On 06/08/2007, at 8:08 PM, Ray Ackland wrote:
I am about to start creating a WO application that will mainly be
used internally, but will let external people update their own
details.
To do this, a url would be emailed out to the people in question,
and clicking on the link will take them to their details.
I expect that direct actions will play a main role here, but my
problems is creating the url string that is unique for each person,
difficult to guess a valid one, and reversible.
One option is to generate a large random seed value (you can use a
UUID generator for this) and SHA or MD5 hash the result and then
check that it doesn't already exist. It doesn't need to be reversible.
I have had a look at hashCode(), but I would need to combine
several to increase the length (and hence number of possible
values) and it would need to be reversible in order to take the
string and turn it back into the record.
On that point, I suppose it is just a case of storing the hashed
code in the user record and basing the object fetch on that.
Yep, no need to reverse the code, or expose a primary key, just look
for the record that has the matching hash value. Just remember to
index the hashcode column in your database.
So now that I think I've figured it out, can someone suggest a
better way that I'm overlooking and may already be available?
Ray.
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