customProtocols.js

const { protocol } = require('electron');

protocol.registerHttpProtocol(
  'mist',
  (request, callback) => {
    // callback({mimeType: 'text/html', data: Buffer.from('<h5>Response</h5>')});

    console.log(
      request.url.indexOf('mist://interface') !== -1
        ? global.interfaceAppUrl + request.url.replace('mist://interface', '')
        : ''
    );

    const call = {
      url:
        request.url.indexOf('mist://interface') !== -1
          ? global.interfaceAppUrl + request.url.replace('mist://interface', '')
          : '', // 'http://localhost:3050/' + request.url.replace('mist://',''),
      method: request.method,
      referrer: request.referrer
    };

    console.log(call);
    // console.log(call);

    callback(call);
  },
  error => {
    if (error) {
      console.error('Failed to register protocol');
    }
  }
);

// protocol.registerProtocol('eth', function(request) {
//     var url = request.url.substr(7)
//     return new protocol.RequestStringJob({data: 'Hello'});
// });

// protocol.registerProtocol('bzz', function(request) {
//     var url = request.url.substr(7)
//     return new protocol.RequestStringJob({data: 'Hello'});
// });

// protocol.registerStandardSchemes(['mist','eth', 'bzz']); //'eth', 'bzz'