dify第一次
This commit is contained in:
@@ -61,6 +61,40 @@
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<artifactId>ruoyi-generator</artifactId>
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</dependency>
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<dependency>
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<groupId>org.projectlombok</groupId>
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<artifactId>lombok</artifactId>
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<scope>provided</scope>
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</dependency>
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<!-- OkHttp,用于发起 API 请求(可选) -->
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<dependency>
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<groupId>com.squareup.okhttp3</groupId>
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<artifactId>okhttp</artifactId>
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<version>4.9.3</version>
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</dependency>
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<dependency>
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<groupId>org.json</groupId>
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<artifactId>json</artifactId>
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<version>20230227</version>
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</dependency>
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<dependency>
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<groupId>com.squareup.okhttp3</groupId>
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<artifactId>okhttp</artifactId>
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<version>4.9.3</version>
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</dependency>
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<dependency>
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<groupId>cn.hutool</groupId>
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<artifactId>hutool-all</artifactId>
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<version>5.8.20</version>
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</dependency>
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<dependency>
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<groupId>org.json</groupId>
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<artifactId>json</artifactId>
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<version>20160810</version>
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</dependency>
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</dependencies>
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<build>
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@@ -0,0 +1,479 @@
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package com.ruoyi.web.api;
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import com.fasterxml.jackson.databind.JsonNode;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import com.ruoyi.common.core.controller.BaseController;
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import com.ruoyi.common.core.domain.AjaxResult;
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import okhttp3.*;
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import okhttp3.RequestBody;
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import okhttp3.ResponseBody;
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import org.springframework.web.bind.annotation.*;
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import org.springframework.web.servlet.mvc.method.annotation.SseEmitter;
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.time.Duration;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.concurrent.CompletableFuture;
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/**
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* Dify聊天控制器
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* <p>
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* 该控制器用于处理与Dify AI聊天服务的通信,提供流式聊天功能。
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* Dify是一个LLM应用开发平台,此控制器通过调用其API实现与AI模型的交互。
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* </p>
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*/
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@RestController
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@RequestMapping("/api/chat")
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public class DifyChatController extends BaseController {
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/**
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* Dify API的URL地址
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* 用于发送聊天消息请求到Dify服务
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*/
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private static final String DIFY_API_URL = "https://api.dify.ai/v1/chat-messages";
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/**
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* Dify反馈API的基础URL
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* 用于提交消息反馈(点赞、点踩等)
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*/
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private static final String DIFY_FEEDBACK_BASE_URL = "https://api.dify.ai/v1/messages";
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private static final String DIFY_API_HISTORY_URL = "https://api.dify.ai/v1/messages";
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/**
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* Dify会话API的基础URL
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* 用于获取会话列表
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*/
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private static final String DIFY_CONVERSATIONS_URL = "https://api.dify.ai/v1/conversations";
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/**
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* Dify API的访问密钥
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* 用于身份验证,授权访问Dify服务
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*/
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private static final String DIFY_API_KEY = "app-7DEqa9NIpCMGcRJK9mg7zL2f";
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/**
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* HTTP客户端实例
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* 配置了5分钟的读取超时时间,用于与Dify API进行通信
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*/
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private final OkHttpClient client = new OkHttpClient.Builder()
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.readTimeout(Duration.ofMinutes(5))
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.build();
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/**
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* JSON对象映射器
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* 用于处理JSON数据的序列化和反序列化
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*/
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private final ObjectMapper mapper = new ObjectMapper();
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/**
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* 处理流式聊天请求的端点
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* <p>
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* 该方法接收客户端发送的聊天请求,并通过SSE(Server-Sent Events)方式将响应流式传输回客户端。
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* 使用异步处理避免阻塞主线程,提高系统并发处理能力。
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* </p>
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*
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* @param requestData 包含聊天请求数据的Map,应包含以下字段:
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* - query: 用户的聊天消息内容(必需)
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* - user: 用户标识符(必需)
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* - conversation_id: 对话ID,用于维持对话上下文(可选)
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* - inputs: 输入参数,用于传递额外的上下文信息(可选)
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* @return SseEmitter 用于向客户端流式传输响应的SSE发射器
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*/
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@PostMapping("/stream")
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public SseEmitter stream(@org.springframework.web.bind.annotation.RequestBody Map<String, Object> requestData) {
