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Eliom_common - Low level functions for Eliom, exceptions and types.
Module Eliom_common : sig end Low level functions for Eliom, exceptions and types. type scope_hierarchy = Eliom_common_base.scope_hierarchy Scopes type cookie_scope = [ `Client_process of scope_hierarchy | `Session of scope_hierarchy ] type user_scope = [ `Client_process of scope_hierarchy | `Session of scope_hierarchy | `Session_group of scope_hierarchy ] type scope = [ `Client_process of scope_hierarchy | `Session of scope_hierarchy | `Session_group of scope_hierarchy | `Site ] type all_scope = [ `Client_process of scope_hierarchy | `Global | `Request | `Session of scope_hierarchy | `Session_group of scope_hierarchy | `Site ] type cookie_level = [ `Client_process | `Session ] type user_level = [ `Client_process | `Session | `Session_group ] val cookie_scope_of_user_scope : [< user_scope ] -> [> cookie_scope ] val cookie_level_of_user_scope : [< user_scope ] -> [> cookie_level ] val level_of_user_scope : [< user_scope ] -> [> user_level ] type global_scope = [ `Global ] Eliom is using regular (browser) cookies but can also use its own browser tab cookies (only if you are using a client side Eliom application). It is possible to define Eliom references or services for one (browser) session, for one tab, or for one group of sessions. Using `Global scope means you want the data or service to be available to any client. `Site is limited to current sub-site (if you have several sites on the same server). If you want to restrict the visibility of an Eliom reference or a service: * to a browser session, use ~scope:Eliom_common.default_session_scope , * to a group of sessions, use ~scope:Eliom_common.default_group_scope , * to a client process, use ~scope:Eliom_common.default_process_scope . If you have a client side Eliom program running, and you want to restrict the visibility of the service to this instance of the program, use ~scope:Eliom_common.default_process_scope . You can create new scope hierachies with Eliom_common.create_scope_hierarchy . Thus it is possible to have for example several sessions that can be opened or closed independently. They use different cookies. Secure scopes are associated to secure cookies (that is, cookies sent by browsers only if the protocol is https). type site_scope = [ `Site ] type session_group_scope = [ `Session_group of scope_hierarchy ] type session_scope = [ `Session of scope_hierarchy ] type client_process_scope = [ `Client_process of scope_hierarchy ] type request_scope = [ `Request ] val global_scope : global_scope val site_scope : site_scope val default_group_scope : session_group_scope val default_session_scope : session_scope val default_process_scope : client_process_scope val comet_client_process_scope : client_process_scope val request_scope : request_scope val create_scope_hierarchy : string -> scope_hierarchy val list_scope_hierarchies : unit -> scope_hierarchy list === Exception and error handling === exception Eliom_404 Page not found exception Eliom_Wrong_parameter Service called with wrong parameter names exception Eliom_Session_expired exception Eliom_Typing_Error of (string * exn) list The service (GET or POST) parameters do not match expected type exception Eliom_site_information_not_available of string That function cannot be used when the site information is not available, that is, outside a request or the initialisation phase of your Eliom module (while reading the configuration file). In particular, you cannot use the function before the configuration file is read for example when you are using static linking. In that case you must delay the function call using Eliom_service.register_eliom_module . type full_state_name = user_scope * bool * string module Full_state_name_table : sig end val eliom_link_too_old : bool Polytables.key If present and true in request data, it means that the previous coservice does not exist any more val eliom_service_session_expired : (full_state_name list * full_state_name list) Polytables.key If present in request data, means that the service session cookies does not exist any more. The string lists are the list of names of expired sessions