JS ad-hoc Pantheon workflow invocation and status check

workflow_caller.js

// not sure if it's the json.trace_id or json.id that is correct for the second, status check call
dumper = function(response) { console.log(response.status); response.text().then( text => console.log(text) ) }
function checkWorkflow(site_id, env_id, workflow_id) {
    p = fetch("/api/sites/" + site_id + "/environments/" + env_id + "/workflows/" + workflow_id, {
	    credentials: "include",
	    headers: {
		"accept":"*/*",
		"accept-language":"en-US,en;q=0.9,de;q=0.8,fr;q=0.7,ro;q=0.6",
		"content-type":"application/json; charset=UTF-8",
		"sec-fetch-mode":"cors",
		"sec-fetch-site":"same-origin",
		"x-requested-with":"XMLHttpRequest"
	    },
	    method: "GET",
	    mode: "cors"
	});
    p.then(dumper, dumper);
};

fetch("/api/sites/0ba30b11-ee59-49a2-89c0-e7b865f00c6f/environments/dev/workflows", {
    credentials: "include",
    headers: {
        "accept":"*/*",
        "accept-language":"en-US,en;q=0.9,de;q=0.8,fr;q=0.7,ro;q=0.6",
        "content-type":"application/json; charset=UTF-8",
        "sec-fetch-mode":"cors",
        "sec-fetch-site":"same-origin",
        "x-requested-with":"XMLHttpRequest"
    },
    body: JSON.stringify({
        params: {
            primary_domain: "ztest.mbaynton.com"
        },
        environment: "dev",
        type: "set_primary_domain"
    }),
    method: "POST",
    mode: "cors"
}).then(function(response) { console.log('workflow initiated.'); response.json().then( json => checkWorkflow(json.site_id, json.environment_id, json.trace_id) ) });