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| 1 | +// Copyright (c) 2019-2024 Alexander Medvednikov. All rights reserved. |
| 2 | +// Use of this source code is governed by an MIT license |
| 3 | +// that can be found in the LICENSE file. |
| 4 | +module http |
| 5 | + |
| 6 | +import io |
| 7 | +import time |
| 8 | +import net.mbedtls |
| 9 | + |
| 10 | +// This file implements TLS termination for net.http.Server on top of the |
| 11 | +// mbedtls SSL listener. It is gated to the default TLS backend; the matching |
| 12 | +// `server_tls_d_use_openssl.v` provides a clear-error stub when the project is |
| 13 | +// built with `-d use_openssl`. |
| 14 | + |
| 15 | +// listen_and_serve_tls is the TLS counterpart of listen_and_serve. It is |
| 16 | +// dispatched to by listen_and_serve when `s.cert` and `s.cert_key` are set. |
| 17 | +fn (mut s Server) listen_and_serve_tls() { |
| 18 | + // Pick a default port that's distinct from the plain-HTTP default if the |
| 19 | + // user hasn't overridden it. |
| 20 | + addr := if s.addr == '' || s.addr == ':${default_server_port}' { |
| 21 | + ':${default_https_server_port}' |
| 22 | + } else { |
| 23 | + s.addr |
| 24 | + } |
| 25 | + |
| 26 | + mut listener := mbedtls.new_ssl_listener(addr, mbedtls.SSLConnectConfig{ |
| 27 | + cert: s.cert |
| 28 | + cert_key: s.cert_key |
| 29 | + in_memory_verification: s.in_memory_verification |
| 30 | + validate: false // accept any client; servers don't verify clients by default |
| 31 | + }) or { |
| 32 | + eprintln('Listening TLS on ${addr} failed, err: ${err}') |
| 33 | + return |
| 34 | + } |
| 35 | + defer { |
| 36 | + listener.shutdown() or {} |
| 37 | + } |
| 38 | + s.addr = addr |
| 39 | + |
| 40 | + ch := chan &mbedtls.SSLConn{cap: s.pool_channel_slots} |
| 41 | + mut ws := []thread{cap: s.worker_num} |
| 42 | + for wid in 0 .. s.worker_num { |
| 43 | + ws << new_tls_handler_worker(wid, ch, s.handler, s.max_keep_alive_requests) |
| 44 | + } |
| 45 | + |
| 46 | + if s.show_startup_message { |
| 47 | + println('Listening on https://${s.addr}/') |
| 48 | + flush_stdout() |
| 49 | + } |
| 50 | + |
| 51 | + time.sleep(20 * time.millisecond) |
| 52 | + s.state = .running |
| 53 | + if s.on_running != unsafe { nil } { |
| 54 | + s.on_running(mut s) |
| 55 | + } |
| 56 | + for s.state == .running { |
| 57 | + mut conn := listener.accept() or { |
| 58 | + if s.state != .running { |
| 59 | + break |
| 60 | + } |
| 61 | + $if debug { |
| 62 | + eprintln('TLS accept failed: ${err}; skipping') |
| 63 | + } |
| 64 | + continue |
| 65 | + } |
| 66 | + if s.read_timeout > 0 { |
| 67 | + conn.set_read_timeout(s.read_timeout) |
| 68 | + } |
| 69 | + ch <- conn |
| 70 | + } |
| 71 | + if s.state == .stopped { |
| 72 | + s.close() |
| 73 | + } |
| 74 | +} |
| 75 | + |
| 76 | +// TlsHandlerWorker serves HTTP/1.1 requests on TLS-wrapped connections. |
| 77 | +struct TlsHandlerWorker { |
| 78 | + id int |
| 79 | + ch chan &mbedtls.SSLConn |
| 80 | + max_keep_alive_requests int |
| 81 | +pub mut: |
| 82 | + handler Handler |
| 83 | +} |
| 84 | + |
| 85 | +fn new_tls_handler_worker(wid int, ch chan &mbedtls.SSLConn, handler Handler, max_keep_alive_requests int) thread { |
| 86 | + mut w := &TlsHandlerWorker{ |
| 87 | + id: wid |
| 88 | + ch: ch |
| 89 | + handler: handler |
| 90 | + max_keep_alive_requests: max_keep_alive_requests |
| 91 | + } |
| 92 | + return spawn w.process_requests() |
| 93 | +} |
| 94 | + |
| 95 | +fn (mut w TlsHandlerWorker) process_requests() { |
| 96 | + for { |
| 97 | + mut conn := <-w.ch or { break } |
| 98 | + w.handle_conn(mut conn) |
| 99 | + } |
| 100 | +} |
| 101 | + |
| 102 | +fn (mut w TlsHandlerWorker) handle_conn(mut conn mbedtls.SSLConn) { |
| 103 | + defer { |
| 104 | + conn.shutdown() or {} |
| 105 | + } |
| 106 | + mut reader := io.new_buffered_reader(reader: conn) |
| 107 | + defer { |
| 108 | + unsafe { |
| 109 | + reader.free() |
| 110 | + } |
| 111 | + } |
| 112 | + |
| 113 | + mut request_count := 0 |
| 114 | + for { |
| 115 | + mut req := parse_request(mut reader) or { |
| 116 | + if err !is io.Eof { |
| 117 | + $if debug { |
| 118 | + eprintln('error parsing TLS request: ${err}') |
| 119 | + } |
| 120 | + } |
| 121 | + return |
| 122 | + } |
| 123 | + request_count++ |
| 124 | + // `conn.ip` is the peer's IPv4 address as populated by mbedtls' |
| 125 | + // accept(); blank for IPv6, which is acceptable for keep-alive logic. |
| 126 | + if conn.ip != '' { |
| 127 | + req.header.add_custom('Remote-Addr', conn.ip) or {} |
| 128 | + } |
| 129 | + |
| 130 | + mut resp := w.handler.handle(req) |
| 131 | + normalize_server_response(mut resp, req) |
| 132 | + |
| 133 | + if !resp.header.contains(.content_length) { |
| 134 | + resp.header.set(.content_length, '${resp.body.len}') |
| 135 | + } |
| 136 | + |
| 137 | + max_reached := w.max_keep_alive_requests > 0 && request_count >= w.max_keep_alive_requests |
| 138 | + req_conn := (req.header.get(.connection) or { '' }).to_lower() |
| 139 | + resp_conn := (resp.header.get(.connection) or { '' }).to_lower() |
| 140 | + keep_alive := if max_reached { |
| 141 | + false |
| 142 | + } else if resp_conn == 'close' { |
| 143 | + false |
| 144 | + } else if resp_conn == 'keep-alive' { |
| 145 | + true |
| 146 | + } else if req_conn == 'close' { |
| 147 | + false |
| 148 | + } else if req_conn == 'keep-alive' { |
| 149 | + true |
| 150 | + } else { |
| 151 | + req.version == .v1_1 |
| 152 | + } |
| 153 | + if max_reached || !resp.header.contains(.connection) { |
| 154 | + if keep_alive { |
| 155 | + resp.header.set(.connection, 'keep-alive') |
| 156 | + } else { |
| 157 | + resp.header.set(.connection, 'close') |
| 158 | + } |
| 159 | + } |
| 160 | + |
| 161 | + conn.write(resp.bytes()) or { |
| 162 | + $if debug { |
| 163 | + eprintln('error sending TLS response: ${err}') |
| 164 | + } |
| 165 | + return |
| 166 | + } |
| 167 | + |
| 168 | + if !keep_alive { |
| 169 | + return |
| 170 | + } |
| 171 | + } |
| 172 | +} |
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