examples/server_side/pipeline.html

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
        <head>
                <meta http-equiv="content-type" content="text/html; charset=utf-8" />
                <link rel="shortcut icon" type="image/ico" href="http://www.datatables.net/media/images/favicon.ico" />
                
                <title>DataTables example</title>
                <style type="text/css" title="currentStyle">
                        @import "../../media/css/demo_page.css";
                        @import "../../media/css/demo_table.css";
                </style>
                <script type="text/javascript" language="javascript" src="../../media/js/jquery.js"></script>
                <script type="text/javascript" language="javascript" src="../../media/js/jquery.dataTables.js"></script>
                <script type="text/javascript" charset="utf-8">
                        var oCache = {
                                iCacheLower: -1
                        };
                        
                        function fnSetKey( aoData, sKey, mValue )
                        {
                                for ( var i=0, iLen=aoData.length ; i<iLen ; i++ )
                                {
                                        if ( aoData[i].name == sKey )
                                        {
                                                aoData[i].value = mValue;
                                        }
                                }
                        }
                        
                        function fnGetKey( aoData, sKey )
                        {
                                for ( var i=0, iLen=aoData.length ; i<iLen ; i++ )
                                {
                                        if ( aoData[i].name == sKey )
                                        {
                                                return aoData[i].value;
                                        }
                                }
                                return null;
                        }
                        
                        function fnDataTablesPipeline ( sSource, aoData, fnCallback, oSettings ) {
                                var iPipe = 5; /* Ajust the pipe size */
                                
                                var bNeedServer = false;
                                var sEcho = fnGetKey(aoData, "sEcho");
                                var iRequestStart = fnGetKey(aoData, "iDisplayStart");
                                var iRequestLength = fnGetKey(aoData, "iDisplayLength");
                                var iRequestEnd = iRequestStart + iRequestLength;
                                oCache.iDisplayStart = iRequestStart;
                                
                                /* outside pipeline? */
                                if ( oCache.iCacheLower < 0 || iRequestStart < oCache.iCacheLower || iRequestEnd > oCache.iCacheUpper )
                                {
                                        bNeedServer = true;
                                }
                                
                                /* sorting etc changed? */
                                if ( oCache.lastRequest && !bNeedServer )
                                {
                                        for( var i=0, iLen=aoData.length ; i<iLen ; i++ )
                                        {
                                                if ( aoData[i].name != "iDisplayStart" && aoData[i].name != "iDisplayLength" && aoData[i].name != "sEcho" )
                                                {
                                                        if ( aoData[i].value != oCache.lastRequest[i].value )
                                                        {
                                                                bNeedServer = true;
                                                                break;
                                                        }
                                                }
                                        }
                                }
                                
                                /* Store the request for checking next time around */
                                oCache.lastRequest = aoData.slice();
                                
                                if ( bNeedServer )
                                {
                                        if ( iRequestStart < oCache.iCacheLower )
                                        {
                                                iRequestStart = iRequestStart - (iRequestLength*(iPipe-1));
                                                if ( iRequestStart < 0 )
                                                {
                                                        iRequestStart = 0;
                                                }
                                        }
                                        
                                        oCache.iCacheLower = iRequestStart;
                                        oCache.iCacheUpper = iRequestStart + (iRequestLength * iPipe);
                                        oCache.iDisplayLength = fnGetKey( aoData, "iDisplayLength" );
                                        fnSetKey( aoData, "iDisplayStart", iRequestStart );
                                        fnSetKey( aoData, "iDisplayLength", iRequestLength*iPipe );
                                        
                                        oSettings.jqXHR = $.getJSON( sSource, aoData, function (json) { 
                                                /* Callback processing */
                                                oCache.lastJson = jQuery.extend(true, {}, json);
                                                
                                                if ( oCache.iCacheLower != oCache.iDisplayStart )
                                                {
                                                        json.aaData.splice( 0, oCache.iDisplayStart-oCache.iCacheLower );
                                                }
                                                json.aaData.splice( oCache.iDisplayLength, json.aaData.length );
                                                
                                                fnCallback(json)
                                        } );
                                }
                                else
                                {
                                        json = jQuery.extend(true, {}, oCache.lastJson);
                                        json.sEcho = sEcho; /* Update the echo for each response */
                                        json.aaData.splice( 0, iRequestStart-oCache.iCacheLower );
                                        json.aaData.splice( iRequestLength, json.aaData.length );
                                        fnCallback(json);
                                        return;
                                }
                        }
                        
                        $(document).ready(function() {
                                $('#example').dataTable( {
                                        "bProcessing": true,
                                        "bServerSide": true,
                                        "sAjaxSource": "scripts/server_processing.php",
                                        "fnServerData": fnDataTablesPipeline
                                } );
                        } );
                </script>
        </head>
        <body id="dt_example">
                <div id="container">
                        <div class="full_width big">
                                DataTables server-side processing with pipelining example
                        </div>
                        
