Ajax problem (forbidden)

Jacek Czapla · February 12th, 2006, 6:56 PM

Hi.
I have a problem with Ajax. All my remote methods returns 403 code (request forbidden). Ajax app is very simple and it works on local server.
I tested my ajax app with JPSpan and HTML_AJAX (from Pear) implementation.
Is it Apache config specific? Should I set some vars in .htaccess?
Please help.

**mr_fern** · February 12th, 2006, 7:26 PM

From what I understand, you generally can't use a XMLHTTPRequest for remote files, the requests need to be on local files.

I'm probably what you could call something of an Ajax Dummy (i've only read about it and read through examples, haven't tried myself yet)

Share some of the code without any "sensitive" information for the script. I can generally help debug even if I can't program it myself

Jacek Czapla · February 12th, 2006, 7:48 PM

Thanks for reply.
An example:

There are 3 files on server:
server.php

Code:

<?php
session_start();


require_once 'JPSpan.php';
require_once JPSPAN.'Server/PostOffice.php';
require_once('class.php');

$S= & new JPSpan_Server_PostOffice();
$S->addHandler(new klasa());

if(isset($_SERVER['QUERY_STRING']) && strcasecmp($_SERVER['QUERY_STRING'], 'client')==0){
	$S->displayClient();
}else{
	$S->serve();
}
?>

This is AJAX server creation
$S->displayClient(); - this method returns js script for browser with classes.methods for communication, data serialisation etc.
$S->serve(); - ajax requests processing

buissines logic class - class.php

Code:

<?php
session_start();
class klasa{
	function k_write($word){
		$data=$_SESSION['data'];
		array_push($data, $word);
		$_SESSION['data']=$data;
		return $data;
	}
	
	function k_read(){
		$data=array('1', '2', '3');
		if(isset($_SESSION['data']))
			$data=$_SESSION['data'];
		return $data;
	}
}
?>

this class saves words to session and /or returns words array to browser

another file client.html (it can be viewed from http://demo.taksowka.net/dev/client.html)

In this file there are js methods, input field, div section for data displaing etc.

There is body onLoad function and after page loading we can see error message (403 forbidden). The message is generated by JPSpan class from XMLHTTPRequest status value (IMHO).

**mr_fern** · February 12th, 2006, 10:07 PM

When I go directly to this url http://demo.taksowka.net/dev/server.php
Without a query string, I get the following:

Fatal error: Invalid HTTP request method: GET in /home2/etaxi/public_html/demo/dev/JPSpan/Server/PostOffice.php on line 72

Jacek Czapla · February 13th, 2006, 6:55 AM

OK. Thanks. But I think it is not my problem because I use url like this

http://demo.taksowka.net/dev/server.php?client

with ?client at the end and this url correctly returns javascript client code for AJAX operations based on my buissnes logic class (class.php).

The same error (403 forbidden) I got with other PHP- AJAX library (HTML_AJAX).

medikoo · February 13th, 2006, 4:00 PM

I have problems understanding where exactly problem occurs.
What do you mean with:

Quote:

All my remote methods returns 403 code (request forbidden)

What do you name remote methods - php methods on server? js methods which should be pulled from file on server?
Do methods return 403 code (?!) or you get this error when you try to access file where this methods are placed?

Jacek Czapla · February 13th, 2006, 4:48 PM

Remote method (here) is php function (php class method) which is called by javascript function by XMLHTTPRequest. Local method is javascript function called in browser. Url called by xmlhttprequest looks like this:

http://domain.name.com/server.php?ph...s_method_name/

In php-ajax librarys like JPSpan or HTML_AJAX there is php server class and this class generates javascript client code (on special request in <script> tag) for calling (registered in server class) php functions by XMLHTTPRequest (similarly to XML-RPC). php server and generated javascript code can have many features built in (objects and arrays serialisation, exeption handling)

In my code on pass7 server every call of php method by javascript function returns 403 error.

I posted example code in previous messages.

