Is it possible to redirect a user to a php page and then redirect to different image, if the user is requesting for the image ?
For example if user requests for the image or if other website requests for the image, it should be redirected to the php page and then redirected to a different image.
Like if other website requests for http://example.com/images/a.gif, the website will get a different image i.e. http://example.com/images/b.gif.
Is it possible? Let me know if I am not clear with my problem.
Thanks.
Looks like a use case for mod rewrite
with something like:
RewriteRule /images/(.*).gif$ images.php?img=$1
Do you mean you want to redirect to a different image, if the request comes from outside your site? Then you need apache's mod_rewrite, and rules something like this:
RewriteEngine on
RewriteCond %{HTTP_REFERER} !^http://your\.site\.com/ [NC]
RewriteRule a.gif b.gif [L,R]
It means: if the referer is not a part of your site, rewrite every request to a.gif to b.gif.
The RewriteRule specified above would be best, if you're using Apache. You could do it either via the server's config files or through a .htaccess rule if your server supports it. For more info, look to Apache's modrewrite page (for version 2.2): http://httpd.apache.org/docs/2.2/mod/mod_rewrite.html
If you're using IIS or another web server, they all allow similar redirects, they just have different ways of implementing them.
Related
I have a blog with images. I do not want that the images are directly accessible through the URL (and also not for Googlebot and other bots)... for example... mysite.com/assets/images/img1... etc. So I thought to password protect the images directory with .htaccess. That worked, only front-end all my images became links, and I had to provide my credentials to make them show. How can I make my images show yet NOT make them directly accessible when typing the corresponding URL and the images URLs (or better yet the images directory) NOT accesible for bots to crawl/index?
Don't go with password protection. The right way to do it would be to filter the requests based on the referer URL. If the request originates from your own site then it's ok. Otherwise the request is trying to get an image directly.
I've found this site with detailed instructions on how to do that: http://altlab.com/htaccess_tutorial.html
Taken from the mentioned site:
RewriteEngine On
RewriteCond %{HTTP_REFERER} !^http://(.+\.)?mysite\.com/ [NC]
RewriteCond %{HTTP_REFERER} !^$
RewriteRule .*\.(jpe?g|gif|bmp|png)$ http://url_to_default_image.gif [L]
Note that you would have to enable mod_rewrite in your Apache server.
Btw, just asking. Why don't just let people get the image directly if they want to?
I'm trying to display SEO friendly URLs by using a rewrite in our .htaccess file, but I can't get it to work (I've researched many of the related topics on StackExhange and elsewhere, but to no avail). I'd like to get the value of the id on this page...
http://199.119.123.135/info/tool_surety_company.php?id=1
...and display the id value in the URL instead of the ugly "tool_surety_company.php?id=1".
I'm going for a result like this: http://199.119.123.135/info/travelers-group
I'm using the following code in my .htaccess file:
RewriteCond %{THE_REQUEST} \ /+info/tool_surety_company\.php\?id=([^&]+)
RewriteRule ^ /info/%1/? [L,R]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^^info/([^/]+)/?$ /info/tool_surety_company.php?id=$1 [QSA]
But I'm receiving a 404 error.
Any ideas? Thanks in advance!
There might be something I'm misunderstanding here but I believe there would need to be a mechanism on the server side code to load the correct content for the new "seo-friendly url". In other words, sure, you can redirect the user to show a different url but how is the server going to know what content to load for that new url?
Here's a good resource for putting together a simple example.
https://moz.com/ugc/using-mod-rewrite-to-convert-dynamic-urls-to-seo-friendly-urls
Update:
From here - https://mediatemple.net/community/products/dv/204643270/using-htaccess-rewrite-rules
TROUBLESHOOTING
404 Not Found
Examine the new URL in your browser closely. Does it match a file that
exists on the server in the new location specified by the rewrite
rule? You may have to make your rewrite rule more broad (you may be
able to remove the $1 from the second string). This will direct
rewrites to the main index page given in the second string. Or, you
may need to copy files from your old location to the new location.
