2 replies

I was wondering if it is possible to

I was wondering if it is possible to pipe an (image) stream into FormData? I currently have this setup:

const { readable, writable } = new TransformStream();
req.body.pipeTo(writable);

const formData = new FormData();
formData.append(
  "file",
  readable,
  "test.jpg"
);

const response = await fetch(
  "...",
  {
    method: "POST",
    body: formData
  }
);

const { readable, writable } = new TransformStream();
req.body.pipeTo(writable);

const formData = new FormData();
formData.append(
  "file",
  readable,
  "test.jpg"
);

const response = await fetch(
  "...",
  {
    method: "POST",
    body: formData
  }
);

Which does not work - at least when uploading the image to Cloudflare Images, it says that the image has an incorrect mime type. If I read the whole body and append it into the form data, it does work as expected - but since that obviously isn't recommended because of the memory limit, I don't like that approach. I couldn't find anything on the interwebz

Cloudflare Developers•3y ago•

2 replies

Fabian

I was wondering if it is possible to

I was wondering if it is possible to pipe an (image) stream into FormData? I currently have this setup:

const { readable, writable } = new TransformStream();
req.body.pipeTo(writable);

const formData = new FormData();
formData.append(
  "file",
  readable,
  "test.jpg"
);

const response = await fetch(
  "...",
  {
    method: "POST",
    body: formData
  }
);

const { readable, writable } = new TransformStream();
req.body.pipeTo(writable);

const formData = new FormData();
formData.append(
  "file",
  readable,
  "test.jpg"
);

const response = await fetch(
  "...",
  {
    method: "POST",
    body: formData
  }
);

I was wondering if it is possible to

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