Example of using request retry

example-request-retry.js

// without request retry
async fetchHttpMediaBufferArray(imageUrl) {
  try {
    // your request code
     const bufferResp = await firstValueFrom(
      this.httpService.get(imageUrl, { responseType: 'arraybuffer' }),
    );

    const contentType = bufferResp.headers['content-type'];
    const buffer = Buffer.from(bufferResp.data);

    return { buffer, contentType };
  } catch (err) {
    // do something with the err i.e.
    console.log(err);
  }
}

// with request retry
async fetchHttpMediaBufferArray(imageUrl) {
  // just wrap your code in the method 
  // and pass error handling code as second parameter
  return requestWithRetry(
    async () => {  // your request code 
      const bufferResp = await firstValueFrom(
        this.httpService.get(imageUrl, { responseType: 'arraybuffer' }),
      );

      const contentType = bufferResp.headers['content-type'];
      const buffer = Buffer.from(bufferResp.data);

      return { buffer, contentType };
    },
    err => {  // your error handling code as 2nd parameter
      console.log(err);
    },
    5 // optional, number of retries before it finally fails and executes your error handler code
  );
}