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fix host script

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This commit is contained in:
Matthieu Jolimaitre 2024-05-15 00:33:42 +02:00
parent 52cc33f807
commit 62cd230d5b
1 changed files with 16 additions and 19 deletions
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35
cc-tweaked/host.ts
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@ -1,32 +1,29 @@
#!/bin/env -S deno run --allow-read --allow-net
async function main() {
const [program_path] = Deno.args;
if (program_path === undefined) fail_with("Usage: host.ts <program_path>");
const port = 1728;
const server = Deno.serve({ port }, () => handle(program_path));
const server = Deno.serve({ port }, (request) => handle(request));
await server.finished;
}
async function handle(program_path: string) {
console.log("Serving", program_path);
const file = await try_else(
() => Deno.open(program_path, { read: true }),
() => fail_with("Program at", program_path, "does not exists"),
);
return new Response(file.readable);
async function handle(request: Request) {
const script = await open_requested_script(request);
if (script instanceof Response) return script;
console.log("Serving", script.path);
return new Response(script.content.readable);
}
function fail_with(...message: string[]) {
console.error(...message);
return Deno.exit(1);
}
async function try_else<T>(operation: () => T | Promise<T>, on_error: (error: unknown) => T | Promise<T>) {
async function open_requested_script(request: Request) {
const requested_path = new URL(request.url).pathname.slice(1);
const invalid = () => new Response("Invalid script.", { status: 400 });
if (requested_path.includes("/")) return invalid();
if (requested_path.includes(".")) return invalid();
try {
return await operation();
} catch (error) {
return await on_error(error);
const path = "./scripts/" + requested_path + ".lua";
const content = await Deno.open(path, { read: true });
return { path, content };
} catch (_) {
return new Response("Unknown script.", { status: 400 });
}
}