| 1 | package bsshchat |
| 2 | |
| 3 | import ( |
| 4 | "bufio" |
| 5 | "io" |
| 6 | "strings" |
| 7 | |
| 8 | "github.com/matterbridge-org/matterbridge/bridge" |
| 9 | "github.com/matterbridge-org/matterbridge/bridge/config" |
| 10 | "github.com/matterbridge-org/matterbridge/bridge/helper" |
| 11 | "github.com/shazow/ssh-chat/sshd" |
| 12 | ) |
| 13 | |
| 14 | type Bsshchat struct { |
| 15 | r *bufio.Scanner |
| 16 | w io.WriteCloser |
| 17 | *bridge.Config |
| 18 | } |
| 19 | |
| 20 | func New(cfg *bridge.Config) bridge.Bridger { |
| 21 | return &Bsshchat{Config: cfg} |
| 22 | } |
| 23 | |
| 24 | func (b *Bsshchat) Connect() error { |
| 25 | b.Log.Infof("Connecting %s", b.GetString("Server")) |
| 26 | |
| 27 | // connHandler will be called by 'sshd.ConnectShell()' below |
| 28 | // once the connection is established in order to handle it. |
| 29 | connErr := make(chan error, 1) // Needs to be buffered. |
| 30 | connSignal := make(chan struct{}) |
| 31 | connHandler := func(r io.Reader, w io.WriteCloser) error { |
| 32 | b.r = bufio.NewScanner(r) |
| 33 | b.r.Scan() |
| 34 | b.w = w |
| 35 | if _, err := b.w.Write([]byte("/theme mono\r\n/quiet\r\n")); err != nil { |
| 36 | return err |
| 37 | } |
| 38 | close(connSignal) // Connection is established so we can signal the success. |
| 39 | return b.handleSSHChat() |
| 40 | } |
| 41 | |
| 42 | go func() { |
| 43 | // As a successful connection will result in this returning after the Connection |
| 44 | // method has already returned point we NEED to have a buffered channel to still |
| 45 | // be able to write. |
| 46 | connErr <- sshd.ConnectShell(b.GetString("Server"), b.GetString("Nick"), connHandler) |
| 47 | }() |
| 48 | |
| 49 | select { |
| 50 | case err := <-connErr: |
| 51 | b.Log.Error("Connection failed") |
| 52 | return err |
| 53 | case <-connSignal: |
| 54 | } |
| 55 | b.Log.Info("Connection succeeded") |
| 56 | return nil |
| 57 | } |
| 58 | |
| 59 | func (b *Bsshchat) Disconnect() error { |
| 60 | return nil |
| 61 | } |
| 62 | |
| 63 | func (b *Bsshchat) JoinChannel(channel config.ChannelInfo) error { |
| 64 | return nil |
| 65 | } |
| 66 | |
| 67 | func (b *Bsshchat) Send(msg config.Message) (string, error) { |
| 68 | // ignore delete messages |
| 69 | if msg.Event == config.EventMsgDelete { |
| 70 | return "", nil |
| 71 | } |
| 72 | b.Log.Debugf("=> Receiving %#v", msg) |
| 73 | if msg.Extra != nil { |
| 74 | for _, rmsg := range helper.HandleExtra(&msg, b.General) { |
| 75 | if _, err := b.w.Write([]byte(rmsg.Username + rmsg.Text + "\r\n")); err != nil { |
| 76 | b.Log.Errorf("Could not send extra message: %#v", err) |
| 77 | } |
| 78 | } |
| 79 | if len(msg.Extra["file"]) > 0 { |
| 80 | return b.handleUploadFile(&msg) |
| 81 | } |
| 82 | } |
| 83 | _, err := b.w.Write([]byte(msg.Username + msg.Text + "\r\n")) |
| 84 | return "", err |
| 85 | } |
| 86 | |
| 87 | /* |
| 88 | func (b *Bsshchat) sshchatKeepAlive() chan bool { |
| 89 | done := make(chan bool) |
| 90 | go func() { |
| 91 | ticker := time.NewTicker(90 * time.Second) |
| 92 | defer ticker.Stop() |
| 93 | for { |
| 94 | select { |
| 95 | case <-ticker.C: |
| 96 | b.Log.Debugf("PING") |
| 97 | err := b.xc.PingC2S("", "") |
| 98 | if err != nil { |
| 99 | b.Log.Debugf("PING failed %#v", err) |
| 100 | } |
| 101 | case <-done: |
| 102 | return |
| 103 | } |
| 104 | } |
| 105 | }() |
| 106 | return done |
| 107 | } |
| 108 | */ |
| 109 | |
| 110 | func stripPrompt(s string) string { |
| 111 | pos := strings.LastIndex(s, "\033[K") |
| 112 | if pos < 0 { |
| 113 | return s |
| 114 | } |
| 115 | return s[pos+3:] |
| 116 | } |
| 117 | |
| 118 | func (b *Bsshchat) handleSSHChat() error { |
| 119 | /* |
| 120 | done := b.sshchatKeepAlive() |
| 121 | defer close(done) |
| 122 | */ |
| 123 | wait := true |
| 124 | for { |
| 125 | if b.r.Scan() { |
| 126 | // ignore messages from ourselves |
| 127 | if !strings.Contains(b.r.Text(), "\033[K") { |
| 128 | continue |
| 129 | } |
| 130 | if strings.Contains(b.r.Text(), "Rate limiting is in effect") { |
| 131 | continue |
| 132 | } |
| 133 | // skip our own messages |
| 134 | if !strings.HasPrefix(b.r.Text(), "["+b.GetString("Nick")+"] \x1b") { |
| 135 | continue |
| 136 | } |
| 137 | res := strings.Split(stripPrompt(b.r.Text()), ":") |
| 138 | if res[0] == "-> Set theme" { |
| 139 | wait = false |
| 140 | b.Log.Debugf("mono found, allowing") |
| 141 | continue |
| 142 | } |
| 143 | if !wait { |
| 144 | b.Log.Debugf("<= Message %#v", res) |
| 145 | rmsg := config.Message{Username: res[0], Text: strings.TrimSpace(strings.Join(res[1:], ":")), Channel: "sshchat", Account: b.Account, UserID: "nick"} |
| 146 | b.Remote <- rmsg |
| 147 | } |
| 148 | } |
| 149 | } |
| 150 | } |
| 151 | |
| 152 | func (b *Bsshchat) handleUploadFile(msg *config.Message) (string, error) { |
| 153 | for _, f := range msg.Extra["file"] { |
| 154 | fi := f.(config.FileInfo) |
| 155 | if fi.Comment != "" { |
| 156 | msg.Text += fi.Comment + ": " |
| 157 | } |
| 158 | if fi.URL != "" { |
| 159 | msg.Text = fi.URL |
| 160 | if fi.Comment != "" { |
| 161 | msg.Text = fi.Comment + ": " + fi.URL |
| 162 | } |
| 163 | } |
| 164 | if _, err := b.w.Write([]byte(msg.Username + msg.Text + "\r\n")); err != nil { |
| 165 | b.Log.Errorf("Could not send file message: %#v", err) |
| 166 | } |
| 167 | } |
| 168 | return "", nil |
| 169 | } |
| 170 | |