                        <h1>Preamble</h1>
                        <p>When using server-side processing with DataTables, it can be quite intensive on your server having an Ajax call every time the user performs some kind of interaction - you can effectively DDOS your server with your own application!</p>
                        <p>This example shows how you might over-come this by modifying the request set to the server to retrieve more information than is actually required for a single page's display. This means that the user can page multiple times (5 times the display size is the default) before a request must be made of the server. Paging is typically the most common interaction performed with a DataTable, so this can be most beneficial to your server's resource usage. Of course the pipeline must be cleared for interactions other than paging (sorting, filtering etc), but that's the trade off that can be made (sending extra information is cheap - while another XHR is expensive).</p>
                        
                        <h1>Live example</h1>
                        <div id="dynamic">
<table cellpadding="0" cellspacing="0" border="0" class="display" id="example">
        <thead>
                <tr>
                        <th width="20%">Rendering engine</th>
                        <th width="25%">Browser</th>
                        <th width="25%">Platform(s)</th>
                        <th width="15%">Engine version</th>
                        <th width="15%">CSS grade</th>
                </tr>
        </thead>
        <tbody>
                <tr>
                        <td colspan="5" class="dataTables_empty">Loading data from server</td>
                </tr>
        </tbody>
        <tfoot>
                <tr>
                        <th>Rendering engine</th>
                        <th>Browser</th>
                        <th>Platform(s)</th>
                        <th>Engine version</th>
                        <th>CSS grade</th>
                </tr>
        </tfoot>
</table>
                        </div>
                        <div class="spacer"></div>
                        
                        
                        <h1>Initialisation code</h1>
                        <pre class="brush: js;">var oCache = {
        iCacheLower: -1
};

function fnSetKey( aoData, sKey, mValue )
{
        for ( var i=0, iLen=aoData.length ; i&lt;iLen ; i++ )
        {
                if ( aoData[i].name == sKey )
                {
                        aoData[i].value = mValue;
                }
        }
}

function fnGetKey( aoData, sKey )
{
        for ( var i=0, iLen=aoData.length ; i&lt;iLen ; i++ )
        {
                if ( aoData[i].name == sKey )
                {
                        return aoData[i].value;
                }
        }
        return null;
}

function fnDataTablesPipeline ( sSource, aoData, fnCallback ) {
        var iPipe = 5; /* Ajust the pipe size */
        
        var bNeedServer = false;
        var sEcho = fnGetKey(aoData, "sEcho");
        var iRequestStart = fnGetKey(aoData, "iDisplayStart");
        var iRequestLength = fnGetKey(aoData, "iDisplayLength");
        var iRequestEnd = iRequestStart + iRequestLength;
        oCache.iDisplayStart = iRequestStart;
        
        /* outside pipeline? */
        if ( oCache.iCacheLower &lt; 0 || iRequestStart &lt; oCache.iCacheLower || iRequestEnd &gt; oCache.iCacheUpper )
        {
                bNeedServer = true;
        }
        
        /* sorting etc changed? */
        if ( oCache.lastRequest &amp;&amp; !bNeedServer )
        {
                for( var i=0, iLen=aoData.length ; i&lt;iLen ; i++ )
                {
                        if ( aoData[i].name != "iDisplayStart" &amp;&amp; aoData[i].name != "iDisplayLength" &amp;&amp; aoData[i].name != "sEcho" )
                        {
                                if ( aoData[i].value != oCache.lastRequest[i].value )
                                {
                                        bNeedServer = true;
                                        break;
                                }
                        }
                }
        }
        
        /* Store the request for checking next time around */
        oCache.lastRequest = aoData.slice();
        
        if ( bNeedServer )
        {
                if ( iRequestStart &lt; oCache.iCacheLower )
                {
                        iRequestStart = iRequestStart - (iRequestLength*(iPipe-1));
                        if ( iRequestStart &lt; 0 )
                        {
                                iRequestStart = 0;
                        }
                }
                
                oCache.iCacheLower = iRequestStart;
                oCache.iCacheUpper = iRequestStart + (iRequestLength * iPipe);
                oCache.iDisplayLength = fnGetKey( aoData, "iDisplayLength" );
                fnSetKey( aoData, "iDisplayStart", iRequestStart );
                fnSetKey( aoData, "iDisplayLength", iRequestLength*iPipe );
                
                $.getJSON( sSource, aoData, function (json) { 
                        /* Callback processing */
                        oCache.lastJson = jQuery.extend(true, {}, json);
                        
                        if ( oCache.iCacheLower != oCache.iDisplayStart )
                        {
                                json.aaData.splice( 0, oCache.iDisplayStart-oCache.iCacheLower );
                        }
                        json.aaData.splice( oCache.iDisplayLength, json.aaData.length );
                        
