# Stuck trying to parse api version
**URL:** https://forum.codecrafters.io/t/stuck-trying-to-parse-api-version/8923
**Category:** Challenges
**Tags:** challenge:kafka
**Created:** [April 18, 2025, 2:06am UTC](https://forum.codecrafters.io/t/stuck-trying-to-parse-api-version/8923 "2025-04-18T02:06:21Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@malawarecreator](https://forum.codecrafters.io/u/malawarecreator)
#### Post date: [April 18, 2025, 2:06am UTC](https://forum.codecrafters.io/t/stuck-trying-to-parse-api-version/8923/1 "2025-04-18T02:06:21Z")
```rs
#![allow(unused_imports)]
use std::{io::{Cursor, Read, Write}, net::TcpListener};
use tokio::io::AsyncReadExt;
#[tokio::main(flavor = "current_thread")]
async fn main() {
println!("Logs from your program will appear here!");
let listener = TcpListener::bind("127.0.0.1:9092").unwrap();
for stream in listener.incoming() {
match stream {
Ok(mut _stream) => {
println!("accepted new connection");
let mut buf = [0_u8; 4];
_stream.read_exact(&mut buf).unwrap();
let mut rdr = Cursor::new(buf);
let len = rdr.read_u32().await.unwrap();
let mut msg = vec![0u8; len.try_into().unwrap()];
_stream.read_exact(&mut msg.as_mut_slice()).unwrap();
let mut rdr = Cursor::new(msg);
rdr.read_u16().await.unwrap();
let version = rdr.read_u16().await.unwrap();
let cid = rdr.read_u32().await.unwrap();
let acceptable_range = 0..4;
if acceptable_range.contains(&version) {
_stream.write_all([0, 0, 0, 4].as_slice()).unwrap();
_stream.write_all(&cid.to_be_bytes()).unwrap();
} else {
let errorcode: i32 = 35;
_stream.write_all([0, 0, 0, 4].as_slice()).unwrap();
_stream.write_all(&cid.to_be_bytes()).unwrap();
_stream.write_all(&errorcode.to_be_bytes()).unwrap();
}
}
Err(e) => {
println!("error: {}", e);
}
}
}
}
```
this is my code
it says expected error 35 got 0
---
### Author:  [@andy1li](https://forum.codecrafters.io/u/andy1li)
#### Post date: [April 18, 2025, 2:07am UTC](https://forum.codecrafters.io/t/stuck-trying-to-parse-api-version/8923/3 "2025-04-18T02:07:29Z")
Hey @malawarecreator, could you [upload your code to GitHub](https://docs.codecrafters.io/features/publish-to-github) and share the link? It will be much easier to debug if I can run it directly.
---
### Author:  [@andy1li](https://forum.codecrafters.io/u/andy1li)
#### Post date: [April 28, 2025, 12:46pm UTC](https://forum.codecrafters.io/t/stuck-trying-to-parse-api-version/8923/4 "2025-04-28T12:46:42Z")
Closing this thread due to inactivity. If you still need assistance, feel free to reopen or start a new discussion!
---
### Author:  [@system](https://forum.codecrafters.io/u/system)
#### Post date: [May 3, 2025, 12:46pm UTC](https://forum.codecrafters.io/t/stuck-trying-to-parse-api-version/8923/5 "2025-05-03T12:46:57Z")
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