[roda] Mark upload as io bound

Use Puma 8's new 'mark_as_io_bound' option allow more threads on the IO
heavy upload call.

Author: p8

frameworks/roda/Dockerfile

@@ -12,6 +12,7 @@ ENV RUBY_MN_THREADS=1
 ENV RACK_ENV=production
 ENV WEB_CONCURRENCY=auto
 ENV MAX_THREADS=4
+ENV MAX_IO_THREADS=10
 
 WORKDIR /app
 

frameworks/roda/app.rb

@@ -69,6 +69,7 @@ class App < Roda
     end
 
     r.is 'upload' do
+      request.env["puma.mark_as_io_bound"].call
       size = 0
       buf = request.body
       while (chunk = buf.read(65536))

frameworks/roda/config.ru

@@ -17,6 +17,19 @@ class MethodGuard
   end
 end
 
+# Threads marked as IO bound are allowed to go over Puma's max thread limit.
+class MarkAsIOBoundThreads
+  def initialize(app)
+    @app = app
+  end
+
+  def call(env)
+    env["puma.mark_as_io_bound"].call
+    @app.call(env)
+  end
+end
+
+use MarkAsIOBoundThreads
 use MethodGuard
 use Rack::Deflater # enable gzip
 run App

frameworks/roda/puma.rb

@@ -1,4 +1,5 @@
 threads ENV.fetch('MAX_THREADS', 4).to_i
+max_io_threads ENV.fetch("MAX_IO_THREADS", 10).to_i
 
 tls_cert_path = ENV.fetch('TLS_CERT', '/certs/server.crt')
 tls_key_path = ENV.fetch('TLS_KEY', '/certs/server.key')