add

functions/api/chat.ts

@@ -0,0 +1,60 @@
+import OpenAI from 'openai';
+
+export async function onRequestPost({ env, request }) {
+  try {
+    const { message } = await request.json();
+    const apiKey = env.DASHSCOPE_API_KEY;
+
+    if (!apiKey) {
+      throw new Error('API密钥未配置');
+    }
+
+    const openai = new OpenAI({
+      apiKey: apiKey,
+      baseURL: "https://dashscope.aliyuncs.com/compatible-mode/v1"
+    });
+
+    // 使用流式响应
+    const stream = await openai.chat.completions.create({
+      model: "qwen-plus",
+      messages: [
+        { role: "system", content: "You are a helpful assistant." },
+        { role: "user", content: message }
+      ],
+      stream: true, // 启用流式响应
+    });
+
+    // 创建 ReadableStream
+    const readable = new ReadableStream({
+      async start(controller) {
+        try {
+          for await (const chunk of stream) {
+            const content = chunk.choices[0]?.delta?.content || '';
+            if (content) {
+              // 发送数据块
+              controller.enqueue(new TextEncoder().encode(`data: ${JSON.stringify({ content })}\n\n`));
+            }
+          }
+          controller.close();
+        } catch (error) {
+          controller.error(error);
+        }
+      },
+    });
+
+    // 返回 SSE 流
+    return new Response(readable, {
+      headers: {
+        'Content-Type': 'text/event-stream',
+        'Cache-Control': 'no-cache',
+        'Connection': 'keep-alive',
+      },
+    });
+
+  } catch (error) {
+    return Response.json(
+      { error: error.message },
+      { status: 500 }
+    );
+  }
+}