OCaml CURL GET, POST, PUT, DELETE examples

gistfile1.ml

(* ocamlfind ocamlopt -o exmpl -package curl -linkpkg exmpl.ml *)
open Printf

let _ = Curl.global_init Curl.CURLINIT_GLOBALALL

(*
 *************************************************************************
 ** Aux. functions
 *************************************************************************
 *)

let writer_callback a d =
	Buffer.add_string a d;
	String.length d

let init_conn url =
	let r = Buffer.create 16384
	and c = Curl.init () in
	Curl.set_timeout c 1200;
	Curl.set_sslverifypeer c false;
	Curl.set_sslverifyhost c Curl.SSLVERIFYHOST_EXISTENCE;
	Curl.set_writefunction c (writer_callback r);
	Curl.set_tcpnodelay c true;
	Curl.set_verbose c false;
	Curl.set_post c false;
	Curl.set_url c url; r,c


(*
 *************************************************************************
 ** GET, POST, PUT, DELETE
 *************************************************************************
 *)


(* GET *)
let get url =
	let r,c = init_conn url in
	Curl.set_followlocation c true;
	Curl.perform c;
	let rc = Curl.get_responsecode c in
	Curl.cleanup c;
	rc, (Buffer.contents r)


(* POST *)
let post ?(content_type = "text/html") url data =
	let r,c = init_conn url in
	Curl.set_post c true;
	Curl.set_httpheader c [ "Content-Type: " ^ content_type ];
	Curl.set_postfields c data;
	Curl.set_postfieldsize c (String.length data);
	Curl.perform c;
	let rc = Curl.get_responsecode c in
	Curl.cleanup c;
	rc, (Buffer.contents r)


(* PUT *)
let put ?(content_type = "text/html") url data =
	let pos = ref 0
	and len = String.length data in
	let rf cnt =
		let can_send = len - !pos in
		let to_send = if can_send > cnt then cnt else can_send in
		let r = String.sub data !pos to_send in
		pos := !pos + to_send; r
	and r,c = init_conn url in
	Curl.set_put c true;
	Curl.set_upload c true;
	Curl.set_readfunction c rf;
	Curl.set_httpheader c [ "Content-Type: " ^ content_type ];
	Curl.perform c;
	let rc = Curl.get_responsecode c in
	Curl.cleanup c;
	rc, (Buffer.contents r)


(* DELETE *)
let delete url =
	let r,c = init_conn url in
	Curl.set_customrequest c "DELETE";
	Curl.set_followlocation c false;
	Curl.perform c;
	let rc = Curl.get_responsecode c in
	Curl.cleanup c;
	rc, (Buffer.contents r)

(*
 *************************************************************************
 ** Check
 *************************************************************************
 *)


let _ =
	let r,c = put "http://localhost/test" "test" in
	printf "%d -> %s\n" r c

You can find a repository on Gitlab