root / snf-pithos-backend / pithos / backends / lib / sqlalchemy / permissions.py @ 87835e94
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1 | 2e662088 | Antony Chazapis | # Copyright 2011-2012 GRNET S.A. All rights reserved.
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2 | 2715ade4 | Sofia Papagiannaki | #
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3 | 4f917833 | Sofia Papagiannaki | # Redistribution and use in source and binary forms, with or
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4 | 4f917833 | Sofia Papagiannaki | # without modification, are permitted provided that the following
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5 | 4f917833 | Sofia Papagiannaki | # conditions are met:
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6 | 2715ade4 | Sofia Papagiannaki | #
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7 | 4f917833 | Sofia Papagiannaki | # 1. Redistributions of source code must retain the above
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8 | 4f917833 | Sofia Papagiannaki | # copyright notice, this list of conditions and the following
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9 | 4f917833 | Sofia Papagiannaki | # disclaimer.
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10 | 2715ade4 | Sofia Papagiannaki | #
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11 | 4f917833 | Sofia Papagiannaki | # 2. Redistributions in binary form must reproduce the above
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12 | 4f917833 | Sofia Papagiannaki | # copyright notice, this list of conditions and the following
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13 | 4f917833 | Sofia Papagiannaki | # disclaimer in the documentation and/or other materials
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14 | 4f917833 | Sofia Papagiannaki | # provided with the distribution.
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15 | 2715ade4 | Sofia Papagiannaki | #
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16 | 4f917833 | Sofia Papagiannaki | # THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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17 | 4f917833 | Sofia Papagiannaki | # OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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18 | 4f917833 | Sofia Papagiannaki | # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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19 | 4f917833 | Sofia Papagiannaki | # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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20 | 4f917833 | Sofia Papagiannaki | # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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21 | 4f917833 | Sofia Papagiannaki | # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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22 | 4f917833 | Sofia Papagiannaki | # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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23 | 4f917833 | Sofia Papagiannaki | # USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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24 | 4f917833 | Sofia Papagiannaki | # AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 | 4f917833 | Sofia Papagiannaki | # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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26 | 4f917833 | Sofia Papagiannaki | # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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27 | 4f917833 | Sofia Papagiannaki | # POSSIBILITY OF SUCH DAMAGE.
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28 | 2715ade4 | Sofia Papagiannaki | #
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29 | 4f917833 | Sofia Papagiannaki | # The views and conclusions contained in the software and
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30 | 4f917833 | Sofia Papagiannaki | # documentation are those of the authors and should not be
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31 | 4f917833 | Sofia Papagiannaki | # interpreted as representing official policies, either expressed
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32 | 4f917833 | Sofia Papagiannaki | # or implied, of GRNET S.A.
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33 | 4f917833 | Sofia Papagiannaki | |
34 | dc88754b | Nanakos Chrysostomos | from sqlalchemy.sql import select, literal, or_, and_ |
35 | 4f1bc0a6 | Sofia Papagiannaki | from sqlalchemy.sql.expression import join, union |
36 | 4f917833 | Sofia Papagiannaki | |
37 | 4f917833 | Sofia Papagiannaki | from xfeatures import XFeatures |
38 | 4f917833 | Sofia Papagiannaki | from groups import Groups |
39 | 4f917833 | Sofia Papagiannaki | from public import Public |
40 | a63f36a2 | Sofia Papagiannaki | from node import Node |
41 | dc88754b | Nanakos Chrysostomos | from collections import defaultdict |
42 | 4f917833 | Sofia Papagiannaki | |
43 | 235a4227 | Sofia Papagiannaki | from dbworker import ESCAPE_CHAR |
44 | 235a4227 | Sofia Papagiannaki | |
45 | 4f917833 | Sofia Papagiannaki | |
46 | 4f917833 | Sofia Papagiannaki | READ = 0
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47 | 4f917833 | Sofia Papagiannaki | WRITE = 1
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48 | 4f917833 | Sofia Papagiannaki | |
49 | 4f917833 | Sofia Papagiannaki | |
50 | a63f36a2 | Sofia Papagiannaki | class Permissions(XFeatures, Groups, Public, Node): |
51 | 2715ade4 | Sofia Papagiannaki | |
52 | 4f917833 | Sofia Papagiannaki | def __init__(self, **params): |
53 | 4f917833 | Sofia Papagiannaki | XFeatures.__init__(self, **params)
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54 | 4f917833 | Sofia Papagiannaki | Groups.__init__(self, **params)
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55 | 4f917833 | Sofia Papagiannaki | Public.__init__(self, **params)
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56 | a63f36a2 | Sofia Papagiannaki | Node.__init__(self, **params)
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57 | 2715ade4 | Sofia Papagiannaki | |
58 | 4f917833 | Sofia Papagiannaki | def access_grant(self, path, access, members=()): |
59 | 4f917833 | Sofia Papagiannaki | """Grant members with access to path.
