fix: delete redundant fields in plugin output data (#469)

backend/domain/workflow/internal/execute/callback.go

@@ -27,6 +27,8 @@ import (
 	"strings"
 	"time"
 
+	"github.com/coze-dev/coze-studio/backend/pkg/sonic"
+
 	"github.com/cloudwego/eino/callbacks"
 	"github.com/cloudwego/eino/components/tool"
 	"github.com/cloudwego/eino/compose"
@@ -1271,13 +1273,21 @@ func (t *ToolHandler) OnStart(ctx context.Context, info *callbacks.RunInfo,
 		return ctx
 	}
 
+	var args map[string]any
+	if input.ArgumentsInJSON != "" {
+		if err := sonic.UnmarshalString(input.ArgumentsInJSON, &args); err != nil {
+			logs.Errorf("failed to unmarshal arguments: %v", err)
+			return ctx
+		}
+	}
+
 	t.ch <- &Event{
 		Type:    FunctionCall,
 		Context: GetExeCtx(ctx),
 		functionCall: &entity.FunctionCallInfo{
 			FunctionInfo: t.info,
 			CallID:       compose.GetToolCallID(ctx),
-			Arguments:    input.ArgumentsInJSON,
+			Arguments:    args,
 		},
 	}
 

backend/domain/workflow/internal/execute/event_handle.go

@@ -887,7 +887,12 @@ func getFCInfos(ctx context.Context, nodeKey vo.NodeKey) map[string]*fcInfo {
 }
 
 func (f *fcInfo) inputString() string {
+	if f.input == nil {
+		return ""
+	}
+
 	m, err := sonic.MarshalString(f.input)
+
 	if err != nil {
 		panic(err)
 	}
@@ -899,12 +904,5 @@ func (f *fcInfo) outputString() string {
 		return ""
 	}
 
-	m := map[string]any{
-		"data": f.output.Response, // TODO: traceID, code, message?
-	}
-	b, err := sonic.MarshalString(m)
-	if err != nil {
-		panic(err)
-	}
-	return b
+	return f.output.Response
 }