Request data type change to string on retry

[tomerparizer]

Hey

I see a weird behavior happening inside the retry mechanism
Once inside the retry phase the request body change to string instead of JSON
As you can see in the simple example below

const axios = require('axios');
const axiosRetry = require('axios-retry').default;

axios.interceptors.request.use((config) => {
  console.log('in interceptor', config.data, typeof config.data);
  return config;
});

axiosRetry(axios, { retries: 3, retryCondition: () => true });

async function main() {
  try {
    const body = {
      name: 'example',
    };

    const { data } = await axios.post('http://localhost:3030/return500', body);
    console.log('got data', data);
  } catch (e) {
    console.log('got an issue', e.message);
  }
}

main();

The outcome is:

in interceptor { name: 'example' } object
in interceptor {"name":"example"} string
in interceptor {"name":"example"} string
in interceptor {"name":"example"} string
got an issue Request failed with status code 500

Can you please help?

Thanks

[tomerparizer]

Hey
After checking a little in the axios side looks like it is how the axios response interceptor is getting the data

In the following code (that doesnt use axios-retry) you can see that the data is string instead of json

const axios = require('axios');

axios.interceptors.request.use((config) => {
  console.log('in req interceptor', config.data, typeof config.data);
  return config;
});

axios.interceptors.response.use(null, (error) => {
  console.log('in res interceptor', error.config.data, typeof error.config.data);
  throw error;
});

async function main() {
  try {
    const body = {
      name: 'example',
    };

    const { data } = await axios.post('http://localhost:3030/return500', body);
    console.log('got data', data);
  } catch (e) {
    console.log('got an issue', e.message);
  }
}

main();

The outcome is:

in req interceptor { name: 'example' } object
in res interceptor {"name":"example"} string
got an issue Request failed with status code 500

My guess is that the response interceptor is using the config after it was serialized to string and it is not being parsed again to json object