woodpecker/shared/build/proxy/proxy.go

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2014-02-07 10:10:01 +00:00
package proxy
import (
"bytes"
"fmt"
)
// bash header
const header = "#!/bin/bash\n"
// this command string will check if the socat utility
// exists, and if it does, will proxy connections to
// the external IP address.
const command = "[ -x /usr/bin/socat ] && socat TCP-LISTEN:%s,fork TCP:%s:%s &\n"
// Proxy stores proxy configuration details mapping
// a local port to an external IP address with the
// same port number.
type Proxy map[string]string
func (p Proxy) Set(port, ip string) {
p[port] = ip
}
// String converts the proxy configuration details
// to a bash script.
func (p Proxy) String() string {
var buf bytes.Buffer
buf.WriteString(header)
for port, ip := range p {
buf.WriteString(fmt.Sprintf(command, port, ip, port))
}
return buf.String()
}
// Bytes converts the proxy configuration details
// to a bash script in byte array format.
func (p Proxy) Bytes() []byte {
return []byte(p.String())
}