Function handleServerside

dash/dash-renderer/src/actions/callbacks.ts:463–691

(
    dispatch: any,
    hooks: any,
    config: any,
    payload: ICallbackPayload,
    background: BackgroundCallbackInfo | undefined,
    additionalArgs: [string, string, boolean?][] | undefined,
    getState: any,
    running: any
)

}

function handleServerside(
    dispatch: any,
    hooks: any,
    config: any,
    payload: ICallbackPayload,
    background: BackgroundCallbackInfo | undefined,
    additionalArgs: [string, string, boolean?][] | undefined,
    getState: any,
    running: any
): Promise<CallbackResponse> {
    if (hooks.request_pre) {
        hooks.request_pre(payload);
    }

    const requestTime = Date.now();
    const body = JSON.stringify(payload);
    let cacheKey: string;
    let job: string;
    let runningOff: any;
    let progressDefault: any;
    let moreArgs = additionalArgs;

    if (running) {
        dispatch(sideUpdate(running.running, payload));
        runningOff = running.runningOff;
    }

    const fetchCallback = () => {
        const headers = getCSRFHeader(config) as any;
        let url = `${urlBase(config)}_dash-update-component`;
        let newBody = body;

        const addArg = (name: string, value: string) => {
            let delim = '?';
            if (url.includes('?')) {
                delim = '&';
            }
            url = `${url}${delim}${name}=${value}`;
        };
        if (cacheKey || job) {
            if (cacheKey) addArg('cacheKey', cacheKey);
            if (job) addArg('job', job);

            // clear inputs as background callback doesnt need inputs, just verify for context
            const tmpBody = JSON.parse(newBody);
            for (let i = 0; i < tmpBody.inputs.length; i++) {
                tmpBody.inputs[i]['value'] = null;
            }
            for (let i = 0; i < (tmpBody?.state || []).length; i++) {
                tmpBody.state[i]['value'] = null;
            }
            newBody = JSON.stringify(tmpBody);
        }

        if (moreArgs) {
            moreArgs.forEach(([key, value]) => addArg(key, value));
            moreArgs = moreArgs.filter(([_, __, single]) => !single);
        }