def historian_importer(request, resource, dataset, template):
context = {}
if request.POST:
result = resource.import_data(dataset,
dry_run=True,
raise_errors=False,
file_name=tmp_storage.name,
user=request.user)
context['result'] = result
if not result.has_errors():
tmp_storage = TempFolderStorage()
input_format = JSON
tmp_storage.save(
dataset.export('json').encode(), input_format.get_read_mode)
context['confirm_form'] = ConfirmImportForm(
initial={
'import_file_name': tmp_storage.name,
'original_file_name': tmp_storage.name,
'input_format': input_format
})
context['fields'] = [
f.column_name for f in resource.get_user_visible_fields()
]
return TemplateResponse(request, [template], context)
def write_to_tmp_storage(self, import_file, input_format):
tmp_storage = TempFolderStorage()
data = bytes()
for chunk in import_file.chunks():
data += chunk
tmp_storage.save(data, input_format.get_read_mode())
return tmp_storage
def test_temp_folder_storage(self):
tmp_storage = TempFolderStorage()
tmp_storage.save(self.test_string)
name = tmp_storage.name
tmp_storage = TempFolderStorage(name=name)
self.assertEqual(self.test_string.decode('utf-8'), tmp_storage.read())
self.assertTrue(os.path.isfile(tmp_storage.get_full_path()))
tmp_storage.remove()
self.assertFalse(os.path.isfile(tmp_storage.get_full_path()))
def test_temp_folder_storage(self):
tmp_storage = TempFolderStorage()
tmp_storage.save(self.test_string)
name = tmp_storage.name
tmp_storage = TempFolderStorage(name=name)
self.assertEqual(self.test_string.decode(), tmp_storage.read())
self.assertTrue(os.path.isfile(tmp_storage.get_full_path()))
tmp_storage.remove()
self.assertFalse(os.path.isfile(tmp_storage.get_full_path()))
def importer(request, resource, template):
'''
Perform a dry_run of the import to make sure the import will not
result in errors. If there where no error, save the user
uploaded file to a local temp file that will be used by
'process_import' for the actual import.
'''
from_encoding = "utf-8"
context = {}
import_formats = [f for f in DEFAULT_FORMATS if f().can_import()]
form = ImportForm(import_formats, request.POST or None, request.FILES
or None)
if request.POST and form.is_valid():
input_format = import_formats[int(form.cleaned_data['input_format'])]()
import_file = form.cleaned_data['import_file']
tmp_storage = TempFolderStorage()
try:
#save
data = bytes()
for chunk in import_file.chunks():
data += chunk
tmp_storage.save(data, input_format.get_read_mode())
#read
data = tmp_storage.read(input_format.get_read_mode())
#decoding
if not input_format.is_binary() and from_encoding:
data = force_text(data, from_encoding)
#dataset
dataset = input_format.create_dataset(data)
except UnicodeDecodeError as e:
return HttpResponse(
_(u"<h1>Imported file has a wrong encoding: %s</h1>" % e))
except Exception as e:
return HttpResponse(
_(u"<h1>%s encountered while trying to load or the read file: %s</h1>"
% (type(e).__name__, import_file.name)))
print(dataset)
result = resource.import_data(dataset,
dry_run=True,
raise_errors=False,
file_name=import_file.name,
user=request.user)
context['result'] = result
if not result.has_errors():
context['confirm_form'] = ConfirmImportForm(
initial={
'import_file_name': tmp_storage.name,
'original_file_name': import_file.name,
'input_format': form.cleaned_data['input_format']
})
context['form'] = form
context['fields'] = [
f.column_name for f in resource.get_user_visible_fields()
]
return TemplateResponse(request, [template], context)