initial import

Author: anders94

.gitignore

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+*~
+.*~
+node_modules/
+tools/runkeeper/

app.js

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+var express = require('express');
+var path = require('path');
+var favicon = require('serve-favicon');
+var logger = require('morgan');
+var cookieParser = require('cookie-parser');
+var bodyParser = require('body-parser');
+
+var routes = require('./routes/index');
+
+var app = express();
+
+// view engine setup
+app.set('views', path.join(__dirname, 'views'));
+app.set('view engine', 'jade');
+
+app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
+app.use(logger('dev'));
+app.use(bodyParser.json());
+app.use(bodyParser.urlencoded({ extended: false }));
+app.use(cookieParser());
+app.use(express.static(path.join(__dirname, 'public')));
+
+app.use('/', routes);
+
+// catch 404 and forward to error handler
+app.use(function(req, res, next) {
+  var err = new Error('Not Found');
+  err.status = 404;
+  next(err);
+});
+
+// error handlers
+
+// development error handler
+// will print stacktrace
+if (app.get('env') === 'development') {
+  app.use(function(err, req, res, next) {
+    res.status(err.status || 500);
+    res.render('error', {
+      message: err.message,
+      error: err
+    });
+  });
+}
+
+// production error handler
+// no stacktraces leaked to user
+app.use(function(err, req, res, next) {
+  res.status(err.status || 500);
+  res.render('error', {
+    message: err.message,
+    error: {}
+  });
+});
+
+
+module.exports = app;

bin/www

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+#!/usr/bin/env node
+
+/**
+ * Module dependencies.
+ */
+
+var app = require('../app');
+var debug = require('debug')('zurveys:server');
+var http = require('http');
+
+/**
+ * Get port from environment and store in Express.
+ */
+
+var port = normalizePort(process.env.PORT || '3000');
+app.set('port', port);
+
+/**
+ * Create HTTP server.
+ */
+
+var server = http.createServer(app);
+
+/**
+ * Listen on provided port, on all network interfaces.
+ */
+
+server.listen(port);
+server.on('error', onError);
+server.on('listening', onListening);
+
+/**
+ * Normalize a port into a number, string, or false.
+ */
+
+function normalizePort(val) {
+  var port = parseInt(val, 10);
+
+  if (isNaN(port)) {
+    // named pipe
+    return val;
+  }
+
+  if (port >= 0) {
+    // port number
+    return port;
+  }
+
+  return false;
+}
+
+/**
+ * Event listener for HTTP server "error" event.
+ */
+
+function onError(error) {
+  if (error.syscall !== 'listen') {
+    throw error;
+  }
+
+  var bind = typeof port === 'string'
+    ? 'Pipe ' + port
+    : 'Port ' + port;
+
+  // handle specific listen errors with friendly messages
+  switch (error.code) {
+    case 'EACCES':
+      console.error(bind + ' requires elevated privileges');
+      process.exit(1);
+      break;
+    case 'EADDRINUSE':
+      console.error(bind + ' is already in use');
+      process.exit(1);
+      break;
+    default:
+      throw error;
+  }
+}
+
+/**
+ * Event listener for HTTP server "listening" event.
+ */
+
+function onListening() {
+  var addr = server.address();
+  var bind = typeof addr === 'string'
+    ? 'pipe ' + addr
+    : 'port ' + addr.port;
+  debug('Listening on ' + bind);
+}

package.json

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+{
+  "name": "blockchain-demo",
+  "description": "A web-based demonstration of blockchain concepts.",
+  "author": {
+    "name": "Anders Brownworth"
+  },
+  "version": "0.0.1",
+  "keywords": [
+    "blockchain",
+    "demo",
+    "bitcoin"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/anders94/blockchain-demo.git"
+  },
+  "bugs": {
+    "url": "https://github.com/anders94/blockchain-demo/issues"
+  },
+  "license": "MIT",
+  "devDependencies": {
+    "async": "^1.4.2",
+    "express": "^4.13.4"
+  },
+  "homepage": "https://github.com/anders94/blockchain-demo#readme",
+  "maintainers": [
+    {
+      "name": "anders",
+      "email": "[email protected]"
+    }
+  ]
+}

public/favicon.ico

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+function sha256(block, chain) {
+  // calculate a SHA256 hash of the contents of the block
+  return CryptoJS.SHA256(getText(block, chain));
+}
+
+function updateState(block, chain) {
+  // set the well background red or green for this block
+  if ($('#block'+block+'chain'+chain+'hash').val().substr(0, 4) === '0000') {
+    $('#block'+block+'chain'+chain+'well').removeClass('well-error').addClass('well-success');
+  }
+  else {
+    $('#block'+block+'chain'+chain+'well').removeClass('well-success').addClass('well-error');
+  }
+}
+
+function updateHash(block, chain) {
+  // update the SHA256 hash value for this block
+  $('#block'+block+'chain'+chain+'hash').val(sha256(block, chain));
+  updateState(block, chain);
+}
+
+function updateChain(block, chain) {
+  // update all blocks walking the chain from this block to the end
+  for (var x = block; x <= 5; x++) {
+    if (x > 1) {
+      $('#block'+x+'chain'+chain+'previous').val($('#block'+(x-1).toString()+'chain'+chain+'hash').val());
+    }
+    updateHash(x, chain);
+  }
+}
+
+function mine(block, chain, isChain) {
+  var found = false;
+  for (var x = 0; x <= 200000 && !found; x++) {
+    $('#block'+block+'chain'+chain+'nonce').val(x);
+    $('#block'+block+'chain'+chain+'hash').val(sha256(block, chain));
+    if ($('#block'+block+'chain'+chain+'hash').val().substr(0, 4) === '0000') {
+      found = true;
+      if (isChain) {
+        updateChain(block, chain);
+      }
+      else {
+        updateState(block, chain);
+      }
+    }
+  }
+}

public/fonts/glyphicons-halflings-regular.eot

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+/*!
+ * IE10 viewport hack for Surface/desktop Windows 8 bug
+ * Copyright 2014-2015 Twitter, Inc.
+ * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
+ */
+
+// See the Getting Started docs for more information:
+// http://getbootstrap.com/getting-started/#support-ie10-width
+
+(function () {
+  'use strict';
+
+  if (navigator.userAgent.match(/IEMobile\/10\.0/)) {
+    var msViewportStyle = document.createElement('style')
+    msViewportStyle.appendChild(
+      document.createTextNode(
+        '@-ms-viewport{width:auto!important}'
+      )
+    )
+    document.querySelector('head').appendChild(msViewportStyle)
+  }
+
+})();