[PROPOSAL] standard multivalue parameter mechanism
Dick Hardt
dick at sxip.com
Sat Sep 30 16:45:32 PDT 2006
Motivating Use Case
----------------------------
Passing multiple values for the same parameter, or lists is useful
for the protocol. Having a standard way of doing it will make it
easier for implementors and less prone to error. openid.signed takes
a list, and openid.ax.required and openid.ax.if_available apply to
zero or more items.
Given that multiple parameters is not desired due to 1) the
enumerated list for what was signed cannot have multiple values, and
2) a number of web application platforms are allergic to multiple
parameters of the same name, putting multiple values in the same
parameter separated by a delimiter is the other obvious option.
Proposed Implementation
-----------------------------------
Given that the comma "," is already being used as a delimiter for
openid.signed, that a comma be considered the delimiter for any
OpenID parameter.
The comma would then be an escape character in all OpenID strings,
and that if a comma is in a string, that it is escaped out with
another comma as such ",," ie. the string "Apt. 123, 55 Sesame St."
would be "Apt. 123, 55 Sesame St."
... suggestions for other delimiting mechanisms welcome!
-- Dick
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