编辑. 找到了解决方案:似乎 pdf 文档必须是 base64 编码的。像这样编辑异步视图:
import base64
result = export_pdf(request)
encoded = base64.b64encode(result.getvalue())
email = mandrill.Mandrill(settings.MANDRILL_API_KEY)
email.messages.send_template(mandrill_template, [], {'to':[{'email':user.email}], 'subject':subject, 'text':message, attachments':[{'type':'application/pdf', 'name':'pdf file', 'content':encoded}] })
编辑结束
我在发送使用 xhtml2pdf/pisa 创建的 pdf 文档作为 Mandrill 中的附件时遇到问题。该应用程序的工作方式如下:一个 content_view 调用一个async_view
which
- 生成 pdf(通过调用 export_pdf 函数)和
- 发送带有附件的电子邮件。
pdf 文档似乎有效(如果我修改async_view
为HttpResponse
pdf 而不是发送它,我会看到一个有效的 pdf 文档)。但是将它发送到 Mandrill 会返回一个编码错误:
UnicodeDecodeError:“utf8”编解码器无法解码位置 11 中的字节 0x93:无效的起始字节。
我尝试按照此处提到的方式解决它(Python: Sanitize a string for unicode?)。在这种情况下,不再引发错误,但我作为电子邮件附件获得的 pdf 被视为“文本/纯文本”并且不可读。谢谢您的帮助!
异步视图
pdf_doc = export_pdf(request).getvalue() # .decode("windows-1252").encode("utf-8", 'ignore') would not raise an error but would be considered as plain text
email = mandrill.Mandrill(settings.MANDRILL_API_KEY)
email.messages.send_template(mandrill_template, [], {'to':[{'email':user.email}], 'subject':subject, 'text':message, attachments':[{'type':'application/pdf', 'name':'pdf file', 'content':pdf_doc}] })
# return HttpResponse(pdf_doc, mimetype='application/pdf') would return a well formatted pdf
export_pdf 函数
def export_pdf(request):
html = render_to_string('pdf.html', { 'pagesize' : 'A4', }, context_instance=RequestContext(request,{
'text': text,
},))
result = cStringIO.StringIO()
pdf = pisa.pisaDocument(StringIO.StringIO(html), dest=result, encoding='UTF-8')
if not pdf.err:
return result
else:
return None
回溯的有趣部分是
(...)
File "/home/raphael/Applications/Virtualenvs/apps/local/lib/python2.7/site-packages/mandrill.py", line 1476, in send_template
return self.master.call('messages/send-template', _params)
File "/home/raphael/Applications/Virtualenvs/apps/local/lib/python2.7/site-packages/mandrill.py", line 137, in call
params = json.dumps(params)
File "/home/raphael/Applications/Virtualenvs/apps/local/lib/python2.7/site-packages/simplejson/__init__.py", line 354, in dumps
return _default_encoder.encode(obj)
File "/home/raphael/Applications/Virtualenvs/apps/local/lib/python2.7/site-packages/simplejson/encoder.py", line 262, in encode
chunks = self.iterencode(o, _one_shot=True)
File "/home/raphael/Applications/Virtualenvs/apps/local/lib/python2.7/site-packages/simplejson/encoder.py", line 340, in iterencode
return _iterencode(o, 0)
UnicodeDecodeError: 'utf8' codec can't decode byte 0x93 in position 11: invalid start byte