screenshare

screenshare

what

screenshare images to a web browser.

why

ttyd isn't always enough.

implementations

two identical implementations are maintained:

• python: pypy3 + maim
• go: go

how

install and run screenshare on your laptop:

>> go build

>> ./screenshare -h
Usage of ./screenshare:
  -a string
        auth: http://localhost:8080?auth=AUTH
  -d int
        display number (default 1)
  -m int
        millis per frame (default 30)
  -p int
        port (default 8080)

on ec2 or any server with a public ip and dns pointing at it, run a reverse proxy to terminate ssl and cache all but a single request to your laptop per millis interval:

>> cat Caddyfile
{
    order http_cache before reverse_proxy
}

screenshare.example.com  {

    reverse_proxy {
        to localhost:8080
    }

    http_cache {
        cache_type in_memory
        match_path /
        default_max_age 30ms
    }
}

>> go get -u github.com/caddyserver/xcaddy/cmd/xcaddy

>> xcaddy build v2.2.1 --with github.com/sillygod/cdp-cache

>> sudo ./caddy run

forward 8080 to that server:

>> ssh $user@server 'echo "GatewayPorts yes" | sudo tee -a /etc/ssh/sshd_config && sudo systemctl restart sshd'

>> ssh -R 8080:0.0.0.0:8080 $user@$server

send people the link:

https://screenshare.example.com?auth=LOTS_OF_RANDOM_CHARACTERS