From 1dfe0fc6034cf48b4c6d844766c07a242a8e6aa6 Mon Sep 17 00:00:00 2001
From: Philipp <admin@philipp.info>
Date: Sun, 25 Dec 2022 20:43:08 +0100
Subject: [PATCH] adapt examples

---
 mods/sample-nginx-reverse-proxy.config | 20 ++++++++++++++++++++
 mods/sample-nginx.config               | 22 ++++++++++++++++++++++
 2 files changed, 42 insertions(+)

diff --git a/mods/sample-nginx-reverse-proxy.config b/mods/sample-nginx-reverse-proxy.config
index afc74dfc4..e5faa6403 100644
--- a/mods/sample-nginx-reverse-proxy.config
+++ b/mods/sample-nginx-reverse-proxy.config
@@ -15,6 +15,25 @@
 # -----
 ...
 
+
+##
+# by https://syshero.org/2018-04-13-nginx-unique-request-identifier/
+# if X-Request-ID is set, NGINX will forward the same value to the next upstream
+# if the header is not set, NGINX will generate a random request identifier and add it to the request.
+#
+# To guarantee backward compatibility, map to format the $request_id variable to a format that matches any old setups.
+##
+
+map $request_id $formatted_id {
+  "~*(?<p1>[0-9a-f]{8})(?<p2>[0-9a-f]{4})(?<p3>[0-9a-f]{4})(?<p4>[0-9a-f]{4})(?<p5>.*)$" "${p1}-${p2}-${p3}-${p4}-${p5}";
+}
+
+map $http_x_request_id $uuid {
+  default   "${request_id}";
+  ~*        "${http_x_request_id}";
+}
+
+
 server {
 
 	...
@@ -30,6 +49,7 @@ server {
 		proxy_set_header Host $host;
 		proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
 		proxy_set_header Forwarded "for=$proxy_add_x_forwarded_for; proto=$scheme";
+		proxy_set_header X-Request-ID $uuid;
 	}
 
 	...
diff --git a/mods/sample-nginx.config b/mods/sample-nginx.config
index 5530bfaef..88edf1916 100644
--- a/mods/sample-nginx.config
+++ b/mods/sample-nginx.config
@@ -20,6 +20,24 @@
 # http://wiki.nginx.org/Configuration
 ##
 
+##
+# by https://syshero.org/2018-04-13-nginx-unique-request-identifier/
+# if X-Request-ID is set, NGINX will forward the same value to the next upstream
+# if the header is not set, NGINX will generate a random request identifier and add it to the request.
+#
+# To guarantee backward compatibility, map to format the $request_id variable to a format that matches any old setups.
+##
+
+map $request_id $formatted_id {
+  "~*(?<p1>[0-9a-f]{8})(?<p2>[0-9a-f]{4})(?<p3>[0-9a-f]{4})(?<p4>[0-9a-f]{4})(?<p5>.*)$" "${p1}-${p2}-${p3}-${p4}-${p5}";
+}
+
+map $http_x_request_id $uuid {
+  default   "${request_id}";
+  ~*        "${http_x_request_id}";
+}
+
+
 ##
 # This configuration assumes your domain is example.net
 # You have a separate subdomain friendica.example.net
@@ -80,6 +98,9 @@ server {
   client_max_body_size 20m;
   client_body_buffer_size 128k;
 
+  # add the request id header to show it in the HTTP header output
+  add_header X-Request-ID $uuid;
+
   # rewrite to front controller as default rule
   location / {
     try_files $uri /index.php?pagename=$uri&$args;
@@ -125,6 +146,7 @@ server {
     include fastcgi_params;
     fastcgi_index index.php;
     fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
+    fastcgi_param HTTP_X_REQUEST_ID $uuid;
 		
     fastcgi_buffers 16 16k; 
     fastcgi_buffer_size 32k;