Deno: [not implemented]: POST tar file with Deno

[alexanderGalushka]

using fetch() to POST tar file implementation:

    const ab = new ArrayBuffer(1024 * 1024);
    const buf = new Buffer(ab);
    const mw = new MultipartWriter(buf);
    const f = await open(path.resolve('test.tar'), {
        read: true,
    });
    await mw.writeFile('myTestField', 'test.tar', f);
    const contentType = mw.formDataContentType();
    await mw.close();
    f.close();

    const response1 = await fetch('http://localhost:8080/test', {
        headers: [
            ['Content-Type', contentType]
        ],
        method: 'POST',
        body: ab,
    });

    if (response != undefined) {
        await response.arrayBuffer();
        assertEquals(200, response.status);
    }

fails with ReadableStream:

Error: not implemented
    at Object.notImplemented ($deno$/util.ts:64:9)
    at fetch ($deno$/web/fetch.ts:572:11)

Is there an alternative way to have it done in Deno?

[bartlomieju]

@marcosc90 I think you had a similar PR but cannot find it

[marcosc90]

Looks like this https://github.com/denoland/deno/pull/5831

[bartlomieju]

Thanks @marcosc90. This issue is still valid as ReadableStream variant is not implemented.

[marcosc90]

Supporting ReadableStreams is fairly easy on TS side. I don't know rust yet to modify op_fetch so we get a resource we can write to.

related to https://github.com/denoland/deno/pull/6093

[alexanderGalushka]

@marcosc90 thank you for looking into this issue!