ghostream/stream/telnet/handler.go

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package telnet
import (
"log"
"net"
"strings"
"time"
"gitlab.crans.org/nounous/ghostream/stream"
)
func handleViewer(s net.Conn, streams map[string]*stream.Stream, cfg *Options) {
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// Prompt user about stream name
if _, err := s.Write([]byte("[GHOSTREAM]\nEnter stream name: ")); err != nil {
log.Printf("Error while writing to TCP socket: %s", err)
s.Close()
return
}
buff := make([]byte, 255)
n, err := s.Read(buff)
if err != nil {
log.Printf("Error while requesting stream ID to telnet client: %s", err)
s.Close()
return
}
name := strings.TrimSpace(string(buff[:n])) + "@text"
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if len(name) < 1 {
// Too short, exit
s.Close()
return
}
// Wait a bit
time.Sleep(time.Second)
// Get requested stream
st, ok := streams[name]
if !ok {
log.Println("Stream does not exist, kicking new Telnet viewer")
if _, err := s.Write([]byte("This stream is inactive.\n")); err != nil {
log.Printf("Error while writing to TCP socket: %s", err)
}
s.Close()
return
}
// Register new client
log.Printf("New Telnet viewer for stream '%s'", name)
c := make(chan []byte, 128)
st.Register(c)
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st.IncrementClientCount()
// Hide terminal cursor
if _, err = s.Write([]byte("\033[?25l")); err != nil {
log.Printf("Error while writing to TCP socket: %s", err)
s.Close()
return
}
// Receive data and send them
for data := range c {
if len(data) < 1 {
log.Print("Remove Telnet viewer because of end of stream")
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break
}
// Send data
_, err := s.Write(data)
if err != nil {
log.Printf("Remove Telnet viewer because of sending error, %s", err)
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break
}
}
// Close output
st.Unregister(c)
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st.DecrementClientCount()
s.Close()
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}