Gravatar: disable default avatar

[jpuffer]

Unavatar's fallback does not work for email, because bad email addresses trigger Gravatar's fallback and get Gravatar's default image. For example, see the result of https://unavatar.now.sh/myuser@domain.com - it is Gravatar's fallback image, not Unavatar's fallback.

[Kikobeats]

The problem is Gravatar is using a default image by default:
https://github.com/Kikobeats/unavatar/blob/master/src/providers/index.js#L17

I didn't find a way to disable this behavior. Any idea?

[Kikobeats]

Duplicate of #64

[jpuffer]

Hi @Kikobeats! First, awesome library.... really impressive work. Thanks for replying to this! I believe the behavior I pointed out is actually fixable by Unavatar.

See the following:
https://unavatar.now.sh/user@domain.com?fallback=https://domain.com/myimage.jpg&json
returns {"url":"https://gravatar.com/avatar/cd2bfcffe5fee4a1149d101994d0987f?size=400&d="} but Gravatar gives the option of passing through the default image (urlencoded) into the d= parameter (see https://en.gravatar.com/site/implement/images#default-image). The above request should instead return {"url":"https://gravatar.com/avatar/cd2bfcffe5fee4a1149d101994d0987f?size=400&d=https%3A%2F%2Fdomain.com%2Fmyimage.jpg"}

If a user does not provide a fallback parameter to unavatar, then it should create the gravatar url with d=404 so unavatar can use its own fallback. Currently, it does not set the d value (see https://unavatar.now.sh/user@domain.com?json) which returns {"url":"https://gravatar.com/avatar/cd2bfcffe5fee4a1149d101994d0987f?size=400&d="} but should instead return {"url":"https://gravatar.com/avatar/cd2bfcffe5fee4a1149d101994d0987f?size=400&d=404"}

[Kikobeats]

Oh thanks for this reply, I wanted to change the gravatar behavior for a long time!

Can you make a PR? 🙂

[jpuffer]

Sure! #68