Question

I have a django app that dynamically generates a PDF (using reportlab + pypdf) from user input on an HTML form, and returns the HTTP response with an application/pdf MIMEType.

I want to have the option between doing the above, or emailing the generated pdf, but I cannot figure out how to use the EmailMessage class s attach(filename=None, content=None, mimetype=None) method. The documentation doesn t give much of a description of what kind of object content is supposed to be. I ve tried a file object and the above application/pdf HTTP response.

I currently have a workaround where my view saves a pdf to disk, and then I attach the resulting file to an outgoing email using the attach_file() method. This seems wrong to me, and I m pretty sure there is a better way.

Answer 1

Ok I ve figured it out.

The second argument in attach() expects a string. I just used a file object s read() method to generate what it was looking for:

from django.core.mail import EmailMessage

message = EmailMessage( Hello ,  Body goes here ,  from@example.com ,
    [ to1@example.com ,  to2@example.com ], [ bcc@example.com ],
    headers = { Reply-To :  another@example.com })
attachment = open( myfile.pdf ,  rb )
message.attach( myfile.pdf ,attachment.read(), application/pdf )

I ended up using a tempfile instead, but the concept is the same as an ordinary file object.

Answer 2

Generate the file temp.

from django.utils import timezone    
from io import BytesIO
from reportlab.pdfgen import canvas
from reportlab.lib.pagesizes import letter

def generate_pdf(pk):
    y = 700
    buffer = BytesIO()
    p = canvas.Canvas(buffer, pagesize=letter)
    p.setFont( Helvetica , 10)
    p.drawString(220, y, "PDF generate at "+timezone.now().strftime( %Y-%b-%d ))
    p.showPage()
    p.save()
    pdf = buffer.getvalue()
    buffer.close()
    return pdf

Attach the PDF to message

from django.core.mail import EmailMessage
def send(request)
    pdf = generate_pdf(pk)
    msg = EmailMessage("title", "content", to=["email@gmail.com"])
    msg.attach( my_pdf.pdf , pdf,  application/pdf )
    msg.content_subtype = "html"
    msg.send()

Answer 3

Based on the example in your link:

message.attach( design.png , img_data,  image/png )

Wouldn t your content for a pdf just be the same output that you would normally write to the pdf file? Instead of saving the generated_pdf_data to myfile.pdf, plug it into the content field of the message.attach:

message.attach( myfile.pdf , generated_pdf_data,  application/pdf )

Answer 4

I found this to work

message.attach( myfile.pdf , pdf.getvalue() ,  application/pdf )

When using

message.attach( myfile.pdf , pdf.read() ,  application/pdf )

The pdf cannot be opened as it s corrupt

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