@mihanizm56/fetch-api

Solution for the isomorphic fetch

Documentation here

Benefits:

• Provides validation for responses (based on joi Schema validation and may use your own validation function)
• Provides the ability to make rest-api and json-rpc protocol requests in One interface
• Provides query-params serialize (booleans,strings,numbers,arrays of numbers or strings and variable serialize options for different backend services, https://www.npmjs.com/package/query-string is used)
• Provides cancel-request if the timeout is higher than timeout value (60 seconds by default)
• Provides error catching (you dont need to use try/catch)
• Provides the ability to match the exact error translation
• Provides different kinds of the response formats to parse
• Returns ALWAYS the hard prepared response structure (data, error, errorText, additionalErrors)
• Works in modern browsers and ie11
• Provides two main classes for REST API - RestRequest and PureRestReques.
  The difference is in the hard-structured response format
• Provides the ability to cancel the request by throwing the special event (ABORT_REQUEST_EVENT_NAME)
• Provides the ability to handle the response progress
• Provides the ability to select necessary fields from the response (https://github.com/nemtsov/json-mask#readme used)
• Provides the ability to use persistent params for all requests
• Provides the ability to retry requests
• Provides the ability to logging your error requests

Request input options:

• endpoint(string): the request url
• responseSchema: the response Schema that parsed by joi
  (you must use the joi in your project and insert the response Schema into this field)
• body(JSON | FormData): the request body
• mode('cors' | 'no-cors'): the cors type
• queryParams(object): the object with the query parameters (they will be serialized automatically)
• headers(object): the object with the headers
• translateFunction(function): function that will be called with error text key and params (key, params)
• isErrorTextStraightToOutput(boolean): flag not to prepare error text value - it
  goes straight from backend ("errorText" if REST and "message" if JSON-RPC)
• extraValidationCallback(function): callback that can be used for custom response
  data validation or if you don't want to use joi
• customTimeout(number) - milliseconds for cancel the request on timeout (or a full package of requests if the "retry" parameter is activated)
• retry - number of requests try to request if the response is negative

Request output options:

• error (boolean) - the flag of the response status
• errorText (string) - the text error message from the backend
• data (object) - the main data from the backend
• additionalErrors (object) - the additional error data from the backend
• code (number) - status-code from backend

Features and recommendations

• body will be serialized in JSON if body data NOT FormData

!!! Attention !!!

If you need to support ie11 - please add the following polyfills

import 'abortcontroller-polyfill/dist/polyfill-patch-fetch';
import 'whatwg-fetch';

installation

npm install @mihanizm56/fetch-api

Please, be careful. The response will be the object:

{
  error: boolean,
  data: Array<IResponse>,
  additionalErrors: null,
  errorText: string,
  code: number
}

The usage of the request api

const { error, errorText, data, additionalErrors } = await createItemsRequest(
  someData
);

Set persist options to all requests

import { ProxyController } from "@mihanizm56/fetch-api";

new ProxyController().setResponseTrackCallback(({
  requestParams, // all request parameters
  response, //  pure response protected object
  pureResponseData, // response body without formatting
  requestError: boolean, // is request crashed
  formattedResponseData // formatted response data in IResponse interface
}) => ({
 // do some metrics or logging here
}));

Set callback for metrics for all requests

import { ProxyController } from "@mihanizm56/fetch-api";

new ProxyController().setPersistentOptions(() => ({
  headers: {
    foo: 'bar',
  },
}));