148 lines
4.7 KiB
Python
148 lines
4.7 KiB
Python
import errno
|
|
import os
|
|
import hashlib
|
|
|
|
from django.core.files.base import File
|
|
from django.core.exceptions import ObjectDoesNotExist
|
|
from django.utils.translation import ugettext
|
|
from django.contrib import messages
|
|
from django.utils.translation import ugettext_lazy as _
|
|
|
|
from converter.api import convert, cache_cleanup
|
|
|
|
DEFAULT_STAGING_DIRECTORY = u'/tmp'
|
|
#from documents.conf.settings import DEFAULT_TRANSFORMATIONS
|
|
|
|
HASH_FUNCTION = lambda x: hashlib.sha256(x).hexdigest()
|
|
#TODO: Do benchmarks
|
|
#func = lambda:[StagingFile.get_all() is None for i in range(100)]
|
|
#t1=time.time();func();t2=time.time();print '%s took %0.3f ms' % (func.func_name, (t2-t1)*1000.0)
|
|
|
|
#STAGING_FILE_FUNCTIONS = {
|
|
# UPLOAD_SOURCE_STAGING: lambda x: STAGING_DIRECTORY,
|
|
# UPLOAD_SOURCE_USER_STAGING: lambda x: os.path.join(USER_STAGING_DIRECTORY_ROOT, eval(USER_STAGING_DIRECTORY_EXPRESSION, {'user': x.user}))
|
|
#}
|
|
|
|
|
|
#def evaluate_user_staging_path(request, source):
|
|
# try:
|
|
# return STAGING_FILE_FUNCTIONS[source](request)
|
|
# except Exception, exc:
|
|
# messages.error(request, _(u'Error evaluating user staging directory expression; %s') % exc)
|
|
# return u''
|
|
|
|
|
|
def get_all_files(path):
|
|
try:
|
|
return sorted([os.path.normcase(f) for f in os.listdir(path) if os.path.isfile(os.path.join(path, f))])
|
|
except OSError, exc:
|
|
raise OSError(ugettext(u'Unable get list of staging files: %s') % exc)
|
|
|
|
|
|
def _return_new_class():
|
|
return type('StagingFile', (StagingFile,), dict(StagingFile.__dict__))
|
|
|
|
|
|
def create_staging_file_class(request, source):
|
|
cls = _return_new_class()
|
|
#cls.set_path(evaluate_user_staging_path(request, source))
|
|
cls.set_path(source)
|
|
return cls
|
|
|
|
|
|
class StagingFile(object):
|
|
"""
|
|
Simple class to encapsulate the files in a directory and hide the
|
|
specifics to the view
|
|
"""
|
|
path = DEFAULT_STAGING_DIRECTORY
|
|
|
|
@classmethod
|
|
def set_path(cls, path):
|
|
cls.path = path
|
|
|
|
@classmethod
|
|
def get_all(cls):
|
|
"""
|
|
Return a list of StagingFile instances corresponding to the
|
|
current path
|
|
"""
|
|
staging_files = []
|
|
for filename in get_all_files(cls.path):
|
|
staging_files.append(StagingFile(
|
|
filepath=os.path.join(cls.path, filename)))
|
|
|
|
return staging_files
|
|
|
|
@classmethod
|
|
def get(cls, id):
|
|
"""
|
|
Return a single StagingFile instance corresponding to the id
|
|
given as argument
|
|
"""
|
|
files_dict = dict([(file.id, file) for file in cls.get_all()])
|
|
if id in files_dict:
|
|
return files_dict[id]
|
|
else:
|
|
raise ObjectDoesNotExist
|
|
|
|
def __init__(self, filepath):
|
|
self.filepath = filepath
|
|
self.filename = os.path.basename(filepath)
|
|
self._id = HASH_FUNCTION(open(filepath).read())
|
|
|
|
def __unicode__(self):
|
|
return self.filename
|
|
|
|
def __repr__(self):
|
|
return self.__unicode__()
|
|
|
|
def __getattr__(self, name):
|
|
if name == 'id':
|
|
return self._id
|
|
else:
|
|
raise AttributeError
|
|
|
|
def upload(self):
|
|
"""
|
|
Return a StagingFile encapsulated in a File class instance to
|
|
allow for easier upload a staging files
|
|
"""
|
|
try:
|
|
return File(file(self.filepath, 'rb'), name=self.filename)
|
|
except Exception, exc:
|
|
raise Exception(ugettext(u'Unable to upload staging file: %s') % exc)
|
|
|
|
def delete(self, preview_size):
|
|
# tranformation_string, errors = get_transformation_string(DEFAULT_TRANSFORMATIONS)
|
|
cache_cleanup(self.filepath, size=preview_size)# , extra_options=tranformation_string)
|
|
try:
|
|
os.unlink(self.filepath)
|
|
except OSError, exc:
|
|
if exc.errno == errno.ENOENT:
|
|
pass
|
|
else:
|
|
raise OSError(ugettext(u'Unable to delete staging file: %s') % exc)
|
|
|
|
def preview(self, preview_size):
|
|
errors = []
|
|
# tranformation_string, errors = get_transformation_string(DEFAULT_TRANSFORMATIONS)
|
|
# output_file = convert(self.filepath, size=STAGING_FILES_PREVIEW_SIZE, extra_options=tranformation_string, cleanup_files=False)
|
|
output_file = convert(self.filepath, size=preview_size, cleanup_files=False)
|
|
return output_file, errors
|
|
|
|
|
|
def get_transformation_string(transformations):
|
|
transformation_list = []
|
|
errors = []
|
|
#for transformation in transformations:
|
|
# try:
|
|
# if transformation['name'] in TRANFORMATION_CHOICES:
|
|
# output = TRANFORMATION_CHOICES[transformation['name']] % eval(transformation['arguments'])
|
|
# transformation_list.append(output)
|
|
# except Exception, e:
|
|
# errors.append(e)
|
|
|
|
#tranformation_string = ' '.join(transformation_list)
|
|
return tranformation_string, errors
|