                        fnCallback(json)
                } );
        }
        else
        {
                json = jQuery.extend(true, {}, oCache.lastJson);
                json.sEcho = sEcho; /* Update the echo for each response */
                json.aaData.splice( 0, iRequestStart-oCache.iCacheLower );
                json.aaData.splice( iRequestLength, json.aaData.length );
                fnCallback(json);
                return;
        }
}

$(document).ready(function() {
        $('#example').dataTable( {
                "bProcessing": true,
                "bServerSide": true,
                "sAjaxSource": "scripts/server_processing.php",
                "fnServerData": fnDataTablesPipeline
        } );
} );</pre>
                        <style type="text/css">
                                @import "../examples_support/syntax/css/shCore.css";
                        </style>
                        <script type="text/javascript" language="javascript" src="../examples_support/syntax/js/shCore.js"></script>

                        <h1>Server response</h1>
                        <p>The code below shows the latest JSON data that has been returned from the server in response to the Ajax request made by DataTables. This will update as further requests are made.</p>
                        <pre id="latest_xhr" class="brush: js;"></pre>
                        
                        
                        <h1>Other examples</h1>
                        <div class="demo_links">
                                <h2>Basic initialisation</h2>
                                <ul>
                                        <li><a href="../basic_init/zero_config.html">Zero configuration</a></li>
                                        <li><a href="../basic_init/filter_only.html">Feature enablement</a></li>
                                        <li><a href="../basic_init/table_sorting.html">Sorting data</a></li>
                                        <li><a href="../basic_init/multi_col_sort.html">Multi-column sorting</a></li>
                                        <li><a href="../basic_init/multiple_tables.html">Multiple tables</a></li>
                                        <li><a href="../basic_init/hidden_columns.html">Hidden columns</a></li>
                                        <li><a href="../basic_init/complex_header.html">Complex headers - grouping with colspan</a></li>
                                        <li><a href="../basic_init/dom.html">DOM positioning</a></li>
                                        <li><a href="../basic_init/flexible_width.html">Flexible table width</a></li>
                                        <li><a href="../basic_init/state_save.html">State saving</a></li>
                                        <li><a href="../basic_init/alt_pagination.html">Alternative pagination styles</a></li>
                                        <li>Scrolling: <br>
                                                <a href="../basic_init/scroll_x.html">Horizontal</a> / 
                                                <a href="../basic_init/scroll_y.html">Vertical</a> / 
                                                <a href="../basic_init/scroll_xy.html">Both</a> / 
                                                <a href="../basic_init/scroll_y_theme.html">Themed</a> / 
                                                <a href="../basic_init/scroll_y_infinite.html">Infinite</a>
                                        </li>
                                        <li><a href="../basic_init/language.html">Change language information (internationalisation)</a></li>
                                        <li><a href="../basic_init/themes.html">ThemeRoller themes (Smoothness)</a></li>
                                </ul>
                                
                                <h2>Advanced initialisation</h2>
                                <ul>
                                        <li>Events: <br>
                                                <a href="../advanced_init/events_live.html">Live events</a> / 
                                                <a href="../advanced_init/events_pre_init.html">Pre-init</a> / 
                                                <a href="../advanced_init/events_post_init.html">Post-init</a>
                                        </li>
                                        <li><a href="../advanced_init/column_render.html">Column rendering</a></li>
                                        <li><a href="../advanced_init/html_sort.html">Sorting without HTML tags</a></li>
                                        <li><a href="../advanced_init/dom_multiple_elements.html">Multiple table controls (sDom)</a></li>
                                        <li><a href="../advanced_init/length_menu.html">Defining length menu options</a></li>
                                        <li><a href="../advanced_init/complex_header.html">Complex headers and hidden columns</a></li>
                                        <li><a href="../advanced_init/dom_toolbar.html">Custom toolbar (element) around table</a></li>
                                        <li><a href="../advanced_init/highlight.html">Row highlighting with CSS</a></li>
                                        <li><a href="../advanced_init/row_grouping.html">Row grouping</a></li>
                                        <li><a href="../advanced_init/row_callback.html">Row callback</a></li>
                                        <li><a href="../advanced_init/footer_callback.html">Footer callback</a></li>
                                        <li><a href="../advanced_init/sorting_control.html">Control sorting direction of columns</a></li>
                                        <li><a href="../advanced_init/language_file.html">Change language information from a file (internationalisation)</a></li>
                                        <li><a href="../advanced_init/defaults.html">Setting defaults</a></li>
                                        <li><a href="../advanced_init/localstorage.html">State saving with localStorage</a></li>
                                        <li><a href="../advanced_init/dt_events.html">Custom events</a></li>
                                </ul>
                                
