diff --git a/internal/apps/ai-proxy/filters/message-context/filter.go b/internal/apps/ai-proxy/filters/message-context/filter.go
index 77ea406678b..7fb971feb8a 100644
--- a/internal/apps/ai-proxy/filters/message-context/filter.go
+++ b/internal/apps/ai-proxy/filters/message-context/filter.go
@@ -26,9 +26,9 @@ import (
 	"github.com/sashabaranov/go-openai"
 	"gopkg.in/yaml.v3"
 
-	"github.com/erda-project/erda-infra/base/logs"
 	promptpb "github.com/erda-project/erda-proto-go/apps/aiproxy/prompt/pb"
 	sessionpb "github.com/erda-project/erda-proto-go/apps/aiproxy/session/pb"
+	"github.com/erda-project/erda/internal/apps/ai-proxy/common/ctxhelper"
 	"github.com/erda-project/erda/internal/apps/ai-proxy/models/message"
 	"github.com/erda-project/erda/internal/apps/ai-proxy/providers/dao"
 	"github.com/erda-project/erda/internal/apps/ai-proxy/vars"
@@ -70,7 +70,7 @@ func (c *SessionContext) Enable(_ context.Context, req *http.Request) bool {
 
 func (c *SessionContext) OnRequest(ctx context.Context, _ http.ResponseWriter, infor reverseproxy.HttpInfor) (signal reverseproxy.Signal, err error) {
 	var (
-		l  = ctx.Value(reverseproxy.LoggerCtxKey{}).(logs.Logger)
+		l  = ctxhelper.GetLogger(ctx)
 		db = ctx.Value(vars.CtxKeyDAO{}).(dao.DAO)
 	)
 
@@ -99,6 +99,11 @@ func (c *SessionContext) OnRequest(ctx context.Context, _ http.ResponseWriter, i
 		return reverseproxy.Intercept, err
 	}
 	for _, msg := range chatCompletionRequest.Messages {
+		// handle user message, wrap by '|start| your question here |end|'
+		// to avoid from content-filter
+		if msg.Role == openai.ChatMessageRoleUser {
+			msg.Content = strutil.Concat("|start|", msg.Content, "|end|")
+		}
 		requestedMessages = append(requestedMessages, msg)
 	}
 
@@ -176,7 +181,11 @@ func (c *SessionContext) OnRequest(ctx context.Context, _ http.ResponseWriter, i
 
 	// set to request body
 	chatCompletionRequest.Messages = allMessages
-	b, _ := json.Marshal(&chatCompletionRequest)
+	b, err := json.Marshal(&chatCompletionRequest)
+	if err != nil {
+		l.Errorf("failed to marshal request body, err: %v", err)
+		return reverseproxy.Intercept, err
+	}
 	infor.SetBody(io.NopCloser(bytes.NewBuffer(b)), int64(len(b)))
 
 	return reverseproxy.Continue, nil