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// 创建SSE发射器,设置超时时间为5分钟(300,000毫秒)
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SseEmitter emitter = new SseEmitter(300_000L);
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// 设置超时处理回调
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emitter.onTimeout(emitter::complete);
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// 设置错误处理回调
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emitter.onError(ex -> emitter.completeWithError(ex));
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// 异步执行请求处理,避免阻塞主线程
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CompletableFuture.runAsync(() -> {
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try {
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sendToDifyAndStream(requestData, emitter);
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} catch (Exception e) {
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emitter.completeWithError(e);
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}
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});
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return emitter;
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}
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/**
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* 发送请求到Dify并流式传输响应
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* <p>
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* 该方法构建请求参数,调用Dify API,并处理返回的流式响应数据。
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* 根据Dify API返回的不同事件类型,将数据通过SSE发送给客户端。
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* </p>
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*
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* @param requestData 包含聊天请求数据的Map,包含用户消息、用户标识等信息
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* @param emitter 用于向客户端发送SSE事件的发射器
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* @throws IOException 当网络请求或IO操作失败时抛出
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*/
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private void sendToDifyAndStream(Map<String, Object> requestData, SseEmitter emitter) throws IOException {
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// 检查必需的参数是否存在且不为空
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if (!requestData.containsKey("user_name") || requestData.get("user_name") == null || requestData.get("user_name").toString().trim().isEmpty()) {
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try {
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emitter.send(SseEmitter.event().name("error").data("user_name 参数不能为空"));
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emitter.complete();
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return;
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} catch (Exception e) {
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emitter.completeWithError(e);
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return;
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}
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}
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if (!requestData.containsKey("user_token") || requestData.get("user_token") == null || requestData.get("user_token").toString().trim().isEmpty()) {
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try {
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emitter.send(SseEmitter.event().name("error").data("user_token 参数不能为空"));
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emitter.complete();
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return;
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} catch (Exception e) {
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emitter.completeWithError(e);
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return;
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}
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}
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if (!requestData.containsKey("user_role") || requestData.get("user_role") == null || requestData.get("user_role").toString().trim().isEmpty()) {
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try {
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emitter.send(SseEmitter.event().name("error").data("user_role 参数不能为空"));
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emitter.complete();
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return;
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} catch (Exception e) {
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emitter.completeWithError(e);
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return;
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}
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}
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// 构建请求体参数
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Map<String, Object> bodyMap = new HashMap<>();
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bodyMap.put("query", requestData.get("query")); // 用户消息内容
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bodyMap.put("user", requestData.get("user")); // 用户标识
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bodyMap.put("response_mode", "streaming"); // 设置为流式响应模式
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// 如果存在对话ID,则添加到请求参数中
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if (requestData.containsKey("conversation_id")) {
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bodyMap.put("conversation_id", requestData.get("conversation_id"));
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}
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// 添加输入参数,默认为空HashMap
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Map<String, Object> inputs = (Map<String, Object>) requestData.getOrDefault("inputs", new HashMap<>());
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// 添加用户相关信息到inputs中
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inputs.put("user_name", requestData.get("user_name"));
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inputs.put("user_token", requestData.get("user_token"));
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inputs.put("user_role", requestData.get("user_role"));
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bodyMap.put("inputs", inputs);
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// 自动为对话生成名称
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bodyMap.put("auto_generate_name", false);
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// 将请求参数转换为JSON字符串
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String jsonBody = mapper.writeValueAsString(bodyMap);
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// 创建请求体对象
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RequestBody body = RequestBody.create(jsonBody, MediaType.get("application/json; charset=utf-8"));
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// 构建HTTP请求
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Request httpRequest = new Request.Builder()
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.url(DIFY_API_URL) // 设置请求URL
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.addHeader("Authorization", "Bearer " + DIFY_API_KEY) // 添加认证头
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.addHeader("Content-Type", "application/json") // 设置内容类型
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.post(body) // 设置为POST请求
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.build();
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// 执行HTTP请求
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try (Response httpResponse = client.newCall(httpRequest).execute()) {
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// 检查响应是否成功
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if (!httpResponse.isSuccessful()) {
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emitter.send(SseEmitter.event().name("error")
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.data("Dify 请求失败: " + httpResponse.code() + " " + httpResponse.message()));
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emitter.complete();
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return;
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}
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// 读取响应流数据
