francishero / nestjs-http-promise

promise implementation of nestjs http module with retries feature using axios-retry and axios

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nestjs-http-promise

npm version

description

nestjs module that just doing little modification to the original and good nestjs http module.

features

  • axios - the most used package for http requests in npm.
  • promise based - most of us using the current http module that uses observable which we don't use most of the time and in order to avoid it were just calling .toPromise() every http call.
  • retries - in many cases we will want to retry a failing http call. with observable we could just add the retry operator (rxjs) but with promises we need to implement this logic ourselves. this package will make it easy for you, just pass { retries: NUMBER_OF_RETRIES } in the config of the http module. more details in the configuration section

quick start

installing

Using npm:

$ npm install nestjs-http-promise

Using yarn:

$ yarn add nestjs-http-promise

usage - just like every nest.js module

import the module:

import { HttpModule } from 'nestjs-http-promise'

@Module({ 
  imports: [HttpModule]
})

inject the service in the class:

import { HttpService } from 'nestjs-http-promise'

class Demo {
    constructor(private readonly httpService: HttpService) {}
}

use the service:

public callSomeServer(): Promise<object> {
  return this.httpService.get('http://fakeService') 
}

configuration

the service uses axios and axios-retry, so you can pass any AxiosRequestConfig And/Or AxiosRetryConfig

just pass it in the .register() method as you would do in the original nestjs httpModule

import { HttpModule } from 'nestjs-http-promise'

@Module({
  imports: [HttpModule.register(
    {
      timeout: 1000,
      retries: 5,
        ...
    }
  )]
})

default configuration

just the default config of axios-retry : https://github.com/softonic/axios-retry#options

async configuration

When you need to pass module options asynchronously instead of statically, use the registerAsync() method just like in nest httpModule.

you have a couple of techniques to do it:

  • with the useFactory
HttpModule.registerAsync({
    useFactory: () => ({
    timeout: 1000,
    retries: 5,
      ...
    }),
});
  • using class
HttpModule.registerAsync({
  useClass: HttpConfigService,
});

Note that in this example, the HttpConfigService has to implement HttpModuleOptionsFactory interface as shown below.

@Injectable()
class HttpConfigService implements HttpModuleOptionsFactory {
  async createHttpOptions(): Promise<HttpModuleOptions> {
    const configurationData = await someAsyncMethod();
    return {
      timeout: configurationData.timeout,
      retries: 5,
        ...
    };
  }
}

If you want to reuse an existing options provider instead of creating a copy inside the HttpModule, use the useExisting syntax.

HttpModule.registerAsync({
  imports: [ConfigModule],
  useExisting: ConfigService,
});
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promise implementation of nestjs http module with retries feature using axios-retry and axios

License:MIT License


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