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hare-playground/backend/cmd/httpd/main.ha

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Hare

use bufio;
use bytes;
use encoding::json;
use fmt;
use getopt;
use io;
use log;
use log::logfmt;
use memio;
use net;
use net::dial;
use net::http;
use net::ip;
use net::tcp::{reuseaddr};
use net::uri;
use os;
use path;
use strings;
use thread;
use time;
const usage: [_]getopt::help = [
"HTTP server",
('a', "address", "listened address (ex: 127.0.0.1:8080)")
];
export fn main() void = {
let l = logfmt::new(os::stdout);
log::setlogger(&l);
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, reuseaddr)) {
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");
};
log::println("method", serv_req.request.method, "uri", uri::string(serv_req.request.target));
let tid = thread::spawn(&handle_req, serv_req)!;
thread::detach(tid)!;
};
};
fn handle_req(arg: nullable *opaque) void = {
let serv_req = arg: *http::server_request;
defer http::serve_finish(serv_req);
let buf = memio::dynamic();
defer io::close(&buf)!;
let request = &serv_req.request;
switch (request.method) {
case "GET" =>
switch (request.target.path) {
case "/" => handle_index(&buf, serv_req);
case =>
handle_file(&buf, serv_req);
return;
};
case "POST" =>
switch (request.target.path) {
case "/v1/exec" => handle_exec(&buf, serv_req);
case =>
handle_notfound(&buf, serv_req);
return;
};
case "OPTIONS" =>
handle_cors(&buf, serv_req);
return;
case =>
handle_notfound(&buf, serv_req);
return;
};
};
fn handle_index(buf: *io::stream, serv_req: *http::server_request) void = {
let request = serv_req.request;
let fp = os::open("index.html")!;
defer io::close(fp)!;
let filecontent = io::drain(fp)!;
defer free(filecontent);
io::writeall(buf, filecontent)!;
http::response_write(
serv_req.socket,
http::STATUS_OK,
buf,
("Content-Type", "text/html; charset=utf-8")
)!;
};
fn handle_file(buf: *memio::stream, serv_req: *http::server_request) void = {
let request = &serv_req.request;
let pathbuf = strings::toutf8(request.target.path);
if (bytes::contains(pathbuf[1..], '/')) {
fmt::printfln("additional slash. not handling that.")!;
handle_notfound(buf, serv_req);
return;
};
let p = path::init(request.target.path)!;
let ext = path::peek_ext(&p);
if (ext is void) {
handle_notfound(buf, serv_req);
return;
};
let content_type = switch (ext: str) {
case "html" => yield "text/html; charset=utf-8";
case "css" => yield "text/css";
case "js" => yield "application/javascript; charset=utf-8";
case =>
handle_notfound(buf, serv_req);
return;
};
let filename = path::basename(request.target.path);
let fp = match (os::open(filename)) {
case let fp: io::file => yield fp;
case =>
handle_notfound(buf, serv_req);
return;
};
defer io::close(fp)!;
let filecontent = io::drain(fp)!;
defer free(filecontent);
io::writeall(buf, filecontent)!;
http::response_write(
serv_req.socket,
http::STATUS_OK,
buf,
("Content-Type", content_type)
)!;
};
export fn handle_notfound(buf: *io::stream, request: *http::server_request) void = {
fmt::fprintfln(buf, "not found")!;
http::response_write(
request.socket,
http::STATUS_NOT_FOUND,
buf,
("Content-Type", "text/plain")
)!;
};
export fn handle_cors(buf: *io::stream, serv_req: *http::server_request) void = {
let request = serv_req.request;
if (request.target.path == "/v1/exec") {
http::response_write(
serv_req.socket,
http::STATUS_OK,
void,
("Content-Length", "0"),
("access-control-allow-origin", "*"),
("access-control-allow-methods", "options, post"),
("access-control-allow-headers", "authorization, content-type")
)!;
return;
};
http::response_write(
serv_req.socket,
http::STATUS_METHOD_NOT_ALLOWED,
void,
("Content-Length", "0")
)!;
};
export fn handle_exec(buf: *io::stream, serv_req: *http::server_request) void = {
let request = serv_req.request;
let payload = match (request.body) {
case void =>
http::response_write(
serv_req.socket,
http::STATUS_BAD_REQUEST,
void,
("Content-Length", "0")
)!;
return;
case let body: io::handle =>
let payload = json::load(body)!;
// defer json::finish(payload);
yield payload;
};
defer json::finish(payload);
let payload = match (payload) {
case let obj: json::object => yield obj;
case =>
handle_notfound(buf, serv_req);
return;
};
let files = match (json::get(&payload, "files")) {
case void =>
handle_notfound(buf, serv_req);
return;
case let j: *json::value => yield j;
};
let files = match (*files) {
case let o: json::object => yield o;
case =>
handle_notfound(buf, serv_req);
return;
};
let code = match (json::get(&files, "")) {
case void =>
handle_notfound(buf, serv_req);
return;
case let j: *json::value => yield j;
};
let code = match (*code) {
case let c: str => yield c;
case =>
handle_notfound(buf, serv_req);
return;
};
let (stdout, stderr) = run_code(code);
defer free(stderr);
defer free(stdout);
let obj = json::newobject();
defer json::finish(obj);
json::set(&obj, "stdout", stdout);
json::set(&obj, "stderr", stderr);
json::set(&obj, "id", "123");
json::set(&obj, "ok", true);
json::set(&obj, "duration", 0.0);
json::dump(buf, obj)!;
http::response_write(
serv_req.socket,
http::STATUS_OK,
buf,
("Content-Type", "application/json"),
("access-control-allow-origin", "*"),
("access-control-allow-methods", "options, post"),
("access-control-allow-headers", "authorization, content-type")
)!;
};