At 8:30 AM -0800 1/27/04, Thomas Russ wrote:
>On Jan 27, 2004, at 2:48 AM, Cristina Gema Muñoz Maya wrote:
>
>>Hello!!
>>
>> I'm doing an application (Criminal law Course) in CL-HTTP under
>> LispWork of Harlequin, but i've a problem. I'm going to show you part of the
>> code. I 've a html page, siidepe.html
>>...........
>><FORM ACTION="curso.html" METHOD="POST">
>>user<INPUT TYPE="text" NAME="NOMBRE" SIZE="10" VALUE="">
>>password<INPUT TYPE="passwd" NAME="NOMBRE" SIZE="10" VALUE="">
>>......
>>
>>
>> And when i submitted this form, the response function read from a
>> file which contain information of the user that do the course (the last page
>> visited, what they know about each topic,the pages that are known for them),
>> and this information is saved in global variables
>> (usuario,clave,pagnum,pagin,tema1,..).And i think this don't work when there
>> are 2 o more users using the course. So, can you advice me how can i do what
>> i want?.
>
>As you have noted, you can't really use global variables to hold this
>information, since even with a single thread, the interactions of multiple
>users can be interleaved. What you need to do instead is to make sure you can
>associate a particular user with the various sessions. Then, you will need to
>store a table, probably using hash-tables, which links the user name to the
>information you want to keep persistent across HTTP accesses.
>
>I think the simplest way to do this is to use the basic authentication
>services that are provided by CL-HTTP. Then you can get the user associated
>with each request and use that as an index into the global table that keeps
>your state information.
Or, you can hang information for a user off the user-object property list,
which is
easily accessed in the response function (user-object *server*). This
eliminates hashing into another data-structure. Or, you can mix your own class
into the user class ....
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