How to Set an Environment Variable for a Process Spawned by the Webserver

debianenvironment-variableslighttpd

In my setup (debian etch, lighttpd), one one my websites is calling a program for some image manipulation via PHP, I think. I'd like to change the behavior of this program by setting an environment variable, preferably without changing the web app.

How to do this? =)

Setting the environemt variable for all processes owned by the www-data user would be ok, too, but I am usure if an entry in, say, .bashrc(?) would be respected in this scenario.

Thanks!

Best Answer

Since you are using lighttpd fast-cgi, just set it using bin-environment within the lighttpd settings.

## Start an FastCGI server for php (needs the php5-cgi package)
fastcgi.server    = ( ".php" => 
    ((
            "bin-path" => "/usr/bin/php-cgi",
            "socket" => "/tmp/php.socket",
            "max-procs" => 2,
            "idle-timeout" => 20,

            "bin-environment" => ( 
                    "PHP_FCGI_CHILDREN" => "4",
                    "PHP_FCGI_MAX_REQUESTS" => "10000",

            ),

            "bin-copy-environment" => (
                    "PATH", "SHELL", "USER"
            ),
            "broken-scriptfilename" => "enable"
    ))
)

Related Solutions

Windows – How to Add a Windows Environment Variable Without Rebooting

Changes to environment variables should take effect immediately, if you make the change via the main Properties dialog for the computer in question (go to My Computer | Properties | Advanced | Environment Variables). After the changes are saved, Explorer broadcasts a WM_SETTINGCHANGE message to all windows to inform them of the change. Any programs spawned via Explorer after this should get the updated environment, although already-running programs will not, unless they handle the setting change message.

I'm not able to tell from your problem description what specific problem you're having with this. Can you tell us more about the specific scenario that isn't working?

This KB article may also be of use: How to propagate environment variables to the system

Nginx – Handling http and https requests using a single port with nginx

According to wikipedia article on status codes, Nginx has a custom error code when http traffic is sent to https port(error code 497)

And according to nginx docs on error_page, you can define a URI that will be shown for a specific error.
Thus we can create a uri that clients will be sent to when error code 497 is raised.

nginx.conf

#lets assume your IP address is 89.89.89.89 and also that you want nginx to listen on port 7000 and your app is running on port 3000

server {
    listen 7000 ssl;
 
    ssl_certificate /path/to/ssl_certificate.cer;
    ssl_certificate_key /path/to/ssl_certificate_key.key;
    ssl_client_certificate /path/to/ssl_client_certificate.cer;

    error_page 497 301 =307 https://89.89.89.89:7000$request_uri;

    location / {
        proxy_pass http://89.89.89.89:3000/;

        proxy_pass_header Server;
        proxy_set_header Host $http_host;
        proxy_redirect off;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-Protocol $scheme;
    }
}

However if a client makes a request via any other method except a GET, that request will be turned into a GET. Thus to preserve the request method that the client came in via; we use error processing redirects as shown in nginx docs on error_page

And thats why we use the 301 =307 redirect.

Using the nginx.conf file shown here, we are able to have http and https listen in on the same port

Best Answer

Related Solutions

Windows – How to Add a Windows Environment Variable Without Rebooting

Nginx – Handling http and https requests using a single port with nginx

nginx.conf

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