openhim-core/lib/koaMiddleware.js

The OpenHIM core application that provides logging and routing of http requests

var Q, SDC, application, authorisation, basicAuthentication, compress, config, domain, events, getRawBody, koa, messageStore, os, pollingBypassAuthentication, pollingBypassAuthorisation, proxy, rawBodyReader, requestMatching, rerunBypassAuthentication, rerunBypassAuthorisation, rerunUpdateTransactionTask, retrieveTCPTransaction, rewrite, router, sdc, stats, tcpAdapter, tcpBypassAuthentication, tlsAuthentication;

koa = require('koa');

router = require('./middleware/router');

messageStore = require('./middleware/messageStore');

basicAuthentication = require('./middleware/basicAuthentication');

tlsAuthentication = require("./middleware/tlsAuthentication");

rerunBypassAuthentication = require("./middleware/rerunBypassAuthentication");

rerunBypassAuthorisation = require("./middleware/rerunBypassAuthorisation");

rerunUpdateTransactionTask = require("./middleware/rerunUpdateTransactionTask");

tcpBypassAuthentication = require("./middleware/tcpBypassAuthentication");

retrieveTCPTransaction = require("./middleware/retrieveTCPTransaction");

requestMatching = require('./middleware/requestMatching');

authorisation = require('./middleware/authorisation');

stats = require('./stats');

pollingBypassAuthorisation = require('./middleware/pollingBypassAuthorisation');

pollingBypassAuthentication = require('./middleware/pollingBypassAuthentication');

events = require('./middleware/events');

proxy = require('./middleware/proxy');

rewrite = require('./middleware/rewriteUrls');

config = require('./config/config');

config.authentication = config.get('authentication');

getRawBody = require('raw-body');

tcpAdapter = require('./tcpAdapter');

Q = require("q");

config.statsd = config.get('statsd');

application = config.get('application');

SDC = require('statsd-client');

os = require('os');

domain = (os.hostname()) + "." + application.name + ".appMetrics";

sdc = new SDC(config.statsd);

compress = require('koa-compress');

rawBodyReader = function*(next) {
  var body, startTime;
  if (config.statsd.enabled) {
    startTime = new Date();
  }
  body = (yield getRawBody(this.req, {
    length: this.length,
    encoding: this.charset
  }));
  if (body) {
    this.body = body;
  }
  if (config.statsd.enabled) {
    sdc.timing(domain + ".rawBodyReaderMiddleware", startTime);
  }
  return (yield next);
};

exports.setupApp = function(done) {
  var app;
  app = koa();
  if (config.authentication.enableBasicAuthentication) {
    app.use(basicAuthentication.koaMiddleware);
  }
  if (config.authentication.enableMutualTLSAuthentication) {
    app.use(tlsAuthentication.koaMiddleware);
  }
  app.use(rawBodyReader);
  app.use(requestMatching.koaMiddleware);
  app.use(authorisation.koaMiddleware);
  app.use(compress({
    threshold: 8,
    flush: require("zlib").Z_SYNC_FLUSH
  }));
  app.use(proxy.koaMiddleware);
  app.use(messageStore.koaMiddleware);
  app.use(rewrite.koaMiddleware);
  app.use(events.koaMiddleware);
  app.use(router.koaMiddleware);
  return done(app);
};

exports.rerunApp = function(done) {
  var app;
  app = koa();
  app.use(rawBodyReader);
  app.use(rerunBypassAuthentication.koaMiddleware);
  app.use(rerunBypassAuthorisation.koaMiddleware);
  app.use(rerunUpdateTransactionTask.koaMiddleware);
  app.use(messageStore.koaMiddleware);
  app.use(authorisation.koaMiddleware);
  app.use(events.koaMiddleware);
  app.use(router.koaMiddleware);
  return done(app);
};

exports.tcpApp = function(done) {
  var app;
  app = koa();
  app.use(rawBodyReader);
  app.use(retrieveTCPTransaction.koaMiddleware);
  app.use(tcpBypassAuthentication.koaMiddleware);
  app.use(proxy.koaMiddleware);
  app.use(messageStore.koaMiddleware);
  app.use(events.koaMiddleware);
  app.use(router.koaMiddleware);
  return done(app);
};

exports.pollingApp = function(done) {
  var app;
  app = koa();
  app.use(rawBodyReader);
  app.use(pollingBypassAuthentication.koaMiddleware);
  app.use(pollingBypassAuthorisation.koaMiddleware);
  app.use(messageStore.koaMiddleware);
  app.use(events.koaMiddleware);
  app.use(router.koaMiddleware);
  return done(app);
};

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