vendor/ezyang/htmlpurifier/library/HTMLPurifier/URIScheme.php

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<?php

/**
 * Validator for the components of a URI for a specific scheme
 */
abstract class HTMLPurifier_URIScheme
{

    /**
     * Scheme's default port (integer). If an explicit port number is
     * specified that coincides with the default port, it will be
     * elided.
     * @type int
     */
    public $default_port = null;

    /**
     * Whether or not URIs of this scheme are locatable by a browser
     * http and ftp are accessible, while mailto and news are not.
     * @type bool
     */
    public $browsable = false;

    /**
     * Whether or not data transmitted over this scheme is encrypted.
     * https is secure, http is not.
     * @type bool
     */
    public $secure = false;

    /**
     * Whether or not the URI always uses <hier_part>, resolves edge cases
     * with making relative URIs absolute
     * @type bool
     */
    public $hierarchical = false;

    /**
     * Whether or not the URI may omit a hostname when the scheme is
     * explicitly specified, ala file:///path/to/file. As of writing,
     * 'file' is the only scheme that browsers support his properly.
     * @type bool
     */
    public $may_omit_host = false;

    /**
     * Validates the components of a URI for a specific scheme.
     * @param HTMLPurifier_URI $uri Reference to a HTMLPurifier_URI object
     * @param HTMLPurifier_Config $config
     * @param HTMLPurifier_Context $context
     * @return bool success or failure
     */
    abstract public function doValidate(&$uri, $config, $context);

    /**
     * Public interface for validating components of a URI.  Performs a
     * bunch of default actions. Don't overload this method.
     * @param HTMLPurifier_URI $uri Reference to a HTMLPurifier_URI object
     * @param HTMLPurifier_Config $config
     * @param HTMLPurifier_Context $context