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76 lines
2.3 KiB
Go
76 lines
2.3 KiB
Go
/*
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* Copyright 2025 CloudWeGo Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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// This example shows how to configure the jsonfix middleware on a ToolsNode
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// to repair invalid JSON arguments before invoking a local tool.
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// Run: go run ./components/tool/middlewares/jsonfix/example
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package main
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import (
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"context"
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"fmt"
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"github.com/cloudwego/eino/components/tool"
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"github.com/cloudwego/eino/components/tool/utils"
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"github.com/cloudwego/eino/compose"
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"github.com/cloudwego/eino/schema"
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jsonfix "github.com/cloudwego/eino-examples/components/tool/middlewares/jsonfix"
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)
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type greetReq struct {
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Name string `json:"name"`
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}
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type greetResp struct {
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Greeting string `json:"greeting"`
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}
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func main() {
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ctx := context.Background()
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// Define a simple local tool with JSON input/output using InferTool.
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greeter, _ := utils.InferTool("greeter", "greet by name", func(ctx context.Context, in *greetReq) (*greetResp, error) {
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return &greetResp{Greeting: "Hello, " + in.Name}, nil
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})
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// Create ToolsNode and register the jsonfix middleware.
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tn, _ := compose.NewToolNode(ctx, &compose.ToolsNodeConfig{
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Tools: []tool.BaseTool{greeter},
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ToolCallMiddlewares: []compose.ToolMiddleware{jsonfix.Middleware()},
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})
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// Craft an Assistant message with an invalid JSON argument to simulate LLM output.
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msg := schema.AssistantMessage("", nil)
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msg.ToolCalls = []schema.ToolCall{{
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ID: "1",
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Function: schema.FunctionCall{
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Name: "greeter",
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Arguments: "noise <|FunctionCallBegin|>{\"name\":\"Alice\"1\"\"}<|FunctionCallEnd|>",
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},
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}}
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// ToolsNode invokes the tool. Middleware repairs the argument first.
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outs, err := tn.Invoke(ctx, msg)
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if err != nil {
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fmt.Println("error:", err)
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return
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}
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for _, o := range outs {
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fmt.Println("tool:", o.ToolName, "id:", o.ToolCallID, "content:", o.Content)
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}
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}
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