libwebsockets: 30fps realtime canvas	test apps communicate in realtime between browsers

libwebsockets

Libwebsockets is a lightweight pure C library built to use minimal CPU and memory resources, and provide fast throughput in both directions.

• Latest Release 1.2: see changelog... ​http://git.libwebsockets.org/cgi-bin/cgit/libwebsockets/tree/changelog?id=v1.2-chrome26-firefox18

• Provides server and client APIs for v13 websocket protocol, along with http[s] serving

• Can be configured to use OpenSSL or CyaSSL to provide fully encrypted client and server links including client certificate support

• It's a full autotools and optionally CMake based project that has been used in a variety of OS contexts including Linux (uclibc and glibc), ARM-based embedded boards, MIPS / OpenWRT, Windows, Android, Apple iOS and even Tivo.

• It includes a stub webserver that is enough to deliver your scripts to the browser that open websocket connections back to the same server, so it can solve the entire server side, ws://, wss://, ​http:// and ​https:// in one step. Apache, Java or any other server-side support is not needed.

• Chrome 26 and Firefox 18 are supported, including the webkit websocket compression extension.

• Architectural features like zero-copy for payload data and FSM-based protocol parsers make it ideal for realtime operation on resource-constrained devices

• Websocket + HTTP serving for ARM: code + data + bss combined is under 15K, plus 12K at init to support up to 1024 fds, and 112 bytes per connection... minimal single client case in < 35KBytes total including library footprint

• Valgrind-clean, reliable and robust

• It's licensed under LGPL2 + static link exception and comes with test servers that demonstrate client and server communication between the test apps and a test browser applet.

Getting the sources

You can get the latest sources from git

git clone git://git.libwebsockets.org/libwebsockets

or browse the git repo at ​http://git.libwebsockets.org/cgi-bin/cgit/libwebsockets/

Documentation

• Build and configuration (in git tree): ​http://git.libwebsockets.org/cgi-bin/cgit/libwebsockets/tree/README.build

• Test App usage and features: ​http://git.libwebsockets.org/cgi-bin/cgit/libwebsockets/tree/README.test-apps

• Coding apps using the library: ​http://git.libwebsockets.org/cgi-bin/cgit/libwebsockets/tree/README.coding

• HTML API reference (in git tree, generated from code): http://libwebsockets.org/libwebsockets-api-doc.html

• What does a complete HTML + Websockets server look like using libwebsockets? ​http://git.libwebsockets.org/cgi-bin/cgit/libwebsockets/tree/test-server/test-server.c

Support

• Register at Trac here http://libwebsockets.org/trac/register

• Register for the libwebsockets mailing list ​http://ml.libwebsockets.org/mailman/listinfo/libwebsockets