models.py 文件源码

def download(self):
        """
        Download the LaTeX source of this paper and save to storage. It will
        save the model.
        """
        # Delete an existing file if it exists so we don't clutter up storage
        # with dupes. This might mean we lose a file the download fails,
        # but we can just download it again.
        if self.source_file.name:
            self.source_file.delete()

        res = requests.get(self.get_source_url())
        res.raise_for_status()
        extension = guess_extension_from_headers(res.headers)
        if not extension:
            raise DownloadError("Could not determine file extension from "
                                "headers: Content-Type: {}; "
                                "Content-Encoding: {}".format(
                                    res.headers.get('content-type'),
                                    res.headers.get('content-encoding')))
        content = ContentFile(res.content)
        self.source_file.save(self.arxiv_id + extension, content)