iCalendar publishing doesnt work

Jared,

Fortunately I decided to dive into the code tonight and see if I couldn't get the functionality that I needed. I succeeded and am now able to publish to my WebCalendar embedded in Drupal. Here are the relevant code snippets:

The first is an additional function that had to be ported to the user-app-drupal.php file. This can simply be placed at the bottom of the user-app-drupal.php file and included for future releases of the module (once the code has been tested of course).

/**
 * Check to see if a given login/password is valid.
 *
 * If invalid, the error message will be placed in $error. If true the webcal user will be placed in the returned variable.
 *
 * @param string $login    User login
 * @param string $password User password
 * @param bool $#silent  if truem do not return any $error
 *
 * @return string Webcal username on True, returns bool FALSE otherwise
 *
 * @global string Error message
 */
function user_valid_login ( $login, $password, $silent=false ) {
  global $error, $app_user_table, $app_session_table;
  global $app_host, $app_login, $app_pass, $app_db, $app_same_db;
  global $c, $db_host, $db_login, $db_password, $db_database;
  $ret = false;
  
  if ($app_same_db != '1') {
  	$c = dbi_connect($app_host, $app_login, $app_pass, $app_db);
  }
  $res = dbi_execute ( "SELECT name, uid FROM $app_user_table WHERE name = ? AND pass = ?" , array ( $login , md5( $password ) ) );
  if ( $res ) {
    $row = dbi_fetch_row ( $res );
    if ( $row && $row[0] != '' ) {
      // MySQL seems to do case insensitive matching, so double-check
      // the login.
      if ( $row[0] == $login ) {
        $ret = $row[1]; //found login & password
      } else if ( ! $silent ) {
        $error = translate ( 'Invalid login', true ) . ': ' .
          translate( 'incorrect password', true );
      }
    } else if ( ! $silent ) {
      	$error = translate ( 'Invalid login', true );
     	 	// Could be no such user or bad password
      	// Check if user exists, so we can tell.
      	$res2 = dbi_execute ( "SELECT name, uid FROM $app_user_table WHERE name = ?" , array ( $login ) );
      	if ( $res2 ) {
        	$row = dbi_fetch_row ( $res2 );
        	if ( $row && ! empty ( $row[0] ) ) {
          	// got a valid username, but wrong password
          	$error = translate ( 'Invalid login', true ) . ': ' .
           	 translate( 'incorrect password', true );
        	} else {
          	// No such user.
          	$error = translate ( 'Invalid login', true) . ': ' .
            translate( 'no such user', true );
        	}
        	dbi_free_result ( $res2 );
      	}
    	}
   	 dbi_free_result ( $res );
  	} else if ( ! $silent ) {
    $error = db_error();
  }
  // if application is in a separate db, we have to connect back to the webcal db
  if ($app_same_db != '1') {
  	$c = dbi_connect($db_host, $db_login, $db_password, $db_database);
	}
		return $ret;
}

The other issue that had to be resolved was in the icalclient.php file, I have highlighted where the changed lines are. It would probably be worthwhile to produce an icalclient.php file that drupal users can simply drop in a replace (similar to what we have to do with the login-app.php file).

unset ($_ENV['REMOTE_USER']);
if ( empty ( $login ) ) {
  if (!isset($_SERVER['PHP_AUTH_USER'])) {
    unset($_SERVER['PHP_AUTH_PW']);
    header('WWW-Authenticate: Basic realm="' . $appStr . '"' );
    header('HTTP/1.0 401 Unauthorized');
    exit;

  } else {
    $valid_login = ( user_valid_login ( $_SERVER['PHP_AUTH_USER'],
      $_SERVER['PHP_AUTH_PW'], false ) );
    if($valid_login) {
      $login = $valid_login;
    } else {

      unset($_SERVER['PHP_AUTH_USER']);
      unset($_SERVER['PHP_AUTH_PW']);
      //TODO should be able code this better to eliminate duplicate code
      header('WWW-Authenticate: Basic realm="' . $appStr . '"' );
      header('HTTP/1.0 401 Unauthorized');
      exit;
    } 
  }
}