def generate_thumbnail(doc_file_id):
"""
Celery task that tries to generate a thumbnail for a :class:`.DocumentFile`.
If it succeed, this function modifies the :attr:`.DocumentFile.thumbnail`
attribute. The stored value follow the following pattern
:samp:`{doc_file_id}.png`.
:param doc_file_id: id of the :class:`.DocumentFile`.
"""
doc_file = DocumentFile.objects.get(id=doc_file_id)
ext = os.path.splitext(doc_file.filename)[1].lower()
ext2 = get_ext(doc_file.filename)
name = "%s.png" % (doc_file_id)
thumbnail_path = thumbnailfs.path(name)
generated = resize = False
thumbnailers = ThumbnailersManager.get_all_thumbnailers(ext)[:]
if ext2 != ext:
thumbnailers.extend(ThumbnailersManager.get_all_thumbnailers(ext2))
for thumbnailer in thumbnailers:
try:
resize = thumbnailer(doc_file.file.path, doc_file.filename,
thumbnail_path)
except Exception, e:
# let another thumbnailer do the job
if os.path.exists(thumbnail_path):
# this file may be corrupted
os.remove(thumbnail_path)
else:
if os.path.exists(thumbnail_path):
doc_file.thumbnail = os.path.basename(thumbnail_path)
doc_file.no_index = True
doc_file.save(update_fields=("thumbnail", ))
generated = True
break
def generate_thumbnail(doc_file_id):
"""
Celery task that tries to generate a thumbnail for a :class:`.DocumentFile`.
If it succeed, this function modifies the :attr:`.DocumentFile.thumbnail`
attribute. The stored value follow the following pattern
:samp:`{doc_file_id}.png`.
:param doc_file_id: id of the :class:`.DocumentFile`.
"""
doc_file = DocumentFile.objects.get(id=doc_file_id)
ext = os.path.splitext(doc_file.filename)[1].lower()
ext2 = get_ext(doc_file.filename)
name = "%s.png" % (doc_file_id)
thumbnail_path = thumbnailfs.path(name)
generated = resize = False
thumbnailers = ThumbnailersManager.get_all_thumbnailers(ext)[:]
if ext2 != ext:
thumbnailers.extend(ThumbnailersManager.get_all_thumbnailers(ext2))
for thumbnailer in thumbnailers:
try:
resize = thumbnailer(doc_file.file.path, doc_file.filename, thumbnail_path)
except Exception, e:
# let another thumbnailer do the job
if os.path.exists(thumbnail_path):
# this file may be corrupted
os.remove(thumbnail_path)
else:
if os.path.exists(thumbnail_path):
doc_file.thumbnail = os.path.basename(thumbnail_path)
doc_file.no_index = True
doc_file.save(update_fields=("thumbnail",))
generated = True
break
