62 lines
1.2 KiB
Go
62 lines
1.2 KiB
Go
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package cmd
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import (
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"fmt"
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"log"
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"net"
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"net/http"
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"github.com/spf13/cobra"
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)
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var ServerCmd = &cobra.Command{
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Use: "serve",
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Short: "Simple server that returns the resolved IP.",
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Run: func(cmd *cobra.Command, args []string) {
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StartServer()
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},
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}
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var (
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// declared in client
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// port string
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addr string
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)
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func init() {
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ServerCmd.Flags().StringVarP(&port, "port", "p", "5080", "server port to listen")
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ServerCmd.Flags().StringVarP(&addr, "address", "b", "0.0.0.0", "address the server binds on")
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}
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func StartServer() error {
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http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
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ip := r.Header.Get("X-Real-Ip")
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if ip == "" {
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ip = r.Header.Get("X-Forwarded-For")
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}
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if ip == "" {
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var err error
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ip, _, err = net.SplitHostPort(r.RemoteAddr)
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if err != nil {
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ip = r.RemoteAddr
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}
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}
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fmt.Fprint(w, ip+"\n")
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})
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err := http.ListenAndServe(addr+":"+port, simpleLogger(http.DefaultServeMux))
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if err != nil {
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log.Println(err)
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return err
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}
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return nil
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}
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func simpleLogger(handler http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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log.Printf("%s %s %s\n", r.RemoteAddr, r.Method, r.URL)
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handler.ServeHTTP(w, r)
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})
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}
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