feat: add websocket search

src/app/api/search/ws/route.ts

@@ -0,0 +1,182 @@
+/* eslint-disable @typescript-eslint/no-explicit-any,no-console */
+
+import { NextRequest } from 'next/server';
+
+import { getConfig } from '@/lib/config';
+import { searchFromApi } from '@/lib/downstream';
+import { yellowWords } from '@/lib/yellow';
+
+export const runtime = 'edge';
+
+export async function GET(request: NextRequest) {
+  const { searchParams } = new URL(request.url);
+  const query = searchParams.get('q');
+
+  if (!query) {
+    return new Response(
+      JSON.stringify({ error: '搜索关键词不能为空' }),
+      {
+        status: 400,
+        headers: {
+          'Content-Type': 'application/json',
+        },
+      }
+    );
+  }
+
+  const config = await getConfig();
+  const apiSites = config.SourceConfig.filter((site) => !site.disabled);
+
+  // 共享状态
+  let streamClosed = false;
+
+  // 创建可读流
+  const stream = new ReadableStream({
+    async start(controller) {
+      const encoder = new TextEncoder();
+
+      // 辅助函数：安全地向控制器写入数据
+      const safeEnqueue = (data: Uint8Array) => {
+        try {
+          if (streamClosed || (!controller.desiredSize && controller.desiredSize !== 0)) {
+            // 流已标记为关闭或控制器已关闭
+            return false;
+          }
+          controller.enqueue(data);
+          return true;
+        } catch (error) {
+          // 控制器已关闭或出现其他错误
+          console.warn('Failed to enqueue data:', error);
+          streamClosed = true;
+          return false;
+        }
+      };
+
+      // 发送开始事件
+      const startEvent = `data: ${JSON.stringify({
+        type: 'start',
+        query,
+        totalSources: apiSites.length,
+        timestamp: Date.now()
+      })}\n\n`;
+
+      if (!safeEnqueue(encoder.encode(startEvent))) {
+        return; // 连接已关闭，提前退出
+      }
+
+      // 记录已完成的源数量
+      let completedSources = 0;
+      let allResults: any[] = [];
+
+      // 为每个源创建搜索 Promise
+      const searchPromises = apiSites.map(async (site, index) => {
+        try {
+          // 添加超时控制
+          const searchPromise = Promise.race([
+            searchFromApi(site, query),
+            new Promise((_, reject) =>
+              setTimeout(() => reject(new Error(`${site.name} timeout`)), 10000)
+            ),
+          ]);
+
+          const results = await searchPromise as any[];
+
+          // 过滤黄色内容
+          let filteredResults = results;
+          if (!config.SiteConfig.DisableYellowFilter) {
+            filteredResults = results.filter((result) => {
+              const typeName = result.type_name || '';
+              return !yellowWords.some((word: string) => typeName.includes(word));
+            });
+          }
+
+          // 发送该源的搜索结果
+          completedSources++;
+
+          if (!streamClosed) {
+            const sourceEvent = `data: ${JSON.stringify({
+              type: 'source_result',
+              source: site.key,
+              sourceName: site.name,
+              results: filteredResults,
+              timestamp: Date.now()
+            })}\n\n`;
+
+            if (!safeEnqueue(encoder.encode(sourceEvent))) {
+              streamClosed = true;
+              return; // 连接已关闭，停止处理
+            }
+          }
+
+          if (filteredResults.length > 0) {
+            allResults.push(...filteredResults);
+          }
+
+        } catch (error) {
+          console.warn(`搜索失败 ${site.name}:`, error);
+
+          // 发送源错误事件
+          completedSources++;
+
+          if (!streamClosed) {
+            const errorEvent = `data: ${JSON.stringify({
+              type: 'source_error',
+              source: site.key,
+              sourceName: site.name,
+              error: error instanceof Error ? error.message : '搜索失败',
+              timestamp: Date.now()
+            })}\n\n`;
+
+            if (!safeEnqueue(encoder.encode(errorEvent))) {
+              streamClosed = true;
+              return; // 连接已关闭，停止处理
+            }
+          }
+        }
+
+        // 检查是否所有源都已完成
+        if (completedSources === apiSites.length) {
+          if (!streamClosed) {
+            // 发送最终完成事件
+            const completeEvent = `data: ${JSON.stringify({
+              type: 'complete',
+              totalResults: allResults.length,
+              completedSources,
+              timestamp: Date.now()
+            })}\n\n`;
+
+            if (safeEnqueue(encoder.encode(completeEvent))) {
+              // 只有在成功发送完成事件后才关闭流
+              try {
+                controller.close();
+              } catch (error) {
+                console.warn('Failed to close controller:', error);
+              }
+            }
+          }
+        }
+      });
+
+      // 等待所有搜索完成
+      await Promise.allSettled(searchPromises);
+    },
+
+    cancel() {
+      // 客户端断开连接时，标记流已关闭
+      streamClosed = true;
+      console.log('Client disconnected, cancelling search stream');
+    },
+  });
+
+  // 返回流式响应
+  return new Response(stream, {
+    headers: {
+      'Content-Type': 'text/event-stream',
+      'Cache-Control': 'no-cache',
+      'Connection': 'keep-alive',
+      'Access-Control-Allow-Origin': '*',
+      'Access-Control-Allow-Methods': 'GET',
+      'Access-Control-Allow-Headers': 'Content-Type',
+    },
+  });
+}