                                <h2>API</h2>
                                <ul>
                                        <li><a href="../api/add_row.html">Dynamically add a new row</a></li>
                                        <li><a href="../api/multi_filter.html">Individual column filtering (using "input" elements)</a></li>
                                        <li><a href="../api/multi_filter_select.html">Individual column filtering (using "select" elements)</a></li>
                                        <li><a href="../api/highlight.html">Highlight rows and columns</a></li>
                                        <li><a href="../api/row_details.html">Show and hide details about a particular record</a></li>
                                        <li><a href="../api/select_row.html">User selectable rows (multiple rows)</a></li>
                                        <li><a href="../api/select_single_row.html">User selectable rows (single row) and delete rows</a></li>
                                        <li><a href="../api/editable.html">Editable rows (with jEditable)</a></li>
                                        <li><a href="../api/form.html">Submit form with elements in table</a></li>
                                        <li><a href="../api/counter_column.html">Index column (static number column)</a></li>
                                        <li><a href="../api/show_hide.html">Show and hide columns dynamically</a></li>
                                        <li><a href="../api/api_in_init.html">API function use in initialisation object (callback)</a></li>
                                        <li><a href="../api/tabs_and_scrolling.html">DataTables scrolling and tabs</a></li>
                                        <li><a href="../api/regex.html">Regular expression filtering</a></li>
                                </ul>
                        </div>
                        
                        <div class="demo_links">
                                <h2>Data sources</h2>
                                <ul>
                                        <li><a href="../data_sources/dom.html">DOM</a></li>
                                        <li><a href="../data_sources/js_array.html">Javascript array</a></li>
                                        <li><a href="../data_sources/ajax.html">Ajax source</a></li>
                                        <li><a href="../data_sources/server_side.html">Server side processing</a></li>
                                </ul>
                                
                                <h2>Server-side processing</h2>
                                <ul>
                                        <li><a href="../server_side/server_side.html">Obtain server-side data</a></li>
                                        <li><a href="../server_side/custom_vars.html">Add extra HTTP variables</a></li>
                                        <li><a href="../server_side/post.html">Use HTTP POST</a></li>
                                        <li><a href="../server_side/ids.html">Automatic addition of IDs and classes to rows</a></li>
                                        <li><a href="../server_side/object_data.html">Reading table data from objects</a></li>
                                        <li><a href="../server_side/row_details.html">Show and hide details about a particular record</a></li>
                                        <li><a href="../server_side/select_rows.html">User selectable rows (multiple rows)</a></li>
                                        <li><a href="../server_side/jsonp.html">JSONP for a cross domain data source</a></li>
                                        <li><a href="../server_side/editable.html">jEditable integration with DataTables</a></li>
                                        <li><a href="../server_side/defer_loading.html">Deferred loading of Ajax data</a></li>
                                        <li><a href="../server_side/pipeline.html">Pipelining data (reduce Ajax calls for paging)</a></li>
                                </ul>
                                
                                <h2>Ajax data source</h2>
                                <ul>
                                        <li><a href="../ajax/ajax.html">Ajax sourced data (array of arrays)</a></li>
                                        <li><a href="../ajax/objects.html">Ajax sourced data (array of objects)</a></li>
                                        <li><a href="../ajax/defer_render.html">Deferred DOM creation for extra speed</a></li>
                                        <li><a href="../ajax/null_data_source.html">Empty data source columns</a></li>
                                        <li><a href="../ajax/custom_data_property.html">Use a data source other than aaData (the default)</a></li>
                                        <li><a href="../ajax/objects_subarrays.html">Read column data from sub-arrays</a></li>
                                        <li><a href="../ajax/deep.html">Read column data from deeply nested properties</a></li>
                                </ul>
                                
                                <h2>Plug-ins</h2>
                                <ul>
                                        <li><a href="../plug-ins/plugin_api.html">Add custom API functions</a></li>
                                        <li><a href="../plug-ins/sorting_plugin.html">Sorting and automatic type detection</a></li>
                                        <li><a href="../plug-ins/sorting_sType.html">Sorting without automatic type detection</a></li>
                                        <li><a href="../plug-ins/paging_plugin.html">Custom pagination controls</a></li>
                                        <li><a href="../plug-ins/range_filtering.html">Range filtering / custom filtering</a></li>
                                        <li><a href="../plug-ins/dom_sort.html">Live DOM sorting</a></li>
                                        <li><a href="../plug-ins/html_sort.html">Automatic HTML type detection</a></li>
                                </ul>
                        </div>
                        
                        
                        <div id="footer" class="clear" style="text-align:center;">
                                <p>
                                        Please refer to the <a href="http://www.datatables.net/usage">DataTables documentation</a> for full information about its API properties and methods.<br>
                                        Additionally, there are a wide range of <a href="http://www.datatables.net/extras">extras</a> and <a href="http://www.datatables.net/plug-ins">plug-ins</a> which extend the capabilities of DataTables.
                                </p>
                                
