mod.ts

import { toFileUrl } from "https://deno.land/std@0.208.0/path/mod.ts"

import { Untar } from "https://deno.land/std@0.208.0/archive/untar.ts"

import {
    readerFromStreamReader,
    readableStreamFromReader,
} from "https://deno.land/std@0.208.0/streams/mod.ts"

const readableStream = await fetch(
    "https://github.com/dalkak2/dotent-js/raw/main/test/1.ent"
).then(res => res.body)!

const decompressedReadableStream = readableStream!.pipeThrough(
    new DecompressionStream("gzip")
)
const streamReader = decompressedReadableStream.getReader()

const untar = new Untar(readerFromStreamReader(streamReader))

let result: ReadableStream

for await (const entry of untar) {
    console.log(entry.fileName)
    if (entry.fileName.endsWith("/project.json")) {
        result = readableStreamFromReader(entry)
        break
    }
}

Deno.serve(
    req => {
        return new Response(result, {
            headers: {
                "content-type": "application/json"
            }
        })
    }
)