Stop a Fetch Call timing out causing automatic CC retries

General Q&A
2

Hi Fred

Yes, you can solve this using an AbortController, and passing in an abort signal into the fetch call as an additional parameter.

Something like this

import { TaskContext } from '@journeyapps/cloudcode';

export async function run(this: TaskContext) {
    // Your code here
    const AbortController = globalThis.AbortController
    const controller = new AbortController();
    let abortSource: string;
    
    // have the beforeTimeout warning trigger the AbortController
    this.on('beforeTimeout', (params) => {
        console.log(`in beforeTimeout: Triggering abort controller: Params`, params)
        abortSource = 'beforeTimeout';
        // this line sends the abort signal
        controller.abort();
        console.log('After calling abort');
    });

    // manually trigger the AbortController after a specific period of time, e.g. 3 mins
    const timeout = setTimeout(() => {
        console.log('Triggering the abort controller');
        abortSource = 'manualTimeout';
        // this line sends the abort signal
        controller.abort();
    }, 3*60*1000);
    
    const url = 'http://example.com';
    // here we are passing in the additional fetch param 'signal' to handle our abort signal
    const config = {
        method: 'GET',
        signal: controller.signal
    }
    
    console.log(`About to fetch`);
    try {
        let result = await fetch(url, config);
        if (result.ok) {
            console.log(`Result ok`);
            let response = await result.text();
            console.log(`Response: ${response}`);
        } else {
            console.log(`Result not ok`);
            console.log(`Result status: ${result.status}`)
            console.log(`Result statusText: ${result.statusText}`)
        }
    } catch (er) {
        console.log(`Error: ${er.name}`);
        if (er.name === 'AbortError') {
		    console.log(`Fetch request was aborted by: ${abortSource}`);
	    }
    }
    console.log('All done ')
    clearTimeout(timeout);
    return true;
}
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