char *z;
  const char *zType;
  char *zSemi;
  int len;
  const char *zRequestUri = cgi_parameter("REQUEST_URI",0);
  const char *zScriptName = cgi_parameter("SCRIPT_NAME",0);
  const char *zPathInfo = cgi_parameter("PATH_INFO",0);
#ifdef _WIN32
  const char *zServerSoftware = cgi_parameter("SERVER_SOFTWARE",0);
#endif

#ifdef FOSSIL_ENABLE_JSON
  int noJson = P("no_json")!=0;
  if( noJson==0 ){ json_main_bootstrap(); }
#endif
  g.isHTTP = 1;
  cgi_destination(CGI_BODY);
  if( zScriptName==0 ) malformed_request("missing SCRIPT_NAME");
#ifdef _WIN32
  /* The Microsoft IIS web server does not define REQUEST_URI, instead it uses
  ** PATH_INFO for virtually the same purpose.  Define REQUEST_URI the same as
  ** PATH_INFO and redefine PATH_INFO with SCRIPT_NAME removed from the 
  ** beginning. */
  if( zServerSoftware && strstr(zServerSoftware, "Microsoft-IIS") ){
    int i, j;
    cgi_set_parameter("REQUEST_URI", zPathInfo);
    for(i=0; zPathInfo[i]==zScriptName[i] && zPathInfo[i]; i++){}
    for(j=i; zPathInfo[j] && zPathInfo[j]!='?'; j++){}
    zPathInfo = mprintf("%.*s", j-i, zPathInfo+i);
    cgi_replace_parameter("PATH_INFO", zPathInfo);
  }
#endif
  if( zRequestUri==0 ){
    const char *z = zPathInfo;
    if( zPathInfo==0 ){
      malformed_request("missing PATH_INFO and/or REQUEST_URI");
    }
    if( z[0]=='/' ) z++;
    zRequestUri = mprintf("%s/%s", zScriptName, z);

    }else{
      lo = mid+1;
    }
  }

  /* If no match is found and the name begins with an upper-case
  ** letter, then check to see if there is an environment variable
  ** with the given name. Handle environment variables with empty values
  ** the same as non-existent environment variables.
  */
  if( zName && fossil_isupper(zName[0]) ){
    const char *zValue = fossil_getenv(zName);
    if( zValue && zValue[0] ){
      cgi_set_parameter_nocopy(zName, zValue, 0);
      CGIDEBUG(("env-match [%s] = [%s]\n", zName, zValue));
      return zValue;
    }
  }
  CGIDEBUG(("no-match [%s]\n", zName));
  return zDefault;