从提交的表单将文件附加到电子邮件

Question

我有一个功能，当用户提交我的表格和上传文件时，保存附件，这个功能还发送电子邮件。我希望这个函数使用提交的文件作为电子邮件的附件。我试过这样做：

def send_email(subject, sender, recipients, text_body):
    FILE_TYPES = set(['txt', 'doc', 'docx', 'odt', 'pdf', 'rtf', 'text', 'wks', 'wps', 'wpd'])
    form = ApplicationForm (request.files)
    submit_name = form.file_upload.data.filename
    mail = Mail(app)
    msg = Message(subject, sender=sender, recipients=recipients)
    msg.body = text_body
    if '.' in submit_name and submit_name.rsplit('.', 1)[1] in FILE_TYPES:
        filename = secure_filename(submit_name)
        form.file_upload.data.save('uploads/' + filename)
        with app.open_resource('uploads/' + filename) as fp:
            msg.attach(filename, fp.read()) #attaches the submitted file to the email
        print 'file sent successfully'
     mail.send(msg)

编辑：现在收到以下错误：

^{pr2}$

回溯：

Traceback (most recent call last):
  File "C:\PYTHON27\lib\site-packages\flask\app.py", line 2000, in __call__
    return self.wsgi_app(environ, start_response)
  File "C:\PYTHON27\lib\site-packages\flask\app.py", line 1991, in wsgi_app
    response = self.make_response(self.handle_exception(e))
  File "C:\PYTHON27\lib\site-packages\flask\app.py", line 1567, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "C:\PYTHON27\lib\site-packages\flask\app.py", line 1988, in wsgi_app
    response = self.full_dispatch_request()
  File "C:\PYTHON27\lib\site-packages\flask\app.py", line 1641, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "C:\PYTHON27\lib\site-packages\flask\app.py", line 1544, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "C:\PYTHON27\lib\site-packages\flask\app.py", line 1639, in full_dispatch_request
    rv = self.dispatch_request()
  File "C:\PYTHON27\lib\site-packages\flask\app.py", line 1625, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "C:\Users\richard.danvers\application\app\views.py", line 87, in index
    department_data=form.department.data
  File "C:\Users\richard.danvers\application\app\views.py", line 30, in send_email
    mail.send(msg) # if no file is uploaded email is sent without any attachment
  File "C:\PYTHON27\lib\site-packages\flask_mail.py", line 492, in send
    message.send(connection)
  File "C:\PYTHON27\lib\site-packages\flask_mail.py", line 427, in send
    connection.send(self)
  File "C:\PYTHON27\lib\site-packages\flask_mail.py", line 190, in send
    message.as_bytes() if PY3 else message.as_string(),
  File "C:\PYTHON27\lib\site-packages\flask_mail.py", line 381, in as_string
    return self._message().as_string()
  File "C:\PYTHON27\lib\site-packages\flask_mail.py", line 349, in _message
    f = MIMEBase(*attachment.content_type.split('/'))
TypeError: __init__() takes exactly 3 arguments (75 given)

Answer 1

我看到两个问题

• 您在"upload/"+filename中保存，但您从filename读取-必须从"upload/"+filename读取

• 当你附加文件时，你不做mail.send(msg)所以你不发送邮件。您需要不带“else”的代码：

  if '.' in submit_name and submit_name.rsplit('.', 1)[1] in FILE_TYPES:
      filename = secure_filename(submit_name)
      form.file_upload.data.save('uploads/' + filename)
      with app.open_resource('uploads/' + filename) as fp:
          msg.attach(filename, fp.read())
          print 'file sent successfully'
  
  # send mail with or without attachment
  
  mail.send(msg)