Imported WebSocket client and supporting cert paths helper method

lib/common.rb

@@ -0,0 +1,9 @@
+module W3DHubLauncher
+  def self.ca_bundle_path
+    [
+      "/etc/ssl/certs/ca-certificates.crt", # Debian/Ubuntu
+      "/etc/pki/tls/certs/ca-bundle.crt",   # RHEL/Fedora/CentOS
+      "/etc/ssl/ca-bundle.pem"              # Some other distros
+    ].find { |path| File.exist?(path) }
+  end
+end

lib/websocket_client.rb

@@ -0,0 +1,76 @@
+module W3DHubLauncher
+  class WebSocketClient
+    def initialize
+      @errored = nil
+      @connection = nil
+
+      @events = {
+        open: nil,
+        message: nil,
+        close: nil,
+        error: nil
+      }
+    end
+
+    def connect(endpoint, headers: nil, &block)
+      yield(self)
+
+      Sync do |task|
+        ssl_context = W3DHubLauncher.ca_bundle_path ? OpenSSL::SSL::SSLContext.new : nil
+        # ssl_context&.alpn_protocols = Async::HTTP::Protocol::HTTP11.names
+        ssl_context&.set_params(
+          ca_file: W3DHubLauncher.ca_bundle_path,
+          verify_mode: OpenSSL::SSL::VERIFY_PEER
+        )
+
+        # endpoint = Async::HTTP::Endpoint.parse(endpoint, alpn_protocols: Async::HTTP::Protocol::HTTP11.names, ssl_context: ssl_context)
+        endpoint = Async::HTTP::Endpoint.parse(endpoint, ssl_context: ssl_context)
+
+        Async::WebSocket::Client.connect(endpoint, headers: headers) do |connection|
+          @connection = connection
+
+          @events[:open]&.call
+
+          while message = connection.read
+            @events[:message].call(message)
+          end
+        # FIXME: Don't rescue for all ta errors?
+        rescue => error
+          @errored = true
+          @events[:error]&.call(error)
+        ensure
+          @events[:close]&.call unless @errored
+          @connection = nil
+          @errored = false
+        end
+      end
+
+      self
+    end
+
+    def on(event, &block)
+      raise "Event must be a symbol" unless event.is_a?(Symbol)
+      raise "Unknown event: #{event.inspect}" unless @events.keys.include?(event)
+      raise "No block given for #{event.inspect}" unless block_given?
+
+      @events[event] = block
+    end
+
+    def send(data, type: :text)
+      @connection&.write(data)
+      @connection&.flush
+    end
+
+    def close
+      @connection&.close
+    end
+
+    def open?
+      !closed?
+    end
+
+    def closed?
+      @connection&.closed?
+    end
+  end
+end