Add a basic HTTP server

3 files changed, 75 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
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+/forge
diff --git a/Makefile b/Makefile
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+forge: main.ha
+	hare build -o $@ $^
diff --git a/main.ha b/main.ha
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+// SPDX-License-Identifier: AGPL-3.0-only
+// SPDX-FileCopyrightText: Copyright (c) 2025 Runxi Yu <https://runxiyu.org>
+// Adapted from template by Willow Barraco <contact@willowbarraco.fr>
+
+use getopt;
+use log;
+use net;
+use net::ip;
+use net::http;
+use net::dial;
+use os;
+use memio;
+use io;
+use fmt;
+use bufio;
+use strings;
+
+const usage: [_]getopt::help = [
+	"HTTP server",
+	('a', "address", "listened address (ex: 127.0.0.1:8080)")
+];
+
+export fn main() void = {
+	const cmd = getopt::parse(os::args, usage...);
+	defer getopt::finish(&cmd);
+
+	let port: u16 = 8080;
+	let ip_addr: ip::addr4 = [127, 0, 0, 1];
+
+	for (let i = 0z; i < len(cmd.opts); i += 1) {
+		const opt = cmd.opts[i];
+		switch (opt.0) {
+		case 'a' =>
+			match (dial::splitaddr(opt.1, "")) {
+			case let value: (str, u16) =>
+				ip_addr = ip::parsev4(value.0)!;
+				port = value.1;
+			case dial::invalid_address =>
+				abort("Invalid address");
+			};
+		case => abort(); // unreachable
+		};
+	};
+
+	const server = match (http::listen(ip_addr, port)) {
+	case let this: *http::server =>
+		yield this;
+	case net::error => abort("failure while listening");
+	};
+	defer http::server_finish(server);
+
+	for (true) {
+		const serv_req = match (http::serve(server)) {
+		case let this: *http::server_request =>
+			yield this;
+		case net::error => abort("failure while serving");
+		};
+		defer http::serve_finish(serv_req);
+
+		match (handlereq(serv_req.socket, &serv_req.request)) {
+		case void => yield;
+		case io::error => log::println("error while handling request");
+		};
+	};
+};
+
+export fn handlereq(conn: io::handle, request: *http::request) (void | io::error)  = {
+	fmt::fprint(conn, "HTTP/1.1 200 OK\r\n")?;
+	fmt::fprint(conn, "Content-Type: text/plain\r\n\r\n")?;
+
+	fmt::fprintln(conn, "Hi there!")?;
+};