# `Storehouse.Live.Writer`
[🔗](https://github.com/hattoriai/storehouse/blob/v0.1.0/lib/storehouse/live/writer.ex#L2)

A LiveView upload writer (`Phoenix.LiveView.UploadWriter`) that streams
each chunk on to the store as it comes, with no file on the app's disk:
to S3 in the parts of a multipart upload, to the local disk in its
place. `Storehouse.Live.allow/3` with `mode: :stream` gives it to the
upload.

It checks the file as it comes: its first bytes, once it has them, are
of the type the browser claimed, of a type taken (`:accept`) and within
`:max_pixels`, or the upload stops, and nothing of it stays in the
store. Its checksum is computed on the way.

It runs in the upload's own process (a LiveView upload channel): a
file's parts go to the store while the next chunks arrive, and the
LiveView goes on meanwhile.

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*Consult [api-reference.md](api-reference.md) for complete listing*