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Add websocket support #6

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Add websocket support #6

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58 changes: 40 additions & 18 deletions constants.go
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Original file line number Diff line number Diff line change
Expand Up @@ -5,25 +5,47 @@ const (
ADD = "ADD"
REMOVE = "REMOVE"
RELOAD_JS = `(function () {
var added = false;
function add_js () {
if(added) { return; }
var js = document.createElement('script');
js.src = "http://{{.}}/_d/polling";
var scripts = document.getElementsByTagName('script'),
s = scripts[scripts.length - 1];
s.parentNode.insertBefore(js, s);
if(window.console && console.log) {
console.log("http-watcher reload connected");
}
added = true;
}
var added = false;
function add_js () {
if(added) { return; }

if (window.WebSocket){
var sock = null;
var wsuri = "ws://{{.}}/ws";

sock = new WebSocket(wsuri);

sock.onopen = function() {
console.log("http-watcher reload connected, websocket");
}
sock.onclose = function() {
console.log("http-watcher reload disconnected, websocket");
}

sock.onmessage = function(e) {
setTimeout(function() {
location.reload(true);
}, parseFloat(e.data));
}
} else {
var js = document.createElement('script');
js.src = "http://{{.}}/_d/polling";
var scripts = document.getElementsByTagName('script'),
s = scripts[scripts.length - 1];
s.parentNode.insertBefore(js, s);
if(window.console && console.log) {
console.log("http-watcher reload connected");
}
}
added = true;
}

setTimeout(function(){
setTimeout(add_js, 600);
window.onload = add_js;
}, 600)
})();`

setTimeout(function(){
setTimeout(add_js, 600);
window.onload = add_js;
}, 600)
})();`
DIR_HTML = `<!doctype html>
<html>
<head>
Expand Down
24 changes: 23 additions & 1 deletion http-watcher.go
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Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,6 @@ import (
"bytes"
"flag"
"fmt"
"github.com/howeyc/fsnotify"
"io"
"log"
"mime"
Expand All @@ -21,6 +20,9 @@ import (
"sync"
"text/template"
"time"

"code.google.com/p/go.net/websocket"
"github.com/howeyc/fsnotify"
)

type Client struct {
Expand All @@ -39,6 +41,7 @@ type ReloadMux struct {
dirListTmpl *template.Template
docTmpl *template.Template
clients []Client
wsclients []*websocket.Conn
private bool
proxy int
monitor bool
Expand Down Expand Up @@ -287,6 +290,17 @@ func handler(w http.ResponseWriter, req *http.Request) {
}
}

func wshandler(ws *websocket.Conn) {
reloadCfg.mu.Lock()
reloadCfg.wsclients = append(reloadCfg.wsclients, ws)
reloadCfg.mu.Unlock()

// Wait until the client disconnects.
// We're not expecting the client to send real data to us
// so websocket.Read() can be used as a convenient way to block
ws.Read(nil)
}

func startMonitorFs() {
watcher, err := fsnotify.NewWatcher()
if err != nil {
Expand Down Expand Up @@ -346,6 +360,13 @@ func notifyBrowsers() {
c.buf.Flush()
}
reloadCfg.clients = make([]Client, 0)

for _, c := range reloadCfg.wsclients {
defer c.Close()
reload := fmt.Sprintf("%f*1000", reloadCfg.delay)
c.Write([]byte(reload))
}
reloadCfg.wsclients = make([]*websocket.Conn, 0)
}

// remove duplicate, and file name contains #
Expand Down Expand Up @@ -455,6 +476,7 @@ func main() {
go processFsEvents()
}
http.HandleFunc("/", handler)
http.Handle("/ws", websocket.Handler(wshandler))

int := ":" + strconv.Itoa(reloadCfg.port)
p := strconv.Itoa(reloadCfg.port)
Expand Down