Facilitating the spread of knowledge and innovation in professional software development



Choose your language

InfoQ Homepage News Comma Delimited Cookies in ASP.NET with Parser Tool

Comma Delimited Cookies in ASP.NET with Parser Tool


ASP.NET does not provide support for comma delimited cookes which you will realize if you examine the source code for System.Web.HttpRequest class. You have to make use of semicolon charcter to work with cookies.

However, HTTP state management mechanism document of W3C (RFC2309) states that semicolon and comma are both valid characters to be used as a delimiter for cookie keys. But semicolon is commonly used by developers.

In order to implement comma delimited cookies in ASP.NET, you need to create a tool which simulates ASP.NET to parse cookies with comma instead of semicolon. The steps involved for the creation of a parser tool are as follows

  • Create HttpModule class that processes each and every request
  • Check for the existence of comma in cookie header
  • Parse and extract the cookies to put them in the collection

Keyvan Nayyeri, Software Engineer, has implemented the above mentioned steps in his parser tool. According to Keyvan, the parser tool does not work if comma is used in the value of cookies and developers will be able to test the module with Fiddler.

We need your feedback

How might we improve InfoQ for you

Thank you for being an InfoQ reader.

Each year, we seek feedback from our readers to help us improve InfoQ. Would you mind spending 2 minutes to share your feedback in our short survey? Your feedback will directly help us continually evolve how we support you.

Take the Survey

Rate this Article


Hello stranger!

You need to Register an InfoQ account or or login to post comments. But there's so much more behind being registered.

Get the most out of the InfoQ experience.

Allowed html: a,b,br,blockquote,i,li,pre,u,ul,p

Community comments

Allowed html: a,b,br,blockquote,i,li,pre,u,ul,p

Allowed html: a,b,br,blockquote,i,li,pre,u,ul,p


Is your profile up-to-date? Please take a moment to review and update.

Note: If updating/changing your email, a validation request will be sent

Company name:
Company role:
Company size:
You will be sent an email to validate the new email address. This pop-up will close itself in a few moments.