as i recall  decade ago.  that was the mantra!.  so maybe a few example of
how to accomplish this kind of process would be enough!!



On Sat, Jun 13, 2026, 9:25 AM Ray Satiro via curl-users <
[email protected]> wrote:

> On 6/12/2026 7:16 AM, Daniel Stenberg via curl-users wrote:
>
> On Fri, 12 Jun 2026, Ian Norton via curl-users wrote:
>
> curl -O URL —-hash sha256:HASH_VALUE​
>
> Does this sound like a good idea?
>
>
> It is an idea that is often brought up but has never been materialized. Is
> it good? I think it depends on how it is done so that in the end people
> would use it.
>
>
> Many years ago I wrote CURLOPT_SHA256 / CURLINFO_SHA256 to calculate the
> hash of the transfer body as received but there wasn't any interest so it
> wasn't adopted see https://github.com/curl/curl/issues/1399
>
> These days sha256 is more common and we have sha256 calculation code
> already in libcurl. So that part would be easier. But to handle partially
> downloaded data, resumed data, etc, is still a complication. You can
> already pipe curl to sha256 for verification, and ghedo gives an example in
> that issue of how to do it.
>
> Basically if you can do the unix pipe style to an existing tool that can
> handle it then is it worth putting that tool's functionality in curl, I
> guess is the question. What I mean is like grep should be grep, curl should
> be curl etc
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