eeeb3017d6
Attempting to use the [web auth fallback mechanism](https://spec.matrix.org/v1.5/client-server-api/#fallback) for Google ReCAPTCHA with the default setting for `client_api.recaptcha_sitekey_class` of "g-recaptcha-response" results in no captcha being rendered:  I cross-checked the captcha code between [dendrite.matrix.org's fallback page](https://dendrite.matrix.org/_matrix/client/r0/auth/m.login.recaptcha/fallback/web?session=asdhjaksd) and [matrix-client.matrix.org's one](https://matrix-client.matrix.org/_matrix/client/r0/auth/m.login.recaptcha/fallback/web?session=asdhjaksd) (which both use the same captcha public key) and noticed a discrepancy in the `class` attribute of the div that renders the captcha. [ReCAPTCHA's docs state](https://developers.google.com/recaptcha/docs/v3#automatically_bind_the_challenge_to_a_button) to use "g-recaptcha" as the class for the submit button. I noticed this when user `@parappanon:parappa.party` reported that they were also seeing no captcha being rendered on their Dendrite instance. Changing `client_api.recaptcha_sitekey_class` to "g-recaptcha" caused their captcha to render properly as well. There may have been a change in the class name from ReCAPTCHA v2 to v3? The [docs for v2](https://developers.google.com/recaptcha/docs/display#auto_render) also request one uses "g-recaptcha" though. Thus I propose changing the default setting to unbreak people's recaptcha auth fallback pages. Should fix dendrite.matrix.org as well. |
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|---|---|---|
| .. | ||
| config.go | ||
| config_appservice.go | ||
| config_clientapi.go | ||
| config_federationapi.go | ||
| config_global.go | ||
| config_jetstream.go | ||
| config_keyserver.go | ||
| config_mediaapi.go | ||
| config_mscs.go | ||
| config_roomserver.go | ||
| config_syncapi.go | ||
| config_test.go | ||
| config_userapi.go | ||
