Upgrade Header Document For Free

The HTTP Upgrade mechanism is used to establish HTTP/2 starting from plain HTTP. The client starts an HTTP/1.1 connection and sends an Upgrade: h2c header. If the server supports HTTP/2, it replies with HTTP 101 Switching Protocol status code. The HTTP Upgrade mechanism is used only for cleartext HTTP2 (h2c).

Configure Apache to Support HTTP/2 Disable the mpm_prefork module, which is not compatible with HTTP/2. ... Enable the mpm_event module. ... Enable the ssl module. ... Enable the http2 module to activate HTTP/2 support. ... Restart Apache to apply all the changes. ... Verify Apache is still active using the systemctl status command.

Implement HTTP/2 in Nginx As I mentioned above, HTTP/2 is supported only over HTTPS, so you got to add under server block which has SSL configuration. If your SSL configuration is in a file other nginx. conf, you must update it there. Once done, restart the Nginx for configuration to be active.

Other headers may be required depending on the requested protocol; for example, WebSocket upgrades allow additional headers to configure details about the WebSocket connection as well as to offer a degree of security in opening the connection.

Today, all popular browsers already support HTTP/2 technology. In order for your site to load via this protocol, no special changes need to be made. Make sure that SSL certificate is already installed on your site and ask your hosting provider if your server supports the updated HTTP protocol.

The HTTP 1.1 (only) Upgrade header can be used to upgrade an already established client/server connection to a different protocol (over the same transport protocol). For example, it can be used by a client to upgrade a connection from HTTP 1.1 to HTTP 2.0, or an HTTP or HTTPS connection into a WebSocket.

The HTTP HTTP2-Settings request header is required when the client is requesting a HTTP connection upgrade from HTTP/1.1 to HTTP/2. It includes parameters that govern the HTTP/2 connection, if the upgrade request is successful.