add /kitty route to get a cat picture from CaaS

Gemfile

@@ -12,6 +12,7 @@ gem "ulid"
 gem "uuid7"
 
 gem "jwt"
+gem "httparty"
 
 group :development do
   gem "ruby-lsp"

Gemfile.lock

@@ -4,7 +4,13 @@ GEM
     anyflake (0.0.1)
     ast (2.4.2)
     base64 (0.2.0)
+    bigdecimal (3.1.8)
+    csv (3.3.0)
     diff-lcs (1.6.0)
+    httparty (0.22.0)
+      csv
+      mini_mime (>= 1.0.0)
+      multi_xml (>= 0.5.2)
     json (2.10.1)
     jwt (2.10.1)
       base64
@@ -12,8 +18,11 @@ GEM
     language_server-protocol (3.17.0.4)
     lint_roller (1.1.0)
     logger (1.6.6)
+    mini_mime (1.1.5)
     minitest (5.25.4)
     multi_json (1.15.0)
+    multi_xml (0.7.1)
+      bigdecimal (~> 3.1)
     mustermann (3.0.3)
       ruby2_keywords (~> 0.0.1)
     nanoid (2.0.0)
@@ -118,6 +127,7 @@ PLATFORMS
 
 DEPENDENCIES
   anyflake
+  httparty
   jwt
   ksuid
   minitest

app.rb

@@ -14,6 +14,8 @@ require "anyflake"
 
 require "jwt"
 
+require "httparty"
+
 $LOAD_PATH.unshift File.dirname(__FILE__) + "/lib"
 
 require "config"
@@ -495,3 +497,21 @@ get "/bytes/:size" do
 
   generate_bytes(Integer(n))
 end
+
+get "/kitty" do
+  caas_host = ENV.fetch "CAAS_SERVICE_HOST"
+  caas_port = ENV.fetch "CAAS_SERVICE_PORT"
+  url = "http://#{caas_host}:#{caas_port}/"
+  response = HTTParty.head(url)
+  content_type response.headers["content-type"]
+  stream do |out|
+    response = HTTParty.get(url, stream_body: true) do |fragment|
+      if [301, 302].include? fragment.code
+      elsif fragment.code == 200
+        out << fragment
+      else
+        raise StandardError, "non-success status code while streaming #{fragment.code}"
+      end
+    end
+  end
+end