Mercurial > libervia-backend

annotate libervia/backend/memory/cache.py @ 4177:0f1a4ffcd419

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doc (cli/blog): Document new `--alt-link` option
author Goffi <goffi@goffi.org>
date Tue, 05 Dec 2023 13:14:55 +0100
parents 4b842c1fb686
children 5f2d496c633f
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1 #!/usr/bin/env python3
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2
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3
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4 # SAT: a jabber client
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5 # Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.org)
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6
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7 # This program is free software: you can redistribute it and/or modify
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8 # it under the terms of the GNU Affero General Public License as published by
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9 # the Free Software Foundation, either version 3 of the License, or
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10 # (at your option) any later version.
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11
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12 # This program is distributed in the hope that it will be useful,
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13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 # GNU Affero General Public License for more details.
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16
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17 # You should have received a copy of the GNU Affero General Public License
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18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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19
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20 from io import BufferedIOBase
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21 import mimetypes
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22 from pathlib import Path
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23 import pickle as pickle
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24 import time
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25 from typing import Any, Dict, Optional
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26
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27 from libervia.backend.core import exceptions
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28 from libervia.backend.core.constants import Const as C
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29 from libervia.backend.core.i18n import _
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30 from libervia.backend.core.log import getLogger
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31 from libervia.backend.tools.common import regex
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32
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33
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34 log = getLogger(__name__)
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35
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36 DEFAULT_EXT = ".raw"
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37
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38
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39 class Cache(object):
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40 """generic file caching"""
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41
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42 def __init__(self, host, profile):
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43 """
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44 @param profile(unicode, None): name of the profile to set the cache for
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45 if None, the cache will be common for all profiles
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46 """
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47 self.profile = profile
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48 path_elts = [host.memory.config_get("", "local_dir"), C.CACHE_DIR]
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49 if profile:
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50 path_elts.extend(["profiles", regex.path_escape(profile)])
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51 else:
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52 path_elts.append("common")
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53 self.cache_dir = Path(*path_elts)
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54
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55 self.cache_dir.mkdir(0o700, parents=True, exist_ok=True)
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56 self.purge()
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57
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58 def purge(self):
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59 # remove expired files from cache
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60 # TODO: this should not be called only on startup, but at regular interval
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61 # (e.g. once a day)
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62 purged = set()
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63 # we sort files to have metadata files first
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64 for cache_file in sorted(self.cache_dir.iterdir()):
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65 if cache_file in purged:
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66 continue
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67 try:
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68 with cache_file.open('rb') as f:
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69 cache_data = pickle.load(f)
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70 except IOError:
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71 log.warning(
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72 _("Can't read metadata file at {path}")
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73 .format(path=cache_file))
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74 continue
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75 except (pickle.UnpicklingError, EOFError):
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76 log.debug(f"File at {cache_file} is not a metadata file")
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77 continue
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78 try:
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79 eol = cache_data['eol']
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80 filename = cache_data['filename']
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81 except KeyError:
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82 log.warning(
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83 _("Invalid cache metadata at {path}")
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84 .format(path=cache_file))
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85 continue
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86
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87 filepath = self.getPath(filename)
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88
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89 if not filepath.exists():
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90 log.warning(_(
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91 "cache {cache_file!r} references an inexisting file: {filepath!r}"
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92 ).format(cache_file=str(cache_file), filepath=str(filepath)))
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93 log.debug("purging cache with missing file")
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94 cache_file.unlink()
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95 elif eol < time.time():
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96 log.debug(
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97 "purging expired cache {filepath!r} (expired for {time}s)"
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98 .format(filepath=str(filepath), time=int(time.time() - eol))
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99 )
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100 cache_file.unlink()
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101 try:
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102 filepath.unlink()
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103 except FileNotFoundError:
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104 log.warning(
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105 _("following file is missing while purging cache: {path}")
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106 .format(path=filepath)
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107 )
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108 purged.add(cache_file)
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109 purged.add(filepath)
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110
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111 def getPath(self, filename: str) -> Path:
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112 """return cached file URL
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113
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114 @param filename: cached file name (cache data or actual file)
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115 @return: path to the cached file
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116 """
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117 if not filename or "/" in filename:
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118 log.error(
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119 "invalid char found in file name, hack attempt? name:{}".format(filename)
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120 )
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121 raise exceptions.DataError("Invalid char found")
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122 return self.cache_dir / filename
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123
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124 def get_metadata(self, uid: str, update_eol: bool = True) -> Optional[Dict[str, Any]]:
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125 """Retrieve metadata for cached data
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126
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127 @param uid(unicode): unique identifier of file
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128 @param update_eol(bool): True if eol must extended
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129 if True, max_age will be added to eol (only if it is not already expired)
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130 @return (dict, None): metadata with following keys:
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131 see [cache_data] for data details, an additional "path" key is the full path to
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132 cached file.