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60 | 4f917833 | Sofia Papagiannaki | Members can also be '*' (all),
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61 | 4f917833 | Sofia Papagiannaki | or some group specified as 'owner:group'."""
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62 | 2715ade4 | Sofia Papagiannaki | |
63 | 4f917833 | Sofia Papagiannaki | if not members: |
64 | 4f917833 | Sofia Papagiannaki | return
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65 | 4f917833 | Sofia Papagiannaki | feature = self.xfeature_create(path)
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66 | 4f917833 | Sofia Papagiannaki | self.feature_setmany(feature, access, members)
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67 | 2715ade4 | Sofia Papagiannaki | |
68 | 4f917833 | Sofia Papagiannaki | def access_set(self, path, permissions): |
69 | 4f917833 | Sofia Papagiannaki | """Set permissions for path. The permissions dict
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70 | 4f917833 | Sofia Papagiannaki | maps 'read', 'write' keys to member lists."""
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71 | 2715ade4 | Sofia Papagiannaki | |
72 | cf341da4 | Antony Chazapis | r = permissions.get('read', [])
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73 | cf341da4 | Antony Chazapis | w = permissions.get('write', [])
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74 | cf341da4 | Antony Chazapis | if not r and not w: |
75 | cf341da4 | Antony Chazapis | self.xfeature_destroy(path)
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76 | cf341da4 | Antony Chazapis | return
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77 | cf341da4 | Antony Chazapis | feature = self.xfeature_create(path)
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78 | 345dcf39 | Antony Chazapis | self.feature_clear(feature, READ)
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79 | 345dcf39 | Antony Chazapis | self.feature_clear(feature, WRITE)
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80 | cf341da4 | Antony Chazapis | if r:
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81 | cf341da4 | Antony Chazapis | self.feature_setmany(feature, READ, r)
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82 | cf341da4 | Antony Chazapis | if w:
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83 | cf341da4 | Antony Chazapis | self.feature_setmany(feature, WRITE, w)
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84 | 2715ade4 | Sofia Papagiannaki | |
85 | dc88754b | Nanakos Chrysostomos | def access_get_for_bulk(self, perms): |
86 | dc88754b | Nanakos Chrysostomos | """Get permissions for path."""
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87 | dc88754b | Nanakos Chrysostomos | allowed = None
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88 | dc88754b | Nanakos Chrysostomos | d = defaultdict(list)
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89 | dc88754b | Nanakos Chrysostomos | for value, feature_id, key in perms: |
90 | dc88754b | Nanakos Chrysostomos | d[key].append(value) |
91 | dc88754b | Nanakos Chrysostomos | permissions = d |
92 | dc88754b | Nanakos Chrysostomos | if READ in permissions: |
93 | dc88754b | Nanakos Chrysostomos | allowed = 0
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94 | dc88754b | Nanakos Chrysostomos | permissions['read'] = permissions[READ]
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95 | dc88754b | Nanakos Chrysostomos | del(permissions[READ])
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96 | dc88754b | Nanakos Chrysostomos | if WRITE in permissions: |
97 | dc88754b | Nanakos Chrysostomos | allowed = 1
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98 | dc88754b | Nanakos Chrysostomos | permissions['write'] = permissions[WRITE]
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99 | dc88754b | Nanakos Chrysostomos | del(permissions[WRITE])
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100 | dc88754b | Nanakos Chrysostomos | return (permissions, allowed)
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101 | dc88754b | Nanakos Chrysostomos | |
102 | cf341da4 | Antony Chazapis | def access_get(self, path): |
103 | cf341da4 | Antony Chazapis | """Get permissions for path."""