                                <span style="font-size:10px;">
                                        DataTables designed and created by <a href="http://www.sprymedia.co.uk">Allan Jardine</a> &copy; 2007-2011<br>
                                        DataTables is dual licensed under the <a href="http://www.datatables.net/license_gpl2">GPL v2 license</a> or a <a href="http://www.datatables.net/license_bsd">BSD (3-point) license</a>.
                                </span>
                        </div>
                </div>
        </body>
</html>
1	torben	2125	<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
2			<html>
3			<head>
4			<meta http-equiv="content-type" content="text/html; charset=utf-8" />
5			<link rel="shortcut icon" type="image/ico" href="http://www.datatables.net/media/images/favicon.ico" />
6
7			<title>DataTables example</title>
8			<style type="text/css" title="currentStyle">
9			@import "../../media/css/demo_page.css";
10			@import "../../media/css/demo_table.css";
11			</style>
12			<script type="text/javascript" language="javascript" src="../../media/js/jquery.js"></script>
13			<script type="text/javascript" language="javascript" src="../../media/js/jquery.dataTables.js"></script>
14			<script type="text/javascript" charset="utf-8">
15			var oCache = {
16			iCacheLower: -1
17			};
18
19			function fnSetKey( aoData, sKey, mValue )
20			{
21			for ( var i=0, iLen=aoData.length ; i<iLen ; i++ )
22			{
23			if ( aoData[i].name == sKey )
24			{
25			aoData[i].value = mValue;
26			}
27			}
28			}
29
30			function fnGetKey( aoData, sKey )
31			{
32			for ( var i=0, iLen=aoData.length ; i<iLen ; i++ )
33			{
34			if ( aoData[i].name == sKey )
35			{
36			return aoData[i].value;
37			}
38			}
39			return null;
40			}
41
42			function fnDataTablesPipeline ( sSource, aoData, fnCallback, oSettings ) {
43			var iPipe = 5; /* Ajust the pipe size */
44
45			var bNeedServer = false;
46			var sEcho = fnGetKey(aoData, "sEcho");
47			var iRequestStart = fnGetKey(aoData, "iDisplayStart");
48			var iRequestLength = fnGetKey(aoData, "iDisplayLength");
49			var iRequestEnd = iRequestStart + iRequestLength;
50			oCache.iDisplayStart = iRequestStart;
51
52			/* outside pipeline? */
53			if ( oCache.iCacheLower < 0 \|\| iRequestStart < oCache.iCacheLower \|\| iRequestEnd > oCache.iCacheUpper )
54			{
55			bNeedServer = true;
56			}
57
58			/* sorting etc changed? */
59			if ( oCache.lastRequest && !bNeedServer )
60			{
61			for( var i=0, iLen=aoData.length ; i<iLen ; i++ )
62			{
63			if ( aoData[i].name != "iDisplayStart" && aoData[i].name != "iDisplayLength" && aoData[i].name != "sEcho" )
64			{
65			if ( aoData[i].value != oCache.lastRequest[i].value )
66			{
67			bNeedServer = true;
68			break;
69			}
70			}
71			}
72			}
73
74			/* Store the request for checking next time around */
75			oCache.lastRequest = aoData.slice();
76
77			if ( bNeedServer )
78			{
79			if ( iRequestStart < oCache.iCacheLower )
80			{
81			iRequestStart = iRequestStart - (iRequestLength*(iPipe-1));
82			if ( iRequestStart < 0 )
83			{
84			iRequestStart = 0;
85			}
86			}
87
88			oCache.iCacheLower = iRequestStart;
89			oCache.iCacheUpper = iRequestStart + (iRequestLength * iPipe);
90			oCache.iDisplayLength = fnGetKey( aoData, "iDisplayLength" );
91			fnSetKey( aoData, "iDisplayStart", iRequestStart );
92			fnSetKey( aoData, "iDisplayLength", iRequestLength*iPipe );
93
94			oSettings.jqXHR = $.getJSON( sSource, aoData, function (json) {
95			/* Callback processing */
96			oCache.lastJson = jQuery.extend(true, {}, json);
97
98			if ( oCache.iCacheLower != oCache.iDisplayStart )
99			{
100			json.aaData.splice( 0, oCache.iDisplayStart-oCache.iCacheLower );
101			}
102			json.aaData.splice( oCache.iDisplayLength, json.aaData.length );
103
104			fnCallback(json)
105			} );
106			}
107			else
108			{
109			json = jQuery.extend(true, {}, oCache.lastJson);
110			json.sEcho = sEcho; /* Update the echo for each response */
111			json.aaData.splice( 0, iRequestStart-oCache.iCacheLower );
112			json.aaData.splice( iRequestLength, json.aaData.length );
113			fnCallback(json);
114			return;
115			}
116			}
117
118			$(document).ready(function() {
119			$('#example').dataTable( {
120			"bProcessing": true,
121			"bServerSide": true,
122			"sAjaxSource": "scripts/server_processing.php",
123			"fnServerData": fnDataTablesPipeline
124			} );
125			} );
126			</script>
127			</head>
128			<body id="dt_example">
129			<div id="container">
130			<div class="full_width big">
131			DataTables server-side processing with pipelining example
