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v/vlib/picoev/picoev.v

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// Copyright (c) 2019-2021 Alexander Medvednikov. All rights reserved.
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// Use of this source code is governed by an MIT license
// that can be found in the LICENSE file.
module picoev
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import net
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import picohttpparser
#include <errno.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <fcntl.h>
#include <signal.h>
#flag -I @VEXEROOT/thirdparty/picoev
#flag -L @VEXEROOT/thirdparty/picoev
#flag @VEXEROOT/thirdparty/picoev/picoev.o
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#include "src/picoev.h"
const (
max_fds = 1024
max_timeout = 10
max_read = 4096
max_write = 8192
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)
struct C.in_addr {
mut:
s_addr int
}
struct C.sockaddr_in {
mut:
sin_family int
sin_port int
sin_addr C.in_addr
}
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struct C.sockaddr_storage {}
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fn C.atoi() int
fn C.strncasecmp(s1 charptr, s2 charptr, n size_t) int
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struct C.picoev_loop {}
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struct Picoev {
loop &C.picoev_loop
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cb fn(data voidptr, req picohttpparser.Request, mut res picohttpparser.Response)
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mut:
date byteptr
buf byteptr
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idx [max_fds]int
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out byteptr
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pub mut:
user_data voidptr = voidptr(0)
timeout_secs int = 8
max_headers int = 100
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}
fn C.picoev_del(&C.picoev_loop, int) int
fn C.picoev_set_timeout(&C.picoev_loop, int, int)
// fn C.picoev_handler(loop &C.picoev_loop, fd int, revents int, cb_arg voidptr)
// TODO: (sponge) update to C.picoev_handler with C type def update
type Cpicoev_handler = fn(loop &C.picoev_loop, fd int, revents int, cb_arg voidptr)
fn C.picoev_add(&C.picoev_loop, int, int, int, &Cpicoev_handler, voidptr) int
fn C.picoev_init(int) int
fn C.picoev_create_loop(int) &C.picoev_loop
fn C.picoev_loop_once(&C.picoev_loop, int) int
fn C.picoev_destroy_loop(&C.picoev_loop) int
fn C.picoev_deinit() int
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[inline]
fn setup_sock(fd int) {
on := 1
if C.setsockopt(fd, C.IPPROTO_TCP, C.TCP_NODELAY, &on, sizeof(int)) < 0 {
println('setup_sock.setup_sock failed')
}
if C.fcntl(fd, C.F_SETFL, C.O_NONBLOCK) != 0 {
println('fcntl failed')
}
}
[inline]
fn close_conn(loop &C.picoev_loop, fd int) {
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C.picoev_del(loop, fd)
C.close(fd)
}
[inline]
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fn req_read(fd int, b byteptr, max_len int, idx int) int {
unsafe {
return C.read(fd, b + idx, max_len - idx)
}
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}
fn rw_callback(loop &C.picoev_loop, fd int, events int, cb_arg voidptr) {
mut p := unsafe {&Picoev(cb_arg)}
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if (events & C.PICOEV_TIMEOUT) != 0 {
close_conn(loop, fd)
p.idx[fd] = 0
return
} else if (events & C.PICOEV_READ) != 0 {
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C.picoev_set_timeout(loop, fd, p.timeout_secs)
// Request init
mut buf := p.buf
unsafe {
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buf += fd * max_read /* pointer magic */
}
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mut req := picohttpparser.Request{}
for { /* Request parsing loop */
r := req_read(fd, buf, max_read, p.idx[fd]) // Get data from socket
if r == 0 { /* connection closed by peer */
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close_conn(loop, fd)
p.idx[fd] = 0
return
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} else if r == -1 { /* error */
if C.errno == C.EAGAIN || C.errno == C.EWOULDBLOCK { /* try again later */
return
} else { /* fatal error */
close_conn(loop, fd)
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p.idx[fd] = 0
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return
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}
}
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p.idx[fd] += r
mut s := unsafe { tos(buf, p.idx[fd]) }
pret := req.parse_request(s, p.max_headers) // Parse request via picohttpparser
if pret > 0 { // Success
break
} else if pret == -1 { // Parse error
eprintln("picohttprequest: ParseError")
return
}
assert pret == -2 /* request is incomplete, continue the loop */
if p.idx[fd] == sizeof(buf) {
eprintln("picohttprequest: RequestIsTooLongError")
return
}
}
// Response init
mut out := p.out
unsafe {
out += fd * max_write /* pointer magic */
}
mut res := picohttpparser.Response{
fd: fd
date: p.date
buf_start: out
buf: out
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}
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// Callback (should call .end() itself)
p.cb(mut p.user_data, req, mut &res)
p.idx[fd] = 0
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}
}
fn accept_callback(loop &C.picoev_loop, fd int, events int, cb_arg voidptr) {
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mut p := unsafe {&Picoev(cb_arg)}
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newfd := C.accept(fd, 0, 0)
if newfd != -1 {
setup_sock(newfd)
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C.picoev_add(loop, newfd, C.PICOEV_READ, p.timeout_secs, rw_callback, cb_arg)
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}
}
pub fn new(port int, cb voidptr) &Picoev {
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fd := C.socket(net.SocketFamily.inet, net.SocketType.tcp, 0)
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assert fd != -1
flag := 1
assert C.setsockopt(fd, C.SOL_SOCKET, C.SO_REUSEADDR, &flag, sizeof(int)) == 0
assert C.setsockopt(fd, C.SOL_SOCKET, C.SO_REUSEPORT, &flag, sizeof(int)) == 0
$if linux {
assert C.setsockopt(fd, C.IPPROTO_TCP, C.TCP_QUICKACK, &flag, sizeof(int)) == 0
timeout := 10
assert C.setsockopt(fd, C.IPPROTO_TCP, C.TCP_DEFER_ACCEPT, &timeout, sizeof(int)) == 0
queue_len := 4096
assert C.setsockopt(fd, C.IPPROTO_TCP, C.TCP_FASTOPEN, &queue_len, sizeof(int)) == 0
}
mut addr := C.sockaddr_in{}
addr.sin_family = C.AF_INET
addr.sin_port = C.htons(port)
addr.sin_addr.s_addr = C.htonl(C.INADDR_ANY)
size := 16 // sizeof(C.sockaddr_in)
bind_res := C.bind(fd, &addr, size)
assert bind_res == 0
listen_res := C.listen(fd, C.SOMAXCONN)
assert listen_res == 0
setup_sock(fd)
C.picoev_init(max_fds)
loop := C.picoev_create_loop(max_timeout)
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mut pv := &Picoev{
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loop: loop
cb: cb
date: C.get_date()
buf: unsafe { malloc(max_fds * max_read + 1) }
out: unsafe { malloc(max_fds * max_write + 1) }
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}
C.picoev_add(loop, fd, C.PICOEV_READ, 0, accept_callback, pv)
go update_date(mut pv)
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return pv
}
pub fn (p Picoev) serve() {
for {
C.picoev_loop_once(p.loop, 1)
}
}
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fn update_date(mut p Picoev) {
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for {
p.date = C.get_date()
C.usleep(1000000)
}
}