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104 | 2715ade4 | Sofia Papagiannaki | |
105 | cf341da4 | Antony Chazapis | feature = self.xfeature_get(path)
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106 | cf341da4 | Antony Chazapis | if not feature: |
107 | cf341da4 | Antony Chazapis | return {}
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108 | cf341da4 | Antony Chazapis | permissions = self.feature_dict(feature)
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109 | cf341da4 | Antony Chazapis | if READ in permissions: |
110 | cf341da4 | Antony Chazapis | permissions['read'] = permissions[READ]
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111 | cf341da4 | Antony Chazapis | del(permissions[READ])
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112 | cf341da4 | Antony Chazapis | if WRITE in permissions: |
113 | cf341da4 | Antony Chazapis | permissions['write'] = permissions[WRITE]
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114 | cf341da4 | Antony Chazapis | del(permissions[WRITE])
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115 | cf341da4 | Antony Chazapis | return permissions
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116 | 2715ade4 | Sofia Papagiannaki | |
117 | a74ba506 | Sofia Papagiannaki | def access_members(self, path): |
118 | a74ba506 | Sofia Papagiannaki | feature = self.xfeature_get(path)
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119 | a74ba506 | Sofia Papagiannaki | if not feature: |
120 | a74ba506 | Sofia Papagiannaki | return []
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121 | a74ba506 | Sofia Papagiannaki | permissions = self.feature_dict(feature)
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122 | a74ba506 | Sofia Papagiannaki | members = set()
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123 | a74ba506 | Sofia Papagiannaki | members.update(permissions.get(READ, [])) |
124 | a74ba506 | Sofia Papagiannaki | members.update(permissions.get(WRITE, [])) |
125 | a74ba506 | Sofia Papagiannaki | for m in set(members): |
126 | a74ba506 | Sofia Papagiannaki | parts = m.split(':', 1) |
127 | a74ba506 | Sofia Papagiannaki | if len(parts) != 2: |
128 | a74ba506 | Sofia Papagiannaki | continue
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129 | a74ba506 | Sofia Papagiannaki | user, group = parts |
130 | a74ba506 | Sofia Papagiannaki | members.remove(m) |
131 | a74ba506 | Sofia Papagiannaki | members.update(self.group_members(user, group))
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132 | a74ba506 | Sofia Papagiannaki | return list(members) |
133 | 2715ade4 | Sofia Papagiannaki | |
134 | 4f917833 | Sofia Papagiannaki | def access_clear(self, path): |
135 | 4f917833 | Sofia Papagiannaki | """Revoke access to path (both permissions and public)."""
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136 | 2715ade4 | Sofia Papagiannaki | |
137 | 4f917833 | Sofia Papagiannaki | self.xfeature_destroy(path)
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138 | 4f917833 | Sofia Papagiannaki | self.public_unset(path)
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139 | 2715ade4 | Sofia Papagiannaki | |
140 | 8221c89d | Sofia Papagiannaki | def access_clear_bulk(self, paths): |
141 | 8221c89d | Sofia Papagiannaki | """Revoke access to path (both permissions and public)."""
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142 | 2715ade4 | Sofia Papagiannaki | |
143 | 8221c89d | Sofia Papagiannaki | self.xfeature_destroy_bulk(paths)
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144 | 8221c89d | Sofia Papagiannaki | self.public_unset_bulk(paths)
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145 | 2715ade4 | Sofia Papagiannaki | |
146 | 4f917833 | Sofia Papagiannaki | def access_check(self, path, access, member): |
147 | 4f917833 | Sofia Papagiannaki | """Return true if the member has this access to the path."""
