How to cancel all unneccesary requests in vuex, axios

user_13606664 0
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I have a situation: when I live a page, async functions in mounted hook continue working (such as await this.getUser({id: 1})). I'm trying to use axios.CancelToken, but unfortunately it cancels only the first request (not all requested). Send request function:

const source = axios.CancelToken.source();
const config = {
    headers: {
        authorization: `${prefix}${localStorage.getItem('authorization')}`
    },
    cancelToken: source.token
};
store.commit('SET_CANCEL_SOURCE', source);

const response = await axios.get(url, config);

Store mutations:

SET_CANCEL_SOURCE: (state, cancel: CancelTokenSource) => {
    state.cancelTokens.push(cancel);
},
RESET_CANCEL_TOKENS: (state) => {
    if (state.cancelTokens.length) {
        state.cancelTokens.map((item: any, index: number) => {
            console.log(index, item);
            item.cancel();
        });
        state.cancelTokens = [];
    }
}

Store action:

clearToken ({commit}) {
    commit('RESET_CANCEL_TOKENS');
}

And beforeUnmount for component:

beforeUnmount() {
    this.clearToken();
}

Any ideas?

axios vuex vue.js cancellation
1 Answers

The point is that CancelToken cancels only those requests that are already sent. The best solution I found is to make stages of loading information, create a variable, that represents the current stage and in beforeUnmount make variable isCancelled = true. So that next stages will not be excuted. Example:

data: () => ({
    stage: 0,
    isCancelled: false,
}),
async setInitialData() {
    if (this.stage >= 4 || this.isCancelled) {
        return;
    }

    switch (this.stage) {
        case 0:
            await action1();
            break;

        case 1:
            await action2();
            break;

        case 2:
            await action3();
            break;

        case 3:
            await action2();
            break;

        default:
            break;
    }

    this.stage++;
    await this.setInitialData();
},
async mounted() {
    await this.setInitialData();
},
beforeUnmount() {
    this.isCancelled = true;
},
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