修改pdf并将其作为django响应返回

import os
from django.http import FileResponse
from django.core.files.storage import default_storage
from PyPDF2 import PdfFileReader, PdfFileWriter

def modify_pdf(request):
    # 检查请求中是否包含PDF文件
    if 'pdf_file' not in request.FILES:
        return HttpResponseBadRequest("No PDF file found in the request.")

    # 将接收到的PDF文件保存到服务器的临时目录中
    pdf_file = request.FILES['pdf_file']
    file_path = os.path.join('/tmp', pdf_file.name)
    with default_storage.open(file_path, 'wb+') as destination:
        for chunk in pdf_file.chunks():
            destination.write(chunk)

    # 打开保存的PDF文件并进行修改操作
    pdf = PdfFileReader(file_path)
    output_pdf = PdfFileWriter()

    # 示例：在第一页添加文本
    first_page = pdf.getPage(0)
    first_page.mergePage(output_pdf.getPage(0))
    output_pdf.addPage(first_page)

    # 保存修改后的PDF文件到服务器的临时目录中
    modified_file_path = os.path.join('/tmp', 'modified.pdf')
    with open(modified_file_path, 'wb') as output:
        output_pdf.write(output)

    # 将修改后的PDF文件作为响应返回给客户端
    response = FileResponse(open(modified_file_path, 'rb'), content_type='application/pdf')
    response['Content-Disposition'] = 'attachment; filename="modified.pdf"'
    return response