peterwillcn

require 'openssl'

def hotp(secret, counter, digits = 6)
  hash = OpenSSL::HMAC.digest(OpenSSL::Digest.new('sha1'), secret, int_to_bytestring(counter))
  "%0#{digits}i" % (truncate(hash) % 10**digits)
end

def truncate(string)
  offset = string.bytes.last & 0xf
  partial = string.bytes[offset..offset+3]

peterwillcn

require 'openssl'

def hotp(secret, counter, digits = 6)
  hash = OpenSSL::HMAC.digest(OpenSSL::Digest.new('sha1'), secret, int_to_bytestring(counter))
  "%0#{digits}i" % (truncate(hash) % 10**digits)
end

def truncate(string)
  offset = string.bytes.last & 0xf
  partial = string.bytes[offset..offset+3]

peterwillcn

If you want a run-down of the 1.3 changes and the design decisions behidn those changes, check out the LonestarElixir Phoenix 1.3 keynote: https://www.youtube.com/watch?v=tMO28ar0lW8

To use the new phx.new project generator, you can install the archive with the following command:

$ mix archive.install https://github.com/phoenixframework/archives/raw/master/phx_new.ez

Bump your phoenix dep

Phoenix v1.3.0 is a backwards compatible release with v1.2.x. To upgrade your existing 1.2.x project, simply bump your phoenix dependency in mix.exs:

peterwillcn

1. Clone your fork:

git clone git@github.com:YOUR-USERNAME/YOUR-FORKED-REPO.git

2. Add remote from original repository in your forked repository:

cd into/cloned/fork-repo
git remote add upstream git://github.com/ORIGINAL-DEV-USERNAME/REPO-YOU-FORKED-FROM.git
git fetch upstream

peterwillcn

Deploying Elixir and Phoenix applications using Docker and Exrm

Goal

By the end of this quick guide, you will know how to compile a Phoenix app release using Exrm and run it inside a Docker container. I've found only a couple of articles that discuss getting an Elixir app up and running inside a Docker container, and even those only touched on some parts of the process. The idea is that this guide will give you a full end-to-end example of how to get all the pieces and parts working together so that you are able to deploy your Phoenix application inside a Docker container.

Assumptions

1. You already have a working Elixir environment with the Phoenix Framework installed
2. You have at least basic working knowledge of Docker, and have installed the Docker tools onto your local environment

peterwillcn

import cx_Oracle

def perform_query(query, bind_variables):
    connection = db_pool.acquire()
    cursor = connection.cursor()
    cursor.execute(query, bind_variables)
    result = cursor.fetchall()
    cursor.close()
    db_pool.release(connection)
    return result

peterwillcn

# Pod Hand-on

## Two-Container Pod

创建一个运行两个container的pod
```
kubectl create -f https://raw.githubusercontent.com/jianchen2580/k8s-example/master/pod/two-container-pod.yaml
```
查看Pod信息：

peterwillcn

Pod Hand-on

Two-Container Pod

创建一个运行两个container的pod

kubectl create -f https://raw.githubusercontent.com/jianchen2580/k8s-example/master/pod/two-container-pod.yaml

查看Pod信息：

peterwillcn

package main

import (
	"fmt"
	"time"

	"k8s.io/apimachinery/pkg/api/errors"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/client-go/kubernetes"
	"k8s.io/client-go/rest"

peterwillcn

#
# CORS header support
#
# One way to use this is by placing it into a file called "cors_support"
# under your Nginx configuration directory and placing the following
# statement inside your **location** block(s):
#
#   include cors_support;
#
# As of Nginx 1.7.5, add_header supports an "always" parameter which