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package server;
import sys.FileSystem;
import js.node.Buffer;
import haxe.io.Path;
import js.node.Fs;
import js.node.Https;
import js.node.Http;
import js.node.url.URL;
import js.node.http.IncomingMessage;
import js.node.http.ServerResponse;
import js.node.Path as JsPath;
using StringTools;
class HttpServer {
static final mimeTypes = [
"html" => "text/html",
"js" => "text/javascript",
"css" => "text/css",
"json" => "application/json",
"png" => "image/png",
"jpg" => "image/jpg",
"gif" => "image/gif",
"svg" => "image/svg+xml",
"ico" => "image/x-icon",
"wav" => "audio/wav",
"mp3" => "audio/mpeg",
"mp4" => "video/mp4",
"woff" => "application/font-woff",
"ttf" => "application/font-ttf",
"eot" => "application/vnd.ms-fontobject",
"otf" => "application/font-otf",
"wasm" => "application/wasm"
];
static var dir:String;
static var customDir:String;
static var hasCustomRes = false;
static var allowedLocalFiles:Map<String, Bool> = [];
static var allowLocalRequests = false;
public static function init(dir:String, ?customDir:String, allowLocalRequests:Bool):Void {
HttpServer.dir = dir;
if (customDir == null) return;
HttpServer.customDir = customDir;
hasCustomRes = FileSystem.exists(customDir);
HttpServer.allowLocalRequests = allowLocalRequests;
}
public static function serveFiles(req:IncomingMessage, res:ServerResponse):Void {
var url = req.url;
if (url == "/") url = "/index.html";
var filePath = dir + url;
if (allowLocalRequests && req.connection.remoteAddress == req.connection.localAddress
|| allowedLocalFiles[url]) {
if (serveLocalFile(res, url)) return;
}
if (!isChildOf(dir, filePath)) {
res.statusCode = 500;
var rel = JsPath.relative(dir, filePath);
res.end('Error getting the file: No access to $rel.');
return;
}
if (url.startsWith("/proxy")) {
if (!proxyUrl(req, res)) res.end('Cannot proxy ${req.url}');
return;
}
if (hasCustomRes) {
final path = customDir + url;
if (Fs.existsSync(path)) {
filePath = path;
if (FileSystem.isDirectory(filePath)) {
filePath = Path.addTrailingSlash(filePath) + "index.html";
}
}
}
Fs.readFile(filePath, (err:Dynamic, data:Buffer) -> {
if (err != null) {
readFileError(err, res, filePath);
return;
}
final ext = Path.extension(filePath).toLowerCase();
res.setHeader("Content-Type", getMimeType(ext));
if (ext == "html") {
// replace ${textId} to localized strings
data = cast localizeHtml(data.toString(), req.headers["accept-language"]);
}
res.end(data);
});
}
static function readFileError(err:Dynamic, res:ServerResponse, filePath:String):Void {
if (err.code == "ENOENT") {
res.statusCode = 404;
var rel = JsPath.relative(dir, filePath);
res.end('File $rel not found.');
} else {
res.statusCode = 500;
res.end('Error getting the file: $err.');
}
}
static function serveLocalFile(res:ServerResponse, filePath:String):Bool {
final ext = Path.extension(filePath).toLowerCase();
if (ext != "mp4" && ext != "mp3" && ext != "wav") return false;
if (!Fs.existsSync(filePath)) return false;
allowedLocalFiles[filePath] = true;
Fs.readFile(filePath, (err:Dynamic, data:Buffer) -> {
if (err != null) {
readFileError(err, res, filePath);
return;
}
res.setHeader("Content-Type", getMimeType(ext));
res.end(data);
});
return true;
}
static final matchLang = ~/^[A-z]+/;
static final matchVarString = ~/\${([A-z_]+)}/g;
static function localizeHtml(data:String, lang:String):String {
if (lang != null && matchLang.match(lang)) {
lang = matchLang.matched(0);
} else lang = "en";
data = matchVarString.map(data, (regExp) -> {
final key = regExp.matched(1);
return Lang.get(lang, key);
});
return data;
}
static function proxyUrl(req:IncomingMessage, res:ServerResponse):Bool {
final url = req.url.replace("/proxy?url=", "");
final url = try {
new URL(js.Node.global.decodeURI(url));
} catch(e) return false;
if (url.host == req.headers["host"]) return false;
final options = {
host: url.host,
port: Std.parseInt(url.port),
path: url.pathname + url.search,
method: req.method,
// headers: req.headers
};
final request = url.protocol == "https:" ? Https.request : Http.request;
final proxy = request(options, proxyRes -> {
proxyRes.headers["Content-Type"] = "application/octet-stream";
res.writeHead(proxyRes.statusCode, proxyRes.headers);
proxyRes.pipe(res, {end: true});
});
proxy.on("error", err -> {
res.end('Proxy error for ${url.href}');
});
req.pipe(proxy, {end: true});
return true;
}
static function isChildOf(parent:String, child:String):Bool {
final rel = JsPath.relative(parent, child);
return rel.length > 0 && !rel.startsWith('..') && !JsPath.isAbsolute(rel);
}
static function getMimeType(ext:String):String {
final contentType = mimeTypes[ext];
if (contentType == null) return "application/octet-stream";
return contentType;
}
}
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