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The WebSocket protocol is implemented in different web browsers, web servers, and run-time environments and libraries acting as clients or servers. The following is a table of different features of notable WebSocket implementations.
Firefox added support for HTTP/3 in November 2019 through a feature flag [7] [16] [17] and started enabling it by default in April 2021 in Firefox 88. [ 7 ] [ 10 ] Experimental support for HTTP/3 was added to Safari Technology Preview on April 8, 2020 [ 18 ] and was included with Safari 14 that ships with iOS 14 and macOS 11 , [ 11 ] [ 19 ] but ...
To achieve compatibility, the WebSocket handshake uses the HTTP Upgrade header [3] to change from the HTTP protocol to the WebSocket protocol. The WebSocket protocol enables full-duplex interaction between a web browser (or other client application) and a web server with lower overhead than half-duplex alternatives such as HTTP polling ...
WAMP is a WebSocket subprotocol registered at IANA, [1] specified [2] to offer routed RPC and PubSub. Its design goal [ 3 ] is to provide an open standard for soft, real-time message exchange between application components and ease the creation of loosely coupled architectures based on microservices .
The first change is to greatly reduce overhead during connection setup. As most HTTP connections will demand TLS, QUIC makes the exchange of setup keys and listing of supported protocols part of the initial handshake process. When a client opens a connection, the response packet includes the data needed for future packets to use encryption.
Mainly used to identify Ajax requests (most JavaScript frameworks send this field with value of XMLHttpRequest); also identifies Android apps using WebView [23] X-Requested-With: XMLHttpRequest: DNT [24] Requests a web application to disable their tracking of a user. This is Mozilla's version of the X-Do-Not-Track header field (since Firefox 4. ...
Mozilla Firefox (Firefox for mobile) [n 17] 1.0, 1.5 Windows (10+) macOS (10.15+) Linux Android (5.0+) iOS (15+) Firefox OS Maemo ESR 115 only for: Windows (7–8.1) macOS (10.12–10.14) ESR 128+ only for: Windows (10+) macOS (10.15+) Linux: Yes [30] Yes [30] Yes [30] No No No No Yes [2] No Not affected [31] Not affected Vulnerable Vulnerable ...
[12] [13] In October 2011, the W3C published its first draft for the spec. [14] WebRTC milestones include the first cross-browser video call (February 2013), first cross-browser data transfers (February 2014), and as of July 2014 Google Hangouts was "kind of" using WebRTC. [15] The W3C draft API was based on preliminary work done in the WHATWG ...