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/*******************************************************************************
* Copyright 2012 Anteros Tecnologia
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*******************************************************************************/
package br.com.anteros.bean.validation.constraints;
import static java.lang.annotation.ElementType.ANNOTATION_TYPE;
import static java.lang.annotation.ElementType.CONSTRUCTOR;
import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.ElementType.PARAMETER;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
import java.lang.annotation.Documented;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;
import br.com.anteros.validation.api.Constraint;
import br.com.anteros.validation.api.Payload;
/**
* Validate a rich text value provided by the user to ensure that it contains no malicious code, such as embedded
* <script> elements.
*
* Note that this constraint assumes you want to validate input which represents a body fragment of an HTML document. If
* you instead want to validate input which represents a complete HTML document, add the {@code html}, {@code head} and
* {@code body} tags to the used whitelist as required.
*
* @author George Gastaldi
*/
@Documented
@Constraint(validatedBy = { })
@Target({ METHOD, FIELD, ANNOTATION_TYPE, CONSTRUCTOR, PARAMETER })
@Retention(RUNTIME)
public @interface SafeHtml {
String message() default "{br.com.anteros.bean.validation.constraints.SafeHtml.message}";
Class[] groups() default { };
Class[] payload() default { };
/**
* @return The built-in whitelist type which will be applied to the rich text value
*/
WhiteListType whitelistType() default WhiteListType.RELAXED;
/**
* @return Additional whitelist tags which are allowed on top of the tags specified by the
* {@link #whitelistType()}.
*/
String[] additionalTags() default { };
/**
* @return Allows to specify additional whitelist tags with optional attributes.
*/
Tag[] additionalTagsWithAttributes() default { };
/**
* Allows to specify whitelist tags with specified optional attributes. Adding a tag with a given attribute also
* whitelists the tag itself without any attribute.
*/
@Target({ METHOD, FIELD, ANNOTATION_TYPE, CONSTRUCTOR, PARAMETER })
@Retention(RUNTIME)
@Documented
public @interface Tag {
/**
* @return the tag name to whitelist.
*/
String name();
/**
* @return list of tag attributes which are whitelisted.
*/
String[] attributes() default { };
}
/**
* Defines several {@code @SafeHtml} annotations on the same element.
*/
@Target({ METHOD, FIELD, ANNOTATION_TYPE, CONSTRUCTOR, PARAMETER })
@Retention(RUNTIME)
@Documented
public @interface List {
SafeHtml[] value();
}
/**
* Defines default whitelist implementations.
*/
public enum WhiteListType {
/**
* This whitelist allows only text nodes: all HTML will be stripped.
*/
NONE,
/**
* This whitelist allows only simple text formatting: b, em, i, strong, u. All other HTML (tags and
* attributes) will be removed.
*/
SIMPLE_TEXT,
/**
* This whitelist allows a fuller range of text nodes:
* a, b, blockquote, br, cite, code, dd, dl, dt, em, i, li, ol, p, pre, q, small, strike, strong, sub, sup, u, ul
* , and appropriate attributes.
*
* Links (a elements) can point to http, https, ftp, mailto, and have an enforced
* rel=nofollow attribute.
*
* Does not allow images.
*/
BASIC,
/**
* This whitelist allows the same text tags as {@link WhiteListType#BASIC}, and also allows img
* tags,
* with
* appropriate attributes, with src pointing to http or https.
*/
BASIC_WITH_IMAGES,
/**
* This whitelist allows a full range of text and structural body HTML:
* a, b, blockquote, br, caption, cite, code, col, colgroup, dd, dl, dt, em, h1, h2, h3, h4, h5, h6, i, img, li,
* ol, p, pre, q, small, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, u, ul
*
* Links do not have an enforced rel=nofollow attribute, but you can add that if desired.
*
*/
RELAXED
}
}