def update(self, request, *args, **kwargs):
        "Reply to message"

        if request.data is None:
            return rc.BAD_REQUEST

        pkfield = kwargs.get(self.model._meta.pk.name) or request.data.get(
            self.model._meta.pk.name)

        if not pkfield:
            return rc.BAD_REQUEST

        user = request.user.profile

        try:
            message = self.model.objects.get(pk=pkfield)
        except __HOLE__:
            return rc.NOT_FOUND

        if not user.has_permission(message):
            return rc.FORBIDDEN

        reply = Message()
        reply.author = user.get_contact()
        if not reply.author:
            return rc.FORBIDDEN

        reply.reply_to = message
        form = MessageReplyForm(
            user, message.stream_id, message, request.data, instance=reply)
        if form.is_valid():
            reply = form.save()
            reply.set_user_from_request(request)
            # Add author to recipients
            reply.recipients.add(reply.author)
            message.read_by.clear()

            try:
                # if email entered create contact and add to recipients
                if 'multicomplete_recipients' in request.POST and request.POST['multicomplete_recipients']:
                    try:
                        conf = ModuleSetting.get_for_module(
                            'treeio.messaging', 'default_contact_type')[0]
                        default_contact_type = ContactType.objects.get(
                            pk=long(conf.value))
                    except Exception:
                        default_contact_type = None
                    emails = request.POST[
                        'multicomplete_recipients'].split(',')
                    for email in emails:
                        emailstr = unicode(email).strip()
                        if re.match('[a-zA-Z0-9+_\-\.]+@[0-9a-zA-Z][.-0-9a-zA-Z]*.[a-zA-Z]+', emailstr):
                            contact, created = Contact.get_or_create_by_email(
                                emailstr, contact_type=default_contact_type)
                            reply.recipients.add(contact)
                            if created:
                                contact.set_user_from_request(request)
            except:
                pass

            # Add each recipient of the reply to the original message
            for recipient in reply.recipients.all():
                message.recipients.add(recipient)

            # send email to all recipients
            reply.send_email()
            return reply

        else:
            self.status = 400
            return form.errors
dataset/ETHPy150Open treeio/treeio/treeio/messaging/api/handlers.py/MessageHandler.update