debug(api): add diagnose-network endpoint

Author: zavxai

apps/api/src/feed/feed.controller.ts

@@ -21,4 +21,35 @@ export class FeedController {
     const user = req.user as User;
     return this.feedService.getDebugFeed(user.id);
   }
+
+  @Get('diagnose-network')
+  async diagnoseNetwork() {
+    const results: any = {};
+    const dns = require('dns/promises');
+    
+    try {
+      results.dns = await dns.lookup('api.openai.com', { all: true });
+    } catch (e: any) {
+      results.dns = { error: e.message };
+    }
+    
+    try {
+      const start = Date.now();
+      const res = await fetch('https://api.openai.com/v1/models', {
+        headers: {
+          'Authorization': `Bearer ${process.env.OPENAI_API_KEY}`,
+        }
+      });
+      results.fetch = {
+        status: res.status,
+        statusText: res.statusText,
+        duration: Date.now() - start,
+        body: (await res.text()).substring(0, 1000),
+      };
+    } catch (e: any) {
+      results.fetch = { error: e.message, stack: e.stack };
+    }
+    
+    return results;
+  }
 }