Fossil

** The "diff" tag covers all diffing pages such as /vdiff, /fdiff, and
** /vpatch.  The "annotate" tag also covers /blame and /praise.  "zip"
** also covers /tarball and /sqlar.  If a tag has an "X" character appended,
** then it only applies if query parameters are such that the page is
** particularly difficult to compute. In all other case, the tag should
** exactly match the page name.
**
** Change this setting "off" to disable all robot restrictions.
*/

/*
** Return the default restriction GLOB
*/
const char *robot_restrict_default(void){
  return "timelineX,diff,annotate,zip,fileage,file";

int robot_restrict(const char *zPage){
  const char *zGlob;
  const char *zToken;
  static int bKnownPass = 0;
  if( g.zLogin ) return 0;    /* Logged in users always get through */
  if( bKnownPass ) return 0;  /* Already known to pass robot restrictions */
  zGlob = db_get("robot-restrict",robot_restrict_default());
  if( zGlob==0 || zGlob[0]==0 || fossil_strcmp(zGlob, "off")==0 ){
    bKnownPass = 1;
    return 0;   /* Robot restriction is turned off */
  }
  if( !glob_multi_match(zGlob, zPage) ) return 0;
  zToken = P("token");
  if( zToken!=0
   && db_exists("SELECT 1 FROM config"
                " WHERE name='token-%q'"
                "   AND json_valid(value,6)"
                "   AND value->>'user' IS NOT NULL", zToken)