Removed final slash from FRACTAL_SERVER_HOST environment variable

Author: zonia3000

docs/environment-variables.md

@@ -4,7 +4,7 @@ The following environment variables can be used to configure fractal-web.
 
 > Only when using `npm run dev` or `npm run preview` these variables are automatically read from `.env.development` and `.env` files. In production they must be set in the shell that starts the node process.
 
-* `FRACTAL_SERVER_HOST`: represents the URL of the fractal-server application (e.g. http://localhost:8000, or http://subdomain.example.org:8000); this variable is **required** and it should not contain a final slash;
+* `FRACTAL_SERVER_HOST`: represents the URL of the fractal-server application (e.g. http://localhost:8000, or http://subdomain.example.org:8000); this variable is **required**;
 * `AUTH_COOKIE_NAME`: the name of the cookie used to store the user session; the default value is `fastapiusersauth`;
 * `AUTH_COOKIE_DOMAIN`: specifies which server can receive the cookie; **remember to set it in production**;
 * `AUTH_COOKIE_PATH`: the URL path where the cookie will be available; the default value is `/`;

src/hooks.server.js

@@ -58,6 +58,10 @@ export async function handleFetch({ event, request, fetch }) {
 	2. https://kit.svelte.dev/docs/hooks#server-hooks-handlefetch
 	*/
 
+	if (env.FRACTAL_SERVER_HOST.endsWith('/')) {
+		env.FRACTAL_SERVER_HOST = env.FRACTAL_SERVER_HOST.substring(0, env.FRACTAL_SERVER_HOST.length - 1);
+	}
+
 	if (request.url.startsWith(env.FRACTAL_SERVER_HOST)) {
 		logger.trace('Including cookie into request to %s, via handleFetch', request.url);
 		const cookie = event.request.headers.get('cookie');