Implementing Retry Functionality with Axios in NestJS

Question

Implementing Retry Functionality with Axios in NestJS

I am integrating a third-party API into my NestJS application to retrieve data and perform certain operations. Occasionally, the API throws a 400 Bad Request error, in which case I need to retry the call after a waiting period of 1 second. What is the best and most efficient way to handle this scenario?

service.ts

async fetchData() {
  try {
    const response = await axios.get('my-api-irl')
    // .. performing some data manipulation with the response
  } catch (error) {
    // Need to implement retry logic for error status code 400
  }
}

javascript typescript axios nestjs

Answer 1

Answer №1

Suppose you need to handle retrying an Axios call in your NestJS application upon encountering a 400 Bad Request error. You can make use of the nestjs-axios-retry package that has been developed specifically for this purpose. This package offers a seamless and effective approach to incorporating retry logic into your HTTP requests. Here's how you can implement it in your particular situation:

Start by installing the nestjs-axios-retry and axios-retry packages:

npm install nestjs-axios-retry axios-retry

Next, configure the AxiosRetryModule within your NestJS module - within your AppModule (or any applicable module), import and set up the AxiosRetryModule as shown below:

import { Module } from '@nestjs/common';
import { AxiosRetryModule } from 'nestjs-axios-retry';
import axiosRetry from 'axios-retry';

@Module({
  imports: [
    AxiosRetryModule.forRoot({
      axiosRetryConfig: {
        retries: 3, // Number of retry attempts
        retryDelay: (retryCount) => 1000, // Fixed 1 second delay between retries
        retryCondition: (error) => error.response.status === 400, // Retry only on 400 Bad Request
      },
    }),
  ],
  // ... Other configurations
})
export class AppModule {}

Utilize the HttpService in your service - inject the HttpService offered by NestJS into your service. The retry functionality will now be automatically applied based on your module configuration:

import { Injectable } from '@nestjs/common';
import { HttpService } from '@nestjs/axios';
import { firstValueFrom } from 'rxjs';

@Injectable()
export class AppService {
  constructor(private httpService: HttpService) {}

  async fetchData() {
    try {
      const response = await firstValueFrom(
        this.httpService.get('your-api-url'),
      );
      // ... do something with the response
      return response.data;
    } catch (error) {
      // Handle the case where all retries fail
      throw error;
    }
  }
}

async fetchDataWithExponentialBackoff() {
  const response = await firstValueFrom(
    this.httpService.get('https://example.com/data', {
      'axios-retry': {
        retries: 3,
        retryDelay: axiosRetry.exponentialDelay,
      },
    }),
  );
  return response.data;
}

async fetchDataWithOnRetryCallback() {
  const response = await firstValueFrom(
    this.httpService.get('https://example.com/data', {
      'axios-retry': {
        retries: 3,
        onRetry: (retryCount, error, requestConfig) => {
          console.log(`Retrying request attempt ${retryCount}`);
        },
      },
    }),
  );
  return response.data;
}

// Additional fetch data methods...

Answer 2

Suppose you need to handle retrying an Axios call in your NestJS application upon encountering a 400 Bad Request error. You can make use of the nestjs-axios-retry package that has been developed specifically for this purpose. This package offers a seamless and effective approach to incorporating retry logic into your HTTP requests. Here's how you can implement it in your particular situation:

Start by installing the nestjs-axios-retry and axios-retry packages:

npm install nestjs-axios-retry axios-retry

Next, configure the AxiosRetryModule within your NestJS module - within your AppModule (or any applicable module), import and set up the AxiosRetryModule as shown below:

import { Module } from '@nestjs/common';
import { AxiosRetryModule } from 'nestjs-axios-retry';
import axiosRetry from 'axios-retry';

@Module({
  imports: [
    AxiosRetryModule.forRoot({
      axiosRetryConfig: {
        retries: 3, // Number of retry attempts
        retryDelay: (retryCount) => 1000, // Fixed 1 second delay between retries
        retryCondition: (error) => error.response.status === 400, // Retry only on 400 Bad Request
      },
    }),
  ],
  // ... Other configurations
})
export class AppModule {}

Utilize the HttpService in your service - inject the HttpService offered by NestJS into your service. The retry functionality will now be automatically applied based on your module configuration:

import { Injectable } from '@nestjs/common';
import { HttpService } from '@nestjs/axios';
import { firstValueFrom } from 'rxjs';

@Injectable()
export class AppService {
  constructor(private httpService: HttpService) {}

  async fetchData() {
    try {
      const response = await firstValueFrom(
        this.httpService.get('your-api-url'),
      );
      // ... do something with the response
      return response.data;
    } catch (error) {
      // Handle the case where all retries fail
      throw error;
    }
  }
}

async fetchDataWithExponentialBackoff() {
  const response = await firstValueFrom(
    this.httpService.get('https://example.com/data', {
      'axios-retry': {
        retries: 3,
        retryDelay: axiosRetry.exponentialDelay,
      },
    }),
  );
  return response.data;
}

async fetchDataWithOnRetryCallback() {
  const response = await firstValueFrom(
    this.httpService.get('https://example.com/data', {
      'axios-retry': {
        retries: 3,
        onRetry: (retryCount, error, requestConfig) => {
          console.log(`Retrying request attempt ${retryCount}`);
        },
      },
    }),
  );
  return response.data;
}

// Additional fetch data methods...

Answer 3

Answer №2

If you're looking for a solution that handles retry logic, I recommend checking out the library I recently published. Specifically, if you only want to retry on a 400 error, you can achieve it by implementing the following code snippet:

import withRetry from "@teneff/with-retry/decorator";
import axios, { AxiosError } from "axios";

class ErrorOnWhichWeShouldRetry extends Error {
  constructor(readonly cause?: Error) {
    super();
  }
}

export class Something {
  @withRetry({
    errors: [ErrorOnWhichWeShouldRetry],
    maxCalls: 5,
    delay: 1000,
  })
  async fetchData() {
    try {
      const response = await axios.get("my-api-irl");
      return handleResponse(response);
    } catch (err) {
      if (isAxiosError(err) && err.code === '400') {
        throw new ErrorOnWhichWeShouldRetry(err);
      }
      throw err
    }
  }
}

const isAxiosError = (err: unknown): err is AxiosError => {
  return err instanceof Error && "code" in err;
};

Answer 4

If you're looking for a solution that handles retry logic, I recommend checking out the library I recently published. Specifically, if you only want to retry on a 400 error, you can achieve it by implementing the following code snippet:

import withRetry from "@teneff/with-retry/decorator";
import axios, { AxiosError } from "axios";

class ErrorOnWhichWeShouldRetry extends Error {
  constructor(readonly cause?: Error) {
    super();
  }
}

export class Something {
  @withRetry({
    errors: [ErrorOnWhichWeShouldRetry],
    maxCalls: 5,
    delay: 1000,
  })
  async fetchData() {
    try {
      const response = await axios.get("my-api-irl");
      return handleResponse(response);
    } catch (err) {
      if (isAxiosError(err) && err.code === '400') {
        throw new ErrorOnWhichWeShouldRetry(err);
      }
      throw err
    }
  }
}

const isAxiosError = (err: unknown): err is AxiosError => {
  return err instanceof Error && "code" in err;
};

Implementing Retry Functionality with Axios in NestJS

Answer №1

Answer №2

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