一个Ajax的Class

1   
2  
3/**   
4  
5* LibAjax   
6  
7* An open source, LGPL AJAX/XMLHTTPRequest (Asynchronous JavaScript and XML) class for PHP.   
8  
9*

1\------

1* This library is free software; you can redistribute it and/or

1* (modify it under the terms of the GNU Lesser General Public

1* License as published by the Free Software Foundation; either

1* version 2.1 of the License, or (at your option) any later version.

1* This library is distributed in the hope that it will be useful,

1* but WITHOUT ANY WARRANTY; without even the implied warranty of

1* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

1* Lesser General Public License for more details.

1* You should have received a copy of the GNU Lesser General Public

1* License along with this library; if not, write to the Free Software

1* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

1*

1\------

1* @copyright 2005 htpt://ominousminds.com   
2  
3* @version 1.0.0a   
4  
5* @author Justin Shreve

<[email protected]>

@link http://ominousminds Ominous Minds
@package LibAjax

/**

AJAX
The class to wrap all the lib's functions together.

class ajax {

/**

Export
Tells which functions to export and allow use of in JavaScript.

var $export = array();

/**

URL
Act's as a wrapper for $_SERVER['REQUEST_URI'].
@see ajax::ajax()

var $url = "" ;

/**

Mode
Tells which mode we are using to send data.
GET Should be used to view data, and POST should be used to send long strings of data
or to edit or change data.
@link http://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html RFC Standard

var $mode ;

/**

Function
Tells which function to send to the javascript functions from PHP.

var $func ;

/**

Arguments
The list of the arguments to send to the javascript functions, from PHP.

var $args = array();

/**

Javascript.
The string that holds all the javascript to print out.
@see ajax:<img alt="" border="0" src="images/smilies/redface.gif"/>utput()

var $return_javascript ;

/**

AJAX
Sets the URL value to take on $_SERVER['REQUEST_URI'];
@see ajax:: $url

function ajax ()

{

$this -> url = $_SERVER [ 'REQUEST_URI' ];

}

/**

Client Request
Sets the variables such as func and args from the get or post methods.
and then calls back to set the values.
@see ajax:: $func
@see ajax:: $args

function client_request ()

{

// Are we using POST or GET methods?

if(!empty( $_GET [ 'libajax_function' ]))

{

$this -> func = $_GET [ 'libajax_function' ];

if(!empty( $_GET [ 'libajax_args' ]))

{

$this -> args = $_GET [ 'libajax_args' ];

}

if(!empty( $_POST [ 'libajax_function' ]))

{

$this -> func = $_POST [ 'libajax_function' ];

if(!empty( $_POST [ 'libajax_args' ]))

{

$this -> args = $_POST [ 'libajax_args' ];

}

@ call_user_func_array ( $this -> func , $this -> args );

}

/**

JAVASCRIPT
Loads all the javascript side of things into a string for later.
I used a ob and heredoc work around due to the sheer ammount of data that had to be passed.
@return string The libajax_init and libajax_call functions to act as a wrapper for XMLHttpRequest.

function javascript () {

ob_start ();

print <<<libajax "&";="" ");="" "?";="" "libajax_function=" + escape(name);

for ( var i = 0; i < args.length-1; i++) { url = url + " $this="" &libajax_args="" (ajax.readystate="4)" (mode="GET" (ndata);="" (url.indexof("?")="-1)" (window.activexobject)="" (window.xmlhttprequest)="" )="" +="" -="" ;="" [="" []=" + escape(args [ i ] ); }

}

ajax.open(mode, url, true);

if(mode == " \n="" ]="" activexobject("microsoft.xmlhttp")="" ajax="new" ajax.onreadystatechange="function()" ajax.send(data);="" ajax.setrequestheader("content-type","application="" args="" args)="" args.length-1="" else="" function="" http:="" if="" justin="" libajax.sf.net="" libajax;="" libajax_call(name,="" libajax_function=" + escape(name);

for ( var i = 0; i < args.length-1; i++) { data = data + " libajax_init()="" mode=" { $this -> mode } " ndata="ajax.responseText.substring(0," ominousminds.com="" post")="" shreve="" url="url" var="" work='ajax.responseText.indexOf("' work);="" x-www-form-urlencoded");="" xmlhttprequest();="" {="" }=""> return_javascript = ob_get_contents ();

ob_end_clean ();

}

/**

Create Function
Creates the wrapper function to call to libajax_call and to send the arguments and function name.
The ob and heredoc goes for here as well, though it's not as much data.
@param $name string The name of the function to emulate.
@param $arguments mixed The arguments to emulate with the function name.

function create_jsfunction ( $name , $arguments )

{

ob_start ();

print <<<libajax ",="" $html="ob_get_contents" $name="" $this="" ()="" ();="" -="" .arguments);="" ajax_="" function="" libajax;="" libajax_call("="" ob_end_clean="" {="" }=""> return_javascript = $this -> return_javascript . $html ;

}

/**

Output
This function should be called in a javascript tag, or a file acting as a js file using the php header function,
as it will call to create_jsfunction, and the javascript function, to generate a string to return, which holds every
bit of the javascript side of things.
@return string All the javascript to be used by the script.

function output ()

{

$this -> javascript ();

foreach ( $this -> export as $function ) {

$final .= $this -> create_jsfunction ( $function , $this -> args );

}

$this -> return_javascript = $this -> return_javascript . $final ;

print $this -> return_javascript ;

}

if (!isset( $SAJAX_INCLUDED)) {

GLOBALS AND DEFAULTS

*/
$sajax_debug_mode = 0;
$sajax_export_list = array();
$sajax_request_type = "GET";
$sajax_remote_uri = "";

