SimpleHttpRequest

gistfile1.txt

http://www.w3.org/TR/XMLHttpRequest/#dom-xmlhttprequest-setrequestheader

SimpleHttpRequest.js

(function(module){

  var hop =  Object.prototype.hasOwnProperty;

  var urlEncode = function(flatObject) {
    var result = []; 
    for (var p in flatObject) if (hop.call(flatObject,p)) {
      result.push(encodeURIComponent(p)+'='+encodeURIComponent(flatObject[p]));
    }
    return result.join('&');
  }

  var httpRequesterFactory = (function() {
    if (typeof XMLHttpRequest === 'function') {
       return function(){return new XMLHttpRequest()};
    }
    else {
      try {
        return function(){return new ActiveXObject("Msxml2.XMLHTTP");}
      } 
      catch(ex){
        try {
          return function(){return new ActiveXObject("Microsoft.XMLHTTP");}
        }
        catch(ex){
          throw ex;
        } 
      }
    }
  })();

  var httpKernel = function(method,url, data, headerName, headerValue) {
    var good, bad;
    var r = httpRequesterFactory();
    r.onreadystatechange = function(){
      if (r.readyState === 4) {
        if (r.status === 200) 
          good(r.responseText);
        else
          bad(r.responseText);                        
      }
    }

    r.open(method,url);
    if (typeof headerName !== 'undefined') r.setRequestHeader(headerName,headerValue); 
    r.send(data);
    return function(g,b){good = g; bad  = b;};
  }

  var httpGet = function(url, data) {
    if (typeof data !== 'undefined')
      url = url +'?'+urlEncode(data);
    return httpKernel('GET',url,null)
  }

  var httpPost = function(url, data) {
    data = urlEncode(data);
    return httpKernel('POST',url,data,'Content-type','application/x-www-form-urlencoded');
  }

  module.httpPost = httpPost;
  module.httpGet  = httpGet;
  
})(this)