The HTTP2 module in Node.js provides support for the HTTP/2 protocol, enabling faster and more efficient communication between clients and servers.
- The HTTP2 module is a built-in module used to implement the HTTP/2 protocol in Node.js.
- It improves performance through features like multiplexing, header compression, and server push.
- It allows developers to create HTTP/2 servers and manage client–server communication efficiently.
Output:
Server running at http://localhost:8000
Status: 200
Received: Hello Session protocol: h2c
Client destroyed
Session is closed
Classes in the Node.js HTTP2 Module
1. Class: Http2Session
Represents an HTTP/2 session that manages communication between peers.
Events
- timeout: This event in Http2Session occurs when there is no activity for a specified time.
- close: This event in Http2Session is emitted when the session is destroyed.
Methods
- state(): This method of Http2Session returns the current session state.
- socket(): This method of Http2Session returns the associated socket.
- remoteSettings(): This method of Http2Session returns remote session settings.
- destroyed(): This method of Http2Session checks if the session is destroyed.
- type():This method of Http2Session returns the session type.
- encrypted(): This method of Http2Session checks if the session uses TLS.
- localSettings(): This method of Http2Session returns local settings.
- pendingSettingsAck(): This method of Http2Session checks for SETTINGS acknowledgment.
- close(): This method of Http2Session closes the session.
- closed(): This method of Http2Session checks if the session is closed.
- alpnProtocol(): This method of Http2Session returns the ALPN protocol used.
- unref(): This method of Http2Session returns the associated socket instance.
- destroy(): This method of Http2Session destroys the session.
- connecting(): This method of Http2Session checks if the session is connecting.
- ping(): This method of Http2Session sends a PING frame.
- setTimeout(): This method of Http2Session sets a session timeout.
2. Class: ClientHttp2Session
ClientHttp2Session represents an HTTP/2 client session.
Methods
- request(): The method of ClientHttp2Session returns a ClientHttp2Stream object.
3. Class: Http2Stream
Http2Stream represents an HTTP/2 stream for request–response communication.
Events
- timeout: The event in Http2Stream occurs when the stream is inactive.
- close: The event in Http2Stream is emitted when the stream is destroyed.
Methods
- state(): This method of Http2Stream returns the stream state.
- priority(): This method of Http2Stream updates the stream priority.
- setTimeout(): This method of Http2Stream sets a stream timeout.
- id(): This method of Http2Stream returns the stream identifier.
- closed(): This method of Http2Stream checks if the stream is closed.
- endAfterHeaders(): This method of Http2Stream checks if the END_STREAM flag is set.
- pending(): This method of Http2Stream checks if the stream identifier is assigned.
- destroyed(): This method of Http2Stream checks if the stream is destroyed.
- session(): This method of Http2Stream returns the associated Http2Session.
- close(): This method of Http2Stream closes the stream.
- rstCode(): This method of Http2Stream returns the RST_STREAM error code.
- sentHeaders(): This method of Http2Stream returns sent headers.
- sentInfoHeaders(): This method of Http2Stream returns informational headers.
4. Class: ServerHttp2Stream
ServerHttp2Stream represents an HTTP/2 stream on the server side.
Methods
- additionalHeaders(): The additionalHeaders() method of ServerHttp2Stream sends extra headers.
- headersSent(): The headersSent() method of ServerHttp2Stream checks if headers are sent.
- pushAllowed(): The pushAllowed() method of ServerHttp2Stream checks if server push is allowed.
- respond(): The respond() method of ServerHttp2Stream sends response headers.
5. Class: http2.Http2ServerRequest
Http2ServerRequest represents the incoming HTTP/2 request.
Properties
- aborted: The property of Http2ServerRequest indicates if the request is aborted.
Events
- close: The event in Http2ServerRequest occurs when the underlying stream closes.
Methods
- url(): The method of Http2ServerRequest returns the request URL.
- httpVersion(): The method of Http2ServerRequest returns the HTTP version.
- headers(): The method of Http2ServerRequest returns request headers.
- rawHeaders(): The method of Http2ServerRequest returns raw headers.
- destroy(): The method of Http2ServerRequest destroys the request.
- authority(): This method of Http2ServerRequest returns the request authority.
- complete(): This method of Http2ServerRequest checks request completion.
- method(): The method of Http2ServerRequest returns the request method.
- scheme(): The method of Http2ServerRequest returns the request scheme.
- rawTrailers(): The method of Http2ServerRequest returns trailer headers.
- socket(): The method of Http2ServerRequest returns a proxy socket object.
6. Class: http2.Http2ServerResponse
Http2ServerResponse represents the outgoing HTTP/2 response.
Properties
- headersSent: The property of Http2ServerResponse indicates if headers were sent.
Events
- close: The event in Http2ServerResponse occurs when the stream closes.
- finish: The event in Http2ServerResponse occurs when the response is fully sent.
Methods
- setHeader(): The method of Http2ServerResponse sets a response header.
- setTimeout(): The method of Http2ServerResponse sets a response timeout.
- stream(): The method of Http2ServerResponse returns the HTTP stream.
- statusMessage(): The method of Http2ServerResponse returns an empty string in HTTP/2.
- writableEnded(): The method of Http2ServerResponse checks if response.end() was called.
- write(): The method of Http2ServerResponse sends response data.
- writeHead(): The method of Http2ServerResponse sends response headers.
- sendDate(): The method of Http2ServerResponse checks automatic Date header generation.
- socket(): The method of Http2ServerResponse returns a proxy socket.
- statusCode(): The method of Http2ServerResponse returns the response status code.
- getHeaderNames(): The method of Http2ServerResponse returns header names.
- removeHeader(): The method of Http2ServerResponse removes a header.
- hasHeader(): The method of Http2ServerResponse checks if a header exists.
- getHeaders(): The method of Http2ServerResponse returns outgoing headers.
- end(): The method of Http2ServerResponse completes the response.
- finished(): The method of Http2ServerResponse checks response completion.
- getHeader(): The method of Http2ServerResponse returns a queued header.
http2.constants
The http2.constants object provides predefined constants used in HTTP/2 operations.
Properties
- constants: The property of http2.constants provides HTTP/2 error codes.
HTTP2 Module Methods
The Node.js HTTP2 module provides several classes that manage HTTP/2 sessions, streams, requests, and responses for efficient client–server communication.
