73 lines
2.0 KiB
Go
73 lines
2.0 KiB
Go
// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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package tsnet_test
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import (
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"flag"
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"fmt"
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"html"
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"log"
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"net/http"
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"strings"
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"tailscale.com/tsnet"
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)
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func firstLabel(s string) string {
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s, _, _ = strings.Cut(s, ".")
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return s
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}
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// Example_tshello is a full example on using tsnet. When you run this program it will print
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// an authentication link. Open it in your favorite web browser and add it to your tailnet
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// like any other machine. Open another terminal window and try to ping it:
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//
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// $ ping tshello -c 2
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// PING tshello (100.105.183.159) 56(84) bytes of data.
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// 64 bytes from tshello.your-tailnet.ts.net (100.105.183.159): icmp_seq=1 ttl=64 time=25.0 ms
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// 64 bytes from tshello.your-tailnet.ts.net (100.105.183.159): icmp_seq=2 ttl=64 time=1.12 ms
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//
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// Then connect to it using curl:
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//
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// $ curl http://tshello
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// <html><body><h1>Hello, world!</h1>
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// <p>You are <b>Xe</b> from <b>pneuma</b> (100.78.40.86:49214)</p>
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//
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// From here you can do anything you want with the Go standard library HTTP stack, or anything
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// that is compatible with it (Gin/Gonic, Gorilla/mux, etc.).
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func Example_tshello() {
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var (
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addr = flag.String("addr", ":80", "address to listen on")
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hostname = flag.String("hostname", "tshello", "hostname to use on the tailnet")
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)
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flag.Parse()
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s := new(tsnet.Server)
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s.Hostname = *hostname
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defer s.Close()
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ln, err := s.Listen("tcp", *addr)
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if err != nil {
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log.Fatal(err)
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}
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defer ln.Close()
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lc, err := s.LocalClient()
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if err != nil {
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log.Fatal(err)
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}
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log.Fatal(http.Serve(ln, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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who, err := lc.WhoIs(r.Context(), r.RemoteAddr)
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if err != nil {
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http.Error(w, err.Error(), 500)
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return
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}
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fmt.Fprintf(w, "<html><body><h1>Hello, tailnet!</h1>\n")
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fmt.Fprintf(w, "<p>You are <b>%s</b> from <b>%s</b> (%s)</p>",
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html.EscapeString(who.UserProfile.LoginName),
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html.EscapeString(firstLabel(who.Node.ComputedName)),
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r.RemoteAddr)
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})))
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}
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