chore: drop old client support (#14369)

packages/backend/server/src/plugins/copilot/providers/openai.ts

@@ -24,7 +24,9 @@ import {
   CopilotPromptInvalid,
   CopilotProviderNotSupported,
   CopilotProviderSideError,
+  fetchBuffer,
   metrics,
+  OneMB,
   UserFriendlyError,
 } from '../../../base';
 import { CopilotProvider } from './provider';
@@ -673,14 +675,12 @@ export class OpenAIProvider extends CopilotProvider<OpenAIConfig> {
 
     for (const [idx, entry] of attachments.entries()) {
       const url = typeof entry === 'string' ? entry : entry.attachment;
-      const resp = await fetch(url);
-      if (resp.ok) {
-        const type = resp.headers.get('content-type');
-        if (type && type.startsWith('image/')) {
-          const buffer = new Uint8Array(await resp.arrayBuffer());
-          const file = new File([buffer], `${idx}.png`, { type });
-          form.append('image[]', file);
-        }
+      try {
+        const { buffer, type } = await fetchBuffer(url, 10 * OneMB, 'image/');
+        const file = new File([buffer], `${idx}.png`, { type });
+        form.append('image[]', file);
+      } catch {
+        continue;
       }
     }