Technology realization of non-refreshing chat room

Chat Room | refresh | no Refresh | chat Room | refresh | No Refresh first simple description

Service side

Generating the required XML files with the program

Client

Use XMLHTTP or DSO (note State) to refresh the required data periodically

In contrast, the DSO can be mapped into a recordset operation is relatively simple

Here's what I'm simply writing about. It's not a complete part.

It's just snippets, but as a technical reference, it's enough.

Need MSXML 4.0

Service side I wrote two constructors, which are chat content chat users, respectively.


<script language= "JScript" runat= "Server" >
function Slightboychat ()
{

This.id;
This. Xmldomelement = Server.CreateObject ("msxml2.freethreadeddomdocument.4.0")

This. ADD = function (Name, Content, Append)
{
var root = this. Xmldomelement.documentelement;
var newitem = this. Xmldomelement.createelement ("Item");
var newitemname = this. Xmldomelement.createelement ("Name");
var newitemnamevalue = this. Xmldomelement.createcdatasection (Name);
Newitemname.appendchild (Newitemnamevalue)
var newitemcontent = this. Xmldomelement.createelement ("Content");
var newitemcontentvalue = this. Xmldomelement.createcdatasection (Content);
Newitemcontent.appendchild (Newitemcontentvalue)
var newitemappend = this. Xmldomelement.createelement ("Append");
Newitemappend.text = Append;
Newitem.appendchild (Newitemname);
Newitem.appendchild (newitemcontent);
Newitem.appendchild (Newitemappend);
if (Root.childNodes.length > 10)
{
Root.removechild (Root.firstchild)
}
Root.appendchild (NewItem)
}
This. Save = function ()
{
Application ("chatcontent") = this. Xmldomelement.xml;
}
This. GUID = function (pushguid)
{
if (Pushguid.count > 0)
{
This.id = Pushguid;
}
Else
{
This.id = "";
}
}
This. XML = function ()
{
if (this.id!= "")
{
var xmldomelementstring = "<?xml version=\" 1.0\ "encoding=\" gb2312\ "?><chat>";
var items = Chat.XMLDOMElement.selectNodes ("//item[append >" + this.id + "]")
for (var item = Items.nextnode (); item; item = Items.nextnode ())
{
Xmldomelementstring + = Item.xml;
}
xmldomelementstring = "</Chat>";
if (Items.length > 0)
{
return xmldomelementstring;
}
Else
{
Return
}
}
Else
{
return this. XMLDOMElement.xml.replace ("<?xml version=\" 1.0\ "?>", "<?xml version=\" 1.0\ "encoding=\" gb2312\ "?>");
}

}
This. Load = function ()
{
if (Application ("chatcontent") = = "" | typeof (Application ("chatcontent")) = = "undefined")
{
Application ("chatcontent") = "<?xml version=\ 1.0\" encoding=\ "gb2312\"? ><chat><item><name >slightboy</Name><Content> Welcome ^^ </Content><Append> "+ New Date (). GetTime () +" </append ></Item></Chat> ";
}
This. Xmldomelement.loadxml (Application ("Chatcontent"));

}
This. Empty = function ()
{
Application ("chatcontent") = "<?xml version=\ 1.0\" encoding=\ "gb2312\"? ><chat><item><name >slightboy</Name><Content> Welcome ^^ </Content><Append> "+ New Date (). GetTime () +" </append ></Item></Chat> ";
}

This. Load ();
}


function Slightboychatlist ()
{
This. Xmldomelement = Server.CreateObject ("msxml2.freethreadeddomdocument.4.0")

This. ADD = function (Name, level)
{
var root = this. Xmldomelement.documentelement;
var newitem = this. Xmldomelement.createelement ("Item");
var newitemname = this. Xmldomelement.createelement ("Name");
var newitemnamevalue = this. Xmldomelement.createcdatasection (Name);
Newitemname.appendchild (Newitemnamevalue)
var newitemlevel = this. Xmldomelement.createelement ("level");
var newitemlevelvalue = this. Xmldomelement.createcdatasection (level);
Newitemlevel.appendchild (Newitemlevelvalue)
var newitemappend = this. Xmldomelement.createelement ("Append");
Newitemappend.text = Append;
Newitem.appendchild (Newitemname);
Newitem.appendchild (Newitemlevel);
Root.appendchild (NewItem)
}
This. Save = function ()