Fixed issue related to reverse proxy.

1) Fix reverse proxy redirection in server mode.
2) All reverse proxies in desktop mode.

web/pgAdmin4.py

@@ -97,9 +97,6 @@ app.config['sessions'] = dict()
 if setup_db_required:
     setup.setup_db(app)
 
-if config.SERVER_MODE:
-    app.wsgi_app = ReverseProxied(app.wsgi_app)
-
 # Authentication sources
 if len(config.AUTHENTICATION_SOURCES) > 0:
     # Creating a temporary auth source list removing INTERNAL
@@ -142,6 +139,9 @@ if 'PGADMIN_INT_KEY' in os.environ:
 else:
     app.PGADMIN_INT_KEY = ''
 
+if not app.PGADMIN_RUNTIME:
+    app.wsgi_app = ReverseProxied(app.wsgi_app)
+
 
 ##########################################################################
 # The entry point

web/pgadmin/__init__.py

@@ -123,13 +123,17 @@ class PgAdmin(Flask):
         # like 'localhost/pgadmin4' then we have to append '/pgadmin4'
         # into endpoints
         #############################################################
-        wsgi_root_path = current_app.config.get("APPLICATION_ROOT", "/")
+        wsgi_root_path = None
+        if url_for('browser.index') != '/browser/':
+            wsgi_root_path = url_for('browser.index').replace(
+                '/browser/', ''
+            )
 
         def get_full_url_path(url):
             """
             Generate endpoint URL at per WSGI alias
             """
-            if wsgi_root_path != "/" and url:
+            if wsgi_root_path is not None and url:
                 return wsgi_root_path + url
             else:
                 return url

web/pgadmin/utils/__init__.py

@@ -846,4 +846,4 @@ def get_safe_post_login_redirect():
         if url.startswith(item):
             return url
 
-    return os.environ.get("SCRIPT_NAME", "/")
+    return url_for('browser.index')