luci-base: extend xhr.js

Add timeout options to get() and post() and introduce XHR.stop() to support
stopping a poll operation.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

diff --git a/modules/luci-base/htdocs/luci-static/resources/xhr.js b/modules/luci-base/htdocs/luci-static/resources/xhr.js
index 3385f8f230ae5c1cb7edaeac17557cf054f5dbdf..91dcf3fefeb838246f6c1b5b5de0372e40f90408 100644 (file)
--- a/modules/luci-base/htdocs/luci-static/resources/xhr.js
+++ b/modules/luci-base/htdocs/luci-static/resources/xhr.js
@@ -39,7 +39,7 @@ XHR = function()
                        this._xmlHttp.abort();
        }
 
-       this.get = function(url,data,callback)
+       this.get = function(url,data,callback,timeout)
        {
                this.reinit();
 
@@ -54,6 +54,9 @@ XHR = function()
                        else
                                url += '?' + code;
 
+               if (!isNaN(timeout))
+                       xhr.timeout = timeout;
+
                xhr.open('GET', url, true);
 
                xhr.onreadystatechange = function()
@@ -76,7 +79,7 @@ XHR = function()
                xhr.send(null);
        }
 
-       this.post = function(url,data,callback)
+       this.post = function(url,data,callback,timeout)
        {
                this.reinit();
 
@@ -89,6 +92,9 @@ XHR = function()
                                callback(xhr);
                }
 
+               if (!isNaN(timeout))
+                       xhr.timeout = timeout;
+
                xhr.open('POST', url, true);
                xhr.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
                xhr.send(code);
@@ -168,7 +174,7 @@ XHR.get = function(url, data, callback)
        (new XHR()).get(url, data, callback);
 }
 
-XHR.poll = function(interval, url, data, callback)
+XHR.poll = function(interval, url, data, callback, post)
 {
        if (isNaN(interval) || interval < 1)
                interval = 5;
@@ -181,22 +187,38 @@ XHR.poll = function(interval, url, data, callback)
                        for (var i = 0, e = XHR._q[0]; i < XHR._q.length; e = XHR._q[++i])
                        {
                                if (!(XHR._t % e.interval) && !e.xhr.busy())
-                                       e.xhr.get(e.url, e.data, e.callback);
+                                       e.xhr[post ? 'post' : 'get'](e.url, e.data, e.callback, e.interval * 1000 - 5);
                        }
 
                        XHR._t++;
                };
        }
 
-       XHR._q.push({
+       var e = {
                interval: interval,
                callback: callback,
                url:      url,
                data:     data,
                xhr:      new XHR()
-       });
+       };
 
+       XHR._q.push(e);
        XHR.run();
+
+       return e;
+}
+
+XHR.stop = function(e)
+{
+       for (var i = 0; XHR._q && XHR._q[i]; i++) {
+               if (XHR._q[i] === e) {
+                       e.xhr.cancel();
+                       XHR._q.splice(i, 1);
+                       return true;
+               }
+       }
+
+       return false;
 }
 
 XHR.halt = function()