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-rw-r--r--itjs/loader.js177
1 files changed, 21 insertions, 156 deletions
diff --git a/itjs/loader.js b/itjs/loader.js
index 90edf1e..9fdb9a8 100644
--- a/itjs/loader.js
+++ b/itjs/loader.js
@@ -1,16 +1,15 @@
/**
* Create loader to request data from server
+ * Uses it_http class for communication
*
* @param handler Object providing clear()/render() function when data arrives
*/
function it_loader(handler)
{
/* Clear cache etc. if completely new data */
- this.req = null;
+ this.http = null;
this.handler = handler;
- this.instance = it_loader.instances++;
- this.callid = 0;
- this.scrpt = [];
+ this.callback = { object:this, method:'dataReady', errorhandler:'onerror' };
this.clear();
}
@@ -25,8 +24,6 @@ clear: function()
this.entry = new Array();
this.start = this.end = 0;
this.attr = { num: 0, loadtime: 0 };
- this.method = "GET";
- this.post_data = null;
if (this.handler.clear)
this.handler.clear();
@@ -65,80 +62,9 @@ load: function(baseurl, pos, num, query_volatile, retry)
if (num > 0)
{
- this.req = null;
- var samehost = (baseurl.indexOf('http://') < 0 || baseurl.indexOf(window.location.hostname) > 0);
-
- if (retry)
- baseurl += (baseurl.match(/\?/) ? "&" : "?") + "retry=" + retry;
-
- if (samehost) // use XMLHTTP request only if on same host
- {
- try
- {
- this.req = new XMLHttpRequest();
- }
- catch (e)
- {
- var classnames = [ 'MSXML2.XMLHTTP', 'Microsoft.XMLHTTP' ];
-
- for (var i in classnames)
- {
- try
- {
- this.req = new ActiveXObject(classnames[i]);
- break;
- }
- catch (e) { }
- }
- }
-
- try
- {
- this.req.open(this.method, baseurl + (baseurl.match(/\?/) ? "&" : "?") + "pos=" + pos + "&num=" + num + (query_volatile ? query_volatile : ""));
- var me = this;
- this.req.onreadystatechange = function() { me.readyStateChanged(); }
- var workingxmlhttp = this.req.onreadystatechange;
-
- if (!workingxmlhttp) /* Old Konqueror */
- this.req = null;
- }
- catch (e) { }
- }
-
- this.starttime = new Date().getTime();
this.retry = retry;
-
- if (this.req)
- {
- if (this.method == "POST")
- this.req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
-
- this.req.send(this.post_data);
- }
- else
- {
- var req_url = baseurl + (baseurl.match(/\?/) ? "&" : "?") + "pos=" + pos + "&num=" + num + (query_volatile ? query_volatile : "") + (this.post_data ? '&' + this.post_data : "") + "&itjs_call=it_loader.__inst" + this.instance + "&itjs_callid=" + ++this.callid;
-
- if (samehost || (window.opera && !window.XMLHttpRequest)) // Opera 7 only works with iframes
- {
- var scrpt = document.createElement("iframe");
- scrpt.style.width = scrpt.style.height = 1;
- req_url += "&itjs_iframe=1";
- }
- else
- var scrpt = document.createElement("script");
-
- it_loader['__inst' + this.instance] = this;
- this.req = { starttime: this.starttime, retry: retry };
- try
- {
- this.scrpt[this.callid] = scrpt;
- if (!document.all) scrpt.src = req_url;
- document.body.appendChild(scrpt);
- if (document.all) scrpt.src = req_url;
- }
- catch (e) { return false; }
- }
+ this.http = it_http.get_instance();
+ this.http.get(baseurl + (baseurl.match(/\?/) ? "&" : "?") + "pos=" + pos + "&num=" + num + (retry ? "&retry=" + retry : "") + (query_volatile ? query_volatile : ""), this.callback);
}
else
this.handler.render(this);
@@ -146,52 +72,12 @@ load: function(baseurl, pos, num, query_volatile, retry)
return true;
},
+/* deprecated: use it_http::post() instead */
post: function(baseurl, data)
{
this.clear();
- this.method = "POST";
- this.baseurl = baseurl;
- this.start = this.end = 10;
- this.post_data = "";
-
- if (typeof data == 'object')
- {
- for (var k in data)
- this.post_data += (this.post_data ? "&" : "") + k + "=" + it_url_encode(data[k]);
- }
- else
- this.post_data = data;
-
- this.load(baseurl, 0, 1, "");
-},
-
-readyStateChanged: function()
-{
- var req = this.req; // Avoid race conditions
- it_loader.sequence += "r";
-
- if (req && (req.readyState == 4))
- {
- var data = null;
-
- try
- {
- if (req.responseText != "")
- data = eval("(" + req.responseText + ")");
- }
- catch (e)
- {
- var retry = this.retry + 1;
-
- if (retry < 10)
- it_timer({ object: this, method: "retryload", timeout: Math.pow(5, Math.min(retry, 5)), baseurl: this.baseurl, pos: this.pos, num: this.num, query_volatile: this.query_volatile, retry: retry });
- else
- ED(e, req.responseText);
- }
-
- if (data)
- this.dataReady(data, this.callid);
- }
+ this.http = it_http.get_instance();
+ this.http.post(baseurl, data, this.callback);
},
retryload: function(p)
@@ -199,17 +85,11 @@ retryload: function(p)
this.load(p.baseurl, p.pos, p.num, p.query_volatile, p.retry);
},
-dataReady: function(data, callid)
+dataReady: function(data)
{
- var fixkonqueror33gcbug = this.req;
- var loadtime = new Date().getTime() - this.starttime;
- it_loader.sequence += "e";
-
- this.req = null;
-
- if ((typeof data == "object") && (this.callid == callid))
+ if ((typeof data == "object"))
{
- this.attr = { loadtime: loadtime };
+ this.attr = {};
for (var key in data)
{
@@ -235,42 +115,27 @@ dataReady: function(data, callid)
this.load(this.baseurl, this.end, this.pos + this.num - this.end);
it_loader.sequence += "h";
+ this.http = null;
}
-
- this.unlink(callid);
},
-stop: function()
+onerror: function(response)
{
- try
- {
- this.req.abort();
- }
- catch (e) { }
+ var retry = this.retry + 1;
- this.unlink(this.callid);
+ if (retry < 10)
+ it_timer({ object: this, method: "retryload", timeout: Math.pow(5, Math.min(retry, 5)), baseurl: this.baseurl, pos: this.pos, num: this.num, query_volatile: this.query_volatile, retry: retry });
+ else
+ ED(response);
},
-unlink: function(callid)
+stop: function()
{
- if (it_loader['__inst' + this.instance] && callid == this.callid)
- it_loader['__inst' + this.instance] = null;
-
- if (this.req)
- this.req = null;
-
- if (this.scrpt[callid])
- {
- if (!(document.all && String(navigator.userAgent).indexOf('MSIE 5.0') > 0))
- document.body.removeChild(this.scrpt[callid]);
- this.scrpt[callid] = null;
- }
-
- it_loader.sequence = "";
+ if (this.http)
+ this.http.stop();
} /* NO COMMA */
}
// static properties
-it_loader.instances = 0;
it_loader.sequence = "";
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 01:28:13 +0000