Intercept Promise error with vue-resource - vue.js

I'd like to intercept all api responses with the code != 200 in my main.js with the following code, dispatch an action and after that, show a toast showing the error message. I'm using vue-resource and my interceptor is the following:
Vue.http.interceptors.push(function(request, next) {
next(function(response) {
debugger;
if (response.status != 200) {
store.dispatch("errorAction", response);
}
});
});
But the code inside the callback is never reached...
And my api call is done this way. The java controller just throws an exception with the 500 error code.
Vue.http
.get(`http://${ADDRESS}/${store.state.module}/foo/exception`)
.then(() => {}, () => {});
I'm new with Promises and probably i'm messing things, but i don't want to be passing an error callback to every single promise. And what if my request is as follows:
export function getFoo(cb) {
Vue.http
.get(`http://${ADDRESS}/${store.state.module}/foo`)
.then(
response => {
return response.json();
},
() => {}
)
.then(foos => {
cb(foos);
});
}
I would like to get rid off () => {} and use the interceptor code to be run.

I think I'd had the same issue, so I tried to look at the documentation. Well, it is very simple, you just need to do something like this:
In main.js
Vue.http.interceptors.push(function(req) {
//Here you can add some headers, if needed
req.headers.set('awesomeHeader', 'owwnt')
return function(res) {
if( res.status == 200 || res.status == 201 || res.status == 202 ){ //Here you add the status codes that you'll work with, just like my example
//Sucess response
} else {
//Every time witch an request return a status differ form the list above, you can do whatever you want, for example you can redirect the page for a new one
window.location.href = `http://localhost:8080/#`
//If you want to display a notification, you need to import the component before, and then do something like it:
Notification.success({
title: 'error',
message: 'Unauthorized request!',
offset: 100
})
}
};
})
Does it answer you question? I hope it does.

Related

What are the best practices for handling vuex errors?

I'm new to vue. I use interceptors for handling action responses, all easy with successful responses. But I would like to know what are the best practice to handle error responses.
I want to show a toastr with error message from response by default if there's no catch block in the action, but if there is a catch, do only catch function with no toastr shown.
Also, is it ok to handle unauthorized response making a redirect to login page directly in interceptor and what advices can be given about it?
My current interceptor looks like this:
axios.interceptors.response.use(
(response) => {
return response.data.data;
},
(error: AxiosError) => {
const data = error.response?.data;
const code = data?.code;
if (code === ErrorCodes.NEED_EMAIL_CONFIRMATION) {
router.push("email-verification").then();
} else if (code === ErrorCodes.UNAUTHORIZED) {
router.push("sign-in").then();
} else {
if (undefined !== data.error) {
toaster.error(data.error);
} else {
toaster.error(i18n.t("unexpected"));
}
}
return error;
}
);
but I don't like too many responsibilities here and I don't know how to avoid toastr show when the action has a catch function
You can control error toast notification from where you send the request, by sending an extra config.
Using axios:
axios.post('/api-name', data, {
config: {
showToast: true,
},
})
and then on axios intercept:
axios.interceptors.response.use(
response => {...},
error => {
const showTost= error.config.errorToast
if(showToast){
// show toast you can pass custom message too...<3
}
}

ASync/Await is not working as expected in router.BeforeEach guard in vue?

this is my router guard :
router.beforeEach(async (to,from,next)=>{
await store.dispatch('GetPermission');
if(to.matched.some(record => record.meta.requireAuth)){
let permissions=store.state.permissions; //getting empty
console.log(permissions);
if(permissions.filter(per => (per.name === 'read_list').length!=0)){
next({
path:'/dashboard/create'
})
}
else{
next()
}
}
// else if(to.matched.some(record => record.meta.requireAuth)){
// if(store.token!=null){
// next({
// path:'/dashboard'
// })
// }
// else{
// next()
// }
// }
else{
next()
}
});
problem is here though i m using await in dispatch method , i m not getting state value of permissions which is initially empty
here is vuex store code :
GetPermission(context){
axios.defaults.headers.common['Authorization']='Bearer ' + context.state.token
axios.get('http://127.0.0.1:8000/api/user').then((response)=>{
console.log(response)
context.commit('Permissions',response.data.permission)
})
//mutation:
Permissions(state,payload){
state.permissions=payload
}
//state
state:{
error:'',
token:localStorage.getItem('token') || null,
permissions:'',
success:'',
isLoggedin:'',
LoggedUser:{}
}
help me to solve it please ??
actions in Vuex are asynchronous. The only way to let the calling function (initiator of action) to know that an action is complete - is by returning a Promise and resolving it later.
Here is an example: myAction returns a Promise, makes a http call and resolves or rejects the Promise later - all asynchronously
actions: {
myAction(context, data) {
return new Promise((resolve, reject) => {
// Do something here... lets say, a http call using vue-resource
this.$http("/api/something").then(response => {
// http success, call the mutator and change something in state
resolve(response); // Let the calling function know that http is done. You may send some data back
}, error => {
// http failed, let the calling function know that action did not work out
reject(error);
})
})
}
}
Now, when your Vue component initiates myAction, it will get this Promise object and can know whether it succeeded or not. Here is some sample code for the Vue component:
export default {
mounted: function() {
// This component just got created. Lets fetch some data here using an action
this.$store.dispatch("myAction").then(response => {
console.log("Got some data, now lets show something in this component")
}, error => {
console.error("Got nothing from server. Prompt user to check internet connection and try again")
})
}
}
Also,you are calling same route when no permission match, in that case it always call your same route and make infinite loop.
Redirect to access denied page if permission denied.

