import tempfile
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import errno
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from django.core.files.uploadedfile import UploadedFile
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from django.core.files.uploadhandler import FileUploadHandler
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from django.conf import settings
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"""
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Same as Django's TemporaryFileUploadHandler, but closes the file
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after the upload is completed as not to hog the number of open fd limits
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(see https://github.com/OpenDroneMap/WebODM/issues/233)
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"""
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class TemporaryFileUploadHandler(FileUploadHandler):
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"""
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Upload handler that streams data into a temporary file.
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"""
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def __init__(self, *args, **kwargs):
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super(TemporaryFileUploadHandler, self).__init__(*args, **kwargs)
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def new_file(self, *args, **kwargs):
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"""
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Create the file object to append to as data is coming in.
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"""
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super(TemporaryFileUploadHandler, self).new_file(*args, **kwargs)
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self.file = ClosedTemporaryUploadedFile(self.file_name, self.content_type, 0, self.charset, self.content_type_extra)
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def receive_data_chunk(self, raw_data, start):
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self.file.write(raw_data)
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def file_complete(self, file_size):
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self.file.seek(0)
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self.file.size = file_size
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self.file.close() # Close the file as not to hog the number of open files descriptors
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return self.file
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class ClosedTemporaryUploadedFile(UploadedFile):
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"""
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A file uploaded to a temporary location (i.e. stream-to-disk).
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"""
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def __init__(self, name, content_type, size, charset, content_type_extra=None):
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file = tempfile.NamedTemporaryFile(suffix='.upload', dir=settings.FILE_UPLOAD_TEMP_DIR, delete=False)
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super(ClosedTemporaryUploadedFile, self).__init__(file, name, content_type, size, charset, content_type_extra)
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def temporary_file_path(self):
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"""
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Returns the full path of this file.
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"""
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return self.file.name
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def close(self):
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try:
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return self.file.close()
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except OSError as e:
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if e.errno != errno.ENOENT:
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# Means the file was moved or deleted before the tempfile
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# could unlink it. Still sets self.file.close_called and
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# calls self.file.file.close() before the exception
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raise
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