vyo

public class Echo {

  private String echo;

  public Echo(String echo) {
    this.echo = echo;
  }

  public String getEcho() {
    return echo;

vyo

/**
 * this little piece of magic provides some nice type inference info to the compiler
 *
 * courtesy of [StackOverflow](http://stackoverflow.com/a/33420043)
 */
inline fun <reified T> fromJSON(json: String): T = gson.fromJson<T>(json, object : TypeToken<T>() {}.type)

//usable as follows, and type inference doesn't even break a sweat
val project: Project = fromJSON(request.body())
val client = fromJSON<Client>(request.body())

vyo

/**
 * puts a time limit on the given [Promise]
 * make sure to specify [Promise.fail] and/or [Promise.always] to be aware of the
 * cancellation and be able to react accordingly
 *
 * @throws [IllegalArgumentException] if the given timeout is negative
 */
fun timedPromise(promise: Promise<Any, Exception>, millis: Long) {
    if (millis < 0) {

vyo

If you want to use curl or net-http/open-uri to access https resources, you will often (always?) get an error, because they don't have the large number of root certificates installed that web browsers have.

You can manually install the root certs, but first you have to get them from somewhere. This article gives a nice description of how to do that. The source of the cert files it points to is hosted by the curl project, who kindly provide it in the .pem format.

problem: Sadly, ironically, and comically, it's not possible to access that file via https! Luckily, the awesome curl project does provide us with the script that they use to produce the file, so we can do it securely ourselves. Here's how.

1. git clone https://github.com/bagder/curl.git
2. cd curl/lib
3. edit mk-ca-bundle.pl and change:

vyo

'use strict';

const httpplease = require('httpplease');
const httppleasePromise = require('httpplease-promises');
const Promise = require('bluebird');
const Please = httpplease.use(httppleasePromise(Promise));

Please.head('https://www.google.com')
  .then(function (res) {
    console.log(res.status); 

vyo

'use strict';

const RequestPromise = require('request-promise');

RequestPromise( {
  uri: 'https://google.com',
  method: 'HEAD',
  resolveWithFullResponse: true,
  simple: false
})

vyo

$ date && docker run --rm -it -v /etc/localtime:/etc/localtime:ro alpine:3.3 date
Thu Feb  4 09:46:54 CET 2016
Thu Feb  4 09:46:55 CET 2016