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125 lines
2.9 KiB
V
125 lines
2.9 KiB
V
// Copyright (c) 2019-2022 Alexander Medvednikov. All rights reserved.
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// Use of this source code is governed by an MIT license
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// that can be found in the LICENSE file.
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module http
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import io
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import net
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import time
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// ServerStatus is the current status of the server.
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// .running means that the server is active and serving.
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// .stopped means that the server is not active but still listening.
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// .closed means that the server is completely inactive.
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pub enum ServerStatus {
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running
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stopped
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closed
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}
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interface Handler {
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mut:
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handle(Request) Response
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}
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pub struct Server {
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mut:
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state ServerStatus = .closed
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listener net.TcpListener
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pub mut:
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port int = 8080
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handler Handler = DebugHandler{}
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read_timeout time.Duration = 30 * time.second
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write_timeout time.Duration = 30 * time.second
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accept_timeout time.Duration = 30 * time.second
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}
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pub fn (mut s Server) listen_and_serve() ? {
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if s.handler is DebugHandler {
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eprintln('Server handler not set, using debug handler')
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}
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s.listener = net.listen_tcp(.ip6, ':$s.port') ?
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s.listener.set_accept_timeout(s.accept_timeout)
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eprintln('Listening on :$s.port')
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s.state = .running
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for {
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// break if we have a stop signal
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if s.state != .running {
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break
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}
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mut conn := s.listener.accept() or {
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if err.msg != 'net: op timed out' {
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eprintln('accept() failed: $err; skipping')
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}
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continue
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}
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conn.set_read_timeout(s.read_timeout)
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conn.set_write_timeout(s.write_timeout)
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// TODO: make concurrent
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s.parse_and_respond(mut conn)
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}
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if s.state == .stopped {
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s.close()
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}
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}
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// stop signals the server that it should not respond anymore
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[inline]
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pub fn (mut s Server) stop() {
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s.state = .stopped
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}
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// close immediatly closes the port and signals the server that it has been closed
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[inline]
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pub fn (mut s Server) close() {
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s.state = .closed
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s.listener.close() or { return }
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}
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[inline]
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pub fn (s &Server) status() ServerStatus {
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return s.state
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}
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fn (mut s Server) parse_and_respond(mut conn net.TcpConn) {
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defer {
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conn.close() or { eprintln('close() failed: $err') }
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}
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mut reader := io.new_buffered_reader(reader: conn)
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defer {
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reader.free()
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}
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req := parse_request(mut reader) or {
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$if debug {
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// only show in debug mode to prevent abuse
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eprintln('error parsing request: $err')
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}
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return
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}
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mut resp := s.handler.handle(req)
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if resp.version() == .unknown {
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resp.set_version(req.version)
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}
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conn.write(resp.bytes()) or { eprintln('error sending response: $err') }
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}
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// DebugHandler implements the Handler interface by echoing the request
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// in the response
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struct DebugHandler {}
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fn (d DebugHandler) handle(req Request) Response {
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$if debug {
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eprintln('[$time.now()] $req.method $req.url\n\r$req.header\n\r$req.data - 200 OK')
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} $else {
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eprintln('[$time.now()] $req.method $req.url - 200')
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}
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mut r := Response{
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text: req.data
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header: req.header
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}
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r.set_status(.ok)
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r.set_version(req.version)
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return r
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}
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