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try (BufferedReader reader = new BufferedReader(httpResponse.body().charStream())) {
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String line;
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// 逐行读取响应数据
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while ((line = reader.readLine()) != null) {
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// 跳过空行和非数据行
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if (line.isEmpty() || !line.startsWith("data:")) continue;
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// 提取JSON数据部分
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String jsonData = line.substring(5).trim();
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// 如果是结束标记则退出循环
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if ("[DONE]".equals(jsonData)) break;
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// 解析JSON数据
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JsonNode node = mapper.readTree(jsonData);
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String eventType = node.get("event").asText();
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// 根据事件类型处理不同的响应
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switch (eventType) {
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case "message":
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// 处理消息事件,发送回答内容
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String answer = node.has("answer") ? node.get("answer").asText() : "";
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emitter.send(SseEmitter.event().name("message").data(answer));
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break;
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case "message_end":
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// 处理消息结束事件,发送完整的消息节点
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emitter.send(SseEmitter.event().name("end").data(node));
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break;
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case "error":
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// 处理错误事件,发送错误信息
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String errorMsg = node.has("message") ? node.get("message").asText() : "未知错误";
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emitter.send(SseEmitter.event().name("error").data(errorMsg));
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break;
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default:
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break;
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}
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}
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}
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// 完成SSE流传输
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emitter.complete();
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} catch (Exception e) {
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// 处理异常情况
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emitter.completeWithError(e);
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}
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}
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/**
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* 提交消息反馈(点赞、点踩、撤销、文本反馈)
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* <p>
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* 该接口代理前端调用 Dify 的反馈 API,避免在前端暴露 API Key。
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* 支持:'like', 'dislike', 或 null(撤销)
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* </p>
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*
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* @param feedbackData 包含 feedback 信息的 JSON 对象
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* 示例:
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* {
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* "message_id": "msg-123",
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* "user": "user-1",
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* "rating": "like", // "like", "dislike", 或 null
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* "content": "回答很好"
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* }
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* @return 统一响应结果
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*/
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@PostMapping("/feedback")
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public AjaxResult submitFeedback(@org.springframework.web.bind.annotation.RequestBody Map<String, Object> feedbackData) {
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// 校验必要字段
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String messageId = (String) feedbackData.get("message_id");
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if (messageId == null || messageId.trim().isEmpty()) {
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return AjaxResult.error("message_id 不能为空");
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}
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// 获取 user(必填,建议前端传)
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Object userObj = feedbackData.get("user");
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if (userObj == null || userObj.toString().trim().isEmpty()) {
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return AjaxResult.error("user 不能为空");
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}
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String user = userObj.toString();
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// 处理 rating:支持 "like", "dislike", null(撤销)
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Object ratingObj = feedbackData.get("rating");
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String rating = null;
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if (ratingObj != null) {
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String raw = ratingObj.toString();
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if ("like".equals(raw)) {
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rating = "like";
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} else if ("dislike".equals(raw)) {
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rating = "dislike";
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} else {
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return AjaxResult.error("rating 必须是 'like'、'dislike' 或 null(撤销)");
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}
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}
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// 如果 ratingObj 为 null,rating 保持 null,表示撤销
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// 可选 content
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String content = (String) feedbackData.get("content");
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// 构建请求体(发送给 Dify)
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Map<String, Object> bodyMap = new HashMap<>();
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bodyMap.put("user", user);
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bodyMap.put("rating", rating); // 可以是 "like", "dislike", 或 null
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bodyMap.put("content", content); // 可选文本反馈
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try {
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// 序列化为 JSON
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String jsonBody = mapper.writeValueAsString(bodyMap);
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okhttp3.RequestBody body = okhttp3.RequestBody.create(
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jsonBody,
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MediaType.get("application/json; charset=utf-8")
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);
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// 调用 Dify API
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Request request = new Request.Builder()
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.url(DIFY_FEEDBACK_BASE_URL + "/" + messageId + "/feedbacks")
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.addHeader("Authorization", "Bearer " + DIFY_API_KEY)
