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Try to open port before allowing it

mine
Joscha Alisch 2020-02-07 19:41:14 +01:00
parent b544852ec7
commit 768d5c9d93
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GPG Key ID: FCADD70C266FEEB5
1 changed files with 15 additions and 0 deletions
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15
internal/view/container.go
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@ -3,6 +3,7 @@ package view
import ( import (
"errors" "errors"
"fmt" "fmt"
"net"
"strings" "strings"
"github.com/derailed/k9s/internal/client" "github.com/derailed/k9s/internal/client"
@ -157,6 +158,12 @@ func (c *Container) preparePort(pp []string) string {
} }
func (c *Container) portForward(address, lport, cport string) { func (c *Container) portForward(address, lport, cport string) {
err := tryListenPort(lport)
if err != nil {
c.App().Flash().Err(err)
return
}
co := c.GetTable().GetSelectedCell(0) co := c.GetTable().GetSelectedCell(0)
pf := dao.NewPortForwarder(c.App().Conn()) pf := dao.NewPortForwarder(c.App().Conn())
ports := []string{lport + ":" + cport} ports := []string{lport + ":" + cport}
@ -187,3 +194,11 @@ func (c *Container) runForward(pf *dao.PortForwarder, f *portforward.PortForward
pf.SetActive(false) pf.SetActive(false)
}) })
} }
func tryListenPort(port string) error {
server, err := net.Listen("tcp", fmt.Sprintf(":%s", port))
if err != nil {
return err
}
return server.Close()
}