In other words, the only reason you would be getting a 404 is because the server does not find the file that is requested as defined in the URL visible in your browser address bar.
Htaccess Rewrites are enabled by using the Apache module mod_rewrite,
which is one of the most powerful Apache modules and features
availale. Htaccess Rewrites through mod_rewrite provide the special
ability to Rewrite requests internally as well as Redirect request
externally.
When the url in your browser's location bar stays the same for a
request it is an internal rewrite, when the url changes an external
redirection is taking place. This is one of the first, and one of the
biggest mental-blocks people have when learning about mod_rewrite.
More info from here:
http://www.askapache.com/htaccess/modrewrite-tips-tricks.html
I have iframe based facebook app, I just want to do is that whenever someone hits the application url directly http://mysite.com must be redirect to my facebook canvas url for this app say http://apps.facebook.com/mysite. This seems pretty easy but unfortunately its not clicking in my mind
any help would be appreciated
EDIT
the application is in codeigniter
EDIT
htaccess
RewriteEngine on
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule .* index.php/$0 [PT,L]
php_value error_reporting 7
php_flag display_errors On
php_value auto_prepend_file prepend.php
say my domain is
http://abc.com/mysitefolder
my facebook app link is
http://apps.facebook.com/myappname
please consider http and https conversion too
also guyz one suggestion too as you see am using prepend in htaccess its just to get the user timezone for some date time stuff, is this fine am using it this way? the file actually sets a cookie for a user on very first visit to the site per session
Best Regards
Junaid
Any canvas page for an app that comes from Facebook will have $_REQUEST['signed_request'] defined. You could check for the existence of this request variable and if it is not set, redirect to Facebook.
well as far as i know there isn't any server side coding to do so... then again how could there be since it's all happening on the frontside of things what you could do is using javascript like so
if(window!=window.top){i am iframed now redirect or w/e you wanna do}
Since you want to redirect the domain name to the app, not the other way around, the fact that the app is in an iFrame isn't relevant.
The best way to do it is using .htaccess, in my opinion. This means that you can use custom URLs such as mydomainname.com/mypagename/, which would redirect to apps.facebook.com/myappname/mypagename/, so you can advertise your app easier. Another benefit is that you don't have to rely on Javascript. Some people (very small amount) have it turned off, but why parse all the PHP code to do it?
So, what you can do is have the root domain "blank" and only include the following in your .htaccess file:
RewriteEngine on
RewriteRule ^$ http://www.mydomainname.com/ [R=301,L,QSA]
RewriteRule ^/(.*) http://www.mydomainname.com/$1 [R=301,L,QSA]
QSA will also attach query parameters to the destination URL, such as "?ref=email".
Of course, if you keep the app code on the same domain, in the root, you don't really need to do anything, just tweak your authentification code.
If this doesn't work for you, please give us more details:
Where does the app "live"
If the app sits in the mydomainname.com, what happens when you access the URL directly?
How do you do the authentification?
Code helps, obviously.
Unless mydomainname.com isn't specific for the app, I'd recommend hosting the actual app on a subdomain. Actually, regardless, should help you organize. Or you might want to make the app accesibile as a website as well, with a Facebook login option.
Cheers
When I open my site without "www", like http://mysite.com/, then there is a problem with my website hit counter on the home page, which is done through AJAX.
The problem is that counter Image is not getting displayed.
It is showing blank.
There are similar problem on other pages where I have used AJAX to retrieve data.
To the cross-domain security policy, "mysite.com" and "www.mysite.com" are different domains, therefore AJAX requests aren't allowed between them.
The simplest solution is to take the domain out of your AJAX call and use a relative url, for example "/dir/ajax-callback.php" instead of "http://www.mysite.com/dir/ajax-callback.php"
You can create .htaccess file in your root dir and put this text inside
RewriteEngine on
RewriteCond %{HTTP_HOST} ^mysite.com [NC]
RewriteRule ^(.*)$ http://www.mysite.com/$1 [L,R=301]
This will make sure that every time user enters http://mysite.com, it gets redirected to http://www.mysite.com
The server has to support .htaccess and mod_rewrite
I have two different domains that both point to my homepage in the same server.
