71 lines
1.6 KiB
Go
71 lines
1.6 KiB
Go
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// Program wshttp demonstrates how to set up a JSON-RPC 20 server using
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// the github.com/creachadair/jrpc2 package with a Websocket transport.
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//
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// Usage:
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// go build github.com/creachadair/jrpc2/tools/examples/wshttp
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// ./wshttp -listen :8080
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//
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// The server accepts RPC connections on ws://<address>/rpc.
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package main
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import (
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"context"
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"flag"
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"log"
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"net/http"
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"github.com/creachadair/jrpc2"
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"github.com/creachadair/jrpc2/channel"
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"github.com/creachadair/jrpc2/handler"
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"github.com/creachadair/jrpc2/server"
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"github.com/creachadair/wschannel"
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)
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var listenAddr = flag.String("listen", "", "Service address")
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func main() {
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flag.Parse()
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if *listenAddr == "" {
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log.Fatal("You must provide a non-empty -listen address")
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}
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lst := wschannel.NewListener(nil)
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hs := &http.Server{Addr: *listenAddr, Handler: http.DefaultServeMux}
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http.Handle("/rpc", lst)
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go hs.ListenAndServe()
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acc := accepter{
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Listener: lst,
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ctx: context.Background(),
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}
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svc := handler.Map{"Reverse": handler.New(reverse)}
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log.Printf("Listing at ws://%s/rpc", *listenAddr)
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err := server.Loop(acc, server.Static(svc), &server.LoopOptions{
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ServerOptions: &jrpc2.ServerOptions{
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Logger: jrpc2.StdLogger(nil),
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},
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})
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hs.Shutdown(acc.ctx)
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if err != nil {
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log.Fatalf("Loop exited: %v", err)
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}
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}
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func reverse(_ context.Context, ss []string) []string {
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for i, j := 0, len(ss)-1; i < j; i++ {
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ss[i], ss[j] = ss[j], ss[i]
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j--
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}
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return ss
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}
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type accepter struct {
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*wschannel.Listener
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ctx context.Context
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}
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func (a accepter) Accept() (channel.Channel, error) {
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return a.Listener.Accept(a.ctx)
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}
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