vjudge: fix set-cookie

packages/vjudge/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@hydrooj/vjudge",
-    "version": "1.0.0",
+    "version": "1.0.1",
     "description": "Submit problems to remote oj",
     "main": "package.json",
     "repository": "https://github.com/hydro-dev/Hydro.git",

packages/vjudge/src/providers/codeforces.ts

@@ -56,7 +56,11 @@ export default class CodeforcesProvider implements IBasicProvider {
     }
 
     async getCsrfToken(url: string) {
-        const { text: html } = await this.get(url);
+        const { text: html, header } = await this.get(url);
+        if (header['set-cookie']) {
+            await this.save({ cookie: header['set-cookie'] });
+            this.cookie = header['set-cookie'];
+        }
         const $dom = new JSDOM(html);
         return $dom.window.document.querySelector('meta[name="X-Csrf-Token"]').getAttribute('content');
     }