d0cf1d2882
WebSocket connections allow web-based clients to connect to IRC. This commit implements the WebSocket sub-protocol as specified by the pending IRCv3 proposal [1]. WebSocket listeners can now be set up via a "wss" protocol in the `listen` directive. The new `http-origin` directive allows the CORS allowed origins to be configured. [1]: https://github.com/ircv3/ircv3-specifications/pull/342
136 lines
2.6 KiB
Go
136 lines
2.6 KiB
Go
package soju
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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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"sync"
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"sync/atomic"
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"time"
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"gopkg.in/irc.v3"
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"nhooyr.io/websocket"
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)
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// TODO: make configurable
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var retryConnectMinDelay = time.Minute
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var connectTimeout = 15 * time.Second
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var writeTimeout = 10 * time.Second
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type Logger interface {
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Print(v ...interface{})
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Printf(format string, v ...interface{})
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}
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type prefixLogger struct {
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logger Logger
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prefix string
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}
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var _ Logger = (*prefixLogger)(nil)
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func (l *prefixLogger) Print(v ...interface{}) {
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v = append([]interface{}{l.prefix}, v...)
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l.logger.Print(v...)
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}
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func (l *prefixLogger) Printf(format string, v ...interface{}) {
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v = append([]interface{}{l.prefix}, v...)
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l.logger.Printf("%v"+format, v...)
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}
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type Server struct {
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Hostname string
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Logger Logger
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RingCap int
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HistoryLimit int
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LogPath string
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Debug bool
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HTTPOrigins []string
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db *DB
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lock sync.Mutex
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users map[string]*user
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}
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func NewServer(db *DB) *Server {
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return &Server{
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Logger: log.New(log.Writer(), "", log.LstdFlags),
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RingCap: 4096,
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HistoryLimit: 1000,
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users: make(map[string]*user),
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db: db,
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}
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}
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func (s *Server) prefix() *irc.Prefix {
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return &irc.Prefix{Name: s.Hostname}
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}
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func (s *Server) Run() error {
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users, err := s.db.ListUsers()
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if err != nil {
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return err
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}
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s.lock.Lock()
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for _, record := range users {
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s.Logger.Printf("starting bouncer for user %q", record.Username)
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u := newUser(s, &record)
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s.users[u.Username] = u
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go u.run()
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}
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s.lock.Unlock()
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select {}
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}
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func (s *Server) getUser(name string) *user {
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s.lock.Lock()
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u := s.users[name]
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s.lock.Unlock()
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return u
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}
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var lastDownstreamID uint64 = 0
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func (s *Server) handle(ic ircConn, remoteAddr string) {
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id := atomic.AddUint64(&lastDownstreamID, 1)
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dc := newDownstreamConn(s, ic, remoteAddr, id)
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if err := dc.runUntilRegistered(); err != nil {
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dc.logger.Print(err)
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} else {
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dc.user.events <- eventDownstreamConnected{dc}
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if err := dc.readMessages(dc.user.events); err != nil {
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dc.logger.Print(err)
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}
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dc.user.events <- eventDownstreamDisconnected{dc}
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}
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dc.Close()
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}
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func (s *Server) Serve(ln net.Listener) error {
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for {
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conn, err := ln.Accept()
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if err != nil {
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return fmt.Errorf("failed to accept connection: %v", err)
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}
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go s.handle(newNetIRCConn(conn), conn.RemoteAddr().String())
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}
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}
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func (s *Server) ServeHTTP(w http.ResponseWriter, req *http.Request) {
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conn, err := websocket.Accept(w, req, &websocket.AcceptOptions{
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OriginPatterns: s.HTTPOrigins,
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})
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if err != nil {
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s.Logger.Printf("failed to serve HTTP connection: %v", err)
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return
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}
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s.handle(newWebsocketIRCConn(conn), req.RemoteAddr)
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}
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