【Unity】如何在Unity里使用文心一言AI

想要使用文心一言，首先要登录百度智能云千帆控制台

https://cloud.baidu.com/product/wenxinworkshop?track=developer_qianfan_tanchuang

1.在控制台找到应用接入 - 然后点击创建应用

2.填写应用信息

3.创建之后，记下API Key 和 Secret Key，等会会用到

4.打开Unity，建一个简单的聊天场景

5.加入测试代码

public class ChatAI: MonoBehaviour
{
    public string token;
    //这里填写百度千帆大模型里的应用api key
    public string api_key = "xxxxxx";
    //这里填写百度千帆大模型里的应用secret key
    public string secret_key = "xxxxxxxxx";
    //发送按钮
    public Button sendBtn;
    //输入框
    public TMP_InputField info;
    //AI回应
    public TextMeshProUGUI responseText;
    // 历史对话
    private List<message> historyList = new List<message>();

    public void Awake()
    {
        //初始化文心一言,获取token
        StartCoroutine(GetToken());
        sendBtn.onClick.AddListener(OnSend);
    }
   
    public void OnSend()
    {
        OnSpeak(info.text);
    }
    //开始对话
    public void OnSpeak(string talk )
    {
        StartCoroutine(Request(talk));
    }
    private IEnumerator GetToken()
    {
        //获取token的api地址
        string _token_url = string.Format("https://aip.baidubce.com/oauth/2.0/token" + "?client_id={0}&client_secret={1}&grant_type=client_credentials" , api_key, secret_key);
        using (UnityWebRequest request = new UnityWebRequest(_token_url, "POST"))
        {
            request.downloadHandler = (DownloadHandler)new DownloadHandlerBuffer();
            yield return request.SendWebRequest();
            if (request.isDone)
            {
                string msg = request.downloadHandler.text;
                TokenInfo mTokenInfo = JsonUtility.FromJson<TokenInfo>(msg);
                //保存Token
                token = mTokenInfo.access_token;
            }
        }
    }
   
    /// <summary>
    /// 发送数据
    /// </summary> 
    /// <param name="_postWord"></param>
    /// <param name="_callback"></param>
    /// <returns></returns>
    public IEnumerator Request(string talk)
    {
        string url = "https://aip.baidubce.com/rpc/2.0/ai_custom/v1/wenxinworkshop/chat/";
        string postUrl = url + GetModelType(ModelType.ERNIE_Bot) + "?access_token=" + token;
        historyList.Add(new message("user", talk));
        RequestData postData = new RequestData
        {
            messages = historyList
        };
        using (UnityWebRequest request = new UnityWebRequest(postUrl, "POST"))
        {
            string jsonData = XJsonParser.ToJson<RequestData>(postData);
            byte[] data = System.Text.Encoding.UTF8.GetBytes(jsonData);
            request.uploadHandler = (UploadHandler)new UploadHandlerRaw(data);
            request.downloadHandler = (DownloadHandler)new DownloadHandlerBuffer();
            request.SetRequestHeader("Content-Type", "application/json");
            yield return request.SendWebRequest();
            if (request.responseCode == 200)
            {
                string _msg = request.downloadHandler.text;
                ResponseData response; 
                XJsonParser.ToObject(out response, _msg);
                //加入历史数据
                historyList.Add(new message("assistant", response.result));
                responseText.text = response.result;
            }
        }
    }
 
    /// <summary>
    /// 获取资源
    /// </summary>
    /// <param name="type"></param>
    /// <returns></returns>
    private string GetModelType(ModelType type)
    {
        if (type == ModelType.ERNIE_Bot)
        {
            return "completions";
        }
        if (type == ModelType.ERNIE_Bot_turbo)
        {
            return "eb-instant";
        }
        if (type == ModelType.BLOOMZ_7B)
        {
            return "bloomz_7b1";
        }
        if (type == ModelType.Qianfan_BLOOMZ_7B_compressed)
        {
            return "qianfan_bloomz_7b_compressed";
        }
        if (type == ModelType.ChatGLM2_6B_32K)
        {
            return "chatglm2_6b_32k";
        }
        if (type == ModelType.Llama_2_7B_Chat)
        {
            return "llama_2_7b";
        }
        if (type == ModelType.Llama_2_13B_Chat)
        {
            return "llama_2_13b";
        }
        if (type == ModelType.Llama_2_70B_Chat)
        {
            return "llama_2_70b";
        }
        if (type == ModelType.Qianfan_Chinese_Llama_2_7B)
        {
            return "qianfan_chinese_llama_2_7b";
        }
        if (type == ModelType.AquilaChat_7B)
        {
            return "aquilachat_7b";
        }
        return "";
    }
 
    //发送的数据
    private class RequestData
    {
        //发送的消息
        public List<message> messages = new List<message>();
        //是否流式输出
        public bool stream = false;
        public string user_id = string.Empty;
    }
    
    private class message
    {
        //角色
        public string role =string.Empty;
        //对话内容
        public string content = string.Empty;
        public message() { }
        public message(string _role, string _content  )
        {
            if (_role != "")
            {
                role = _role;
            }
            content = _content;
        }
    }
    //接收的数据
    private class ResponseData
    {
        //本轮对话的id 
        public string id = string.Empty;
        public int created;
        //表示当前子句的序号,只有在流式接口模式下会返回该字段
        public int sentence_id;
        //表示当前子句是否是最后一句,只有在流式接口模式下会返回该字段
        public bool is_end;
        //表示当前子句是否是最后一句,只有在流式接口模式下会返回该字段
        public bool is_truncated;
        //返回的文本
        public string result = string.Empty;
        //表示输入是否存在安全
        public bool need_clear_history;
        //当need_clear_history为true时，此字段会告知第几轮对话有敏感信息，如果是当前问题，ban_round=-1
        public int ban_round;
        //token统计信息，token数 = 汉字数+单词数*1.3 
        public Usage usage = new Usage();
    }
  
    private class Usage
    {
        //问题tokens数
        public int prompt_tokens;
        //回答tokens数
        public int completion_tokens;
        //tokens总数
        public int total_tokens;
    }

   
    /// <summary>
    /// 模型名称
    /// </summary>
    public enum ModelType
    {
        ERNIE_Bot,
        ERNIE_Bot_turbo,
        BLOOMZ_7B,
        Qianfan_BLOOMZ_7B_compressed,
        ChatGLM2_6B_32K,
        Llama_2_7B_Chat,
        Llama_2_13B_Chat,
        Llama_2_70B_Chat,
        Qianfan_Chinese_Llama_2_7B,
        AquilaChat_7B,
    }

    /// <summary>
    /// 返回的token
    /// </summary>
    [System.Serializable]
    public class TokenInfo
    {
        public string access_token = string.Empty;
    }
}

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6.输入问题，然后点击发送。

等待回复会有一点点时间，实际开发的时候，可以加一些过渡动画

7.接收到来着文心一言的回答。

8.本教程只作简单的演示功能，开发者可以根据自己的需求设计出丰富的对话功能。

附官方文档
https://cloud.baidu.com/doc/WENXINWORKSHOP/s/flfmc9do2

9.另外我们平时使用文心一言是免费的，但是代码调用文心一言的API是付费的