javascript - How to make a GET request to Tomcat using ReactJS + Node.js Express? -

there mysql database , tomcat server attempting make request to, using reactjs + node.js express:

my request is:

  fetchapi() {     var data = {       'content-type': 'application/json',       'start': 'test1234567890'     }      var myinit = {       method: 'get',       mode: 'cors',       header: data,     };      return function(dispatch) {       dispatch({         type: 'fetch_api'       });        fetch('http://www.localhost:8080/form/upload/post/', myinit)         .then(result=>result.json())         .then(info=>{           console.log(info);         });      }   } 

with express set as:

var express = require('express'); var path = require('path'); var config = require('../webpack.config.js'); var webpack = require('webpack'); var webpackdevmiddleware = require('webpack-dev-middleware'); var webpackhotmiddleware = require('webpack-hot-middleware');  var app = express();  var compiler = webpack(config);  app.use(webpackdevmiddleware(compiler, {noinfo: true, publicpath: config.output.publicpath})); app.use(webpackhotmiddleware(compiler));  app.use(express.static('./dist'));  app.use('/', function (req, res) {   res.sendfile(path.resolve('client/index.html')); });  var port = 3005;  app.listen(port, function(error) {   if (error) throw error;   console.log("express server listening on port", port); }); 

and getting error:

no 'access-control-allow-origin' header present on requested resource. origin 'http://localhost:3005' therefore not allowed access. response had http status code 415. if opaque response serves needs, set request's mode 'no-cors' fetch resource cors disabled. 

everything works , runs fine, once called, error above.

what missing? guidance or insight appreciated. thank in advance!