hexlify(subhash(hashmap[0])) |
647 | 6ecccd3a | Antony Chazapis | s = 2
|
648 | 6ecccd3a | Antony Chazapis | while s < len(hashmap): |
649 | 6ecccd3a | Antony Chazapis | s = s * 2
|
650 | 6ecccd3a | Antony Chazapis | h = hashmap + ([('\x00' * len(hashmap[0]))] * (s - len(hashmap))) |
651 | 49133392 | Antony Chazapis | h = [subhash(h[x] + (h[x + 1] if x + 1 < len(h) else '')) for x in range(0, len(h), 2)] |
652 | 49133392 | Antony Chazapis | while len(h) > 1: |
653 | 49133392 | Antony Chazapis | h = [subhash(h[x] + (h[x + 1] if x + 1 < len(h) else '')) for x in range(0, len(h), 2)] |
654 | 49133392 | Antony Chazapis | return hexlify(h[0]) |
655 | 49133392 | Antony Chazapis | |
656 | b956618e | Antony Chazapis | def update_response_headers(request, response): |
657 | b956618e | Antony Chazapis | if request.serialization == 'xml': |
658 | b956618e | Antony Chazapis | response['Content-Type'] = 'application/xml; charset=UTF-8' |
659 | b956618e | Antony Chazapis | elif request.serialization == 'json': |
660 | b956618e | Antony Chazapis | response['Content-Type'] = 'application/json; charset=UTF-8' |
661 | 22dab079 | Antony Chazapis | elif not response['Content-Type']: |
662 | b956618e | Antony Chazapis | response['Content-Type'] = 'text/plain; charset=UTF-8' |
663 | b956618e | Antony Chazapis | |
664 | b956618e | Antony Chazapis | if settings.TEST:
|
665 | b956618e | Antony Chazapis | response['Date'] = format_date_time(time())
|
666 | b956618e | Antony Chazapis | |
667 | b956618e | Antony Chazapis | def render_fault(request, fault): |
668 | b956618e | Antony Chazapis | if settings.DEBUG or settings.TEST: |
669 | b956618e | Antony Chazapis | fault.details = format_exc(fault) |
670 | 1993fea9 | Antony Chazapis | |
671 | b956618e | Antony Chazapis | request.serialization = 'text'
|
672 | b956618e | Antony Chazapis | data = '\n'.join((fault.message, fault.details)) + '\n' |
673 | b956618e | Antony Chazapis | response = HttpResponse(data, status=fault.code) |
674 | b956618e | Antony Chazapis | update_response_headers(request, response) |
675 | b956618e | Antony Chazapis | return response
|
676 | b956618e | Antony Chazapis | |
677 | b956618e | Antony Chazapis | def request_serialization(request, format_allowed=False): |
678 | 58a6c894 | Antony Chazapis | """Return the serialization format requested.
|
679 | b956618e | Antony Chazapis |
|
680 | b956618e | Antony Chazapis | Valid formats are 'text' and 'json', 'xml' if 'format_allowed' is True.
|
681 | b956618e | Antony Chazapis | """
|
682 | 83dd59c5 | Antony Chazapis | |
683 | b956618e | Antony Chazapis | if not format_allowed: |
684 | b956618e | Antony Chazapis | return 'text' |
685 | b956618e | Antony Chazapis | |
686 | b956618e | Antony Chazapis | format = request.GET.get('format')
|
687 | b956618e | Antony Chazapis | if format == 'json': |
688 | b956618e | Antony Chazapis | return 'json' |
689 | b956618e | Antony Chazapis | elif format == 'xml': |
690 | b956618e | Antony Chazapis | return 'xml' |
691 | b956618e | Antony Chazapis | |
692 | b956618e | Antony Chazapis | for item in request.META.get('HTTP_ACCEPT', '').split(','): |
693 | b956618e | Antony Chazapis | accept, sep, rest = item.strip().partition(';')
|
694 | 22dab079 | Antony Chazapis | if accept == 'application/json': |
695 | b956618e | Antony Chazapis | return 'json' |
696 | b956618e | Antony Chazapis | elif accept == 'application/xml' or accept == 'text/xml': |
697 | b956618e | Antony Chazapis | return 'xml' |
698 | b956618e | Antony Chazapis | |
699 | b956618e | Antony Chazapis | return 'text' |
700 | b956618e | Antony Chazapis | |
701 | b956618e | Antony Chazapis | def api_method(http_method=None, format_allowed=False): |
702 | 58a6c894 | Antony Chazapis | """Decorator function for views that implement an API method."""
|
703 | 83dd59c5 | Antony Chazapis | |
704 | b956618e | Antony Chazapis | def decorator(func): |
705 | b956618e | Antony Chazapis | @wraps(func)
|
706 | b956618e | Antony Chazapis | def wrapper(request, *args, **kwargs): |
707 | b956618e | Antony Chazapis | try:
|
708 | b956618e | Antony Chazapis | if http_method and request.method != http_method: |
709 | b956618e | Antony Chazapis | raise BadRequest('Method not allowed.') |
710 | 2c22e4ac | Antony Chazapis | |
711 | b956618e | Antony Chazapis | # The args variable may contain up to (account, container, object).
|
712 | b956618e | Antony Chazapis | if len(args) > 1 and len(args[1]) > 256: |
713 | b956618e | Antony Chazapis | raise BadRequest('Container name too large.') |
714 | b956618e | Antony Chazapis | if len(args) > 2 and len(args[2]) > 1024: |
715 | b956618e | Antony Chazapis | raise BadRequest('Object name too large.') |
716 | b956618e | Antony Chazapis | |
717 | b956618e | Antony Chazapis | # Fill in custom request variables.
|
718 | b956618e | Antony Chazapis | request.serialization = request_serialization(request, format_allowed) |
719 | b956618e | Antony Chazapis | |
720 | b956618e | Antony Chazapis | response = func(request, *args, **kwargs) |
721 | b956618e | Antony Chazapis | update_response_headers(request, response) |
722 | b956618e | Antony Chazapis | return response
|
723 | b956618e | Antony Chazapis | except Fault, fault:
|
724 | b956618e | Antony Chazapis | return render_fault(request, fault)
|
725 | b956618e | Antony Chazapis | except BaseException, e: |
726 | b956618e | Antony Chazapis | logger.exception('Unexpected error: %s' % e)
|
727 | b956618e | Antony Chazapis | fault = ServiceUnavailable('Unexpected error')
|
728 | b956618e | Antony Chazapis | return render_fault(request, fault)
|
729 | b956618e | Antony Chazapis | return wrapper
|
730 | b956618e | Antony Chazapis | return decorator |