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Router Extension

This extension adds content routing features to Rose.

After installation ensure Router is the primary service in your system by editing the Gateway section of your system.conf file and set service=router. Additionally unless you want to use index.php/my-route/ we recommend you enable URL rewriting to make pretty URLs. If using Apache or compatible an .htaccess like the following will do:

Default Operation

Router will use the relative path provided by Gateway (i.e. when using something like index.php/home the relative path is /home) and return the appropriate content using the following rules (in order of precedence, whichever is satisfied first):

• User is authenticated¹ and there is a rcore/content/home/private.html file, it will be loaded, evaluated with Expr and sent to the client.

• User is not authenticated and there is a rcore/content/home/public.html file, it will be loaded, evaluated with Expr and sent to the client.

• When a rcore/content/home/index.html file exists, it will be loaded, evaluated with Expr and sent to the client.

• User is not authenticated and there is only a rcore/content/home/private.html then Router will redirect to /login.

• Router will redirect to /404.

¹The condition "authenticated user" is determined by checking if the user field of the current session (if any) is set to a non-null value (as set by Sentinel).

Routing to Services or URLs

When a certain route (i.e. /api) should pass control to another Rose service (i.e. wind) or redirect to a URL you can use the Router section of the system.conf file to achieve this, by providing "route=service_name" pairs (where route is a delimiter-less regex), such as:

Service Redirection

• Using the service: prefix in the value will cause an internal redirection to the specified service.

  • i.e. /api = service:wind will redirect to service wind.

• Any path provided in the value will be set as the new relative path.

  • i.e. /api = service:wind/details will redirect to service wind setting relative path to /details.

• Any path provided by the client after the route base will be appended to the relative path.

  • i.e. /api = service:wind/details but loaded from client as /api/users will cause redirection to service wind with relative path /details/users.
• Any query parameters in the value will be merged into the current request parameters.
  • i.e. /api = service:wind/details?b=B and loaded from client as /api/users?a=A will cause redirection to service wind with relative path /details/users and request parameters a=A&b=B.

Location Redirection

• Using the location: prefix in the value will cause the location header to be set in the response HTTP headers and an immediate execution termination.

  • i.e. /contact = location:https://example.com/ will redirect to URL https://example.com/.

• Any path provided by the client after the route base will be ignored.

  • i.e. /contact = location:https://example.com/ and loaded from client as /contact/sub-path/ will redirect to https://example.com/.

• Any query parameters specified by the client will be ignored.

  • i.e. /contact = location:https://example.com/?a=A and loaded from client as /contact/sub-path/?b=B will redirect to https://example.com/?a=A.

Notes

The value of routes is evaluated using Expr, therefore any formating can be made if needed, and variables from the gateway's request parameter map can be accessed as usual via (gateway.request.<name>).