Question

我使用Django 2.1.4，并使用Django示例创建pdf报告

def some_view(request):
    # Create a file-like buffer to receive PDF data.
    buffer = io.BytesIO()

    # Create the PDF object, using the buffer as its "file."
    p = canvas.Canvas(buffer)

    # Draw things on the PDF. Here's where the PDF generation happens.
    # See the ReportLab documentation for the full list of functionality.
    p.drawString(100, 100, "Hello world.")

    # Close the PDF object cleanly, and we're done.
    p.showPage()
    p.save()

    # FileResponse sets the Content-Disposition header so that browsers
    # present the option to save the file.
    return FileResponse(buffer, as_attachment=True, filename='hello.pdf')

开始下载，但从未结束。怎么了？旧版本可以正常工作

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"'

    # Create the PDF object, using the response object as its "file."
    p = canvas.Canvas(response)

    # Draw things on the PDF. Here's where the PDF generation happens.
    # See the ReportLab documentation for the full list of functionality.
    p.drawString(100, 100, "Hello world.")

    # Close the PDF object cleanly, and we're done.
    p.showPage()
    p.save()
    return response

Answer 1

我将看一下这个示例（查询集除外），看看是否可行，类似How can i display my data in database and export it to pdf -Django

获取BytesIO缓冲区的值并将其写入响应。

response = HttpResponse(content_type='application/pdf')
response['Content-Disposition'] = 'attachment; filename="WishList.pdf"'
from reportlab.pdfgen import canvas 
buffer = BytesIO()
p = canvas.Canvas(buffer)
p.drawString(100, 100, "Hello world.")
p.showPage()
p.save()
pdf = buffer.getvalue()
buffer.close()
response.write(pdf)
return response

Answer 2

信不信由你，我建议您使用旧版本。要使其与FileResponse一起使用，请尝试以下操作：

# FileResponse sets the Content-Disposition header so that browsers
# present the option to save the file.
response = FileResponse(buffer, as_attachment=True, filename='hello.pdf', content_type='application/pdf')
# set the content length to let the browser know how many bytes to expect
response['Content-Length'] = bugger.getbuffer().nbytes
return response

pdf文件未保存在Django中

2 个答案: