Include example backend implementation for the connect feature

config/examples/connect_backend_ruby/main.rb

@@ -0,0 +1,40 @@
+require "sinatra"
+
+# Authentication token
+$token = "test"
+
+# List of all availble resources
+$resources = {
+  "id1" => "postgres://localhost:5432/db1?sslmode=disable",
+  "id2" => "postgres://localhost:5432/db2?sslmode=disable",
+  "id3" => "postgres://localhost:5432/db3?sslmode=disable"
+}
+
+helpers do
+  def error(code, message)
+    halt(code, JSON.dump(error: message))
+  end
+end
+
+before do
+  content_type :json
+end
+
+post "/" do
+  req = JSON.load(request.body) || {}
+
+  unless req["resource"]
+    halt 404, "Resource ID required"
+  end
+
+  # Check the resource
+  resource = $resources[req["resource"]]
+  if !resource
+    halt 404, "Invalid resource ID"
+  end
+
+  # Return connection credentials
+  JSON.dump(
+    database_url: resource
+  )
+end