strata/lib/timeout.js

A modular, streaming HTTP server

var utils = require('./utils');

/**
 * A middleware that sets a limit on how long a server may attempt to handle a
 * request before an error is returned to the client.
 */
module.exports = function (app, expiry, timeoutHandler) {
  // Default expiry is 30 seconds.
  expiry = expiry || 30000;

  // Default handler is a 500.
  timeoutHandler = timeoutHandler || utils.serverError;

  function timeout(env, callback) {
    env.timeout = setTimeout(function () {
      env.timeout = null;
      timeoutHandler(env, callback);
    }, expiry);

    app(env, function (status, headers, body) {
      if (env.timeout) {
        clearTimeout(env.timeout);
        env.timeout = null;
        callback(status, headers, body);
      }
    });
  }

  return timeout;
};