Axios request fails when setting maxRedirects to 0

[JeremyFunk]

What version of Bun is running?

1.0.0

What platform is your computer?

Darwin 22.4.0 arm64 arm

What steps can reproduce the bug?

Execute this code:

• For Bun run bun index.ts
• For Node run node.index.ts

Then, change maxRedirects to 1 and repeat.

import axios from 'axios'

let isResolved = false
;(async () => {
  try {
    return await axios.get('https://example.com', { maxRedirects: 0 })
  } catch {
    return 'error'
  }
})().then(_ => (isResolved = true))

setInterval(() => {
  if (isResolved) {
    console.log('resolved')
    process.exit(0)
  } else {
    console.log('not resolved')
  }
}, 1000)

What is the expected behavior?

NodeJS and Bun should behave the same way. That is, if maxRedirects is set to 0, the request should not silently stall.

What do you see instead?

Bun and Node are behaving the same way when running with maxRedirects >=1. At maxRedirects = 0 NodeJS can execute the code with no issue while Bun silently stalls (infinitely waits for the promise to be resolved).

Additional information

I tested with multiple axios versions. The snippet above was written with version 1.5.0

[seanwessmith]

@JeremyFunk this runs on Bun@1.0.1

[Hanaasagi]

This issue can be reproduced in 1.0.3. I see that when maxRedirects is set to 0, it uses node:http as the transport. That is the difference.

https://github.com/axios/axios/blob/4c89f25196525e90a6e75eda9cb31ae0a2e18acd/lib/adapters/http.js#L409-L424

The following code will hang in bun

import axios from "axios";
import http from "node:http";

const resp = await axios.get("http://example.com", { transport: http });
console.log(resp.data);

Env

• bun 1.0.3+9d5459221ff663b6c0058440167e098886d97cc2
• axios 1.5.0
• follow-redirects: 1.15.3

---

Update:

After some debugging,

https://github.com/axios/axios/blob/4c89f25196525e90a6e75eda9cb31ae0a2e18acd/lib/adapters/http.js#L439

I found req.destroyed is true in bun but false in nodejs.

import http from "node:http";

const req = http.request("http://example.com", (res) => {
  console.log("req.destroyed", req.destroyed);
  res.on("data", (data) => {
    // console.log(`Received response: ${data}`);
  });

  res.on("end", () => {
    // console.log("Request finished.");
  });
});

req.end();

[nektro]

does this still reproduce for you? it appears to be working on my end in Bun 1.1.10 (you may need to run bun upgrade)

many axios fixes made it into Bun 1.1.8# and Bun 1.1.9#.

[seanwessmith]

sweet, axios and this test case as well work now!