parse JSON at the end of the stream and use status code from the response

Signed-off-by: NunoMCP <NunoMCP@users.noreply.github.com>

Author: NunoMCP

apps/site/pages/en/learn/getting-started/fetch.md

@@ -134,13 +134,12 @@ try {
 
 ```js
 import { Writable } from 'stream';
-
 import { stream } from 'undici';
 
 async function fetchGitHubRepos() {
   const url = 'https://api.github.com/users/nodejs/repos';
 
-  const { statusCode } = await stream(
+  await stream(
     url,
     {
       method: 'GET',
@@ -149,35 +148,30 @@ async function fetchGitHubRepos() {
         Accept: 'application/json',
       },
     },
-    () => {
+    (res) => {
       let buffer = '';
 
       return new Writable({
         write(chunk, encoding, callback) {
           buffer += chunk.toString();
-
+          callback();
+        },
+        final(callback) {
           try {
             const json = JSON.parse(buffer);
             console.log(
               'Repository Names:',
               json.map(repo => repo.name)
             );
-            buffer = '';
           } catch (error) {
             console.error('Error parsing JSON:', error);
           }
-
-          callback();
-        },
-        final(callback) {
-          console.log('Stream processing completed.');
+          console.log(`Response status: ${res.statusCode}`);
           callback();
         },
       });
     }
   );
-
-  console.log(`Response status: ${statusCode}`);
 }
 
 fetchGitHubRepos().catch(console.error);