🎉 first commit

app/routes/api.chat/mock-chat.server.ts

@@ -0,0 +1,61 @@
+import type { ActionFunctionArgs } from '@remix-run/node';
+import { generateId } from 'ai';
+import { readFile } from 'fs/promises';
+import { join } from 'path';
+import { createScopedLogger } from '~/lib/.server/logger';
+
+const logger = createScopedLogger('api.chat.mock-chat');
+
+/**
+ * 处理 mock 数据的流式输出，通常用于开发环境下使用。
+ */
+export async function mockChat(_args: ActionFunctionArgs, filePath: string = 'mock_stream_text_1.txt') {
+  try {
+    const id = generateId();
+    // 读取 mock 数据文件
+    const mockFilePath = join(process.cwd(), 'mock', filePath);
+    const fileContent = await readFile(mockFilePath, 'utf-8');
+    const lines = fileContent.split('\n').map((line) => {
+      // 替换 messageId 为生成 id，data: {"type":"start","messageId":"uoLyIATGAm28y7rP"}
+      if (line.includes('messageId')) {
+        const startData = JSON.parse(line.replace('data: ', ''));
+        startData.messageId = id;
+        return `data: ${JSON.stringify(startData)}`;
+      }
+      return line;
+    });
+
+    // 创建一个 ReadableStream 来按行输出内容
+    const encoder = new TextEncoder();
+    const stream = new ReadableStream({
+      async start(controller) {
+        // 按行输出内容，每行之间添加延迟
+        for (const line of lines) {
+          if (line.trim() !== '') {
+            controller.enqueue(encoder.encode(`${line}\n\n`));
+            // 添加小延迟，模拟真实的流式输出
+            await new Promise((resolve) => setTimeout(resolve, 10));
+          }
+        }
+        controller.close();
+      },
+    });
+
+    // 返回 Response 对象
+    return new Response(stream, {
+      status: 200,
+      headers: {
+        'Content-Type': 'text/event-stream; charset=utf-8',
+        Connection: 'keep-alive',
+        'Cache-Control': 'no-cache, no-transform',
+        'X-Accel-Buffering': 'no',
+      },
+    });
+  } catch (error: any) {
+    logger.error(`Mock 数据流式输出错误: ${error}`);
+    throw new Response(`Mock 数据流式输出错误: ${error.message}`, {
+      status: 500,
+      statusText: 'Internal Server Error',
+    });
+  }
+}