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.addHeader("Content-Type", "application/json")
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.post(body)
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.build();
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try (Response response = client.newCall(request).execute()) {
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if (response.isSuccessful()) {
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return AjaxResult.success("反馈提交成功");
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} else {
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String errorMsg = "Dify 反馈失败: " + response.code();
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try (ResponseBody errorBody = response.body()) {
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if (errorBody != null) {
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errorMsg += " - " + errorBody.string();
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}
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} catch (IOException e) {
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errorMsg += " (无法读取错误详情)";
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}
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return AjaxResult.error(errorMsg);
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}
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}
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} catch (Exception e) {
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return AjaxResult.error("提交反馈失败: " + e.getMessage());
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}
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}
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/**
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* 获取会话历史消息的端点
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* <p>
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* 该方法接收客户端发送的请求,获取指定会话的历史消息记录。
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* </p>
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*
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* @param conversationId 会话ID
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* @param user 用户标识符
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* @param firstId 当前页第一条聊天记录的ID,默认null
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* @param limit 一次请求返回多少条记录,默认20条
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* @return AjaxResult 返回会话历史消息的结果
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*/
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@GetMapping("/history")
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public AjaxResult getHistoryMessages(
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@RequestParam(required = false) String conversationId,
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@RequestParam String user,
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@RequestParam(required = false) String firstId,
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@RequestParam(defaultValue = "20") int limit) {
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try {
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// 验证conversationId是否为空
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if (conversationId == null || conversationId.trim().isEmpty()) {
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return error("会话ID不能为空");
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}
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// 构建请求参数
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HttpUrl.Builder urlBuilder = HttpUrl.parse(DIFY_API_HISTORY_URL).newBuilder();
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urlBuilder.addQueryParameter("conversation_id", conversationId);
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urlBuilder.addQueryParameter("user", user);
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if (firstId != null) {
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urlBuilder.addQueryParameter("first_id", firstId);
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}
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urlBuilder.addQueryParameter("limit", String.valueOf(limit));
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// 构建HTTP请求
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Request request = new Request.Builder()
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.url(urlBuilder.build())
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.addHeader("Authorization", "Bearer " + DIFY_API_KEY)
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||||
.get()
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||||
.build();
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||||
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||||
// 执行HTTP请求
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try (Response response = client.newCall(request).execute()) {
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||||
// 检查响应是否成功
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||||
if (!response.isSuccessful()) {
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||||
return error("Dify 请求失败: " + response.code() + " " + response.message());
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||||
}
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||||
// 解析JSON响应
|
||||
JsonNode rootNode = mapper.readTree(response.body().string());
|
||||
boolean hasMore = rootNode.path("has_more").asBoolean(false);
|
||||
List<Map<String, Object>> data = mapper.convertValue(rootNode.path("data"), List.class);
|
||||
|
||||
// 构建返回结果
|
||||
Map<String, Object> result = new HashMap<>();
|
||||
result.put("limit", limit);
|
||||
result.put("has_more", hasMore);
|
||||
result.put("data", data);
|
||||
|
||||
return success(result);
|
||||
}
|
||||
} catch (IOException e) {
|
||||
return error("获取会话历史消息失败: " + e.getMessage());
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* 获取会话列表
|
||||
* <p>
|
||||
* 该方法用于获取当前用户的会话列表,默认返回最近的 20 条。
|
||||
* </p>
|
||||
*
|
||||
* @param user 用户标识符,由开发者定义规则,需保证用户标识在应用内唯一
|
||||
* @param lastId 当前页最后一条记录的 ID,默认 null
|
||||
* @param limit 一次请求返回多少条记录,默认 20 条,最大 100 条,最小 1 条
|
||||
* @param sortBy 排序字段,默认 -updated_at (按更新时间倒序排列)
|
||||
* @return AjaxResult 返回会话列表的结果
|
||||
*/
|
||||
@GetMapping("/conversations")
|
||||
public AjaxResult getConversations(
|
||||
@RequestParam String user,
|
||||
@RequestParam(required = false) String lastId,
|
||||
@RequestParam(defaultValue = "20") int limit,
|
||||
@RequestParam(defaultValue = "-updated_at") String sortBy) {
|
||||
try {
|
||||
// 参数校验
|
||||
if (user == null || user.trim().isEmpty()) {
|
||||
return error("用户标识不能为空");
|
||||
}
|
||||
|
||||
// 限制limit的范围在1-100之间
|
||||
if (limit < 1 || limit > 100) {
|
||||
return error("limit参数必须在1到100之间");
|
||||
}
|
||||
|
||||
// 构建请求参数
|
||||
HttpUrl.Builder urlBuilder = HttpUrl.parse(DIFY_CONVERSATIONS_URL).newBuilder();
|
||||
urlBuilder.addQueryParameter("user", user);
|
||||
if (lastId != null) {
|
||||
urlBuilder.addQueryParameter("last_id", lastId);
|
||||
}
|
||||
urlBuilder.addQueryParameter("limit", String.valueOf(limit));
|
||||
urlBuilder.addQueryParameter("sort_by", sortBy);
|
||||
|
||||
// 构建HTTP请求
|
||||
Request request = new Request.Builder()
|
||||
.url(urlBuilder.build())
|
||||
.addHeader("Authorization", "Bearer " + DIFY_API_KEY)
|
||||
.get()
|
||||
.build();
|
||||
|
||||
// 执行HTTP请求
|
||||
try (Response response = client.newCall(request).execute()) {
|
||||
// 检查响应是否成功
|
||||
if (!response.isSuccessful()) {
|
||||
return error("Dify 请求失败: " + response.code() + " " + response.message());
|
||||
}
|
||||
|
||||
// 解析JSON响应
|
||||
JsonNode rootNode = mapper.readTree(response.body().string());
|
||||
int resLimit = rootNode.path("limit").asInt();
|
||||
boolean hasMore = rootNode.path("has_more").asBoolean(false);
|
||||
List<Map<String, Object>> data = mapper.convertValue(rootNode.path("data"), List.class);
|
||||
|
||||
// 构建返回结果
|
||||
Map<String, Object> result = new HashMap<>();
|
||||
result.put("limit", resLimit);
|
||||
result.put("has_more", hasMore);
|
||||
result.put("data", data);
|
||||
|
||||
return success(result);
|
||||
}
|
||||
} catch (IOException e) {
|
||||
return error("获取会话列表失败: " + e.getMessage());
|
||||
}
|
||||
}
|
||||
|
||||
}
|
Reference in New Issue
Block a user