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148 | 2715ade4 | Sofia Papagiannaki | |
149 | cf341da4 | Antony Chazapis | feature = self.xfeature_get(path)
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150 | cf341da4 | Antony Chazapis | if not feature: |
151 | 4f917833 | Sofia Papagiannaki | return False |
152 | 4f917833 | Sofia Papagiannaki | members = self.feature_get(feature, access)
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153 | 4f917833 | Sofia Papagiannaki | if member in members or '*' in members: |
154 | 4f917833 | Sofia Papagiannaki | return True |
155 | 4f917833 | Sofia Papagiannaki | for owner, group in self.group_parents(member): |
156 | 4f917833 | Sofia Papagiannaki | if owner + ':' + group in members: |
157 | 4f917833 | Sofia Papagiannaki | return True |
158 | 4f917833 | Sofia Papagiannaki | return False |
159 | 2715ade4 | Sofia Papagiannaki | |
160 | dc88754b | Nanakos Chrysostomos | def access_check_bulk(self, paths, member): |
161 | dc88754b | Nanakos Chrysostomos | rows = None
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162 | dc88754b | Nanakos Chrysostomos | xfeatures_xfeaturevals = self.xfeaturevals.join(self.xfeatures, |
163 | dc88754b | Nanakos Chrysostomos | onclause=and_(self.xfeatures.c.feature_id ==
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164 | dc88754b | Nanakos Chrysostomos | self.xfeaturevals.c.feature_id, self.xfeatures.c.path.in_(paths))) |
165 | dc88754b | Nanakos Chrysostomos | s = select([self.xfeatures.c.path,
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166 | dc88754b | Nanakos Chrysostomos | self.xfeaturevals.c.value,
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167 | dc88754b | Nanakos Chrysostomos | self.xfeaturevals.c.feature_id,
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168 | dc88754b | Nanakos Chrysostomos | self.xfeaturevals.c.key], from_obj=[xfeatures_xfeaturevals])
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169 | dc88754b | Nanakos Chrysostomos | r = self.conn.execute(s)
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170 | dc88754b | Nanakos Chrysostomos | rows = r.fetchall() |
171 | dc88754b | Nanakos Chrysostomos | r.close() |
172 | dc88754b | Nanakos Chrysostomos | if rows:
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173 | dc88754b | Nanakos Chrysostomos | access_check_paths = {} |
174 | dc88754b | Nanakos Chrysostomos | for path, value, feature_id, key in rows: |
175 | dc88754b | Nanakos Chrysostomos | try:
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176 | dc88754b | Nanakos Chrysostomos | access_check_paths[path].append((value, feature_id, key)) |
177 | dc88754b | Nanakos Chrysostomos | except KeyError: |
178 | dc88754b | Nanakos Chrysostomos | access_check_paths[path] = [(value, feature_id, key)] |
179 | dc88754b | Nanakos Chrysostomos | access_check_paths['group_parents'] = self.group_parents(member) |
180 | dc88754b | Nanakos Chrysostomos | return access_check_paths
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181 | dc88754b | Nanakos Chrysostomos | return None |
182 | dc88754b | Nanakos Chrysostomos | |
183 | 4f917833 | Sofia Papagiannaki | def access_inherit(self, path): |
184 | cf341da4 | Antony Chazapis | """Return the paths influencing the access for path."""
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185 | 2715ade4 | Sofia Papagiannaki | |
186 | d83c93c9 | Antony Chazapis | # r = self.xfeature_inherit(path)
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187 | d83c93c9 | Antony Chazapis | # if not r:
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188 | d83c93c9 | Antony Chazapis | # return []
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189 | d83c93c9 | Antony Chazapis | # # Compute valid.
