A very basic http client in Odin using only the core library

main.odin

package main

import "core:fmt"
import "core:log"
import "core:mem"
import "core:net"
import "core:os"

main :: proc() {
	args := os.args
	if len(args) != 2 {
		fmt.println("Usage: ", args[0], "<address>")
		os.exit(1)
	}

	address := args[1]
	socket, err_dial := net.dial_tcp_from_hostname_and_port_string(address)
	if err_dial != nil {
		fmt.eprintln("error: could not dial", address, "with error", err_dial)
		os.exit(1)
	}
	defer net.close(socket)

	bytes_request := "GET / HTTP/1.1\r\n\r\n"
	bytes_sent, err_write := net.send_tcp(socket, transmute([]u8)bytes_request)
	if err_write != nil {
		fmt.eprintln("error: failed during send to", address, "with error", err_write)
		os.exit(1)
	}
	log.debugf("sent %d bytes\n", bytes_sent)

	bytes_buff: [32 * mem.Kilobyte]byte
	bytes_recv, err_recv := net.recv_tcp(socket, bytes_buff[:])
	if err_recv != nil {
		fmt.eprintln("error: failed during recv from", address, "with error", err_recv)
		os.exit(1)
	}

	msg := bytes_buff[:bytes_recv]
	fmt.println(cast(string)msg)
}