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133 None if file is not in cache (or cache is invalid)
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134 """
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135
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parents: 2109
diff changeset
136 uid = uid.strip()
766dbbec56f2 core (memory/cache): geFilePath now return None when uid is empty
Goffi <goffi@goffi.org>
parents: 2109
diff changeset
137 if not uid:
3028
ab2696e34d29 Python 3 port:
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parents: 2771
diff changeset
138 raise exceptions.InternalError("uid must not be empty")
2109
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parents:
diff changeset
139 cache_url = self.getPath(uid)
3188
a15773c6c273 memory(cache): extend EOL when a file metadata is retrieved
Goffi <goffi@goffi.org>
parents: 3185
diff changeset
140 if not cache_url.exists():
2109
85f3e12e984d core (memory/cache): file caching handling, first draft:
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parents:
diff changeset
141 return None
85f3e12e984d core (memory/cache): file caching handling, first draft:
Goffi <goffi@goffi.org>
parents:
diff changeset
142
85f3e12e984d core (memory/cache): file caching handling, first draft:
Goffi <goffi@goffi.org>
parents:
diff changeset
143 try:
3185
554b3b632378 memory (cache): purge + pathlib:
Goffi <goffi@goffi.org>
parents: 3137
diff changeset
144 with cache_url.open("rb") as f:
2109
85f3e12e984d core (memory/cache): file caching handling, first draft:
Goffi <goffi@goffi.org>
parents:
diff changeset
145 cache_data = pickle.load(f)
3572
b3fa179417e7 core (memory/cache): don't crash on EOFError in getMetadata
Goffi <goffi@goffi.org>
parents: 3479
diff changeset
146 except (IOError, EOFError) as e:
3188
a15773c6c273 memory(cache): extend EOL when a file metadata is retrieved
Goffi <goffi@goffi.org>
parents: 3185
diff changeset
147 log.warning(f"can't read cache at {cache_url}: {e}")
2109
85f3e12e984d core (memory/cache): file caching handling, first draft:
Goffi <goffi@goffi.org>
parents:
diff changeset
148 return None
85f3e12e984d core (memory/cache): file caching handling, first draft:
Goffi <goffi@goffi.org>
parents:
diff changeset
149 except pickle.UnpicklingError:
3188
a15773c6c273 memory(cache): extend EOL when a file metadata is retrieved
Goffi <goffi@goffi.org>
parents: 3185
diff changeset
150 log.warning(f"invalid cache found at {cache_url}")
2109
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Goffi <goffi@goffi.org>
parents:
diff changeset
151 return None
85f3e12e984d core (memory/cache): file caching handling, first draft:
Goffi <goffi@goffi.org>
parents:
diff changeset
152
85f3e12e984d core (memory/cache): file caching handling, first draft:
Goffi <goffi@goffi.org>
parents:
diff changeset
153 try:
2624
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parents: 2562
diff changeset
154 eol = cache_data["eol"]
2109
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parents:
diff changeset
155 except KeyError:
3028
ab2696e34d29 Python 3 port:
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parents: 2771
diff changeset
156 log.warning("no End Of Life found for cached file {}".format(uid))
2109
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parents:
diff changeset
157 eol = 0
85f3e12e984d core (memory/cache): file caching handling, first draft:
Goffi <goffi@goffi.org>
parents:
diff changeset
158 if eol < time.time():
2624
56f94936df1e code style reformatting using black
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parents: 2562
diff changeset
159 log.debug(
3028
ab2696e34d29 Python 3 port:
Goffi <goffi@goffi.org>
parents: 2771
diff changeset
160 "removing expired cache (expired for {}s)".format(time.time() - eol)
2624
56f94936df1e code style reformatting using black
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
161 )
2109
85f3e12e984d core (memory/cache): file caching handling, first draft:
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parents:
diff changeset
162 return None
85f3e12e984d core (memory/cache): file caching handling, first draft:
Goffi <goffi@goffi.org>
parents:
diff changeset
163
3188
a15773c6c273 memory(cache): extend EOL when a file metadata is retrieved
Goffi <goffi@goffi.org>
parents: 3185
diff changeset
164 if update_eol:
a15773c6c273 memory(cache): extend EOL when a file metadata is retrieved
Goffi <goffi@goffi.org>
parents: 3185
diff changeset
165 try:
a15773c6c273 memory(cache): extend EOL when a file metadata is retrieved
Goffi <goffi@goffi.org>
parents: 3185
diff changeset
166 max_age = cache_data["max_age"]
a15773c6c273 memory(cache): extend EOL when a file metadata is retrieved
Goffi <goffi@goffi.org>
parents: 3185
diff changeset
167 except KeyError:
a15773c6c273 memory(cache): extend EOL when a file metadata is retrieved
Goffi <goffi@goffi.org>
parents: 3185
diff changeset
168 log.warning(f"no max_age found for cache at {cache_url}, using default")