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190 | d83c93c9 | Antony Chazapis | # return [x[0] for x in r if x[0] in valid]
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191 | 2715ade4 | Sofia Papagiannaki | |
192 | cf341da4 | Antony Chazapis | # Only keep path components.
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193 | cf341da4 | Antony Chazapis | parts = path.rstrip('/').split('/') |
194 | cf341da4 | Antony Chazapis | valid = [] |
195 | cf341da4 | Antony Chazapis | for i in range(1, len(parts)): |
196 | cf341da4 | Antony Chazapis | subp = '/'.join(parts[:i + 1]) |
197 | cf341da4 | Antony Chazapis | valid.append(subp) |
198 | d83c93c9 | Antony Chazapis | if subp != path:
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199 | d83c93c9 | Antony Chazapis | valid.append(subp + '/')
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200 | d83c93c9 | Antony Chazapis | return [x for x in valid if self.xfeature_get(x)] |
201 | 2715ade4 | Sofia Papagiannaki | |
202 | dc88754b | Nanakos Chrysostomos | def access_inherit_bulk(self, paths): |
203 | dc88754b | Nanakos Chrysostomos | """Return the paths influencing the access for path."""
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204 | dc88754b | Nanakos Chrysostomos | |
205 | dc88754b | Nanakos Chrysostomos | # Only keep path components.
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206 | dc88754b | Nanakos Chrysostomos | valid = [] |
207 | dc88754b | Nanakos Chrysostomos | for path in paths: |
208 | dc88754b | Nanakos Chrysostomos | parts = path.rstrip('/').split('/') |
209 | dc88754b | Nanakos Chrysostomos | for i in range(1, len(parts)): |
210 | dc88754b | Nanakos Chrysostomos | subp = '/'.join(parts[:i + 1]) |
211 | dc88754b | Nanakos Chrysostomos | valid.append(subp) |
212 | dc88754b | Nanakos Chrysostomos | if subp != path:
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213 | dc88754b | Nanakos Chrysostomos | valid.append(subp + '/')
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214 | dc88754b | Nanakos Chrysostomos | valid = self.xfeature_get_bulk(valid)
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215 | dc88754b | Nanakos Chrysostomos | return [x[1] for x in valid] |
216 | dc88754b | Nanakos Chrysostomos | |
217 | a63f36a2 | Sofia Papagiannaki | def access_list_paths(self, member, prefix=None, include_owned=False, |
218 | a63f36a2 | Sofia Papagiannaki | include_containers=True):
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219 | a63f36a2 | Sofia Papagiannaki | """Return the list of paths granted to member.
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220 | a63f36a2 | Sofia Papagiannaki |
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221 | a63f36a2 | Sofia Papagiannaki | Keyword arguments:
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222 | a63f36a2 | Sofia Papagiannaki | prefix -- return only paths starting with prefix (default None)
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223 | a63f36a2 | Sofia Papagiannaki | include_owned -- return also paths owned by member (default False)
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224 | a63f36a2 | Sofia Papagiannaki | include_containers -- return also container paths owned by member
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225 | a63f36a2 | Sofia Papagiannaki | (default True)
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226 | a63f36a2 | Sofia Papagiannaki |
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227 | a63f36a2 | Sofia Papagiannaki | """
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228 | 2715ade4 | Sofia Papagiannaki | |
229 | 2715ade4 | Sofia Papagiannaki | xfeatures_xfeaturevals = self.xfeatures.join(self.xfeaturevals) |
230 | 2715ade4 | Sofia Papagiannaki | |
231 | 4f917833 | Sofia Papagiannaki | selectable = (self.groups.c.owner + ':' + self.groups.c.name) |
232 | 4f917833 | Sofia Papagiannaki | member_groups = select([selectable.label('value')],
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233 | 2715ade4 | Sofia Papagiannaki | self.groups.c.member == member)
