7 April 2002:  SREhttp/2: Using the HOME_DIR SREHTTP2.CFG variable

HOME_DIR: The "home directory" -- used as a text replacement whenever 
          a ~ is encountered in a request selector.

A typical value of this would be "Users/".

Example: 
    If:                           HOME_DIR='USERS/'
    and the request selector is:  /~GERALD/RESUME.HTM
    then SREhttp/2 will use:      /USERS/GERALD/RESUME.HTM

    

ADVANCED OPTION: Specifying User Subdirectories

   In many cases, you may wish clients to have access to particular
   subdirectories of your "Users" directories.  For example, all
   "students" may have space on the server machine, some of which
   is used for web, and some for "personal" purposes. The goal is 
   to give clients direct access to the "web" related directories
   but not to the "personal" directories.

   This can be achieved by including a $ in the HOME_DIR parameter.
   Specifically, the $ is replaced by the substring between 
   the  ~ and the first / following the ~.

   For example:
     If:                            HOME_DIR=USERS/$/WWW
     and the request selector is:  /~GERALD/RESUME.HTM
     Then SREhttp/2 will use:     /USERS/GERALD/WWW/RESUME.HTM
   Summarizing, given a $ in the HOME_DIR.
     1) SREhttp/2 reads the substring (of the request selector) 
        between ~ and the first / following the ~ 
        For example: GERALD
     2) The substring is deleted from the request selector 
        For example: /~/RESUME.HTM
     3) The $ in the HOME_DIR is replaced with this substring (from step 1)
        For example: USERS/GERALD/WWW
     4) The ~ in the modified request selector (from step 2) is replaced 
        with the modified HOME_DIR (from step 3)
        For example: /USERS/GERALD/WWW/RESUME.HTM
     

NOTES:

 * Caution: ~/ADIR/name.ext is different then ~ADIR/name.ext

 * HOME_DIR substitution occurs immediately after INTERNAL redirection.
   Thus, you can use ~ in a selector-specific internal redirection, and this
   ~ will be replaced by the HOME_DIR (see ATTRIBS.HTM for details on 
   redirection).
  
 * HOME_DIR substitution occurs immediately before  "adding a trailing slash".
   Thus, a request-selector of ~JOE2  could be converted to
   USERS/JOE2/

 * HOME_DIR will not be attempted if an TEMP, PERM, or NOTIFY redirection
   has been specified.

 * HOME_DIR for ~ substitution is also used when resolving filenames
   requested in server side includes.

 * CAUTION: Since HOME_DIR is used in a direct textual substitution, 
            only a mild degree of syntax checking  is attempted. 
            In particular, // are  converted to /.  
            To be safe, be sure your use of ~ is internally consistent.