Issue with encoding in mailer responder

[nadouani]

Request Type

Bug

Work Environment

Question	Answer
Cortex version / git hash	2.1.2
Package Type	Docker thehiveproject/thehive:latest

Problem Description

Steps to Reproduce

1. Create case with russian letters in Title or description in TheHive
2. launch Mailer Responder from case menu
3. Cortex shows following error for mailer responder

Invalid output
Traceback (most recent call last):
  File "Mailer/mailer.py", line 59, in <module>
    Mailer().run()
  File "Mailer/mailer.py", line 47, in run
    msg.attach(MIMEText(description, 'plain'))
  File "/usr/lib/python2.7/email/mime/text.py", line 30, in __init__
    self.set_payload(_text, _charset)
  File "/usr/lib/python2.7/email/message.py", line 226, in set_payload
    self.set_charset(charset)
  File "/usr/lib/python2.7/email/message.py", line 262, in set_charset
    self._payload = self._payload.encode(charset.output_charset)
UnicodeEncodeError: 'ascii' codec can't encode characters in position 0-5: ordinal not in range(128)

Possible Solutions

in mailer.py do encode('utf-8') of title and description

title = self.get_param('data.title', None, 'title is missing')
**title=title.encode('utf-8')**
description = self.get_param('data.description', None, 'description is missing')
**description=description.encode('utf-8')**

Thanks to @bsploit for the issue and solution