Validate base64 URI safe strings

[tswindell]

Context

• node v10.15.3
• joi 14.3.1
• node
• express

What are you trying to achieve or the steps to reproduce ?

I'm attempting to validate a Base64 encoded string in the URL/Filename Safe profile. The spec defines this as:

NOTE: In the URL and Filename safe variant, character 62 (0x3E) is replaced with a "-" (minus sign) and character 63 (0x3F) is replaced with a "_" (underscore).

const schema = Joi.string().base64({paddingRequired: false}).validate('BMGzZagVwSz0WQl3DLrvdWI1HSNS9bO5kTp8tQf2ldEexg_sYGOQoi7hz7Uc0PUHRoCkHAjrTke5eY2H9beUYPI')

Which result you had ?

Validation Fails

What did you expect ?

Validation Should Succeed

[Marsup]

I'm going to qualify this as a request rather than a bug. You're asking for a variant of b64, that would likely require a new flag because not everyone wants that.