根据Cookie信息重定向

Question

我想根据Cookie信息重定向访问者。 例如，在这种情况下：访客访问该网站，将向他展示模态，询问其邮政编码，假设他使用33146作为邮政编码，这是迈阿密邮政编码，它将邮政编码保存在cookie中，并重定向到/集合/迈阿密/

尽管重定向前一切正常，但我尝试做这样的事情，将邮政编码保存到cookie。我有一个刷新循环，即它首先重定向到/ collections / miami并继续执行直到地址栏类似于：/ collections / miami / collections / miami / collections / miami / collections / miami /这样的结果无休止的循环。

function getCookie(cname) {
  var name = cname + "=";
  var decodedCookie = decodeURIComponent(document.cookie);
  var ca = decodedCookie.split(';');
  for(var i = 0; i <ca.length; i++) {
    var c = ca[i];
    while (c.charAt(0) == ' ') {
      c = c.substring(1);
    }
    if (c.indexOf(name) == 0) {
      return c.substring(name.length, c.length);
    }
  }
  return "";
}

$(window).on('load',function(){
  if (document.cookie.indexOf('visited=true') == -1){
    $('#openModal').dialog({modal : true});
    var year = 1000*60*60*24*365;
    var expires = new Date((new Date()).valueOf() + year);
    document.cookie = "visited=true;expires=" + expires.toUTCString();
  }else{
    var zip_code = getCookie('zip_code');
    let LA = zipcodesLosAngelesUSA.includes(Number(zip_code))
    if(LA){
      var link = location.protocol + '//' + location.host + location.pathname + 'los-angeles'
      document.location.href = link
    }else{
      invalid.style.display = 'block'
    }

    let ARIZONA = zipcodesArizonaUSA.includes(Number(zip_code))
    if(ARIZONA){
      var link = location.protocol + '//' + location.host + location.pathname + 'arizona'
      document.location.href = link
    }else{
      invalid.style.display = 'block'
    }

    let TORONTO = zipcodesTorontoCAD.includes(String(zip_code))
    if(TORONTO){
      var link = location.protocol + '//' + location.host + location.pathname + 'toronto'
      document.location.href = link
    }else{
      invalid.style.display = 'block';
    }

    let MIAMI = zipcodesMiamiUSA.includes(Number(zip_code))
    if(MIAMI){
      var link = location.protocol + '//' + location.host + location.pathname + '/collections/miami/'
      document.location.href = link
    }else{
      invalid.style.display = 'block';
    }

    let NYC = zipcodesNycUSA.includes(Number(zip_code))
    if(NYC){
      var link = location.protocol + '//' + location.host + location.pathname + 'nyc'
      document.location.href = link
    }else{
      invalid.style.display = 'block';
    }
  }

submit.addEventListener("click", function(){
  let LA = zipcodesLosAngelesUSA.includes(Number(input.value))
  if(LA){
    var year = 1000*60*60*24*365;
    var expires = new Date((new Date()).valueOf() + year);
    document.cookie = "zip_code="+Number(input.value)+";expires=" + expires.toUTCString();

    var link = location.protocol + '//' + location.host + location.pathname + 'los-angeles'
    document.location.href = link
  }else{
    invalid.style.display = 'block'
  }

  let ARIZONA = zipcodesArizonaUSA.includes(Number(input.value))
  if(ARIZONA){
    var year = 1000*60*60*24*365;
    var expires = new Date((new Date()).valueOf() + year);
    document.cookie = "zip_code="+Number(input.value)+";expires=" + expires.toUTCString();

    var link = location.protocol + '//' + location.host + location.pathname + 'arizona'
    document.location.href = link
  }else{
    invalid.style.display = 'block'
  }

  let TORONTO = zipcodesTorontoCAD.includes(String(input.value))
  if(TORONTO){
    var year = 1000*60*60*24*365;
    var expires = new Date((new Date()).valueOf() + year);
    document.cookie = "zip_code="+String(input.value)+";expires=" + expires.toUTCString();

    var link = location.protocol + '//' + location.host + location.pathname + 'toronto'
    document.location.href = link
  }else{
    invalid.style.display = 'block';
  }

  let MIAMI = zipcodesMiamiUSA.includes(Number(input.value))
  if(MIAMI){
    var year = 1000*60*60*24*365;
    var expires = new Date((new Date()).valueOf() + year);
    document.cookie = "zip_code="+Number(input.value)+";expires=" + expires.toUTCString();

    var link = location.protocol + '//' + location.host + location.pathname + 'miami'
    document.location.href = link
  }else{
    invalid.style.display = 'block';
  }

  let NYC = zipcodesNycUSA.includes(Number(input.value))
  if(NYC){
    var year = 1000*60*60*24*365;
    var expires = new Date((new Date()).valueOf() + year);
    document.cookie = "zip_code="+Number(input.value)+";expires=" + expires.toUTCString();

    var link = location.protocol + '//' + location.host + location.pathname + 'nyc'
    document.location.href = link
  }else{
    invalid.style.display = 'block';
  }
})

有人可以帮助我修复这个愚蠢的错误并启发我做错了什么地方吗？