def fetch_file(path, type, friendly):
# TODO: Need protection against hack such as ../
buffer = ds.open(path)
if buffer:
file = buffer.read()
# TODO: Maybe transform the httpresponse to streaminghttpresponse in case the graph is really large and to improve efficiency
response = HttpResponse(file, content_type=type)
# Get filename.
if friendly:
path = path.rpartition('/')[0] + '/' + ps.get_file_by_name(path).friendly_name
# Construct and send response
response['Content-Disposition'] = 'attachment; filename="' + path + '"'
return response
else:
return HttpResponseNotFound('<h1>404 : ' + path + ' not found</h1>')
def open(self, mode=None):
if mode is not None:
self.mode = mode
self.file_handle = ds.open(self.path, self.mode)
return self.file_handle
def file_preview(request, file = None):
app_access = __check_app_access()
if app_access is not None:
return app_access
## Authentication.
authed_user = auth.get_current_user()
if authed_user is None:
authed_user_nick = 'Guest'
else:
authed_user_nick = authed_user.nickname()
## Graph visualisation.
# Replaced by a spinning canvas on the clientside
# if not ds.check_exists(GRAPH_BUCKET + '/' + file_name_without_extension + '.png', None):
# file_name_without_extension = None
#TODO: Might need to be simplified or moved to a function in fileinfo
# TODO the folowing should be replaced by a method in the APIDatastore
file_info = ps.get_file_by_name(DATA_BUCKET + '/' + file)
undo_uri = None
if file_info is not None:
prev_file = ps.get_file_by_key(file_info.prev_file_key)
if prev_file is not None:
undo_uri = prev_file.file_name.rpartition(DATA_BUCKET + '/')[2]
lst = ds.list(DATA_BUCKET)
current_file = None
for temp_file in lst:
temp_file.filename = temp_file.filename.rpartition('/')[2]
if temp_file.filename == file:
current_file = temp_file;
# Check whether graph exists yet.
graph_exists = ds.check_exists(GRAPH_BUCKET + '/' + file.partition('.')[0] + '.png', None)
# Get permissions for file.
permissions = None
if file_info is not None:
user_key = ps.get_user_key_by_id(authed_user.user_id())
permissions = ps.get_user_file_permissions(file_info.key, user_key)
template_dict = {'current_file' : current_file,
'name' : file,
'authed_user_nick': authed_user_nick,
'file_info' : file_info,
'graph_ready' : graph_exists,
'undo_link' : undo_uri,
'permissions' : permissions }
## Get gating information.
info_path = INFO_BUCKET + '/' + file.partition('.')[0] + '.txt'
if ds.check_exists(info_path, None):
buffer = ds.open(info_path)
if buffer:
file_text = buffer.read()
stats = file_text.split(' ')
if len(stats)>=3:
template_dict.update( { 'gating_stats' : { 'selection' : stats[0],
'total' : stats[1],
'percent' : float(stats[2])*100 } } )
## Get different axis
axis_path = INFO_BUCKET + '/' + file.partition('.')[0] + 'info.txt'
if ds.check_exists(axis_path, None):
buffer = ds.open(axis_path)
if buffer:
file_text = buffer.read()
axis = file_text.split('\n')
if len(axis)>0:
while '' in axis:
axis.remove('')
template_dict.update( { 'available_axes' : axis } )
return render(request, 'file_preview.html', template_dict)
def test_addfile_checkCont(self):
ds.add_file("/test_bucket/test_dir/test_file_3.ext", "testing-testing-testing", None)
fh = ds.open("/test_bucket/test_dir/test_file_3.ext", 'r')
self.assertEqual(fh.read(), "testing-testing-testing")
