javascript - Enabling CORs on Safari -

i have made simple angularjs website. backend google sheet, not ideal it's free. have deployed following script webapp json google sheet: (this not code btw)

  function doget(request) {     var output = contentservice.createtextoutput();     var data = {};     var id = request.parameters.id;     var sheet = request.parameters.sheet;     var cell = request.parameters.cell;     var ss = spreadsheetapp.openbyid(id);     if (sheet) {       if (cell) {         data = ss.getsheetbyname(sheet).getrange(cell).getvalue();       } else {         data[sheet] = readdata_(ss, sheet);       }     } else {       // grab sheets except name       // starts underscore       ss.getsheets().foreach(function(osheet, iindex) {         var sname = osheet.getname();         if (! sname.match(/^_/)) {           data[sname] = readdata_(ss, sname);         }       })     }     var result = cell ? data : json.stringify(data);     var callback = request.parameters.callback;     if (callback == undefined) {       output.setcontent(result);       output.setmimetype(cell ? contentservice.mimetype.text : contentservice.mimetype.json);     }     else {       output.setcontent(callback + "(" + result + ")");       output.setmimetype(contentservice.mimetype.javascript);     }     return output;   }     function readdata_(ss, sheetname, properties) {      if (typeof properties == "undefined") {       properties = getheaderrow_(ss, sheetname);       properties = properties.map(function(p) { return p.replace(/\s+/g, '_'); });     }      var rows = getdatarows_(ss, sheetname);     var data = [];     (var r = 0, l = rows.length; r < l; r++) {       var row = rows[r];       var record = {};       (var p in properties) {         record[properties[p]] = convert_(row[p]);       }       data.push(record);     }     return data;   }     function convert_(value) {     if (value === "true") return true;     if (value === "false") return false;     return value;   }     function getdatarows_(ss, sheetname) {      var sh = ss.getsheetbyname(sheetname);     return sh.getrange(2, 1, sh.getlastrow() - 1, sh.getlastcolumn()).getvalues();    }     function getheaderrow_(ss, sheetname) {      var sh = ss.getsheetbyname(sheetname);     return sh.getrange(1, 1, 1, sh.getlastcolumn()).getvalues()[0];    } 

in angular app have simple service uses angular http access webapp it's url , id of spreadsheet:

app.service('googlesheets', function($http) {   return {     getsheet: function(url, id) {       return $http({         url: url,         method: 'get',         params: {id: id}       }).then(function(data) {         return data.data;       });     }   }; }); 

this works on chrome, opera, firefox, , microsoft edge. when tried use on safari received following error:

xmlhttprequest cannot load http://<myserveraddress>/webmethods.asmx/method. cannot make requests null 

after research discovered because of way safari handles cors. read 1 question mentioning changing header involving allow-access-control-origin not know how this. kind of thing safari doesn't support or there can do? know divide spreadsheet pages separate files , access them simple requests parse html, bulkier , love avoid this.