a15773c6c273 memory(cache): extend EOL when a file metadata is retrieved
Goffi <goffi@goffi.org>
parents: 3185
diff changeset
169 max_age = cache_data["max_age"] = C.DEFAULT_MAX_AGE
3198
08151c103636 core (memory/cache): added some metadata:
Goffi <goffi@goffi.org>
parents: 3188
diff changeset
170 now = int(time.time())
08151c103636 core (memory/cache): added some metadata:
Goffi <goffi@goffi.org>
parents: 3188
diff changeset
171 cache_data["last_access"] = now
08151c103636 core (memory/cache): added some metadata:
Goffi <goffi@goffi.org>
parents: 3188
diff changeset
172 cache_data["eol"] = now + max_age
3188
a15773c6c273 memory(cache): extend EOL when a file metadata is retrieved
Goffi <goffi@goffi.org>
parents: 3185
diff changeset
173 with cache_url.open("wb") as f:
a15773c6c273 memory(cache): extend EOL when a file metadata is retrieved
Goffi <goffi@goffi.org>
parents: 3185
diff changeset
174 pickle.dump(cache_data, f, protocol=2)
a15773c6c273 memory(cache): extend EOL when a file metadata is retrieved
Goffi <goffi@goffi.org>
parents: 3185
diff changeset
175
2624
56f94936df1e code style reformatting using black
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
176 cache_data["path"] = self.getPath(cache_data["filename"])
2517
cd7a53c31eb6 core (memory/cache): new getMetadata method to retrieve metadata without opening the file
Goffi <goffi@goffi.org>
parents: 2509
diff changeset
177 return cache_data
cd7a53c31eb6 core (memory/cache): new getMetadata method to retrieve metadata without opening the file
Goffi <goffi@goffi.org>
parents: 2509
diff changeset
178
4037
524856bd7b19 massive refactoring to switch from camelCase to snake_case:
Goffi <goffi@goffi.org>
parents: 3818
diff changeset
179 def get_file_path(self, uid: str) -> Path:
3185
554b3b632378 memory (cache): purge + pathlib:
Goffi <goffi@goffi.org>
parents: 3137
diff changeset
180 """Retrieve absolute path to file
2517
cd7a53c31eb6 core (memory/cache): new getMetadata method to retrieve metadata without opening the file
Goffi <goffi@goffi.org>
parents: 2509
diff changeset
181
cd7a53c31eb6 core (memory/cache): new getMetadata method to retrieve metadata without opening the file
Goffi <goffi@goffi.org>
parents: 2509
diff changeset
182 @param uid(unicode): unique identifier of file
cd7a53c31eb6 core (memory/cache): new getMetadata method to retrieve metadata without opening the file
Goffi <goffi@goffi.org>
parents: 2509
diff changeset
183 @return (unicode, None): absolute path to cached file
cd7a53c31eb6 core (memory/cache): new getMetadata method to retrieve metadata without opening the file
Goffi <goffi@goffi.org>
parents: 2509
diff changeset
184 None if file is not in cache (or cache is invalid)
cd7a53c31eb6 core (memory/cache): new getMetadata method to retrieve metadata without opening the file
Goffi <goffi@goffi.org>
parents: 2509
diff changeset
185 """
4037
524856bd7b19 massive refactoring to switch from camelCase to snake_case:
Goffi <goffi@goffi.org>
parents: 3818
diff changeset
186 metadata = self.get_metadata(uid)
2517
cd7a53c31eb6 core (memory/cache): new getMetadata method to retrieve metadata without opening the file
Goffi <goffi@goffi.org>
parents: 2509
diff changeset
187 if metadata is not None:
2624
56f94936df1e code style reformatting using black
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
188 return metadata["path"]
2109
85f3e12e984d core (memory/cache): file caching handling, first draft:
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parents:
diff changeset
189
4037
524856bd7b19 massive refactoring to switch from camelCase to snake_case:
Goffi <goffi@goffi.org>
parents: 3818
diff changeset
190 def remove_from_cache(self, uid, metadata=None):
3210
fedec192a83f core (memory/cache): new removeFromCache method
Goffi <goffi@goffi.org>
parents: 3209
diff changeset
191 """Remove data from cache
fedec192a83f core (memory/cache): new removeFromCache method
Goffi <goffi@goffi.org>
parents: 3209
diff changeset
192
fedec192a83f core (memory/cache): new removeFromCache method
Goffi <goffi@goffi.org>
parents: 3209
diff changeset
193 @param uid(unicode): unique identifier cache file
fedec192a83f core (memory/cache): new removeFromCache method
Goffi <goffi@goffi.org>
parents: 3209
diff changeset
194 """
4037
524856bd7b19 massive refactoring to switch from camelCase to snake_case:
Goffi <goffi@goffi.org>
parents: 3818
diff changeset
195 cache_data = self.get_metadata(uid, update_eol=False)
3210
fedec192a83f core (memory/cache): new removeFromCache method
Goffi <goffi@goffi.org>
parents: 3209
diff changeset
196 if cache_data is None:
fedec192a83f core (memory/cache): new removeFromCache method
Goffi <goffi@goffi.org>
parents: 3209
diff changeset
197 log.debug(f"cache with uid {uid!r} has already expired or been removed")
fedec192a83f core (memory/cache): new removeFromCache method
Goffi <goffi@goffi.org>
parents: 3209
diff changeset
198 return
fedec192a83f core (memory/cache): new removeFromCache method
