使用Ajax在Django中打开Reportlab生成的PDF文件

I'm using Reportlab with Django to generate pdf of data computed on the client side.

我正在使用Django的Reportlab生成客户端计算的数据的pdf。

Ajax is chosen because the client has non-trivial data to transfer for pdf generation.

之所以选择Ajax，是因为客户机有大量数据要传输给pdf生成。

$.ajax({
    type:'POST',
    url:document.URL + '/export',
    data: JSON.stringify(data),
    dataType:'json',
    contentType:'application/pdf',
    success:function(data){
        // Question 1. What should I insert here to download pdf?
    },
    error:function(e){
        ...
    }
});

And here is the view.py

这是view。py

def export(request, *args, **kwargs):

    // Perform Ajax check
    ...

    response = HttpResponse(content_type='application/pdf')
    response['Content-Disposition'] = 'attachment; filename="essay.pdf"'

    p = canvas.Canvas(response, bottomup=0)
    data = json.loads(request.body)

    p.drawString(100, 100, "Hello world.")
    p.showPage()
    p.save()
    return response

Question 2. I could not get ajax to succeed with its request, only invoking error callback. The same issue was referred in this question

问题2。我无法让ajax成功地完成它的请求，只调用错误回调。在这个问题中也提到了同样的问题

ReportLab in Django

在Django ReportLab

but it wasn't answered. Am I missing something?

但它不是回答。我遗漏了什么东西?

2 个解决方案

#1

my solution would be to use a standard form instead of ajax.

我的解决方案是使用标准表单而不是ajax。

You can put a form in your html (or build it using JS)

可以在html中放置表单(或者使用JS构建表单)

<form id="my_form" action="export" method="post">
    <input id="my_form_data" type="hidden" name="data" />
</form>

Then, when you want your data sent, using JS:

然后，当您希望发送数据时，使用JS:

$('#my_form_data').value(JSON.stringify(data));
$('#my_form').submit();

#2

You can't download a file via ajax. But you can use this library: jquery.fileDownload.

不能通过ajax下载文件。但是您可以使用这个库:jquery.fileDownload。

jQuery File Download is a cross server platform compatible jQuery plugin that allows for an Ajax-like file download experience that isn’t normally possible using the web.

jQuery文件下载是一个跨服务器平台兼容的jQuery插件，它允许类似ajax的文件下载体验，而通常使用web是不可能的。

#1