Val Town is a social website to write and deploy JavaScript.
Build APIs and schedule functions from your browser.
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import { extractValInfo } from "https://esm.town/v/pomdtr/extractValInfo";
import { gfm } from "https://esm.town/v/pomdtr/gfm";
import { readme } from "https://esm.town/v/pomdtr/readme";
import { Hono } from "npm:hono";
import { HTTPException } from "npm:hono/http-exception";
import mime from "npm:mime";
const app = new Hono();
const { author, name } = extractValInfo(import.meta.url);
async function extractStaticContent(code: string) {
const blob = new Blob([code], { type: "text/javascript" });
const url = URL.createObjectURL(blob);
const exports = await import(url);
if (exports.default) {
return exports.default;
}
const values = Object.values(exports);
if (values.length == 1) {
return values[0];
}
return "";
}
app.get("/", async c => {
const html = await gfm(await readme(author, name));
return c.html(html);
});
app.get("/:filename", async c => {
const { filename } = c.req.param();
const [name, ext] = filename.split(".");
// we check that we are not exposing private vals
const resp = await fetch(`https://api.val.town/v1/alias/${author}/${name}`, {
headers: {
authorization: `Bearer ${Deno.env.get("valtown")}`,
},
});
if (!resp.ok) {
return resp;
}
const { code, privacy } = await resp.json();
if (privacy == "private") {
throw new HTTPException(404);
}
const content = await extractStaticContent(code);
if (typeof content !== "string") {
throw new HTTPException(500, { message: `val @${author}/${name} is not a static val: ${content}` });
}
return new Response(content, {
headers: {
"Content-Type": mime.getType(ext),
},
});
});
export default app.fetch;