Initial commit: enterprise digital platform with portal SSO, DigiServer, IT Assets, NetworkView, Server Monitor

digiserver-v2/app/utils/script_name_fix.py

@@ -0,0 +1,26 @@
+"""
+ScriptNameFix WSGI middleware.
+
+When nginx strips the path prefix before forwarding to a Flask app it also
+sets the X-Script-Name header (e.g. /digiserver).  This middleware reads
+that header and sets SCRIPT_NAME in the WSGI environ so that Flask's
+url_for() generates absolute URLs with the correct prefix.
+
+Usage in the app factory:
+    from app.utils.script_name_fix import ScriptNameFix
+    app.wsgi_app = ScriptNameFix(app.wsgi_app)
+"""
+
+
+class ScriptNameFix:
+    def __init__(self, app):
+        self.app = app
+
+    def __call__(self, environ, start_response):
+        script_name = environ.get('HTTP_X_SCRIPT_NAME', '').rstrip('/')
+        if script_name:
+            environ['SCRIPT_NAME'] = script_name
+            path_info = environ.get('PATH_INFO', '/')
+            if path_info.startswith(script_name):
+                environ['PATH_INFO'] = path_info[len(script_name):] or '/'
+        return self.app(environ, start_response)