SWI-Prolog の http クライアントの使い方 (Get)

http_get.pl

/* ------------------------------------------------------------------- */
/*
	http_get.pl

						Feb/28/2020
*/
/* ------------------------------------------------------------------- */
:- use_module(library(http/http_open)).

:- initialization main.
main() :-
	format('*** 開始 ***\n'),
	Url_in = 'https://httpbin.org/get',
	http_open(Url_in, In, []),
	copy_stream_data(In,user_output),
	close(In),
	format('*** 終了 ***\n'),
	halt.
/* ------------------------------------------------------------------- */

実行結果

$ swipl -f ./http_get.pl
*** 開始 ***
{
  "args": {}, 
  "headers": {
    "Host": "httpbin.org", 
    "User-Agent": "SWI-Prolog", 
    "X-Amzn-Trace-Id": "Root=1-5e58b488-4687f8c67b3200f25fe2155c"
  }, 
  "origin": "153.233.38.78", 
  "url": "https://httpbin.org/get"
}
*** 終了 ***

確認したバージョン

$ swipl --version
SWI-Prolog version 9.0.4 for x86_64-linux