HTTP call inside validation function in design document?

[hubodz]

Hello,
I try to invoke a HTTP call while validating the document (perfectly, I would like to be able to perform the validation in an external endpoint), but when trying to use fetch or create XMLHttpRequest object, I get a ReferenceError.

Is it expected, or there is some kind of bug?

Thanks!

[rnewson]

This is deliberately prohibited. a validate_doc_update function can only depend on the input parameters and is sandboxed to prevent any network or file access. This is to ensure the result is deterministic.

[hubodz]

Thank you!