Is There A Telnet Library For Javascript?

We have a network camera. It has an HTTP server to provides the current image. There is also a Telnet interface for controlling the camera (i.e. trigger, focus, etc.). I would l

Solution 1:

Thomaschaaf is correct, while HTML5 introduces websockets you'll find they still require special server support as they post HTTP style information upon opening the socket:

JS/HTML5 WebSocket: Connect without HTTP call

The best way, currently, to have true sockets is to either

• use a flash or Java component on the webpage that does the actual socket work.
• use a proxy server with websockets that can handle the additional protocol overhead of websockets and connect to the real tcp/ip port with plain sockets.

The jsterm example Matt linked does the latter, and if your webcans are behind a firewall it will not work in your situation without also implementing another server.

There are libraries that implement the first method, two are linked here for convenience, many others can be found using a search engine:

http://stephengware.com/proj/javasocketbridge/ (Java)

http://matthaynes.net/blog/2008/07/17/socketbridge-flash-javascript-socket-bridge/ (Flash)

Solution 2:

jsTerm is an HTML5 implementation of a Telnet client.

You'll need a browser that supports HTML5 WebSockets. WebSockets is the only method of doing non-HTTP requests with pure JavaScript.

Solution 3:

Currently there is no way to do socket connections with JavaScript only.

But what you are searching for is a socket connection ;)

https://developer.mozilla.org/en/XML_Extras

Solution 4:

If I interpret the question liberally as "is there a remote connectivity library for Javascript", then the answer is yes (quoting from https://xtermjs.org/):

• A web based SSH2 client using xterm.js, socket.io, and ssh2: https://github.com/billchurch/WebSSH2
• HTML5 Based SSHv2 Web Client with E2E encryption utilising xterm.js, SJCL & websockets: https://github.com/stuicey/SSHy

I've tried WebSSH2 with node.js briefly, it worked for me - I managed to connect to a Linux-based server with it.

(I know this probably doesn't help the OP but this is a 7-year old question anyway. Maybe it helps others who are needing an answer to a similar problem.)