I want to log every single access made to my homepage and log which domain the user used to access my homepage, how can I do this?
I tried mod_rewrite in Apache and logging to a MySQL database with PHP but all I could do was infinite loops.
Any ideas?
EDIT:
By your answers, I see you didn't get what I want...
As far as I know Google Analytics does not allow me to differentiate the domain being used if they both point to the same site and it also does not allow me to see that some files like images were accessed directly instead of through my webpages.
I can't also just use $_SERVER['HTTP_HOST'] cause like I just said, I want to log EVERYTHING, like images and all other files, every single request, even if it doesn't exist.
As for Webalizer, I never saw it differentiate between domains, it always assumes the default domain configure in the account and use that as root, it doesn't even display it. I'll have to check it again, but I'm not sure it will do what I want...
INFINITE LOOP:
The approach I tried involved rewriting the urls in Apche with a simple Rewrite rule pointing to a PHP script, the PHP script would log the entry into a MySQL database and the send the user back to the file with the header() function. Something like this:
.htaccess:
RewriteCond %{HTTP_HOST} ^(www\.)?domain1\.net [NC]
RewriteRule ^(.*)$ http://www.domain1.net/logscript?a=$1 [NC,L]
RewriteCond %{HTTP_HOST} ^(www\.)?domain2\.net [NC]
RewriteRule ^(.*)$ http://www.domain2.net/logscript?a=$1 [NC,L]
PHP Script:
$url = $_GET['a'];
$domain = $_SERVER['HTTP_HOST'];
// Code to log the entry into the MySQL database
header("Location: http://$domain/$url");
exit();
So, I access some file, point that file to the PHP script and the script will log and redirect to that file... However, when PHP redirects to that file, the htaccess rules will pick it up and redirect again too the PHP script, creating an infinite loop.
The best thing do would be to parse the server logs. Those will show the domain and request. Even most shared hosting accounts provide access to the logs.
If you're going to go the rewrite route, you could use RewriteCond to check the HTTP_REFERER value to see if the referer was a local link or not.
RewriteCond %{HTTP_HOST} ^(www\.)?domain1\.net [NC]
RewriteCond %{HTTP_REFERER} !^(.*)domain1(.*)$ [NC]
RewriteRule ^(.*)$ http://www.domain1.net/logscript?a=$1 [NC,L]
RewriteCond %{HTTP_HOST} ^(.*)domain2\.net [NC]
RewriteCond %{HTTP_REFERER} !^(.*)domain2(.*)$ [NC]
RewriteRule ^(.*)$ http://www.domain2.net/logscript?a=$1 [NC,L]
You may also want to post in the mod_rewrite forum. They have a whole section about handling domains.
If Google Analytics is not your thing,
$_SERVER['HTTP_HOST']
holds the domain that is used, you can log that (along with time, browser, filepath etc). No need for mod_rewrite I think. Check print_r($_SERVER) to see other things that might be interesting to log.
Make sure to still escape (mysql_real_escape_string()) all the log values, it's trivially easy to inject SQL via the browser's user-agent string for example.
So, I access some file, point that file to the PHP script and the script will log and redirect to that file... However, when PHP redirects to that file, the htaccess rules will pick it up and redirect again too the PHP script, creating an infinite loop.
Can you check for HTTP headers in the RewriteCond? If so, try setting an extra header alongside the redirect in PHP (by convention custom HTTP headers start with 'X-' so it could be header('X-stayhere: 1');), and if the X-stayhere header is present, the RewriteCond fails and it doesn't forward the browser to the PHP script.
If, however, you can cron a script to download the server logs and run them through some freeware logfile analyzer, I'd go with that instead. Having two redirects for every request is a fair bit of overhead.. (and if I was more awake I might be able to come up with different solutions)
Does Google Analytics not provide this option? Or could you not parse your server log files?
Why not use the access log facility build in apache?
Apache have a "piped log" function that allow you redirect the access log to any program.
CustomLog "|/path/to/your/logger" common