handwritten-signature and base64

[Jarosław Kowalewski]

Hi,

I'm trying to change type of the control from anyURI to base64Binary and it almost works. Almost because below there is no correct base64 format. 

I the result FR reports error. 

demo https://demo.orbeon.com/demo/fr/orbeon/builder/edit/456f0d628bae89c2521d59c63f42751eded07392

Is it any way to fix it somehow? 

Tested also in 2018.2.4 PE

//Jarek

[Alessandro Vernet]

Hi Jarek,

What do you mean by "change type of the control from anyURI to
base64Binary"? What are you doing exactly? And why, i.e. what are you trying
to achieve?

‑Alex

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[Jarosław Kowalewski]

Hi Alex,

I changed type in the bind from type="xf:anyURI" to "xs:base64Binary" as in the example url.

My goal is to have a signature encoded in base64 in the model instead of using URI to the saved content. Exactly the same as we have in the attachments.

//Jarek

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[Alessandro Vernet]

Hi Jarek,

The data is stored with the data URL (see link below). As you noted, that
URL has base64 prefixed by `data:image/png;base64,`, but isn't
`xs:base64Binary`. And this is why in the form definition, Form Builder puts
`<xf:bind type="xf:anyURI"/>`. This is correct, as a data URL is an
`xf:anyURI`.

Now you're saying that you would prefer the signature to be stored in
straight base64, so the form definition could have the type
`xs:base64Binary`? If so, is it maybe because you have a use case where it
is more convenient to have straight base64 than a data URL that contains
base64?

https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/Data_URIs

[Alessandro Vernet]

Hi Jarek,

Have you found a way to do what you were aiming for with regard to the
signature component and how the signature itself is stored in the form data?

[Jarosław Kowalewski]

Hi Alex,

yes, all is clear. I must have had some sort of a blackout.

I thought that to have base64 I need to change the type from xf:anyURI to xs:base64Binary. 

//Jarek

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[Alessandro Vernet]

Hi Jarek,

Got it, perfect then! (And I have to admit that I had at first been confused
my self, and thought that using `xf:anyURI` for the signature was a bug… but
it isn't.)

-Alex