Code review comment for lp://staging/~wligtenberg/django-openid-auth/mysql_fix
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| James Henstridge (jamesh) wrote | # |
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The only thing the OpenID specification says about the Claimed Identifier is that it is either (a) a normalised URL or (b) an XRI.
So there is nothing in the specification that would limit it to 255 characters. That said, I don't know whether you'd find any longer than 255 characters in real life.
For normal OpenID authentication requests it would be a bit unwieldy to type an identity URL that long, but for identifier select mode a provider might be able to get away with it without driving away users. That said, I don't know if any do.