Python 修改pdf并将其作为django响应返回

我需要修改现有的pdf并将其作为Django中的响应返回。到目前为止，我已找到此解决方案来修改文件：

def some_view(request):
    # Create the HttpResponse object with the appropriate PDF headers.
    response = HttpResponse(content_type='application/pdf')
    response['Content-Disposition'] = 'attachment;filename="somefilename.pdf"'

    packet = StringIO.StringIO()
    # create a new PDF with Reportlab
    can = canvas.Canvas(packet, pagesize=letter)

    ##################### 1. First and last name
    first_last_name = "Barney Stinson"
    can.drawString(63, 686, first_last_name)
    #Saving
    can.save()

    #move to the beginning of the StringIO buffer
    packet.seek(0)
    new_pdf = PdfFileReader(packet)

    # read your existing PDF
    existing_pdf = PdfFileReader(file("fw9.pdf", "rb"))
    output = PdfFileWriter()

    # add the "watermark" (which is the new pdf) on the existing page
    page = existing_pdf.getPage(0)
    page.mergePage(new_pdf.getPage(0))
    output.addPage(page)

    # finally, write "output" to a real file
    #outputStream = file("output.pdf", "wb")
    #output.write(outputStream)
    response.write(output)
    outputStream.close()

    return response

它让我下载pdf，但当我试图打开它，我得到的信息，该文件已损坏或未正确解码

有人知道我错了吗

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谢谢大家!

您可以将输出PDF写入响应对象。因此，与此相反：

response.write(output)

这样做：

output.write(response)

这将把PDF的内容写入响应，而不是输出对象的字符串版本，如下所示：

<PyPDF2.pdf.PdfFileWriter object at 0x7f0e801ea090>

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这就是您将在下载的PDF文件中找到的内容。

有两个难题-修改PDF并将其写入响应。修改零件工作例如，您是否尝试过将修改后的pdf保存为文件？