132			</div>
133
134			<h1>Preamble</h1>
135			<p>When using server-side processing with DataTables, it can be quite intensive on your server having an Ajax call every time the user performs some kind of interaction - you can effectively DDOS your server with your own application!</p>
136			<p>This example shows how you might over-come this by modifying the request set to the server to retrieve more information than is actually required for a single page's display. This means that the user can page multiple times (5 times the display size is the default) before a request must be made of the server. Paging is typically the most common interaction performed with a DataTable, so this can be most beneficial to your server's resource usage. Of course the pipeline must be cleared for interactions other than paging (sorting, filtering etc), but that's the trade off that can be made (sending extra information is cheap - while another XHR is expensive).</p>
137
138			<h1>Live example</h1>
139			<div id="dynamic">
140			<table cellpadding="0" cellspacing="0" border="0" class="display" id="example">
141			<thead>
142			<tr>
143			<th width="20%">Rendering engine</th>
144			<th width="25%">Browser</th>
145			<th width="25%">Platform(s)</th>
146			<th width="15%">Engine version</th>
147			<th width="15%">CSS grade</th>
148			</tr>
149			</thead>
150			<tbody>
151			<tr>
152			<td colspan="5" class="dataTables_empty">Loading data from server</td>
153			</tr>
154			</tbody>
155			<tfoot>
156			<tr>
157			<th>Rendering engine</th>
158			<th>Browser</th>
159			<th>Platform(s)</th>
160			<th>Engine version</th>
161			<th>CSS grade</th>
162			</tr>
163			</tfoot>
164			</table>
165			</div>
166			<div class="spacer"></div>
167
168
169			<h1>Initialisation code</h1>
170			<pre class="brush: js;">var oCache = {
171			iCacheLower: -1
172			};
173
174			function fnSetKey( aoData, sKey, mValue )
175			{
176			for ( var i=0, iLen=aoData.length ; i<iLen ; i++ )
177			{
178			if ( aoData[i].name == sKey )
179			{
180			aoData[i].value = mValue;
181			}
182			}
183			}
184
185			function fnGetKey( aoData, sKey )
186			{
187			for ( var i=0, iLen=aoData.length ; i<iLen ; i++ )
188			{
189			if ( aoData[i].name == sKey )
190			{
191			return aoData[i].value;
192			}
193			}
194			return null;
195			}
196
197			function fnDataTablesPipeline ( sSource, aoData, fnCallback ) {
198			var iPipe = 5; /* Ajust the pipe size */
199
200			var bNeedServer = false;
201			var sEcho = fnGetKey(aoData, "sEcho");
202			var iRequestStart = fnGetKey(aoData, "iDisplayStart");
203			var iRequestLength = fnGetKey(aoData, "iDisplayLength");
204			var iRequestEnd = iRequestStart + iRequestLength;
205			oCache.iDisplayStart = iRequestStart;
206
207			/* outside pipeline? */
208			if ( oCache.iCacheLower < 0 \|\| iRequestStart < oCache.iCacheLower \|\| iRequestEnd > oCache.iCacheUpper )
209			{
210			bNeedServer = true;
211			}
212
213			/* sorting etc changed? */
214			if ( oCache.lastRequest && !bNeedServer )
215			{
216			for( var i=0, iLen=aoData.length ; i<iLen ; i++ )
217			{
218			if ( aoData[i].name != "iDisplayStart" && aoData[i].name != "iDisplayLength" && aoData[i].name != "sEcho" )
219			{
220			if ( aoData[i].value != oCache.lastRequest[i].value )
221			{
222			bNeedServer = true;
223			break;
224			}
225			}
226			}
227			}
228
229			/* Store the request for checking next time around */
230			oCache.lastRequest = aoData.slice();
231
232			if ( bNeedServer )
233			{
234			if ( iRequestStart < oCache.iCacheLower )
235			{
236			iRequestStart = iRequestStart - (iRequestLength*(iPipe-1));
237			if ( iRequestStart < 0 )
238			{
239			iRequestStart = 0;
240			}
241			}
242
243			oCache.iCacheLower = iRequestStart;
244			oCache.iCacheUpper = iRequestStart + (iRequestLength * iPipe);
245			oCache.iDisplayLength = fnGetKey( aoData, "iDisplayLength" );
246			fnSetKey( aoData, "iDisplayStart", iRequestStart );
247			fnSetKey( aoData, "iDisplayLength", iRequestLength*iPipe );
248
249			$.getJSON( sSource, aoData, function (json) {
250			/* Callback processing */
251			oCache.lastJson = jQuery.extend(true, {}, json);
252
253			if ( oCache.iCacheLower != oCache.iDisplayStart )
254			{
255			json.aaData.splice( 0, oCache.iDisplayStart-oCache.iCacheLower );
256			}
257			json.aaData.splice( oCache.iDisplayLength, json.aaData.length );
258
259			fnCallback(json)
260			} );
261			}
262			else
263			{
264			json = jQuery.extend(true, {}, oCache.lastJson);
265			json.sEcho = sEcho; /* Update the echo for each response */
266			json.aaData.splice( 0, iRequestStart-oCache.iCacheLower );
