The code behind: https://wisparks-getlocation.joe.workers.dev/

index.js

addEventListener('fetch', event => {
  event.respondWith(handleRequest(event.request))
})

function getUrlVars(url) {
    var vars = {};
    var parts = url.replace(/[?&]+([^=&]+)=([^&]*)/gi, function(m,key,value) {
        vars[key] = value;
    });
    return vars;
}

async function handleRequest(request) {
  // Is it a get request?
  if(request.method == 'GET'){
    // Set the latitude
    if(typeof getUrlVars(request.url)["latitude"] !== 'undefined'){
      latitude = getUrlVars(request.url)["latitude"];
    }
    else{
      latitude = request.cf.latitude;
    }
    // Set the longitude
    if(typeof getUrlVars(request.url)["longitude"] !== 'undefined'){
      longitude = getUrlVars(request.url)["longitude"];
    }
    else{
      longitude = request.cf.longitude;
    }

    // API Crap
    let endpoint = "https://www.mapquestapi.com/geocoding/v1/reverse?key=(** API KEY GOES HERE **)&location="+latitude+"%2C"+longitude+"&outFormat=json&thumbMaps=false";

    const init = {
      headers: {
        "content-type": "application/json;charset=UTF-8",
      },
    }

    const response = await fetch(endpoint,init)
    const mqContent = await response.json()

    // If this is a get response, just use the values from mapquest
    city = mqContent.results[0].locations[0].adminArea5;
    state = mqContent.results[0].locations[0].adminArea3;
    zip = mqContent.results[0].locations[0].postalCode;
  }else{
    // If this isn't a get response, just use the values from request.cf
    city = request.cf.city;
    state = request.cf.region;
    zip = request.cf.postalCode;
    latitude = request.cf.latitude;
    longitude = request.cf.longitude;
  }

  // How confident am I that this location is accurate?
  let precisionConfidence = 'neutral';
  if(request.cf.asOrganization == 'Spectrum'){
    precisionConfidence = 'high';
  }
  if(request.cf.asOrganization == 'T-Mobile USA'){
    precisionConfidence = 'low';
  }
  if(request.cf.asOrganization == 'CenturyLink'){
    precisionConfidence = 'low';
  }
  if(request.cf.asOrganization == 'AT&T U-verse'){
    precisionConfidence = 'high';
  }
  if(request.cf.asOrganization == 'Google Fi'){
    precisionConfidence = 'low';
  }
  if(request.cf.asOrganization == 'Verizon Wireless'){
    precisionConfidence = 'low';
  }
  if(request.cf.asOrganization == 'TDS Telecom'){
    precisionConfidence = 'high';
  }
  if(request.cf.asOrganization == 'University of Wisconsin - Milwaukee'){
    precisionConfidence = 'high';
  }
  if(request.cf.asOrganization == 'Apple'){
    precisionConfidence = 'high';
  }

  // The struct that holds the details of who the user is
  let user = {
    latitude:latitude,
    longitude:longitude,
    city:city,
    state:state,
    zip:zip,
    precisionConfidence:precisionConfidence
  }

  return new Response(JSON.stringify(user, null, 2), {
      headers: {
        "content-type": "application/json;charset=UTF-8",
        "Access-Control-Allow-Origin": "https://*.jws.app",
        "Access-Control-Allow-Methods": "GET",
        "Access-Control-Max-Age": "86400",
      }
    })
}