Question

我正在尝试使用Weasyprint python包从HTML模板生成pdf文件，我需要通过电子邮件发送它。

这是我尝试过的：

def send_pdf(request):
minutes = int(request.user.tagging.count()) * 5
testhours = minutes / 60
hours = str(round(testhours, 3))
user_info = {
    "name": str(request.user.first_name + ' ' + request.user.last_name),
    "hours": str(hours),
    "taggedArticles": str(request.user.tagging.count())
}
html = render_to_string('users/certificate_template.html',
                        {'user': user_info})
response = HttpResponse(content_type='application/pdf')
response['Content-Disposition'] = 'filename=certificate_{}'.format(user_info['name'] + '.pdf')
pdf = weasyprint.HTML(string=html).write_pdf(response, )
from_email = 'our_business_email_address'
to_emails = ['Reciever1', 'Reciever2']
subject = "Certificate from INC."
message = 'Enjoy your certificate.'
email = EmailMessage(subject, message, from_email, to_emails)
email.attach("certificate.pdf", pdf, "application/pdf")
email.send()
return HttpResponse(response, content_type='application/pdf')

但它返回错误TypeError: expected bytes-like object, not HttpResponse

如何从HTML模板生成PDF文件并将其发送到电子邮件？

更新：现在使用此更新代码生成pdf并发送电子邮件，但当我从收到的电子邮件中打开附加的pdf文件时，它会显示unsupported file formate data。

这是更新的代码：

def send_pdf(request):
minutes = int(request.user.tagging.count()) * 5
testhours = minutes / 60
hours = str(round(testhours, 3))
user_info = {
    "name": str(request.user.first_name + ' ' + request.user.last_name),
    "hours": str(hours),
    "taggedArticles": str(request.user.tagging.count())
}
html = render_to_string('users/certificate_template.html',
                        {'user': user_info})
response = HttpResponse(content_type='application/pdf')
response['Content-Disposition'] = 'filename=certificate_{}'.format(user_info['name']) + '.pdf'
pdf = weasyprint.HTML(string=html).write_pdf()
from_email = 'arycloud7@icloud.com'
to_emails = ['abdul12391@gmail.com', 'arycloud7@gmail.com']
subject = "Certificate from Nami Montana"
message = 'Enjoy your certificate.'
email = EmailMessage(subject, body=pdf, from_email=settings.EMAIL_HOST_USER, to=to_emails)
# email.attach("certificate.pdf", pdf, "application/pdf")
email.content_subtype = "pdf"  # Main content is now text/html
email.encoding = 'ISO-8859-1'
email.send()
return HttpResponse(pdf, content_type='application/pdf')

请帮帮我！

提前致谢！

Answer 1

正如您在Weasysprint文档中看到的那样，调用方法write_pdf()会将文档呈现为单个File。

http://weasyprint.readthedocs.io/en/stable/tutorial.html

获得HTML对象后，调用其write_pdf（）或write_png（）在单个PDF或PNG文件中获取渲染文档的方法。

另外，他们提到了

没有参数，这些方法在内存中返回一个字节字符串。

因此，您可以获取其PDF字节字符串并将其用于附件或传递文件名以将PDF写入。

您还可以向write_pdf()发送可写文件对象。

如果您传递文件名或可写文件对象，他们会直接写在那里。

您可以生成并附加PDF文件：

pdf = weasyprint.HTML(string=html).write_pdf()
...
email.attach("certificate.pdf", pdf, "application/pdf")

如果成功，您也可以发送200响应，如果失败则发送500响应。

关于SMTP服务器的说明

通常，您需要一个SMTP邮件服务器才能将邮件转发到目的地。

正如您可以从Django document send_mail阅读，需要一些configuration：

使用EMAIL_HOST和EMAIL_PORT设置中指定的SMTP主机和端口发送邮件。 EMAIL_HOST_USER和EMAIL_HOST_PASSWORD设置（如果已设置）用于向SMTP服务器进行身份验证，EMAIL_USE_TLS和EMAIL_USE_SSL设置控制是否使用安全连接。

然后，您可以使用send_mail()以及以下参数将邮件中继到本地SMTP服务器。

send_mail（subject，message，from_email，recipient_list，fail_silently = False，auth_user = None，auth_password = None，connection = None，html_message = None）

注意：不要错过身份验证参数。

Answer 2

以上是上述代码的完整工作版本：

    user_infor = ast.literal_eval(ipn_obj.custom)
    if int(user_infor['taggedArticles']) > 11:
        # generate and send an email with pdf certificate file to the user's email
        user_info = {
            "name": user_infor['name'],
            "hours": user_infor['hours'],
            "taggedArticles": user_infor['taggedArticles'],
            "email": user_infor['email'],
        }
        html = render_to_string('users/certificate_template.html',
                                {'user': user_info})
        response = HttpResponse(content_type='application/pdf')
        response['Content-Disposition'] = 'filename=certificate_{}'.format(user_info['name']) + '.pdf'
        pdf = weasyprint.HTML(string=html, base_url='http://8d8093d5.ngrok.io/users/process/').write_pdf(
            stylesheets=[weasyprint.CSS(string='body { font-family: serif}')])
        to_emails = [str(user_infor['email'])]
        subject = "Certificate from Nami Montana"
        email = EmailMessage(subject, body=pdf, from_email=settings.EMAIL_HOST_USER, to=to_emails)
        email.attach("certificate_{}".format(user_infor['name']) + '.pdf', pdf, "application/pdf")
        email.content_subtype = "pdf"  # Main content is now text/html
        email.encoding = 'us-ascii'
        email.send()

Answer 3

此代码适用于我

    template = get_template('admin/invoice.html')
    context = {
        "billno": bill_num,
        "billdate": bill_date,
        "patientname": patient_name,
        "totalbill": total_bill,
        "billprocedure": invoice_cal,

    }

    html  = template.render(context)
    result = BytesIO()
    pdf = pisa.pisaDocument(BytesIO(html.encode("ISO-8859-1")), result)#, link_callback=fetch_resources)
    pdf = result.getvalue()
    filename = 'Invoice.pdf'
    to_emails = ['receiver@gmail.com']
    subject = "From CliMan"
    email = EmailMessage(subject, "helloji", from_email=settings.EMAIL_HOST_USER, to=to_emails)
    email.attach(filename, pdf, "application/pdf")
    email.send(fail_silently=False)

从html模板生成PDF并通过Django中的电子邮件发送

3 个答案: