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Domain problem.

Posted on 2006-06-12
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Last Modified: 2010-03-31
Hi experts,
  I'm trying to acsess a cookie created for domain ".xyz" in another domain ".abc". Is it possible. If yes or if no can you provide any location/url where I can get complete information about this issue.

Also I want the specification for identifing a valid domain name,
like is ".abc" a valid domain name only ,"com", ".edu" etc. are the only valid domain names. It would be great if you can provide any link or url where I can get the complete information.

Karan
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Question by:Manish
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Accepted Solution

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TimYates earned 65 total points
ID: 16884006
Not possible...

Cookies are private to the domain that created them...

For obvious reasons :-)

Tim
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Author Comment

by:Manish
ID: 16884048
What about valid domain name q?
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Assisted Solution

by:Mayank S
Mayank S earned 35 total points
ID: 16884061
http://support.rapidsystem.net/ntfaq/r80.html says "The rules are 67 characters including the extension (e.g. .com, .net, .org, etc.). The domain name without the extension can be up to 63 characters. Only 0-9, a-z and the dash "-" are valid characters. The domain name cannot start or end with a dash."

http://www.digitaldaze.com/servers/support/help/dns_valid.html

http://www.shauninman.com/plete/2006/05/validating-domain-names

probably this is the most comprehensive one:

http://www.101domain.com/domain_help_faq_19.htm
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Expert Comment

by:TimYates
ID: 16884062
http://www.shauninman.com/plete/2006/05/validating-domain-names

Someone there also brings up the very valid point that this will block IP addresses, which may not be satisfactory :-(

Tim
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Expert Comment

by:TimYates
ID: 16884065
...bah ;-)
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Expert Comment

by:Mayank S
ID: 16884068
He he.... no problemo (like Arnold in Terminator 2)
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Author Comment

by:Manish
ID: 16891929
Is Cookie formed by
     http://abc.us.xyz website accessible to
     http://mno.ca.xyz ?
If yes , how?
If no,  then what to do?

In above URL what is domain? is it .us.xyz or .xyz?
What makes valid domain extention?
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Expert Comment

by:Mayank S
ID: 16891975
No, it should not be accessible.

For domain extension, I don't think there are any rules other than what I posted above.
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Expert Comment

by:TimYates
ID: 16892131
>> If no,  then what to do?

What are you trying to do?  Share data between websites?
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Author Comment

by:Manish
ID: 16892230
>>What are you trying to do?  Share data between websites?
Yes, cookie data.
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Expert Comment

by:TimYates
ID: 16892241
So you're trying to read cookie data from someone elses website?

You can't :-(

If both websites belong to you, then you may be able to do some sort of message passing between them to tie users together and share user data that way, but you can't just read cookies written by other sites...

It would be a huge security hole if you could...

Tim
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Author Comment

by:Manish
ID: 16892272
Ya Tim,
  Your second point is correct ,
What kind of message do I need to pass ?
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Expert Comment

by:Mayank S
ID: 16892304
It could be through a web-service or simply an HTTP post that you can send to a web-site:

http://www.javaalmanac.com/egs/java.net/Post.html 
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Expert Comment

by:TimYates
ID: 16892333
If you have a single user database, then it will become easier, as user id credentials will be the same on both sites...
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Author Comment

by:Manish
ID: 16892339
Didnt get your point?
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Expert Comment

by:TimYates
ID: 16892377
Can you explain properly what data it is you're trying to share?

We're shooting in the dark with suggestions otherwise
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Author Comment

by:Manish
ID: 16892602
My application is accessible through more than one domain. Domains are region specific, region most of the time are locale. Earlier my application was creating cookies which were accessible by that domain only eg ".ab.pqrs". Now I want the cookies generated in ".ab.pqrs" to be accessible by another domain ".ed.pqrs". From the above discussion it is clear that one cookie of one domain is not accessible by another domain. But my requirements are such that I want alternative for it.
Cookie basically contains information related to user preferences for the user who logged in like country, locale, few numbers used by application, etc.
I want to know how can I do this?
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Expert Comment

by:TimYates
ID: 16892628
why not store these preferences in a database shared between the webapps?

Then when a user logs in, the cookie can just store their session id, and their preferences can be loaded from the database, no matter which site they log in to...

Tim
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Author Comment

by:Manish
ID: 16893088
In my case I can't store in Database. It should be handled throughs cookies only.
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Expert Comment

by:Mayank S
ID: 16893135
It should be handled as request parameters then, I guess.
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Expert Comment

by:TimYates
ID: 16893139
>> It should be handled throughs cookies only.

The problem is, it can't be
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