1 # GNU MediaGoblin -- federated, autonomous media hosting
2 # Copyright (C) 2011, 2012 MediaGoblin contributors. See AUTHORS.
4 # This program is free software: you can redistribute it and/or modify
5 # it under the terms of the GNU Affero General Public License as published by
6 # the Free Software Foundation, either version 3 of the License, or
7 # (at your option) any later version.
9 # This program is distributed in the hope that it will be useful,
10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 # GNU Affero General Public License for more details.
14 # You should have received a copy of the GNU Affero General Public License
15 # along with this program. If not, see <http://www.gnu.org/licenses/>.
21 from mediagoblin
import mg_globals
as mgg
22 from mediagoblin
.processing
import BadMediaFail
, \
23 create_pub_filepath
, FilenameBuilder
24 from mediagoblin
.tools
.exif
import exif_fix_image_orientation
, \
25 extract_exif
, clean_exif
, get_gps_data
, get_useful
, \
26 exif_image_needs_rotation
28 _log
= logging
.getLogger(__name__
)
31 def resize_image(entry
, filename
, new_path
, exif_tags
, workdir
, new_size
,
33 """Store a resized version of an image and return its pathname.
36 entry -- the entry for the image to resize
37 filename -- the filename of the original image being resized
38 new_path -- public file path for the new resized image
39 exif_tags -- EXIF data for the original image
40 workdir -- directory path for storing converted image files
41 new_size -- 2-tuple size for the resized image
44 resized
= Image
.open(filename
)
47 resized
= exif_fix_image_orientation(resized
, exif_tags
) # Fix orientation
48 resized
.thumbnail(new_size
, Image
.ANTIALIAS
)
50 # Copy the new file to the conversion subdir, then remotely.
51 tmp_resized_filename
= os
.path
.join(workdir
, new_path
[-1])
52 with
file(tmp_resized_filename
, 'w') as resized_file
:
53 resized
.save(resized_file
)
54 mgg
.public_store
.copy_local_to_storage(tmp_resized_filename
, new_path
)
57 SUPPORTED_FILETYPES
= ['png', 'gif', 'jpg', 'jpeg']
60 def sniff_handler(media_file
, **kw
):
61 if kw
.get('media') is not None: # That's a double negative!
62 name
, ext
= os
.path
.splitext(kw
['media'].filename
)
63 clean_ext
= ext
[1:].lower() # Strip the . from ext and make lowercase
65 _log
.debug('name: {0}\next: {1}\nlower_ext: {2}'.format(
70 if clean_ext
in SUPPORTED_FILETYPES
:
71 _log
.info('Found file extension in supported filetypes')
74 _log
.debug('Media present, extension not found in {0}'.format(
77 _log
.warning('Need additional information (keyword argument \'media\')'
78 ' to be able to handle sniffing')
83 def process_image(entry
):
85 Code to process an image
87 workbench
= mgg
.workbench_manager
.create_workbench()
88 # Conversions subdirectory to avoid collisions
89 conversions_subdir
= os
.path
.join(
90 workbench
.dir, 'conversions')
91 os
.mkdir(conversions_subdir
)
92 queued_filepath
= entry
.queued_media_file
93 queued_filename
= workbench
.localized_file(
94 mgg
.queue_store
, queued_filepath
,
96 name_builder
= FilenameBuilder(queued_filename
)
99 exif_tags
= extract_exif(queued_filename
)
100 gps_data
= get_gps_data(exif_tags
)
102 # Always create a small thumbnail
103 thumb_filepath
= create_pub_filepath(
104 entry
, name_builder
.fill('{basename}.thumbnail{ext}'))
105 resize_image(entry
, queued_filename
, thumb_filepath
,
106 exif_tags
, conversions_subdir
,
107 (mgg
.global_config
['media:thumb']['max_width'],
108 mgg
.global_config
['media:thumb']['max_height']))
110 # If the size of the original file exceeds the specified size of a `medium`
111 # file, a `.medium.jpg` files is created and later associated with the media
113 medium
= Image
.open(queued_filename
)
114 if medium
.size
[0] > mgg
.global_config
['media:medium']['max_width'] \
115 or medium
.size
[1] > mgg
.global_config
['media:medium']['max_height'] \
116 or exif_image_needs_rotation(exif_tags
):
117 medium_filepath
= create_pub_filepath(
118 entry
, name_builder
.fill('{basename}.medium{ext}'))
120 entry
, queued_filename
, medium_filepath
,
121 exif_tags
, conversions_subdir
,
122 (mgg
.global_config
['media:medium']['max_width'],
123 mgg
.global_config
['media:medium']['max_height']))
125 medium_filepath
= None
127 # we have to re-read because unlike PIL, not everything reads
128 # things in string representation :)
129 queued_file
= file(queued_filename
, 'rb')
132 original_filepath
= create_pub_filepath(
133 entry
, name_builder
.fill('{basename}{ext}'))
135 with mgg
.public_store
.get_file(original_filepath
, 'wb') \
137 original_file
.write(queued_file
.read())
139 # Remove queued media file from storage and database
140 mgg
.queue_store
.delete_file(queued_filepath
)
141 entry
.queued_media_file
= []
143 # Insert media file information into database
144 media_files_dict
= entry
.setdefault('media_files', {})
145 media_files_dict
['thumb'] = thumb_filepath
146 media_files_dict
['original'] = original_filepath
148 media_files_dict
['medium'] = medium_filepath
150 # Insert exif data into database
151 exif_all
= clean_exif(exif_tags
)
154 entry
.media_data_init(exif_all
=exif_all
)
157 for key
in list(gps_data
.keys()):
158 gps_data
['gps_' + key
] = gps_data
.pop(key
)
159 entry
.media_data_init(**gps_data
)
162 workbench
.destroy_self()
164 if __name__
== '__main__':
168 pp
= pprint
.PrettyPrinter()
170 result
= extract_exif(sys
.argv
[1])
171 gps
= get_gps_data(result
)
172 clean
= clean_exif(result
)
173 useful
= get_useful(clean
)