Error handling with axios method in vuejs

If getting response like this-
data: Array(0)
length: 0
How to handling the error and how to show message the no matching data found in vuejs.
First of all, you should either wrap your axios request with try/catch if using async/await, or simply use then..catch methods.
Here's a simple example
axios.get('http://api.com')
.then((response) => {
if (response.data.length === 0) { // Lets check if response contains any items
// Do Your 'no items found' logic here
console.log('No items found')
return
} else { // We have items, handle them here!
// We have some items, lets log them
console.log(response.data)
}
})
.catch((error) => {
// Catch and handle any errors here
console.log(error)
})

Vue Router beforeRouteEnter API call response not 'working'

I cannot see why the function is not returning its call back correctly.
I have a list of vehicle on one route and then another route to display that vehicles resource.
This is what I have in my Single file component for the single vehicle resource:
export default {
data() {
return {
vehicle: null,
error: null
}
},
created() {
},
beforeRouteEnter(to, from, next) {
function getVehicle(id) {
console.log('called');
return axios.get(`/api/v1/vehicles/${id}`);
}
getVehicle(to.params.id, (err, vehicle) => {
console.log('response');
next(vm => vm.setData(err, vehicle))
});
},
methods: {
setData (err, vehicle) {
if (err) {
this.error = err.toString();
} else {
this.vehicle = vehicle;
}
}
}
}
This issue is that when clicking a vehicle link, the API call is correctly made and returning a valid response but yet the next() method isn't called and the console log for 'response' isn't shown neither but the 'called' one is.
Not sure on the logic behind it, but had to use .then() for my getVehicle response before it would work. So changed to:
getVehicle(to.params.id).then( response => {
next( vm =>
vm.setData(response)
);
});
I'm not sure it will work with a function inside the beforeRouteEnter guard. Instead try call the axios get method like
let data = axios.get('/api/v1/vehicles/${to.params.id})
next(vm.setData(err, data))
This should work

Execute custom functions one after another - Callback logic in Vue.js

There is a form which submits some data to an API in my component. Assume that it's method is ProcessLogin(). Inside this function I have written my API calls using axios. With the help of then() I have handled my server response and displayed my toast. All good.
Now as a part of my code clean up, I have decided to move all my axios functions to another api.js file and export functions from there. Here is an example function I have in my api.js file :
function ApiLogin(data) {
const url = `${BASE_URL}/authenticate`;
axios.post(url,data).then(response => {
return response;
}).catch(error => {
return error.response;
});
}
On the other side in my component I have my method defined as below :
methods: {
ProcessLogin() {
var status = ApiLogin(this.data);
console.log(status);
}
}
When executing this, I get undefined on my console. I know why it is happening. Because console.log(status) executes before ApiLogin could process and sends it's response. How to handle this kind of situation.? I know that callback is the rescue here, but I am not really sure about how to integrate it.
If you return the axios call from your ApiLogin function:
function ApiLogin(data) {
const url = `${BASE_URL}/authenticate`
return axios.post(url, data)
}
You could then handle the response in your component using then and console log from there:
methods: {
ProcessLogin() {
ApiLogin(this.data)
.then(res => console.log(res))
.catch(err => console.log(err))
}
}
...or with async/await:
methods: {
ProcessLogin: async function() {
try {
var status = await ApiLogin(this.data)
console.log(status)
}
catch(err) {
console.log(err)
}
}
}