Availability::- use_module(library(http/thread_httpd)).
 http_server(:Goal, :Options) is det
Create a server at Port that calls Goal for each parsed request. Options provide a list of options. Defined options are
port(?Address)
Port to bind to. Address is either a port or a term Host:Port. The port may be a variable, causing the system to select a free port. See tcp_bind/2.
entry_page(+URI)
Affects the message printed while the server is started. Interpreted as a URI relative to the server root.
tcp_socket(+Socket)
If provided, use this socket instead of the creating one and binding it to an address. The socket must be bound to an address.
workers(+Count)
Determine the number of worker threads. Default is 5. This is fine for small scale usage. Public servers typically need a higher number.
timeout(+Seconds)
Maximum time of inactivity trying to read the request after a connection has been opened. Default is 60 seconds. See set_stream/1 using the timeout option.
keep_alive_timeout(+Seconds)
Time to keep `Keep alive' connections alive. Default is 2 seconds.
stack_limit(+Bytes)
Stack limit to use for the workers. The default is inherited from the main thread. If you need to control resource usage you may consider the spawn option of http_handler/3 and library(thread_pool).
silent(Bool)
If true (default false), do not print an informational message that the server was started.

A typical initialization for an HTTP server that uses http_dispatch/1 to relay requests to predicates is:

:- use_module(library(http/thread_httpd)).
:- use_module(library(http/http_dispatch)).

start_server(Port) :-
    http_server(http_dispatch, [port(Port)]).

Note that multiple servers can coexist in the same Prolog process. A notable application of this is to have both an HTTP and HTTPS server, where the HTTP server redirects to the HTTPS server for handling sensitive requests.

 http_server(:Goal, :Options) is det
Create a server at Port that calls Goal for each parsed request. Options provide a list of options. Defined options are
port(?Address)
Port to bind to. Address is either a port or a term Host:Port. The port may be a variable, causing the system to select a free port. See tcp_bind/2.
entry_page(+URI)
Affects the message printed while the server is started. Interpreted as a URI relative to the server root.
tcp_socket(+Socket)
If provided, use this socket instead of the creating one and binding it to an address. The socket must be bound to an address.
workers(+Count)
Determine the number of worker threads. Default is 5. This is fine for small scale usage. Public servers typically need a higher number.
timeout(+Seconds)
Maximum time of inactivity trying to read the request after a connection has been opened. Default is 60 seconds. See set_stream/1 using the timeout option.
keep_alive_timeout(+Seconds)
Time to keep `Keep alive' connections alive. Default is 2 seconds.
stack_limit(+Bytes)
Stack limit to use for the workers. The default is inherited from the main thread. If you need to control resource usage you may consider the spawn option of http_handler/3 and library(thread_pool).
silent(Bool)
If true (default false), do not print an informational message that the server was started.

A typical initialization for an HTTP server that uses http_dispatch/1 to relay requests to predicates is:

:- use_module(library(http/thread_httpd)).
:- use_module(library(http/http_dispatch)).

start_server(Port) :-
    http_server(http_dispatch, [port(Port)]).

Note that multiple servers can coexist in the same Prolog process. A notable application of this is to have both an HTTP and HTTPS server, where the HTTP server redirects to the HTTPS server for handling sensitive requests.