silvrgit/lib/btc.js

let http = require('http');
let https = require('https');
let btcCache = {};
let balanceCache = {};
exports.doBTC = function (req, res) {
  console.log('Bitcoin request');
  function btcQuery (callback, r) {
    var req = r;
    var options = {
      host: 'api.coindesk.com',
      //  port: 80,
      path: '/v1/bpi/currentprice.json',
      // method: 'GET',
      headers: {
        /*   'Content-Type': 'application/json',
         'Content-Length': Buffer.byteLength(data)*/

      }
    };
    try {
      http.request(options).on('response', function (response) {
        var data = '';
        response.on('data', function (chunk) {
          data += chunk;
        });
        response.on('end', function () {
          console.log('>> data', data);
          let cData = {};
          try {
            cData = JSON.parse(data);
            }
          catch (e) {
            console.error(e);
          }
          finally{
            callback(cData, r);
          }

        });
        response.on('error', function (e) {
          console.error(e);
        });
      }).end();
    } catch (e) {
      console.error(e);
    }
  }

  let now = new Date();
  if (now - GLOBAL.lastcheck > (59000 )) {
    btcQuery(function (a) {
      // console.log(a);
      console.log('Got btc data.');
      btcCache = a;
      GLOBAL.lastcheck = now;
      res.setHeader('Content-Type', 'application/json');
      res.end(JSON.stringify(btcCache));
    }, res);
  } else {
    console.log('Using cache');
    res.setHeader('Content-Type', 'application/json');
    res.end(JSON.stringify(btcCache));
  }
};

exports.doBalance = function (req, res) {
    console.log('Bitcoin request');
      function balanceQuery (callback, r) {
        var req = r;

        // https://blockexplorer.com/api/addr/18sLVW5Aswp2KWLr4hMFZsuSPtvAauFiif
        var options = {
          host: 'blockexplorer.com',
          //  port: 80,
          path: '/api/addr/18sLVW5Aswp2KWLr4hMFZsuSPtvAauFiif',
          // method: 'GET',
          headers: {
            /*   'Content-Type': 'application/json',
             'Content-Length': Buffer.byteLength(data)*/

          }
        };
        try {
          https.get('https://blockexplorer.com/api/addr/18sLVW5Aswp2KWLr4hMFZsuSPtvAauFiif').on('response', function (response) {
            var data = '';
            response.on('data', function (chunk) {
              data += chunk;
            });
            response.on('end', function () {
              console.log('>> data', data);
              let cData = {};
              try {
                cData = JSON.parse(data);
                }
              catch (e) {
                console.error(e);
              }
              finally{
                callback(cData, r);
              }

            });
            response.on('error', function (e) {
              console.error(e);
            });
          }).end();
        } catch (e) {
          console.error(e);
        }
      }

      let now = new Date();
      if (now - GLOBAL.lastcheck > (59000 )) {
          balanceQuery(function (a) {
          // console.log(a);
          console.log('Got balance data.');
          balanceCache = a;
          GLOBAL.lastcheck = now;
          res.setHeader('Content-Type', 'application/json');
          res.end(JSON.stringify(balanceCache));
        }, res);
      } else {
        console.log('Using cache');
        res.setHeader('Content-Type', 'application/json');
        res.end(JSON.stringify(balanceCache));
      }

};