jQuery JSON validation for username before continuing with Facebook registration...-VBForums
Results 1 to 3 of 3

Thread: jQuery JSON validation for username before continuing with Facebook registration...

  1. #1

    Thread Starter
    Frenzied Member wpearsall's Avatar
    Join Date
    Feb 2002
    Location
    England / UK
    Posts
    1,065

    jQuery JSON validation for username before continuing with Facebook registration...

    OK, heres the thing...

    I am integrating facebook login into my website... Its all working, except i have yet to validate the fields on the registration form.

    ie: all of the following work...
    Facebook login,
    facebook registration


    the only problem being -> if the username is taken on my server, the registration errors...
    However, facebook thinks that the user is registered still... so it wont direct to the register page, but instead login, I set the cookie for the user (or attempt to) but validation says its not a valid user so wont accept the login... and it can become a big circle... etc

    so i found out about the async validation...

    and it seems to work ok... except it says my json return is causing a parse error...

    my PHP webcode:
    PHP Code:

    function CheckUsername($reqname){
        global 
    $facebook$clsUser$dbi$user_prefix$prefix;
            
        
    $result sql_query("SELECT user_id, facebook, email_address, password FROM ".$user_prefix
                        
    ."user_account WHERE username='".addslashes($reqname)."'",$dbi);    
        
        if(
    sql_num_rows($result,$dbi)>0){
            
    $data "Taken";
            
        } else {
            
    $data "Free";
            
        }
        
    header("Content-Type: application/json");
                  
    // tried it with and without the [ square brackets...
        
    echo "[{\n";
        echo 
    "\"username\": ".json_encode($data)."\n";
        echo 
    "}]";
        exit;

    which outputs (as a download file... due to the content headers)

    Code:
    {
    "username": "Taken"
    }

    the json request is:

    Code:
    <script src="http://code.jquery.com/jquery-1.7.1.min.js" type="text/javascript"></script>
    <script type="text/javascript"> 
    function validate_async(form, cb) {
    	
    	console.log("We are in the validate_async box...");
    	
    	//if(form.username.length<3){
    	//	console.log("the username length is less than 3 chars");
    	//	cb("username: Username length must be longer than 3 chars.");
    	
    	//}else{	
    	
    			// TODO: check password is ok before proceeding...
    			
    			console.log("Fetching the username '"+form.username+"'");	
    			
    			$.getJSON('http://domain.com/member/fb_login.php?op=CheckUsername&username=' + form.username,
    				function(response) {
    					console.log( "first finish routine? ");		
    				})
    			.done(function(response) { 
    				console.log( "second success ( .done() )" );
    				
    				console.log("We are checking the response...'"+response.username+"'");
    				
    				if (response.username == "Free") {
    					// Username isn't taken, let the form submit
    					//cb();
    					
    					console.log("error is true???");	
    					
    					//call back
    					cb();
    				}
    				
    				console.log("We are displaying username error...");
    				cb({username: 'That username is taken, Sorry!'});
    			
    				 
    			})
    			.fail(function(response, textstatus, errorresult) { 
    				console.log( "error ( .fail() ) response: " +response );
    				console.log( "error ( .fail() ) textstatus: " +textstatus );
    				console.log( "error ( .fail() ) errorresult: " +errorresult ); 
    				cb({username: 'We failed to check the username...'});
    				
    			})
    			.always(function(response) { 
    				console.log( "complete ( .always() )" ); 
    				
    			});
    
    	//}		
    	console.log("exiting the validate_async");
    }
    </script> 
    
    <div style="float:right;">
    	<div class="fb-registration" data-fields='[
        				{"name":"name"},
                        {"name":"first_name"},
                        {"name":"last_name"},
                        {"name":"email"},
                        {"name":"location"},
                        {"name":"username","description":"Username for our website","type":"text"},
                        {"name":"password"},
                        {"name":"captcha"},
                        {"name":"newsletter","description":"Subscribe to our newsletter?","type":"checkbox"}
                        ]' 
            data-redirect-uri="<?php echo FB_SITEBASE; ?>/members/fb_login.php?op=do_register"
          width="300" onvalidate="validate_async">
        </div></div>
    the webpage itself works... - ive tried it using browser, and tested the output on a validator which says its ok...

    but, the output on my console is:


    LOG: We are in the validate_async box...
    LOG: Fetching the username 'eee'
    LOG: exiting the validate_async
    LOG: error ( .fail() ) response: [object Object]
    LOG: error ( .fail() ) textstatus: parsererror
    LOG: error ( .fail() ) errorresult: [object Error]
    LOG: complete ( .always() )
    LOG: We are in the validate_async box...
    LOG: Fetching the username 'eee'
    LOG: exiting the validate_async
    LOG: error ( .fail() ) response: [object Object]
    LOG: error ( .fail() ) textstatus: parsererror
    LOG: error ( .fail() ) errorresult: [object Error]
    LOG: complete ( .always() )
    anyone got any ideas?
    Last edited by wpearsall; May 6th, 2013 at 11:18 PM.
    Wayne

  2. #2

    Thread Starter
    Frenzied Member wpearsall's Avatar
    Join Date
    Feb 2002
    Location
    England / UK
    Posts
    1,065

    Re: jQuery JSON validation for username before continuing with Facebook registration.

    ahh crap... how stupid do i feel after about five hours of coding...

    turns out... my url was wrong - my URL should of been "/members/" not "/member/" ...

    however... - > how do i get the username text using this json from the response...? cheers
    Wayne

  3. #3
    Freelancer akhileshbc's Avatar
    Join Date
    Jun 2008
    Location
    Trivandrum, Kerala, India
    Posts
    7,572

    Re: jQuery JSON validation for username before continuing with Facebook registration.

    PHP Code:
        //...

        
    if(sql_num_rows($result,$dbi)>0){
            
    $data['username'] = "Taken";
            
        } else {
            
    $data['username'] = "Free";
            
        }
        
    header("Content-Type: application/json");
        echo 
    json_encode($data);  
        exit;

       
    //.... 
    See if this helps.

    If my post was helpful to you, then express your gratitude using Rate this Post.
    And if your problem is SOLVED, then please Mark the Thread as RESOLVED (see it in action - video)
    My system: AMD FX 6100, Gigabyte Motherboard, 8 GB Crossair Vengance, Cooler Master 450W Thunder PSU, 1.4 TB HDD, 18.5" TFT(Wide), Antec V1 Cabinet

    Social Group: VBForums - Developers from India

    Skills: PHP, MySQL, jQuery, VB.Net, VB6, Photoshop...

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  



Featured


Click Here to Expand Forum to Full Width

Survey posted by VBForums.