val call :
?timeout:float ->
?param:string ->
?prefix:string ->
string ->
'b Lwt.tcall ~timeout ~param url do a jsonp call using url. It uses the named query parameter param (default "callback") to pass the name of the callback. It uses prefix to generate random string for callback name. If a timeout is given and there are no answer before timeout seconds, the lwt thread will be cancelled.
val call_custom_url :
?timeout:float ->
?prefix:string ->
(string -> string) ->
'b Lwt.tcall_custom_url ~timeout make_url. Same as call but let you build your own url given a callback name