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+--- Thread: determining the address of the server? (/showthread.php?tid=79955)
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determining the address of the server? - richb201 - 08-23-2021
The way my app has been designed is that each server has a copy of wordpress, copy of the application, and a copy of the fusionAuth server. When a user reaches my website, researchStudyOnline.com, the AWS load balancer determines which server will be handling this request by displaying my landing page. My landing page has a button: Login to Research Study Online. This will bring them to my app at a certain URL on that server.
On my laptop "server" the address of the server is localhost. So to login they get sent to localhost/index.php/Login.
Bur how will this work on my AWS server? Will localhost still be the local server or will I use xx.xx.xx.xx/index.php/Login?
RE: determining the address of the server? - InsiteFX - 08-24-2021
On live servers localhost is usually used for MySQL servers so you would need to use the full url address.
RE: determining the address of the server? - richb201 - 08-24-2021
There is a problem. Each server (this is designed to handle a few) will have a different address. But the code running on all of them is the same. I'm seeking a CI function that returns the IP of the current server. Then I can use a var called server_address instead of the hard coded address.
RE: determining the address of the server? - John_Betong - 08-24-2021
@richb201,
Try experimenting with the following to find the Server parameters. I would also prevent rendering the details unless a certain $_GET value is verified to prevent others from seeing sensitive server information.
PHP Code:
// pre adds line-feeds for easier readability
echo '<pre>'; print_r( $_SERVER ); echo '</pre>';
RE: determining the address of the server? - richb201 - 08-25-2021
Thx. I tried this:
$IP=$_SERVER[SERVER_ADDR];
$IP is 172.19.0.3
But when I try typing that URL in the browser (on my laptop), I get
This site can’t be reached
RE: determining the address of the server? - John_Betong - 08-25-2021
I think the SERVER_ADDR parameter applies to the Internet Service Provider.
Try the REQUEST_URI parameter.
RE: determining the address of the server? - richb201 - 08-25-2021
I tried $IP=$_SERVER[REQUEST_URI];
and this yields
/index.php/Configure/index
RE: determining the address of the server? - captain-sensible - 08-25-2021
on my local dev I have a web dev thats configured to be served on 127.0.0.2
if i put this code in a controller :
Code:
$IP2= strval($_SERVER['SERVER_ADDR']);
echo $IP2;it correctly returns 127.0.0.2
RE: determining the address of the server? - John_Betong - 08-25-2021
@rich2b01,
I have a similar app that at the user point of entry tests for the environment URL, defines a constant then requires a common application. The common application uses the defined constant and sets the relevant MySQL database tables, paths, etc.
RE: determining the address of the server? - InsiteFX - 08-26-2021
He is on AWS and some people have reported problems trying to get the host address see below.
PHP Code:
// From PHP.net - gethostbyaddr()
if the user is sitting behind a proxy server, you can do this;
if ($HTTP_SERVER_VARS["HTTP_X_FORWARDED_FOR"] != "") {
$IP = $HTTP_SERVER_VARS["HTTP_X_FORWARDED_FOR"];
$proxy = $HTTP_SERVER_VARS["REMOTE_ADDR"];
$host = @gethostbyaddr($HTTP_SERVER_VARS["HTTP_X_FORWARDED_FOR"]);
} else {
$IP = $HTTP_SERVER_VARS["REMOTE_ADDR"];
$host = @gethostbyaddr($HTTP_SERVER_VARS["REMOTE_ADDR"]);
}
You should be careful in the use of $_SERVER['HTTP_X_FORWARDED_FOR'], as I discovered,
once using Amazon AWS's Elastic Load Balancer's, this value may be a comma separated list
of IP addresses and will thusly not compare as conceived in almost every example I have
seen posted by users in the comments.