Shorter permalinks for Tahoe-LAFS/TiddlyWiki sites like https://dubiousdod.org

tahoe-permalink.nginx

server {
  # ...
  location ^~ /go/ {
    limit_except HEAD GET { deny all; }
    # /go/SomeHash redirects to front page with #SomeHash as hash (for browser that don't preserve hashes in redirects)
    rewrite ^/go/(.*)$ /uri/URI:DIR2-RO:LONG_TWIDDLYWIKI_FOLDER_READ_CAPABILITY_URL/index.html#$1 redirect;
  }

  location ^~ / {
    limit_except HEAD GET { deny all; }
    # Redirect / to the site's front page capability (as long as the method is HEAD or GET):
    rewrite ^/?$ /uri/URI:DIR2-RO:LONG_TWIDDLYWIKI_FOLDER_READ_CAPABILITY_URL/index.html redirect;
    # fallback to static
    root /PATH_TO/allmydata/web/static;
  }
  location /
  {
    # Deny all other locations. Actually, nothing should get here, but it's a tradition :)
    return 403;
  }
}

tahoe-tiddly-permalinks.diff

--- orig/wiki.html	2011-11-16 12:42:06.000000000 +0700
+++ new/wiki.html	2012-11-08 13:18:42.831290734 +0700
@@ -3738,6 +3252,7 @@
 	var t = encodeURIComponent(String.encodeTiddlyLink(title));
 	if(window.location.hash != t)
 		window.location.hash = t;
+        prompt("Permalink for this tiddler",window.location.protocol+'//'+window.location.host+'/go/'+t);
 	return false;
 };
 
@@ -5348,6 +4863,7 @@
 		links.push(String.encodeTiddlyLink(title));
 	});
 	var t = encodeURIComponent(links.join(" "));
+        prompt("Permalink for currently visible tiddlers",window.location.protocol+'//'+window.location.host+'/go/'+t);
 	if(t == "")
 		t = "#";
 	if(window.location.hash != t)

Fo details, see https://dubiousdod.org/blog/shorter-urls.html