rest-api-handler/dist/DefaultResponseProcessor.js

Handler for REST APIs

'use strict';

/**
 * Processor provider that process response from API and throw custom Exception.
 */
class DefaultResponseProcessor {
  /**
   * Constructor.
   *
   * @param Exception - Exception class that will be throwed if request fails.
   * @param decoder - Define custom response body decoder.
   */
  constructor(Exception, decoder) {
    this.Exception = Exception;
    this.decoder = decoder || DefaultResponseProcessor.decodeResponse;
  }

  async processResponse(response, request) {
    const decodedResponse = await this.decoder(response);
    const toRespond = {
      data: decodedResponse,
      status: response.status,
      source: response,
      request
    };

    if (!response.ok) {
      throw new this.Exception(toRespond, request);
    }

    return toRespond;
  }

  static decodeResponse(response) {
    const contentType = response.headers.get('content-type'); // on default decode response as text

    if (!contentType) {
      return response.text();
    }

    if (contentType.includes('json')) {
      return response.json();
    }

    if (contentType.includes('text') || contentType.includes('xml')) {
      return response.text();
    }

    return response.blob();
  }

}

module.exports = DefaultResponseProcessor;