Goffi <goffi@goffi.org>
parents: 3209
diff changeset
199
fedec192a83f core (memory/cache): new removeFromCache method
Goffi <goffi@goffi.org>
parents: 3209
diff changeset
200 try:
fedec192a83f core (memory/cache): new removeFromCache method
Goffi <goffi@goffi.org>
parents: 3209
diff changeset
201 filename = cache_data['filename']
fedec192a83f core (memory/cache): new removeFromCache method
Goffi <goffi@goffi.org>
parents: 3209
diff changeset
202 except KeyError:
fedec192a83f core (memory/cache): new removeFromCache method
Goffi <goffi@goffi.org>
parents: 3209
diff changeset
203 log.warning(_("missing filename for cache {uid!r}") .format(uid=uid))
fedec192a83f core (memory/cache): new removeFromCache method
Goffi <goffi@goffi.org>
parents: 3209
diff changeset
204 else:
fedec192a83f core (memory/cache): new removeFromCache method
Goffi <goffi@goffi.org>
parents: 3209
diff changeset
205 filepath = self.getPath(filename)
fedec192a83f core (memory/cache): new removeFromCache method
Goffi <goffi@goffi.org>
parents: 3209
diff changeset
206 try:
fedec192a83f core (memory/cache): new removeFromCache method
Goffi <goffi@goffi.org>
parents: 3209
diff changeset
207 filepath.unlink()
fedec192a83f core (memory/cache): new removeFromCache method
Goffi <goffi@goffi.org>
parents: 3209
diff changeset
208 except FileNotFoundError:
fedec192a83f core (memory/cache): new removeFromCache method
Goffi <goffi@goffi.org>
parents: 3209
diff changeset
209 log.warning(
fedec192a83f core (memory/cache): new removeFromCache method
Goffi <goffi@goffi.org>
parents: 3209
diff changeset
210 _("missing file referenced in cache {uid!r}: {filename}")
fedec192a83f core (memory/cache): new removeFromCache method
Goffi <goffi@goffi.org>
parents: 3209
diff changeset
211 .format(uid=uid, filename=filename)
fedec192a83f core (memory/cache): new removeFromCache method
Goffi <goffi@goffi.org>
parents: 3209
diff changeset
212 )
fedec192a83f core (memory/cache): new removeFromCache method
Goffi <goffi@goffi.org>
parents: 3209
diff changeset
213
fedec192a83f core (memory/cache): new removeFromCache method
Goffi <goffi@goffi.org>
parents: 3209
diff changeset
214 cache_file = self.getPath(uid)
fedec192a83f core (memory/cache): new removeFromCache method
Goffi <goffi@goffi.org>
parents: 3209
diff changeset
215 cache_file.unlink()
fedec192a83f core (memory/cache): new removeFromCache method
Goffi <goffi@goffi.org>
parents: 3209
diff changeset
216 log.debug(f"cache with uid {uid!r} has been removed")
fedec192a83f core (memory/cache): new removeFromCache method
Goffi <goffi@goffi.org>
parents: 3209
diff changeset
217
4037
524856bd7b19 massive refactoring to switch from camelCase to snake_case:
Goffi <goffi@goffi.org>
parents: 3818
diff changeset
218 def cache_data(
3818
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
219 self,
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
220 source: str,
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
221 uid: str,
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
222 mime_type: Optional[str] = None,
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
223 max_age: Optional[int] = None,
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
224 original_filename: Optional[str] = None
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
225 ) -> BufferedIOBase:
2109
85f3e12e984d core (memory/cache): file caching handling, first draft:
Goffi <goffi@goffi.org>
parents:
diff changeset
226 """create cache metadata and file object to use for actual data
85f3e12e984d core (memory/cache): file caching handling, first draft:
Goffi <goffi@goffi.org>
parents:
diff changeset
227
3818
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
228 @param source: source of the cache (should be plugin's import_name)
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
229 @param uid: an identifier of the file which must be unique
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
230 @param mime_type: MIME type of the file to cache
2109
85f3e12e984d core (memory/cache): file caching handling, first draft:
Goffi <goffi@goffi.org>
parents:
diff changeset
231 it will be used notably to guess file extension
3198
08151c103636 core (memory/cache): added some metadata:
Goffi <goffi@goffi.org>
parents: 3188
diff changeset
232 It may be autogenerated if filename is specified
3818
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
233 @param max_age: maximum age in seconds
2109
85f3e12e984d core (memory/cache): file caching handling, first draft:
Goffi <goffi@goffi.org>
parents:
diff changeset
234 the cache metadata will have an "eol" (end of life)
85f3e12e984d core (memory/cache): file caching handling, first draft:
Goffi <goffi@goffi.org>
parents:
diff changeset
235 None to use default value
85f3e12e984d core (memory/cache): file caching handling, first draft:
Goffi <goffi@goffi.org>
parents:
diff changeset
236 0 to ignore cache (file will be re-downloaded on each access)
3818