CODE

*/
function sajax_init() {
}

function sajax_get_my_uri() {
global $REQUEST_URI;

return $REQUEST_URI;
}

$sajax_remote_uri = sajax_get_my_uri();

function sajax_handle_client_request() {
global $sajax_export_list;

$mode = "";

if (! empty( $_GET["rs"]))
$mode = "get";

if (!empty( $_POST["rs"]))
$mode = "post";

if (empty( $mode))
return;

if ( $mode == "get") {
// Bust cache in the head
header ("Expires: Mon, 26 Jul 1997 05:00:00 GMT"); // Date in the past
header ("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
// always modified
header ("Cache-Control: no-cache, must-revalidate"); // HTTP/1.1
header ("Pragma: no-cache"); // HTTP/1.0
$func_name = $_GET["rs"];
if (! empty( $_GET["rsargs"]))
$args = $_GET["rsargs"];
else
$args = array();
}
else {
$func_name = $_POST["rs"];
if (! empty( $_POST["rsargs"]))
$args = $_POST["rsargs"];
else
$args = array();
}

if (! in_array( $func_name, $sajax_export_list))
echo "-: $func_name not callable";
else {
echo "+:";
$result = call_user_func_array( $func_name, $args);
echo $result;
}
exit;
}

function sajax_get_common_js() {
global $sajax_debug_mode;
global $sajax_request_type;
global $sajax_remote_uri;

$t = strtoupper( $sajax_request_type);
if ( $t != "GET" && $t != "POST")
return "// Invalid type: $t.. \n\n";

ob_start();

 1  
 2// remote scripting library   
 3// (c) copyright 2005 modernmethod, inc   
 4var sajax_debug_mode = ```
 5 echo $sajax_debug_mode ? "true" : "false"; 
 6```;   
 7var sajax_request_type = "```
 8 echo $t; 
 9```";   
10  
11function sajax_debug(text) {   
12if (sajax_debug_mode)   
13alert("RSD: " + text)   
14}   
15function sajax_init_object() {   
16sajax_debug("sajax_init_object() called..")   
17  
18var A;   
19try {   
20A=new ActiveXObject("Msxml2.XMLHTTP");   
21} catch (e) {   
22try {   
23A=new ActiveXObject("Microsoft.XMLHTTP");   
24} catch (oc) {   
25A=null;   
26}   
27}   
28if(!A &amp;&amp; typeof XMLHttpRequest != "undefined")   
29A = new XMLHttpRequest();   
30if (!A)   
31sajax_debug("Could not create connection object.");   
32return A;   
33}   
34function sajax_do_call(func_name, args) {   
35var i, x, n;   
36var uri;   
37var post_data;   
38  
39uri = "```
40 echo $sajax_remote_uri; 
41```";   
42if (sajax_request_type == "GET") {   
43if (uri.indexOf("?") == -1)   
44uri = uri + "?rs=" + escape(func_name);   
45else   
46uri = uri + "&amp;rs=" + escape(func_name);   
47for (i = 0; i &lt; args.length-1; i++)   
48uri = uri + "&amp;rsargs[]=" + escape(args[i]);   
49uri = uri + "&amp;rsrnd=" + new Date().getTime();   
50post_data = null;   
51} else {   
52post_data = "rs=" + escape(func_name);   
53for (i = 0; i &lt; args.length-1; i++)   
54post_data = post_data + "&amp;rsargs[]=" + escape(args[i]);   
55}   
56  
57x = sajax_init_object();   
58x.open(sajax_request_type, uri, true);   
59if (sajax_request_type == "POST") {   
60x.setRequestHeader("Method", "POST " + uri + " HTTP/1.1");   
61x.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");   
62}   
63x.onreadystatechange = function() {   
64if (x.readyState != 4)   
65return;   
66sajax_debug("received " + x.responseText);   
67  
68var status;   
69var data;   
70status = x.responseText.charAt(0);   
71data = x.responseText.substring(2);   
72if (status == "-")   
73alert("Error: " + data);   
74else   
75args[args.length-1](data);   
76}   
77x.send(post_data);   
78sajax_debug(func_name + " uri = " + uri + "/post = " + post_data);   
79sajax_debug(func_name + " waiting..");   
80delete x;   
81}   
82

$html = ob_get_contents();
ob_end_clean();
return $html;
}

function sajax_show_common_js() {
echo sajax_get_common_js();
}

// javascript escape a value
function sajax_esc( $val)
{
return str_replace('"', '\\\"', $val);
}

function sajax_get_one_stub( $func_name) {
ob_start();

1  
2// wrapper for ```
3 echo $func_name;

function x_``` echo $func_name;

1sajax_do_call("```
2 echo $func_name; 
3```",   
4x_```
5 echo $func_name; 
6```.arguments);   
7}   
8

$html = ob_get_contents();
ob_end_clean();
return $html;
}

function sajax_show_one_stub( $func_name) {
echo sajax_get_one_stub( $func_name);
}

function sajax_export() {
global $sajax_export_list;

$n = func_num_args();
for ( $i = 0; $i < $n; $i++) {
$sajax_export_list[] = func_get_arg( $i);
}
}

$sajax_js_has_been_shown = 0;
function sajax_get_javascript()
{
global $sajax_js_has_been_shown;
global $sajax_export_list;

$html = "";
if (! $sajax_js_has_been_shown) {
$html .= sajax_get_common_js();
$sajax_js_has_been_shown = 1;
}
foreach ( $sajax_export_list as $func) {
$html .= sajax_get_one_stub( $func);
}
return $html;
}

function sajax_show_javascript()
{
echo sajax_get_javascript();
}

$SAJAX_INCLUDED = 1;
}