267			json.aaData.splice( iRequestLength, json.aaData.length );
268			fnCallback(json);
269			return;
270			}
271			}
272
273			$(document).ready(function() {
274			$('#example').dataTable( {
275			"bProcessing": true,
276			"bServerSide": true,
277			"sAjaxSource": "scripts/server_processing.php",
278			"fnServerData": fnDataTablesPipeline
279			} );
280			} );</pre>
281			<style type="text/css">
282			@import "../examples_support/syntax/css/shCore.css";
283			</style>
284			<script type="text/javascript" language="javascript" src="../examples_support/syntax/js/shCore.js"></script>
285
286			<h1>Server response</h1>
287			<p>The code below shows the latest JSON data that has been returned from the server in response to the Ajax request made by DataTables. This will update as further requests are made.</p>
288			<pre id="latest_xhr" class="brush: js;"></pre>
289
290
291			<h1>Other examples</h1>
292			<div class="demo_links">
293			<h2>Basic initialisation</h2>
294			<ul>
295			<li><a href="../basic_init/zero_config.html">Zero configuration</a></li>
296			<li><a href="../basic_init/filter_only.html">Feature enablement</a></li>
297			<li><a href="../basic_init/table_sorting.html">Sorting data</a></li>
298			<li><a href="../basic_init/multi_col_sort.html">Multi-column sorting</a></li>
299			<li><a href="../basic_init/multiple_tables.html">Multiple tables</a></li>
300			<li><a href="../basic_init/hidden_columns.html">Hidden columns</a></li>
301			<li><a href="../basic_init/complex_header.html">Complex headers - grouping with colspan</a></li>
302			<li><a href="../basic_init/dom.html">DOM positioning</a></li>
303			<li><a href="../basic_init/flexible_width.html">Flexible table width</a></li>
304			<li><a href="../basic_init/state_save.html">State saving</a></li>
305			<li><a href="../basic_init/alt_pagination.html">Alternative pagination styles</a></li>
306			<li>Scrolling: <br>
307			<a href="../basic_init/scroll_x.html">Horizontal</a> /
308			<a href="../basic_init/scroll_y.html">Vertical</a> /
309			<a href="../basic_init/scroll_xy.html">Both</a> /
310			<a href="../basic_init/scroll_y_theme.html">Themed</a> /
311			<a href="../basic_init/scroll_y_infinite.html">Infinite</a>
312			</li>
313			<li><a href="../basic_init/language.html">Change language information (internationalisation)</a></li>
314			<li><a href="../basic_init/themes.html">ThemeRoller themes (Smoothness)</a></li>
315			</ul>
316
317			<h2>Advanced initialisation</h2>
318			<ul>
319			<li>Events: <br>
320			<a href="../advanced_init/events_live.html">Live events</a> /
321			<a href="../advanced_init/events_pre_init.html">Pre-init</a> /
322			<a href="../advanced_init/events_post_init.html">Post-init</a>
323			</li>
324			<li><a href="../advanced_init/column_render.html">Column rendering</a></li>
325			<li><a href="../advanced_init/html_sort.html">Sorting without HTML tags</a></li>
326			<li><a href="../advanced_init/dom_multiple_elements.html">Multiple table controls (sDom)</a></li>
327			<li><a href="../advanced_init/length_menu.html">Defining length menu options</a></li>
328			<li><a href="../advanced_init/complex_header.html">Complex headers and hidden columns</a></li>
329			<li><a href="../advanced_init/dom_toolbar.html">Custom toolbar (element) around table</a></li>
330			<li><a href="../advanced_init/highlight.html">Row highlighting with CSS</a></li>
331			<li><a href="../advanced_init/row_grouping.html">Row grouping</a></li>
332			<li><a href="../advanced_init/row_callback.html">Row callback</a></li>
333			<li><a href="../advanced_init/footer_callback.html">Footer callback</a></li>
334			<li><a href="../advanced_init/sorting_control.html">Control sorting direction of columns</a></li>
335			<li><a href="../advanced_init/language_file.html">Change language information from a file (internationalisation)</a></li>
336			<li><a href="../advanced_init/defaults.html">Setting defaults</a></li>
337			<li><a href="../advanced_init/localstorage.html">State saving with localStorage</a></li>
338			<li><a href="../advanced_init/dt_events.html">Custom events</a></li>
339			</ul>
340
341			<h2>API</h2>
342			<ul>
343			<li><a href="../api/add_row.html">Dynamically add a new row</a></li>
344			<li><a href="../api/multi_filter.html">Individual column filtering (using "input" elements)</a></li>
345			<li><a href="../api/multi_filter_select.html">Individual column filtering (using "select" elements)</a></li>
346			<li><a href="../api/highlight.html">Highlight rows and columns</a></li>
347			<li><a href="../api/row_details.html">Show and hide details about a particular record</a></li>
