How to set authorization header coorectly? - react-native

Question

Problem:
In my react native app in order to remove repeated calls I have developed a general POST GET methods in httpClient file. It code is look likes this.
import axios from 'axios';
import AsyncStorage from '#react-native-community/async-storage';
axios.defaults.headers.post['Content-Type'] = 'application/json';
var instance = null;
const setAuthorisationHeder = async () => {
const token = JSON.parse(await AsyncStorage.getItem('auth_data'));
if (token) {
console.log('>>>>>> instance', instance);
Object.assign(instance.headers, {
Authorization: 'Bearer' + token.accessToken,
});
} else {
console.log('>>>>>> instance', instance);
Object.assign(instance.headers, {
Authorization: '',
});
}
};
export const setHeader = () => {
console.log('>>>>>>>> HIIII');
instance = axios.create({
baseURL: '',
timeout: 150000,
headers: {
'Content-Type': 'application/json',
},
});
instance.interceptors.response.use(
function (response) {
return response;
},
async function (error) {
if (error.response.status) {
if (error.response.status === 401) {
AsyncStorage.removeItem('auth_data');
} else {
throw error;
}
} else {
console.log(error);
}
},
);
};
export const Get = (route, data) => {
function getData() {
return instance.get(
route,
data == null ? {data: {}} : {data: JSON.stringify(data)},
);
}
if (instance) {
console.log('>>>>>> HIIIIii');
// setAuthorisationHeder();
return getData();
}
return setHeader().then(getData);
};
export const Post = (route, data) => {
console.log('>>>>>> route', route);
function postData() {
return instance.post(route, JSON.stringify(data));
}
if (instance) {
console.log('>>>>>> HIIIIii');
// setAuthorisationHeder();
// setAuthorisationHeder();
return postData();
}
return setHeader().then(postData);
};
Can some tell me a way to add an authorization header to this instance? My token is storing the Asyncstorage in the middle of some actions so at the beginning called I don't have the token. As my code setHeader is running only one time so I created a method call setAuthorisationHeder() function. But it is giving me can not find property .then error when I am putting a request. Can someone help me to solve this issue? Thank you?

Answer 1

you can define global headers once and use it in every network call.
https://github.com/axios/axios#global-axios-defaults

Answer 2

Create a global auth variable where you'll store the auth data from storage. Before making a request get the auth data and use interceptor to set the bearer token.
let authToken = '';
const getAuthToken = async () => {
// asumming auth token was saved as string
authToken = await AsyncStorage.getItem('auth_data');
};
Interceptor
// request interceptor
axiosInstance.interceptors.request.use(
function (config) {
// Do something before request is sent
config.headers.Authorization = `Bearer ${authToken}`;
return config;
},
function (error) {
// Do something with request error
return Promise.reject(error);
}
);
complete code
import axios from 'axios';
import AsyncStorage from '#react-native-community/async-storage';
let authToken = '';
const axiosInstance = axios.create({
baseURL: '',
timeout: 150000,
headers: {
'Content-Type': 'application/json',
},
});
// request interceptor
axiosInstance.interceptors.request.use(
function (config) {
// Do something before request is sent
config.headers.Authorization = `Bearer ${authToken}`;
return config;
},
function (error) {
// Do something with request error
return Promise.reject(error);
}
);
const getAuthToken = async () => {
// asumming auth token was saved as string
authToken = await AsyncStorage.getItem('auth_data');
};
export const Get = async (route, data = {}) => {
// get and set auth token
await getAuthToken();
// route = /user?id=787878 or /user/787878
return await axiosInstance.get(route);
};
export const Post = async (route, data = {}) => {
await getAuthToken();
return await axiosInstance.post(route, data);
};