将 pdf 从 django-wkhtmltopdf 保存到服务器(而不是作为响应返回) [英] Save pdf from django-wkhtmltopdf to server (instead of returning as a response)

问题描述

我正在编写一个 Django 函数，它接受一些用户输入，并为用户生成一个 pdf.然而，生成pdf的过程相当密集，我会收到很多重复的请求，所以我想将生成的pdf存储在服务器上，并在生成之前检查它们是否已经存在.

I'm writing a Django function that takes some user input, and generates a pdf for the user. However, the process for generating the pdf is quite intensive, and I'll get a lot of repeated requests so I'd like to store the generated pdfs on the server and check if they already exist before generating them.

问题是 django-wkhtmltopdf(我用于生成)旨在直接返回给用户，我不确定如何将其存储在文件中.

The problem is that django-wkhtmltopdf (which I'm using for generation) is meant to return to the user directly, and I'm not sure how to store it on the file.

我有以下内容，可用于在/pdf 处返回 pdf:

I have the following, which works for returning a pdf at /pdf:

urls.py

urlpatterns = [
    url(r'^pdf$', views.createPDF.as_view(template_name='site/pdftemplate.html', filename='my_pdf.pdf'))
]

views.py

class createPDF(PDFTemplateView):
    filename = 'my_pdf.pdf'
    template_name = 'site/pdftemplate.html'

因此可以很好地创建 pdf.我想要的是从另一个视图调用该视图并保存结果.这是我到目前为止所得到的:

So that works fine to create a pdf. What I'd like is to call that view from another view and save the result. Here's what I've got so far:

#Create pdf
pdf = createPDF.as_view(template_name='site/pdftemplate.html', filename='my_pdf.pdf')
pdf = pdf(request).render()

pdfPath = os.path.join(settings.TEMP_DIR,'temp.pdf')
with open(pdfPath, 'w') as f:
    f.write(pdf.content)

这将创建 temp.pdf 并且大约是我期望的大小，但文件无效(它呈现为一个完全空白的页面).

This creates temp.pdf and is about the size I'd expect but the file isn't valid (it renders as a single completely blank page).

有什么建议吗?

推荐答案

详细说明先前给出的答案:要生成 pdf 文件并保存到磁盘，请在您视图中的任何位置执行此操作:

Elaborating on the previous answer given: to generate a pdf file and save to disk do this anywhere in your view:

            ...
            context = {...}  # build your context

            # generate response
            response = PDFTemplateResponse(
                            request=self.request,
                            template=self.template_name,
                            filename='file.pdf',
                            context=context,
                            cmd_options={'load-error-handling': 'ignore'})

            # write the rendered content to a file
            with open("file.pdf", "wb") as f:
                f.write(response.rendered_content)
            ...

我在 TemplateView 类中使用了此代码，因此 request 和 template 字段设置为这样，您可能必须将其设置为适合您特定情况的任何内容.

I have used this code in a TemplateView class so request and template fields were set like that, you may have to set it to whatever is appropriate in your particular case.

这篇关于将 pdf 从 django-wkhtmltopdf 保存到服务器(而不是作为响应返回)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！