POC: Rename auth-request

Author: nginx-jack

exampleSite/content/njs/_index.md

@@ -11,4 +11,4 @@ Below you will find NJS examples, which you can tweak and run in your browser.
 
 - [Basic Example](basic-example) - Return "Hello!" for all requests
 - [Echo Server](echo-server) - Returns a `JSON` version of the request you just sent
-- [Magic AI](magic-ai-thing) - WIP - Something to do with AI
+- [Choose Upstream](choose-upstream) - Selects an upstream based on query param content

exampleSite/content/njs/auth-request.md

@@ -0,0 +1,59 @@
+---
+description: Choose Upstream
+title: Choose Upstream
+weight: 100
+---
+
+In this example, when a client sends a request to the `/` endpoint, NGINX calls the `chooseUpstream` function. This function reads the token from the request's query string and then selects the appropriate backend server based on the token's value. If the token does not match a known value, the function returns a 404 error.
+
+```nginx
+load_module modules/ngx_http_js_module.so;
+
+http {
+    js_import choose_upstream.js;
+
+    server {
+        listen 80;
+
+        location /secure/ {
+            auth_request /fetch_upstream;
+            auth_request_set $backend $upstream_http_x_backend;
+
+            proxy_pass http://$backend;
+        }
+
+        location /fetch_upstream {
+            internal;
+
+            proxy_pass http://127.0.0.1:8079;
+            proxy_pass_request_body off;
+            proxy_set_header Content-Length "";
+            proxy_set_header X-Original-URI $request_uri;
+        }
+
+    }
+
+    server {
+        listen 127.0.0.1:8079;
+
+        location / {
+            js_content main.chooseUpstream;
+        }
+
+    }
+
+    server {
+        listen 127.0.0.1:8081;
+        return 200 "BACKEND A:$uri\n";
+    }
+
+    server {
+        listen 127.0.0.1:8082;
+        return 200 "BACKEND B:$uri\n";
+    }
+
+}
+```
+
+
+{{< njs-playground exampleNJS=chooseUpstream.js fnName=chooseUpstream >}}

exampleSite/content/njs/choose-upstream.md

@@ -1,4 +1,4 @@
-function choose_upstream(r) {
+function chooseUpstream(r) {
     let backend;
 
     let uriParts = r.headersIn['X-Original-URI'].split('?');
@@ -30,4 +30,4 @@ function choose_upstream(r) {
 }
 
 // uncomment for us in NJS
-// export default { choose_upstream };
+// export default { chooseUpstream };

exampleSite/static/njs/auth_request.js renamed to exampleSite/static/njs/chooseUpstream.js

@@ -9,7 +9,6 @@ function echo(r) {
 		requestText,
 	} = r;
 
-	// Construct the echo response (JSON format)
 	const response = {
 		method,
 		uri,