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
237 @param original_filename: if not None, will be used to retrieve file extension and
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
238 guess
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
239 mime type, and stored in "original_filename"
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
240 @return: file object opened in write mode
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
241 you have to close it yourself (hint: use ``with`` statement)
2109
85f3e12e984d core (memory/cache): file caching handling, first draft:
Goffi <goffi@goffi.org>
parents:
diff changeset
242 """
85f3e12e984d core (memory/cache): file caching handling, first draft:
Goffi <goffi@goffi.org>
parents:
diff changeset
243 if max_age is None:
85f3e12e984d core (memory/cache): file caching handling, first draft:
Goffi <goffi@goffi.org>
parents:
diff changeset
244 max_age = C.DEFAULT_MAX_AGE
2624
56f94936df1e code style reformatting using black
Goffi <goffi@goffi.org>
parents: 2562
diff changeset
245 cache_data = {
3028
ab2696e34d29 Python 3 port:
Goffi <goffi@goffi.org>
parents: 2771
diff changeset
246 "source": source,
3818
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
247 # we also store max_age for updating eol
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
248 "max_age": max_age,
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
249 }
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
250 cache_url = self.getPath(uid)
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
251 if original_filename is not None:
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
252 cache_data["original_filename"] = original_filename
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
253 if mime_type is None:
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
254 # we have original_filename but not MIME type, we try to guess the later
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
255 mime_type = mimetypes.guess_type(original_filename, strict=False)[0]
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
256 if mime_type:
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
257 ext = mimetypes.guess_extension(mime_type, strict=False)
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
258 if ext is None:
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
259 log.warning(
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
260 "can't find extension for MIME type {}".format(mime_type)
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
261 )
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
262 ext = DEFAULT_EXT
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
263 elif ext == ".jpe":
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
264 ext = ".jpg"
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
265 else:
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
266 ext = DEFAULT_EXT
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
267 mime_type = None
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
268 filename = uid + ext
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
269 now = int(time.time())
2863345c9bbb core (memory/cache): type hints + filename fix:
Goffi <goffi@goffi.org>
parents: 3572
diff changeset
270 cache_data.update({
3028
ab2696e34d29 Python 3 port:
Goffi <goffi@goffi.org>
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271 "filename": filename,
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Goffi <goffi@goffi.org>
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272 "creation": now,
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Goffi <goffi@goffi.org>
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273 "eol": now + max_age,
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ab2696e34d29 Python 3 port:
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274 "mime_type": mime_type,
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Goffi <goffi@goffi.org>
parents: 3572
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275 })
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85f3e12e984d core (memory/cache): file caching handling, first draft:
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parents:
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276 file_path = self.getPath(filename)
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277
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Goffi <goffi@goffi.org>
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278 with open(cache_url, "wb") as f:
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parents:
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279 pickle.dump(cache_data, f, protocol=2)
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parents:
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280
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Goffi <goffi@goffi.org>
parents: 3137
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281 return file_path.open("wb")