emit_esm_server

Produce ad-hoc ESM given a deno GitHub module URL.

input:

One of:

• HTTP GET <origin>/denoland/x/:pkg[@:version]/path/to/mod.ts
• HTTP GET <origin>/github/:owner/:repo/:branch/path/to/mod.ts

When a module includes a URL to an external module (https://foo.org/bar/mod.ts), it is rewritten to <ESM_EMIT_SERVER_ORIGIN>?moduleUrl=<url>

output: ESM source code

configuration

• EMIT_SERVER_ORIGIN - the origin of where your server is hosted. used to rewrite HTTP imports back to your server

warning

Non-production ready :)

Example

• (optional) build the server: docker build --platform linux/arm64/v8 --progress=plain -t cdaringe/deno_emit_server .
• run the server: docker run --platform linux/arm64/v8 --rm -p 7777:7777 cdaringe/deno_emit_server
• request a TypeScript module as an ECMAScript Module: curl localhost:7777/github/denoland/deno_std/main/log/logger.ts

// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
import { getLevelByName, getLevelName, LogLevels } from "./levels.ts";
export class LogRecord {
    msg;
    #args;
    #datetime;
    level;
    levelName;
    loggerName;
// ...snip snip...

todo

• source rewrite
  • when imports to foreign TS sources detected
    • detect if they can be re-written
    • if they can, do it
    • if they cant, 400 with meaningful error message. “source importing from XYZ, but unable to convert XZY to JS”… or…
      • just rewrite the current host, and add a ?src=encodedUrl