Add example annotation store backend

example/annotation_store.rb

@@ -0,0 +1,53 @@
+# A simple example backend
+require 'sinatra'
+require 'json'
+
+set :port, 9393
+set :public, File.dirname(__FILE__) + '/..'
+
+annotations = {}
+
+def jsonpify(stuff)
+  if params[:callback]
+    "#{params[:callback]}(#{stuff.to_json})"
+  else
+    stuff.to_json
+  end
+end
+
+get '/store/annotations/all' do
+  jsonpify(annotations.values)
+end
+
+put '/store/annotations' do
+  if params.any?
+    id = (annotations.keys.max || 0) + 1;
+    annotations[id] = params
+    annotations[id]['id'] = id
+    return 201, jsonpify(annotations[id])
+  else
+    return 400, 'No parameters given. Annotation not created'
+  end
+end
+
+get '/store/annotations/:id' do |id|
+  if annotations.has_key? id.to_i
+    return jsonpify(annotations[id.to_i])
+  else
+    return 404, 'Annotation not found'
+  end
+end
+
+delete '/store/annotations/:id' do |id|
+  if annotations.has_key? id.to_i
+    annotations.delete(id.to_i)
+    return 204
+  else
+    return 404, 'Annotation not found'
+  end
+end
+
+get '/testparams' do
+  require 'yaml'
+  return '<code><pre>' + params.to_yaml + '</pre></code>'
+end