"The WebSocket protocol enables interaction between a web browser (or other client application) and a web server with lower overhead than half-duplex alternatives such as HTTP polling, facilitating real-time data transfer from and to the server."
Websockets allow for real-time, bidirectional communication between servers and clients. Learning how to use websockets with Rickshaw can add new functionality to an application in areas such as live chat, notifications, and real-time data feeds.
Websockets: A protocol that enables the creation of a two-way channel between a server and a client.
Client-side libraries: Libraries that allow the client to communicate with the server using Websockets.
Server-side libraries: Libraries that allow the server to communicate with the client using Websockets.
Real-time communication: The ability to send and receive data in real-time between a server and a client using Websockets.
Data visualization: The ability to display data in a meaningful way using charts, graphs, and other visual aids.
D3.js: A powerful JavaScript library for data visualization that is often used in conjunction with Websockets.
Rickshaw: A JavaScript library for creating interactive real-time charts using D3.js and Websockets.
Websocket protocols: The different protocols used by Websockets, including WebSocket, WAMP, and Socket.io.
JSON: A data format used for exchanging data between a server and a client using Websockets.
Security: The measures taken to secure data transmitted over a Websocket connection, including encryption, authentication, and access control.
Socket.IO: A library for real-time, bi-directional communication between web clients and servers. Socket.IO provides a WebSocket interface and modules for multiplexing, pub-sub, and broadcasting.
SockJS: A client-side JavaScript library that provides a WebSocket-like interface, along with fallback protocols like polling, streaming, and iframe. SockJS aims to provide reliable, low-latency real-time communication over the web.
SignalR: A library for real-time, bi-directional communication between web clients and servers. SignalR provides a WebSocket interface, along with modules for broadcasting, scaling, and load balancing.
Pusher: A cloud-based messaging service that provides a WebSocket interface, along with modules for pub-sub, broadcasting, and presence detection. Pusher aims to make real-time communication over the web accessible to both developers and enterprises.
"The WebSocket protocol was standardized by the IETF as RFC 6455 in 2011."
"It is a living standard maintained by the WHATWG and a successor to The WebSocket API from the W3C."
"WebSocket is distinct from HTTP. Both protocols are located at layer 7 in the OSI model and depend on TCP at layer 4."
"To achieve compatibility, the WebSocket handshake uses the HTTP Upgrade header to change from the HTTP protocol to the WebSocket protocol."
"Facilitating real-time data transfer from and to the server."
"The communications are usually done over TCP port number 443 (or 80 in the case of unsecured connections), which is beneficial for environments that block non-web Internet connections using a firewall."
"Most browsers support the protocol, including Google Chrome, Firefox, Microsoft Edge, Internet Explorer, Safari, and Opera."
"Additionally, WebSocket enables streams of messages on top of TCP."
"TCP alone deals with streams of bytes with no inherent concept of a message."
"Similar two-way browser–server communications have been achieved in non-standardized ways using stopgap technologies such as Comet or Adobe Flash Player."
"Using browser developer tools, developers can inspect the WebSocket handshake as well as the WebSocket frames."
"The WebSocket protocol specification defines ws (WebSocket) and wss (WebSocket Secure) as two new uniform resource identifier (URI) schemes that are used for unencrypted and encrypted connections respectively."
"The WebSocket protocol aims to solve these problems without compromising the security assumptions of the web."
"Before WebSocket, port 80 full-duplex communication was attainable using Comet channels; however, Comet implementation is nontrivial, and due to the TCP handshake and HTTP header overhead, it is inefficient for small messages."
"a two-way ongoing conversation can take place between the client and the server... allowing messages to be passed back and forth while keeping the connection open."
"Unlike HTTP, WebSocket provides full-duplex communication."
"WebSocket is distinct from HTTP... providing full-duplex communication channels over a single TCP connection... with lower overhead than half-duplex alternatives such as HTTP polling."
"The WebSocket protocol was standardized by the IETF as RFC 6455 in 2011."
"The WebSocket protocol was standardized by the IETF as RFC 6455 in 2011."