Initial commit

.gitignore

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+pkg/

README.md

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+# b46url
+
+## Usage
+
+  require "b64url"
+  22507476152874102712.to_b64url # => "Thank-you-4"
+  "all_the_Fish".from_b64url # => 1961803945217736715041

Rakefile

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+begin; require 'psych'; rescue Object; nil end
+require 'rubygems'
+require './lib/b64url.rb'
+
+begin
+  require 'jeweler'
+  Jeweler::Tasks.new do |gemspec|
+    gemspec.name = "b64url"
+    gemspec.summary = "Integer to/from base64url converter"
+    gemspec.email = "pierre@moodstocks.com"
+    gemspec.homepage = "http://moodstocks.com"
+    gemspec.description = "Encode and decode integers to/from base64url using the alphabet from RFC 4648"
+    gemspec.authors = ["Pierre Chapuis"]
+    gemspec.files = FileList['lib/**/*.rb']
+  end
+rescue LoadError
+  puts "Jeweler is not available, please install it first."
+end

VERSION

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+1.0.0

lib/b64url.rb

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+module B64URL
+
+  ALPHA = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_"
+
+  class << self
+
+    def to_b64url(q)
+      s = ''
+      while q != 0
+        q,r = q.divmod(64)
+        s << ALPHA[r]
+      end
+      s.reverse!
+    end
+
+    def from_b64url(s)
+      t,m = s.chars.to_a.reverse!.map!{|x| ALPHA.index(x)},1
+      t.inject{|r,x| r+x*(m*=64)}
+    end
+
+  end
+
+end
+
+Integer.class_eval do
+
+  def to_b64url
+    B64URL.to_b64url(self)
+  end
+
+end
+
+String.class_eval do
+
+  def from_b64url
+    B64URL.from_b64url(self)
+  end
+
+end