Allow swagger-servant-ui with redoc to be nested in an API

KtorZ · KtorZ · commit 22f904e785a4 · 2018-08-09T14:26:46.000+02:00
In the current state, if we were to declare a servant-swagger-ui server behind some path, for instance:

    type API =
        "docs" :&gt; ServantSwaggerUI "swagger-ui" "swagger.json"

One would correctly have access to the template in `&lt;host&gt;/docs/swagger.ui`
but the template would refer to a swagger.json at `/swagger.json`
whereas it is hosted under `/docs/swagger.json`. To cope with this, we
can use relative paths in the template, making sure that the current url
is always ending with a slash.
diff --git a/servant-swagger-ui-redoc/redoc.index.html.tmpl b/servant-swagger-ui-redoc/redoc.index.html.tmpl
@@ -7,9 +7,17 @@
     <style>
       body { margin: 0; padding: 0; }
     </style>
+    <script>
+        // Force Strict-URL Routing for assets relative paths
+        (function onload() {
+            if (!window.location.href.endsWith("/")) {
+                window.location.href += "/";
+            }
+        }());
+    </script>
   </head>
   <body>
-    <redoc spec-url='/SERVANT_SWAGGER_UI_SCHEMA'></redoc>
+    <redoc spec-url='../SERVANT_SWAGGER_UI_SCHEMA'></redoc>
     <script src="redoc.min.js"> </script>
   </body>
 </html>