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234 | 2715ade4 | Sofia Papagiannaki | |
235 | 4f917833 | Sofia Papagiannaki | members = select([literal(member).label('value')])
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236 | f992aa60 | Sofia Papagiannaki | any = select([literal('*').label('value')]) |
237 | 2715ade4 | Sofia Papagiannaki | |
238 | fe232f24 | Sofia Papagiannaki | u = union(member_groups, members, any).alias()
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239 | 4f1bc0a6 | Sofia Papagiannaki | inner_join = join(xfeatures_xfeaturevals, u, |
240 | 2715ade4 | Sofia Papagiannaki | self.xfeaturevals.c.value == u.c.value)
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241 | 4f917833 | Sofia Papagiannaki | s = select([self.xfeatures.c.path], from_obj=[inner_join]).distinct()
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242 | 4f917833 | Sofia Papagiannaki | if prefix:
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243 | 6e0f3e65 | Sofia Papagiannaki | like = lambda p: self.xfeatures.c.path.like( |
244 | 6e0f3e65 | Sofia Papagiannaki | self.escape_like(p) + '%', escape=ESCAPE_CHAR) |
245 | 6e0f3e65 | Sofia Papagiannaki | s = s.where(or_(*map(like,
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246 | 6e0f3e65 | Sofia Papagiannaki | self.access_inherit(prefix) or [prefix]))) |
247 | 4f917833 | Sofia Papagiannaki | r = self.conn.execute(s)
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248 | 4f917833 | Sofia Papagiannaki | l = [row[0] for row in r.fetchall()] |
249 | 4f917833 | Sofia Papagiannaki | r.close() |
250 | a63f36a2 | Sofia Papagiannaki | |
251 | a63f36a2 | Sofia Papagiannaki | if include_owned:
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252 | a63f36a2 | Sofia Papagiannaki | container_nodes = select( |
253 | a63f36a2 | Sofia Papagiannaki | [self.nodes.c.node],
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254 | a63f36a2 | Sofia Papagiannaki | self.nodes.c.parent == self.node_lookup(member)) |
255 | a63f36a2 | Sofia Papagiannaki | condition = self.nodes.c.parent.in_(container_nodes)
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256 | a63f36a2 | Sofia Papagiannaki | if include_containers:
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257 | a63f36a2 | Sofia Papagiannaki | condition = or_(condition, |
258 | a63f36a2 | Sofia Papagiannaki | self.nodes.c.node.in_(container_nodes))
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259 | a63f36a2 | Sofia Papagiannaki | s = select([self.nodes.c.path], condition)
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260 | a63f36a2 | Sofia Papagiannaki | r = self.conn.execute(s)
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261 | a63f36a2 | Sofia Papagiannaki | l += [row[0] for row in r.fetchall() if row[0] not in l] |
262 | a63f36a2 | Sofia Papagiannaki | r.close() |
263 | 4f917833 | Sofia Papagiannaki | return l
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264 | 2715ade4 | Sofia Papagiannaki | |
265 | 4f917833 | Sofia Papagiannaki | def access_list_shared(self, prefix=''): |
266 | 4f917833 | Sofia Papagiannaki | """Return the list of shared paths."""
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267 | 2715ade4 | Sofia Papagiannaki | |
268 | 6e0f3e65 | Sofia Papagiannaki | s = select([self.xfeatures.c.path])
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269 | 6e0f3e65 | Sofia Papagiannaki | like = lambda p: self.xfeatures.c.path.like( |
270 | 6e0f3e65 | Sofia Papagiannaki | self.escape_like(p) + '%', escape=ESCAPE_CHAR) |
271 | 6e0f3e65 | Sofia Papagiannaki | s = s.where(or_(*map(like, self.access_inherit(prefix) or [prefix]))) |
272 | 6e0f3e65 | Sofia Papagiannaki | s = s.order_by(self.xfeatures.c.path.asc())
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273 | 4f917833 | Sofia Papagiannaki | r = self.conn.execute(s)
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274 | 4f917833 | Sofia Papagiannaki | l = [row[0] for row in r.fetchall()] |
275 | 4f917833 | Sofia Papagiannaki | r.close() |
276 | 937dc831 | Antony Chazapis | return l |