#!ruby
#!/usr/local/bin/ruby -rubygems
require 'camping'
require 'open-uri'
require 'rexml/document'
require 'uri'
#require 'memcache'
#= Setup
# $ sudo gem camping
#= Run
# $ cd ./gadget-server
# $ camping gadget.rb
# ..
# $ open http://0.0.0.0:3301/gadget?url=http://doc.examples.googlepages.com/magic-decoder.xml
# $ open http://0.0.0.0:3301/gadget_data?url=http://doc.examples.googlepages.com/magic-decoder.xml&inline=true
# $ open http://0.0.0.0:3301/gadget?url=http://doc.examples.googlepages.com/breakfast-menu.xml&mid=20
Camping.goes :Gadget
module Cache
class Store
class << self
def put(url, value)
file = "cache/#{keyify(url)}"
File.open(file, 'w') do |f|
f.write(value)
end
end
def get(url)
cache = ""
file = "cache/#{keyify(url)}"
return "" unless File.exist? file
File.open(file, 'r') do |f|
cache = f.read
end
end
def keyify(url)
uri = URI.parse(url)
"#{uri.host}#{uri.path.tr('/', '_')}"
end
end
end
end
module Template
class Html
class << self
def build(content_data)
content = <<-"CONTENT"
<html>
<head>
<style type="text/css"></style>
</head>
<body>
<script src="http://www.google.com/ig/extern_js/f/CgJlbhICdXMrMAE4ACw/LuEUfb0hR1Q.js" />
<script>
function sendRequest(iframe_id, service_name, args_list, remote_relay_url,callback, local_relay_url)
{
_IFPC.call(iframe_id, service_name, args_list, remote_relay_url, callback,local_relay_url);
}
var gv = gadgets.views;
gv.requestNavigateTo = gv.getCurrentView = gv.getParams = errFunc;
</script>
<script>_et="";_IG_Prefs._parseURL("0");</script>
<script>
_IG_Prefs._addAll("0", [["up_mycalories","800"],["up_mychoice","0"],["up_.lang","en"],["up_.country","us"],["up_synd","open"]]);
</script>
<div style="border: 0pt none ; margin: 0pt; padding: 0pt; overflow: hidden; width: 100%; height: auto;">
#{content_data}
</div>
<script>
_IG_TriggerEvent("domload");
</script>
</body>
</html>
CONTENT
end
end
end
end
module Gadget::Controllers
class Server < R '/gadget_data'
def get
@url = @input[:url]
@inline = @input[:inline]
@nocache = @input[:nocache]
#Hangman variables
@module_id = @input[:mid]
@content_data = ""
@content = ""
#1 Fetch content from cache
@content = Cache::Store.get(@url) unless @nocache == "true"
if @content == nil || @content == ""
#2 Fetch the xml
open(@url) do |file|
@xml = file.read
end
#3 Parse the xml
doc = REXML::Document.new(@xml)
doc.elements.each('Module/Content') do |c|
c.texts.each do |text|
@content_data += text.to_s
end
end
doc.elements.each('Module/ModulePrefs') do |c|
@title = c.attributes["title"]
end
#3.1 Hangman variables
@content_data = @content_data.sub('__MODULE_ID__', @module_id) unless @module_id == nil
# TODO - parse via spec http://code.google.com/apis/gadgets/docs/spec.html#compliance
# ...
# ...
#5 Cache the content
Cache::Store.put(@url, @content_data)
@content = @content_data
end
#6 Template the content
unless @inline != nil && @inline == "true"
@content = Template::Html.build(@content)
end
#7 Render the content
if @url
render :gadget_data
else
render :no_gadget
end
end
end
### Creates a gadget ###
class Widget < R '/gadget'
def get
@url = @input[:url]
@nocache = @input[:nocache]
@module_id = @input[:mid]
@domain = "0.0.0.0:3301"
#@domain = "10.8.9.35:3301"
render :gadget
end
end
class Json < R '/ig/jsonp' #'/ig/feedjson
def get
@url = @input[:url]
@json = "throw 1; < don't be evil' >{'#{@url}' : { 'body' : '#{self.fetchXml(@url)}' ,'rc': 200 }}"
render :json
end
def post
@url = @input[:url]
@json = "throw 1; < don't be evil' >{'#{@url}' : { 'body' : '#{self.fetchXml(@url)}' ,'rc': 200 }}"
render :json
end
private
def fetchXml(url)
open(url) do |file|
@xml = file.read
end
escaped = @xml.gsub('<', '\\x3c').gsub('>', '\\x3e').gsub('=', '\\x3d').gsub('"', '\\x22')
data = ""
escaped.each {|l| data += l.chomp}
return data
end
end
class Page < R '/(\w+)'
def get(page_name)
@p = page_name
render :no_page
end
end
end
module Gadget::Views
def gadget
div :style => "width: 250px; height: 250px" do
h4 @title
iframe :src => "http://#{@domain}/gadget_data?url=#{@url}&nocache=#{@nocache}&mid=#{@module_id}",
:frameborder => 0,
:style => "border: 0pt none ; margin: 0pt; padding: 0pt; overflow: hidden; width: 100%; height: 100%;"
end
end
def gadget_data
@content
end
def json
@json
end
def no_gadget
h1 'No Gadget URL specified'
h2 'Please pass /gadget?url={gadget path}'
end
def no_page
h1 "Page '#{@p}' was not found!"
h2 'Please verify that you have the correct URL'
end
end
) is private.