Latest news:
I checked this again few minutes ago, and now it works. That's strange.

Thanks for spiritually help :-)

medikoo · February 13th, 2006, 5:06 PM

xmlHttp object is incapable to call any php method directly.
What it can do is send request to server and receive response as http document. I understand then.. that url (which has some request data) that your xmlHttp object is calling should force php to invoke some php methods on server. And problem is that calling that url with xmlHttp object returns 403 error (so php script is not called at all)
That's how I understand what's happening behind your classes.

403 error is I think privileges issues like browser is not allowed to execute script on server - that looks totally strange to me.. as if browser is forbiden to do so then you shouldn't be able to access that url from address bar as well.
Make sure what really is going on behind the scene.. what url is invoked? Do you get same error (403) when you try to access url from address bar?

Probably just changing access privileges on files that url points to should solve issue.

Jacek Czapla · February 13th, 2006, 5:33 PM

Quote:

Originally Posted by medikoo

xmlHttp object is incapable to call any php method directly.
...
That's how I understand what's happening behind your classes.

Exactly

Quote:

Originally Posted by medikoo

403 error is I think privileges issues like browser is not allowed to execute script on server - that looks totally strange to me.. as if browser is forbiden to do so then you shouldn't be able to access that url from address bar as well.
Make sure what really is going on behind the scene.. what url is invoked? Do you get same error (403) when you try to access url from address bar?

Well, I haven't tried. Now works fine and I don't know what happand.

URL is

http://demo.taksowka.net/dev/server.php?klasa/k_read

but it have to be sended by post method.

Quote:

Probably just changing access privileges on files that url points to should solve issue.

I checked this. First I set 644 then 777. Without results.

I'm pretty sure that is not code bug and like I wrote before now it works fine so I leave this out.

Thanks for interesting.

PS. English knowledge checking. Do you realy understand what am I writing?

February 12th, 2006, 6:56 PM	#1 (permalink)
Jacek Czapla Registered User Fresh Surpasser Joined in Aug 2004 Lives in Poland Hosted on pass7 21 posts Gave thanks: 0 Thanked 0 times	Ajax problem (forbidden) Hi. I have a problem with Ajax. All my remote methods returns 403 code (request forbidden). Ajax app is very simple and it works on local server. I tested my ajax app with JPSpan and HTML_AJAX (from Pear) implementation. Is it Apache config specific? Should I set some vars in .htaccess? Please help. __________________ Jacek Czapla<br/> pass60

February 12th, 2006, 7:26 PM	#2 (permalink)
mr_fern All Ur Base R Belong 2 Us Excelling Contributor Joined in Feb 2005 Lives in Vegas & New York 824 posts Gave thanks: 2 Thanked 6 times	From what I understand, you generally can't use a XMLHTTPRequest for remote files, the requests need to be on local files. I'm probably what you could call something of an Ajax Dummy (i've only read about it and read through examples, haven't tried myself yet) Share some of the code without any "sensitive" information for the script. I can generally help debug even if I can't program it myself __________________ Nobody doing nothing

February 12th, 2006, 7:48 PM	#3 (permalink)
Jacek Czapla Registered User Fresh Surpasser Joined in Aug 2004 Lives in Poland Hosted on pass7 21 posts Gave thanks: 0 Thanked 0 times	Thanks for reply. An example: There are 3 files on server: server.php Code: <?php session_start(); require_once 'JPSpan.php'; require_once JPSPAN.'Server/PostOffice.php'; require_once('class.php'); $S= & new JPSpan_Server_PostOffice(); $S->addHandler(new klasa()); if(isset($_SERVER['QUERY_STRING']) && strcasecmp($_SERVER['QUERY_STRING'], 'client')==0){ $S->displayClient(); }else{ $S->serve(); } ?> This is AJAX server creation $S->displayClient(); - this method returns js script for browser with classes.methods for communication, data serialisation etc. $S->serve(); - ajax requests processing buissines logic class - class.php Code: <?php session_start(); class klasa{ function k_write($word){ $data=$_SESSION['data']; array_push($data, $word); $_SESSION['data']=$data; return $data; } function k_read(){ $data=array('1', '2', '3'); if(isset($_SESSION['data'])) $data=$_SESSION['data']; return $data; } } ?> this class saves words to session and /or returns words array to browser another file client.html (it can be viewed from http://demo.taksowka.net/dev/client.html) In this file there are js methods, input field, div section for data displaing etc. There is body onLoad function and after page loading we can see error message (403 forbidden). The message is generated by JPSpan class from XMLHTTPRequest status value (IMHO). __________________ Jacek Czapla<br/> pass60

