feat: 页面配置serializer版 (#6750)

* feat: 页面配置serializer版

* perf: 优化配置

* perf: 优化设置

* perf: 优化设置

* perf: 优化配置页面

* perf: 基本完成设置优化

Co-authored-by: feng626 <1304903146@qq.com>
Co-authored-by: ibuler <ibuler@qq.com>

apps/settings/api/email.py

@@ -0,0 +1,68 @@
+# -*- coding: utf-8 -*-
+#
+
+from smtplib import SMTPSenderRefused
+from rest_framework.views import Response, APIView
+from django.core.mail import send_mail, get_connection
+from django.utils.translation import ugettext_lazy as _
+
+from common.permissions import IsSuperUser
+from common.utils import get_logger
+from .. import serializers
+
+logger = get_logger(__file__)
+
+__all__ = ['MailTestingAPI']
+
+
+class MailTestingAPI(APIView):
+    permission_classes = (IsSuperUser,)
+    serializer_class = serializers.MailTestSerializer
+    success_message = _("Test mail sent to {}, please check")
+
+    def post(self, request):
+        serializer = self.serializer_class(data=request.data)
+        serializer.is_valid(raise_exception=True)
+
+        email_host = serializer.validated_data['EMAIL_HOST']
+        email_port = serializer.validated_data['EMAIL_PORT']
+        email_host_user = serializer.validated_data["EMAIL_HOST_USER"]
+        email_host_password = serializer.validated_data['EMAIL_HOST_PASSWORD']
+        email_from = serializer.validated_data["EMAIL_FROM"]
+        email_recipient = serializer.validated_data["EMAIL_RECIPIENT"]
+        email_use_ssl = serializer.validated_data['EMAIL_USE_SSL']
+        email_use_tls = serializer.validated_data['EMAIL_USE_TLS']
+
+        # 设置 settings 的值，会导致动态配置在当前进程失效
+        # for k, v in serializer.validated_data.items():
+        #     if k.startswith('EMAIL'):
+        #         setattr(settings, k, v)
+        try:
+            subject = "Test"
+            message = "Test smtp setting"
+            email_from = email_from or email_host_user
+            email_recipient = email_recipient or email_from
+            connection = get_connection(
+                host=email_host, port=email_port,
+                username=email_host_user, password=email_host_password,
+                use_tls=email_use_tls, use_ssl=email_use_ssl,
+            )
+            send_mail(
+                subject, message, email_from, [email_recipient],
+                connection=connection
+            )
+        except SMTPSenderRefused as e:
+            error = e.smtp_error
+            if isinstance(error, bytes):
+                for coding in ('gbk', 'utf8'):
+                    try:
+                        error = error.decode(coding)
+                    except UnicodeDecodeError:
+                        continue
+                    else:
+                        break
+            return Response({"error": str(error)}, status=400)
+        except Exception as e:
+            logger.error(e)
+            return Response({"error": str(e)}, status=400)
+        return Response({"msg": self.success_message.format(email_recipient)})