nginx: keep an explicit .txt location so /robots.txt works for curl

Dropping the .txt location made the curl/wget suffix map apply to every
request, so /robots.txt was looked up as /robots.txt.txt and 404'd. Keep the
location, but without add_header, so mime.types and charset cover the type
and the server-level security headers are still inherited.

1 files changed, 8 insertions, 0 deletions

diff --git a/nginx.conf b/nginx.conf
index a7e345a..d8a15ca 100644
--- a/nginx.conf
+++ b/nginx.conf
@@ -89,6 +89,14 @@ server {
             =404;
     }
 
+    # Direct .txt requests must bypass the curl/wget suffix map, otherwise a
+    # request for /robots.txt is looked up as /robots.txt.txt. No add_header
+    # here: mime.types supplies text/plain, `charset` supplies the charset, so
+    # the server-level security headers are inherited normally.
+    location ~* \.txt$ {
+        try_files $uri =404;
+    }
+
     location / {
         try_files
             $uri$final_suffix