348			<li><a href="../api/select_row.html">User selectable rows (multiple rows)</a></li>
349			<li><a href="../api/select_single_row.html">User selectable rows (single row) and delete rows</a></li>
350			<li><a href="../api/editable.html">Editable rows (with jEditable)</a></li>
351			<li><a href="../api/form.html">Submit form with elements in table</a></li>
352			<li><a href="../api/counter_column.html">Index column (static number column)</a></li>
353			<li><a href="../api/show_hide.html">Show and hide columns dynamically</a></li>
354			<li><a href="../api/api_in_init.html">API function use in initialisation object (callback)</a></li>
355			<li><a href="../api/tabs_and_scrolling.html">DataTables scrolling and tabs</a></li>
356			<li><a href="../api/regex.html">Regular expression filtering</a></li>
357			</ul>
358			</div>
359
360			<div class="demo_links">
361			<h2>Data sources</h2>
362			<ul>
363			<li><a href="../data_sources/dom.html">DOM</a></li>
364			<li><a href="../data_sources/js_array.html">Javascript array</a></li>
365			<li><a href="../data_sources/ajax.html">Ajax source</a></li>
366			<li><a href="../data_sources/server_side.html">Server side processing</a></li>
367			</ul>
368
369			<h2>Server-side processing</h2>
370			<ul>
371			<li><a href="../server_side/server_side.html">Obtain server-side data</a></li>
372			<li><a href="../server_side/custom_vars.html">Add extra HTTP variables</a></li>
373			<li><a href="../server_side/post.html">Use HTTP POST</a></li>
374			<li><a href="../server_side/ids.html">Automatic addition of IDs and classes to rows</a></li>
375			<li><a href="../server_side/object_data.html">Reading table data from objects</a></li>
376			<li><a href="../server_side/row_details.html">Show and hide details about a particular record</a></li>
377			<li><a href="../server_side/select_rows.html">User selectable rows (multiple rows)</a></li>
378			<li><a href="../server_side/jsonp.html">JSONP for a cross domain data source</a></li>
379			<li><a href="../server_side/editable.html">jEditable integration with DataTables</a></li>
380			<li><a href="../server_side/defer_loading.html">Deferred loading of Ajax data</a></li>
381			<li><a href="../server_side/pipeline.html">Pipelining data (reduce Ajax calls for paging)</a></li>
382			</ul>
383
384			<h2>Ajax data source</h2>
385			<ul>
386			<li><a href="../ajax/ajax.html">Ajax sourced data (array of arrays)</a></li>
387			<li><a href="../ajax/objects.html">Ajax sourced data (array of objects)</a></li>
388			<li><a href="../ajax/defer_render.html">Deferred DOM creation for extra speed</a></li>
389			<li><a href="../ajax/null_data_source.html">Empty data source columns</a></li>
390			<li><a href="../ajax/custom_data_property.html">Use a data source other than aaData (the default)</a></li>
391			<li><a href="../ajax/objects_subarrays.html">Read column data from sub-arrays</a></li>
392			<li><a href="../ajax/deep.html">Read column data from deeply nested properties</a></li>
393			</ul>
394
395			<h2>Plug-ins</h2>
396			<ul>
397			<li><a href="../plug-ins/plugin_api.html">Add custom API functions</a></li>
398			<li><a href="../plug-ins/sorting_plugin.html">Sorting and automatic type detection</a></li>
399			<li><a href="../plug-ins/sorting_sType.html">Sorting without automatic type detection</a></li>
400			<li><a href="../plug-ins/paging_plugin.html">Custom pagination controls</a></li>
401			<li><a href="../plug-ins/range_filtering.html">Range filtering / custom filtering</a></li>
402			<li><a href="../plug-ins/dom_sort.html">Live DOM sorting</a></li>
403			<li><a href="../plug-ins/html_sort.html">Automatic HTML type detection</a></li>
404			</ul>
405			</div>
406
407
408			<div id="footer" class="clear" style="text-align:center;">
409			<p>
410			Please refer to the <a href="http://www.datatables.net/usage">DataTables documentation</a> for full information about its API properties and methods.<br>
411			Additionally, there are a wide range of <a href="http://www.datatables.net/extras">extras</a> and <a href="http://www.datatables.net/plug-ins">plug-ins</a> which extend the capabilities of DataTables.
412			</p>
413
414			<span style="font-size:10px;">
415			DataTables designed and created by <a href="http://www.sprymedia.co.uk">Allan Jardine</a> © 2007-2011<br>
416			DataTables is dual licensed under the <a href="http://www.datatables.net/license_gpl2">GPL v2 license</a> or a <a href="http://www.datatables.net/license_bsd">BSD (3-point) license</a>.
417			</span>
418			</div>
419			</div>
420			</body>
421			</html>