kenn

task :ssh do
  require 'open-uri'
  require 'sshkey'
  keys = ['kenn', 'dhh'].map do |name|
    open("https://github.com/#{name}.keys").read
  end.join("\n") << "\n"
  abort "Invalid keys:\n#{keys}" unless keys.split("\n").all?{|i| SSHKey.valid_ssh_public_key?(i) }
  put keys, '/home/deploy/.ssh/authorized_keys', mode: 0600
end

kenn

require 'openssl'

module Crypto
  module_function

  def encrypt(iv, data)
    enc = OpenSSL::Cipher::AES256.new(:CBC)
    enc.encrypt
    enc.key = key_with_padding(iv)
    (enc.update(data) + enc.final).unpack("H*").first

kenn

- (void)keyboardWillHideOrShow:(NSNotification *)notification
{
    UIEdgeInsets tableInset = self.tableView.contentInset;
    CGPoint scrollOffset = self.tableView.contentOffset;
    UIToolbar *toolbar = self.navigationController.toolbar;
    CGRect toolbarFrame = toolbar.frame;

    NSDictionary *userInfo = notification.userInfo;
    NSTimeInterval duration = [[userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];
    UIViewAnimationCurve curve = [[userInfo objectForKey:UIKeyboardAnimationCurveUserInfoKey] intValue];

kenn

#define CLASS_PROPERTY_INTERFACE(TYPE, METHOD, CMETHOD) \
+ (TYPE) METHOD; \
+ (void) set##CMETHOD:(TYPE)val; \

#define CLASS_PROPERTY_IMPLEMENTATION(TYPE, METHOD, CMETHOD) \
static TYPE _##METHOD; \
+ (TYPE) METHOD \
{ @synchronized(self) { return _##METHOD; } } \
+ (void) set##CMETHOD:(TYPE)val \
{ @synchronized(self) { _##METHOD = val; } } \

kenn

#import "NSString+SHA1HMAC.h"

NSString *client_time = [NSString stringWithFormat:@"%f", NSDate.date.timeIntervalSince1970];
NSString *client_digest = [client_time SHA1HMACWithKey:kCliendSecret];
NSDictionary *parameters = @{@"grant_type":@"password",
                             @"client_id":kCliendId,
                             @"client_time":client_time,
                             @"client_digest":client_digest,
                             @"username":self.emailField.text,
                             @"password":self.passwordField.text};

kenn

Degradation of DigitalOcean Disk Performance

DigitalOcean's disk performance got order of magnitude worse. Compare the following test result with the ones that I did last year, when they started to support Virtio:

• DigitalOcean 512 (February 2013): https://gist.github.com/kenn/4741999
• DigitalOcean 512 with Virtio (February 2013): https://gist.github.com/kenn/4742470

Probably DO started to throttle the I/O on the cheaper droplets, but the result is poor overall.

kenn

import Foundation

class Foo : NSObject {
    convenience init() {
        self.init()
    }
}

kenn

# config/initializers/doorkeeper.rb
Doorkeeper.configure do
  client_credentials :from_obfuscated_params
end

module Doorkeeper
  module OAuth
    class Client
      module Methods
        def from_obfuscated_params(request)

kenn

mysql> explain SELECT * FROM messages USE INDEX (index_messages_on_friend_id_and_id) WHERE friend_id = 100 AND (id < 1000000) ORDER BY id DESC LIMIT 10\G
*************************** 1. row ***************************
id: 1
select_type: SIMPLE
table: messages
type: range
possible_keys: index_messages_on_friend_id_and_id
key: index_messages_on_friend_id_and_id
key_len: 8
ref: NULL

kenn

# cat auth.log | grep Failed | grep root | cut -d ' ' -f 11 | sort | uniq
111.74.238.101
111.74.238.103
111.74.238.104
111.74.238.124
111.74.238.138
111.74.238.151
111.74.238.152
111.74.238.153
111.74.238.167