February 12th, 2006, 10:07 PM	#4 (permalink)
mr_fern All Ur Base R Belong 2 Us Excelling Contributor Joined in Feb 2005 Lives in Vegas & New York 824 posts Gave thanks: 2 Thanked 6 times	When I go directly to this url http://demo.taksowka.net/dev/server.php Without a query string, I get the following: Fatal error: Invalid HTTP request method: GET in /home2/etaxi/public_html/demo/dev/JPSpan/Server/PostOffice.php on line 72 __________________ Nobody doing nothing

February 13th, 2006, 6:55 AM	#5 (permalink)
Jacek Czapla Registered User Fresh Surpasser Joined in Aug 2004 Lives in Poland Hosted on pass7 21 posts Gave thanks: 0 Thanked 0 times	OK. Thanks. But I think it is not my problem because I use url like this http://demo.taksowka.net/dev/server.php?client with ?client at the end and this url correctly returns javascript client code for AJAX operations based on my buissnes logic class (class.php). The same error (403 forbidden) I got with other PHP- AJAX library (HTML_AJAX). __________________ Jacek Czapla<br/> pass60

February 13th, 2006, 4:48 PM	#7 (permalink)
Jacek Czapla Registered User Fresh Surpasser Joined in Aug 2004 Lives in Poland Hosted on pass7 21 posts Gave thanks: 0 Thanked 0 times	Remote method (here) is php function (php class method) which is called by javascript function by XMLHTTPRequest. Local method is javascript function called in browser. Url called by xmlhttprequest looks like this: http://domain.name.com/server.php?ph...s_method_name/ In php-ajax librarys like JPSpan or HTML_AJAX there is php server class and this class generates javascript client code (on special request in <script> tag) for calling (registered in server class) php functions by XMLHTTPRequest (similarly to XML-RPC). php server and generated javascript code can have many features built in (objects and arrays serialisation, exeption handling) In my code on pass7 server every call of php method by javascript function returns 403 error. I posted example code in previous messages. Latest news: I checked this again few minutes ago, and now it works. That's strange. Thanks for spiritually help :-) __________________ Jacek Czapla<br/> pass60 Last edited by Jacek Czapla; February 13th, 2006 at 5:00 PM.

February 13th, 2006, 5:06 PM	#8 (permalink)
medikoo Registered User Seasoned Poster Joined in Jun 2004 Lives in Warsaw, Poland Hosted on saprus 69 posts Gave thanks: 0 Thanked 1 Time in 1 Post	xmlHttp object is incapable to call any php method directly. What it can do is send request to server and receive response as http document. I understand then.. that url (which has some request data) that your xmlHttp object is calling should force php to invoke some php methods on server. And problem is that calling that url with xmlHttp object returns 403 error (so php script is not called at all) That's how I understand what's happening behind your classes. 403 error is I think privileges issues like browser is not allowed to execute script on server - that looks totally strange to me.. as if browser is forbiden to do so then you shouldn't be able to access that url from address bar as well. Make sure what really is going on behind the scene.. what url is invoked? Do you get same error (403) when you try to access url from address bar? Probably just changing access privileges on files that url points to should solve issue. __________________ medikoo.comvps mariusznsaprus www.medikoo.com

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