Set extra fields

lib/kamal/configuration/docs/proxy.yml

@@ -77,7 +77,17 @@ proxy:
     path: /health
     timeout: 3
 
-  # Max Request Body Size
+  # Buffering
   #
-  # The maximum request size in bytes that the proxy will accept, defaults to 1GB
-  max_request_body_size: 40_000_000
+  # Whether to buffer request and response bodies in the proxy
+  #
+  # By default buffering is enabled with a max request body size of 1GB and no limit
+  # for response size.
+  #
+  # You can also set the memory limit for buffering, which defaults to 1MB, anything
+  # larger than that is written to disk.
+  buffering:
+    enabled: true
+    max_request_body: 40_000_000
+    max_response_body: 0
+    memory: 2_000_000

lib/kamal/configuration/proxy.rb

@@ -44,7 +44,11 @@ class Kamal::Configuration::Proxy
       "health-check-interval": proxy_config.dig("health_check", "interval"),
       "health-check-timeout": proxy_config.dig("health_check", "timeout"),
       "health-check-path": proxy_config.dig("health_check", "path"),
-      "target-timeout": proxy_config["response_timeout"]
+      "target-timeout": proxy_config["response_timeout"],
+      "buffer": proxy_config.fetch("buffer", { enabled: true }).fetch("enabled", true),
+      "buffer-memory": proxy_config.dig("buffer", "memory"),
+      "max-request-body": proxy_config.dig("buffer", "max_request_body"),
+      "max-response-body": proxy_config.dig("buffer", "max_response_body")
     }.compact
   end