Remove thin from BOSH Director integration specs

The Director already uses Puma in production mode, but was still using
Thin for a local file server in the integration specs. This converts
that test server to Puma as well.

Additionally, the bosh-nats-sync gem declared a dependency on Thin that
it never used.

Signed-off-by: Aram Price <pricear@vmware.com>

src/Gemfile.lock

@@ -65,7 +65,6 @@ PATH
       sinatra (~> 2.2.0)
       sys-filesystem (~> 1.4.1)
       talentbox-delayed_job_sequel (~> 4.3)
-      thin
       tzinfo-data
       unix-crypt (~> 1.3.0)
 
@@ -97,7 +96,6 @@ PATH
       openssl (>= 3.2.0)
       rest-client
       sinatra (~> 2.2.0)
-      thin
 
 PATH
   remote: bosh-template

src/bosh-director/bosh-director.gemspec

@@ -60,7 +60,6 @@ Gem::Specification.new do |spec|
   spec.add_dependency 'sinatra',          '~>2.2.0'
   spec.add_dependency 'sys-filesystem',   '~>1.4.1'
   spec.add_dependency 'talentbox-delayed_job_sequel', '~>4.3'
-  spec.add_dependency 'thin'
   spec.add_dependency 'tzinfo-data'
   spec.add_dependency 'unix-crypt',       '~>1.3.0'
 end

src/bosh-director/lib/bosh/director/api/controllers/base_controller.rb

@@ -79,7 +79,7 @@ def requires_authentication?
           true
         end
 
-        after { headers('Date' => Time.now.rfc822) } # As thin doesn't inject date
+        after { headers('Date' => Time.now.rfc822) } # As puma doesn't inject date
 
         configure do
           set(:show_exceptions, false)

src/bosh-nats-sync/bosh-nats-sync.gemspec

@@ -24,7 +24,6 @@ Gem::Specification.new do |spec|
   spec.add_dependency 'em-http-request'
   spec.add_dependency 'nats-pure'
   spec.add_dependency 'openssl', '>=3.2.0'
-  spec.add_dependency 'thin'
   spec.add_dependency 'sinatra',   '~>2.2.0'
   spec.add_dependency 'rest-client'
 end

src/spec/support/local_file_server.rb

@@ -1,13 +1,15 @@
 require 'bosh/dev/sandbox/service'
 require 'bosh/dev/sandbox/socket_connector'
+require 'puma'
+require 'puma/configuration'
 
 module Bosh::Spec
   class LocalFileServer
     def initialize(directory, port, logger)
       @port = port
       @logger = logger
 
-      builder = Rack::Builder.new do
+      builder = ::Puma::Rack::Builder.app do
         use Rack::CommonLogger
         use Rack::ShowExceptions
         run Rack::Directory.new(directory)
@@ -19,7 +21,13 @@ def initialize(directory, port, logger)
 
       @server_thread = Thread.new do
         begin
-          Rack::Handler::Thin.run builder, :Port => port
+          puma_configuration = ::Puma::Configuration.new do |user_config|
+            user_config.tag 'local-file-server'
+            user_config.bind "tcp://localhost:#{port}"
+            user_config.app builder
+          end
+          puma_launcher = ::Puma::Launcher.new(puma_configuration)
+          puma_launcher.run
         rescue Interrupt
           # that's ok, the spec is done with us...
         end