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|
use fmt;
use log;
use net;
use net::tcp;
use net::ip;
use types;
use bufio;
use memio;
use shlex;
use io;
use unix::poll;
use unix::signal;
use encoding::utf8;
use strings;
use regex;
use fs;
use os;
use strings;
use path;
type nofreefd = !void;
type invalidquery = !str;
type quit = void;
type saveposerr = !(fs::error | io::error | path::error);
type error = !(invalidquery | shlex::syntaxerr | utf8::invalid | saveposerr);
const datafolder = "data";
fn savepos(filename: str, position: str) (void | saveposerr) = {
if (!os::exists(datafolder)) {
os::mkdir(datafolder, fs::mode::USER_RWX | fs::mode::GROUP_RX | fs::mode::OTHER_RX)?;
};
let pbuf = path::init(datafolder, filename)?;
const name = path::string(&pbuf);
let f = os::open(name, fs::flag::WRONLY | fs::flag::CREATE | fs::flag::TRUNC)?;
defer io::close(f)!;
os::chmod(name, fs::mode::USER_RW | fs::mode::GROUP_R | fs::mode::OTHER_R)?;
fmt::fprint(f, position)?;
};
fn handlequery(query: const []u8) (void | []u8 | str | quit | error) = {
log::printfln("query: {}", strings::fromutf8_unsafe(query));
let s = strings::fromutf8(query)?;
let spl = shlex::split(s)?;
defer strings::freeall(spl);
if (len(spl) == 0) {
return "Empty query": error;
};
switch (spl[0]) {
case "save" =>
if (len(spl) != 3) {
return "save takes 2 arguments (filename, position)": error;
};
savepos(spl[1], spl[2])?;
case "get" =>
if (len(spl) != 2) {
return "get takes 1 argument (filename)": error;
};
let pbuf = path::init(datafolder, spl[1])?;
let f = os::open(path::string(&pbuf))?;
let buf = io::drain(f)?;
log::printfln("sending buf: {}", strings::fromutf8_unsafe(buf));
return buf;
case "list" =>
let dirs = os::readdir(datafolder)?;
defer fs::dirents_free(dirs);
let buf = memio::dynamic();
defer io::close(&buf)!;
let sep = "";
for (let dir .. dirs) {
memio::concat(&buf, sep, dir.name)?;
sep = "\n";
};
return strings::dup(memio::string(&buf)?);
case "quit" =>
return quit;
case =>
return "Unknown query": error;
};
};
fn logerror(err: (void | error)) void = {
match (err) {
case void =>
return;
case let e: invalidquery =>
log::println(e);
case shlex::syntaxerr =>
log::println("Syntax error");
case utf8::invalid =>
log::println("Invalid utf8");
case let e: fs::error =>
log::println(fs::strerror(e));
case let e: io::error =>
log::println(io::strerror(e));
case let e: path::error =>
log::println(path::strerror(e));
};
};
fn close(pollfds: []poll::pollfd) void = {
for (let i = 2z; i < len(pollfds); i += 1) {
if (pollfds[i].fd >= 0) {
net::close(pollfds[i].fd)!;
};
};
//if (pollfds[0].fd >= 0) net::close(pollfds[0].fd)!;
};
fn nextfreefd(fds: []poll::pollfd) (size | nofreefd) = {
for (let i = 0z; i < len(fds); i += 1) {
if (fds[i].fd < 0) {
return i;
};
};
return nofreefd;
};
export fn main() void = {
let addr = ip::parse("0.0.0.0")!;
let sock = tcp::listen(addr, 6789u16)!;
defer net::close(sock)!;
signal::block(signal::sig::INT);
let sfd = signal::signalfd(signal::sig::INT)!;
// Use array, growable slice doesn't work with poll (new accept socket
// fds overwrite old accept socket fds for some reason)
let pollfds: [200]poll::pollfd = [
poll::pollfd {
fd = sock,
events = poll::event::POLLIN,
...
},
poll::pollfd {
fd = sfd,
events = poll::event::POLLIN,
...
}, poll::pollfd{fd = -1, ...}...
];
defer close(pollfds);
for (true) {
let i = poll::poll(pollfds, poll::INDEF)!;
if (i > 0) {
if (pollfds[0].revents & poll::event::POLLIN != 0) {
let s= tcp::accept(sock)!;
const fd = nextfreefd(pollfds)!;
pollfds[fd] = poll::pollfd {
fd = s,
events = poll::event::POLLIN,
...
};
};
if (pollfds[1].revents & poll::event::POLLIN != 0) {
signal::read(pollfds[1].fd)!;
for (let j = 2z; j < len(pollfds); j += 1) {
let s = pollfds[j].fd;
if (s != -1) {
log::printfln("Closing connection to client at index {} with fd {}", j, s: int);
net::close(s)!;
pollfds[j].fd = -1;
};
};
break;
};
for (let j = 2z; j < len(pollfds); j += 1) {
if (pollfds[j].revents & poll::event::POLLIN != 0) {
let s = pollfds[j].fd;
log::printfln("client at index {} with fd {}", j, s: int);
let line = match (bufio::read_line(s)) {
case let line: []u8 =>
yield line;
case io::EOF =>
log::printfln("Closing connection to client at index {} with fd {}", j, s: int);
net::close(s)!;
pollfds[j].fd = -1;
break;
case let e: io::error =>
log::println(io::strerror(e));
break;
};
defer free(line);
match (handlequery(line)) {
case let e: error =>
logerror(e);
case quit =>
log::printfln("Closing connection to client at index {} with fd {}", j, s: int);
net::close(s)!;
pollfds[j].fd = -1;
case void =>
yield;
case let buf: []u8 =>
defer free(buf);
match (fmt::fprintfln(s, "{}", strings::fromutf8_unsafe(buf))) {
case let e: io::error =>
log::println(io::strerror(e));
case size =>
yield;
};
case let buf: str =>
defer free(buf);
match (fmt::fprintfln(s, "{}", buf)) {
case let e: io::error =>
log::println(io::strerror(e));
case size =>
yield;
};
};
};
};
};
};
};
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