Unexpected end of JSON input in my Deno HTTP server code - deno

Question

I'm actually dealing with some issues.
In fact I'm coding an HTTP server with Deno and I have the same problem that I did with Node.js.
I use Postman to simulate POST request to my server.
When I do a Request with the URL of my localhost the server is working:
The deno server code :
const listener = Deno.listen({ port: 8000 });
console.log(`Server is running on http://localhost:8000`);
for await (const conn of listener) {
handleNewConnection(conn);
}
async function handleNewConnection(conn: Deno.Conn) {
for await (const req of Deno.serveHttp(conn)) {
await handleRequest(req.request, req.respondWith);
}
}
async function handleRequest(req: Request, resp: any) {
if (req.method === "POST") {
let body = await req.json();
console.log(body);
resp(new Response(null));
} else {
console.log(req.method)
resp(new Response(null));
}
}
The request that I'm sending in localhost:8000:
What I receive in console.log :
{
name: "Molecule Man",
age: 29,
secretIdentity: "Dan Jukes",
powers: [ "Radiation resistance", "Turning tiny", "Radiation blast" ]
}
Then I'm gonna show you when I use a Cloudflare tunnel.
This Cloudflare tunnel is directly sending the requests to my server on port 8000.
The POST request that I'm sending :
What I receive with the console.log() :
error: Uncaught (in promise) SyntaxError: Unexpected end of JSON input
let body = await req.json();
^
at parse (<anonymous>)
at packageData (deno:ext/fetch/22_body.js:328:16)
at Request.json (deno:ext/fetch/22_body.js:267:18)
at async handleRequest (file:///C:/Users/Utilisateur/Projets/poc-pdu/HTTP-serv-deno/http-serv-deno.ts:17:16)
at async handleNewConnection (file:///C:/Users/Utilisateur/Projets/poc-pdu/HTTP-serv-deno/http-serv-deno.ts:10:5)
That's the error, in my opinion, this is due to the time it takes for the request to arrive at it's destination.
I thank all the people who will take the time to respond to this post.
Bye!