Class: Toolchest::RackApp

Inherits:
Object
  • Object
show all
Defined in:
lib/toolchest/rack_app.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(mount_key: :default) ⇒ RackApp

Returns a new instance of RackApp.



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# File 'lib/toolchest/rack_app.rb', line 5

def initialize(mount_key: :default)
  @mount_key = mount_key.to_sym
  @server = build_mcp_server
  @transport = MCP::Server::Transports::StreamableHTTPTransport.new(@server)
  @server.transport = @transport
  install_handlers!
end

Instance Attribute Details

#mount_key ⇒ Object (readonly)

Returns the value of attribute mount_key.



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# File 'lib/toolchest/rack_app.rb', line 3

def mount_key
  @mount_key
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/toolchest/rack_app.rb', line 13

def call(env)
  request = Rack::Request.new(env)
  env["toolchest.mount_key"] ||= @mount_key.to_s

  auth = authenticate(request)

  if auth.nil? && config.auth != :none
    mount_path = config.mount_path || "/mcp"
    resource_metadata = "#{request.base_url}/.well-known/oauth-protected-resource#{mount_path}"
    return [401, {
      "WWW-Authenticate" => %(Bearer resource_metadata="#{resource_metadata}"),
      "Content-Type" => "application/json"
    }, ['{"error":"unauthorized"}']]
  end

  Toolchest::Current.set(auth: auth, mount_key: @mount_key.to_s) do
    status, headers, body = @transport.handle_request(request)
    # The transport may return a streaming body (proc) that executes after
    # Current.set unwinds. Wrap it to restore Current for the duration.
    wrapped_body = if body.respond_to?(:call)
      captured_auth = auth
      captured_mount = @mount_key.to_s
      proc { |stream|
        Toolchest::Current.set(auth: captured_auth, mount_key: captured_mount) do
          body.call(stream)
        end
      }
    else
      body
    end
    [status, headers.dup, wrapped_body]
  end
end