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• Jsoup.java

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com.itextpdf.styledxmlparser.jsoup.Jsoup Maven / Gradle / Ivy

/*
    This file is part of the iText (R) project.
    Copyright (c) 1998-2019 iText Group NV
    Authors: iText Software.

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License version 3
    as published by the Free Software Foundation with the addition of the
    following permission added to Section 15 as permitted in Section 7(a):
    FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
    ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
    OF THIRD PARTY RIGHTS

    This program is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
    or FITNESS FOR A PARTICULAR PURPOSE.
    See the GNU Affero General Public License for more details.
    You should have received a copy of the GNU Affero General Public License
    along with this program; if not, see http://www.gnu.org/licenses or write to
    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
    Boston, MA, 02110-1301 USA, or download the license from the following URL:
    http://itextpdf.com/terms-of-use/

    The interactive user interfaces in modified source and object code versions
    of this program must display Appropriate Legal Notices, as required under
    Section 5 of the GNU Affero General Public License.

    In accordance with Section 7(b) of the GNU Affero General Public License,
    a covered work must retain the producer line in every PDF that is created
    or manipulated using iText.

    You can be released from the requirements of the license by purchasing
    a commercial license. Buying such a license is mandatory as soon as you
    develop commercial activities involving the iText software without
    disclosing the source code of your own applications.
    These activities include: offering paid services to customers as an ASP,
    serving PDFs on the fly in a web application, shipping iText with a closed
    source product.

    For more information, please contact iText Software Corp. at this
    address: [email protected]
 */
package com.itextpdf.styledxmlparser.jsoup;

import com.itextpdf.styledxmlparser.jsoup.nodes.Document;
import com.itextpdf.styledxmlparser.jsoup.parser.Parser;
import com.itextpdf.styledxmlparser.jsoup.safety.Cleaner;
import com.itextpdf.styledxmlparser.jsoup.safety.Whitelist;
import com.itextpdf.styledxmlparser.jsoup.helper.DataUtil;
import com.itextpdf.styledxmlparser.jsoup.parser.XmlTreeBuilder;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;

/**
 The core public access point to the jsoup functionality.

 @author Jonathan Hedley */
public class Jsoup {
    private Jsoup() {}

    /**
     Parse HTML into a Document. The parser will make a sensible, balanced document tree out of any HTML.

     @param html    HTML to parse
     @param baseUri The URL where the HTML was retrieved from. Used to resolve relative URLs to absolute URLs, that occur
     before the HTML declares a {@code } tag.
     @return sane HTML
     */
    public static Document parse(String html, String baseUri) {
        return Parser.parse(html, baseUri);
    }


    /**
     Parse HTML into a Document, using the provided Parser. You can provide an alternate parser, such as a simple XML
     (non-HTML) parser.

     @param html    HTML to parse
     @param baseUri The URL where the HTML was retrieved from. Used to resolve relative URLs to absolute URLs, that occur
     before the HTML declares a {@code } tag.
     @param parser alternate {@link Parser#xmlParser() parser} to use.
     @return sane HTML
     */
    public static Document parse(String html, String baseUri, Parser parser) {
        return parser.parseInput(html, baseUri);
    }

    /**
     Parse HTML into a Document. As no base URI is specified, absolute URL detection relies on the HTML including a
     {@code } tag.

     @param html HTML to parse
     @return sane HTML

     @see #parse(String, String)
     */
    public static Document parse(String html) {
        return Parser.parse(html, "");
    }

    /**
     Parse XML into a Document. The parser will make a sensible, balanced document tree out of any HTML.

     @param xml    XML to parse
     @param baseUri The URL where the HTML was retrieved from. Used to resolve relative URLs to absolute URLs, that occur
     before the HTML declares a {@code } tag.
     @return sane XML
     */
    public static Document parseXML(String xml, String baseUri) {
        return Parser.parseXml(xml, baseUri);
    }

    /**
     Parse XML into a Document. The parser will make a sensible, balanced document tree out of any HTML.

     @param xml    XML to parse
     @return sane XML
     */
    public static Document parseXML(String xml) {
        return Parser.parseXml(xml, "");
    }

    /**
     Parse XML into a Document. The parser will make a sensible, balanced document tree out of any HTML.

     @param in          input stream to read. Make sure to close it after parsing.
     @param charsetName (optional) character set of file contents. Set to {@code null} to determine from {@code http-equiv} meta tag, if
     present, or fall back to {@code UTF-8} (which is often safe to do).
     @param baseUri     The URL where the HTML was retrieved from, to resolve relative links against.
     @throws IOException if the file could not be found, or read, or if the charsetName is invalid.
     @return sane XML
     */
    public static Document parseXML(InputStream in, String charsetName, String baseUri) throws IOException {
        return parse(in, charsetName, baseUri, Parser.xmlParser());
    }

    /**
     Parse XML into a Document. The parser will make a sensible, balanced document tree out of any HTML.

     @param in          input stream to read. Make sure to close it after parsing.
     @param charsetName (optional) character set of file contents. Set to {@code null} to determine from {@code http-equiv} meta tag, if
     present, or fall back to {@code UTF-8} (which is often safe to do).
     @throws IOException if the file could not be found, or read, or if the charsetName is invalid.
     @return sane XML
     */
    public static Document parseXML(InputStream in, String charsetName) throws IOException {
        return parseXML(in, charsetName, "");
    }

    /**
     Parse the contents of a file as HTML.

     @param in          file to load HTML from
     @param charsetName (optional) character set of file contents. Set to {@code null} to determine from {@code http-equiv} meta tag, if
     present, or fall back to {@code UTF-8} (which is often safe to do).
     @param baseUri     The URL where the HTML was retrieved from, to resolve relative links against.
     @return sane HTML

     @throws IOException if the file could not be found, or read, or if the charsetName is invalid.
     */
    public static Document parse(File in, String charsetName, String baseUri) throws IOException {
        return DataUtil.load(in, charsetName, baseUri);
    }

    /**
     Parse the contents of a file as HTML. The location of the file is used as the base URI to qualify relative URLs.

     @param in          file to load HTML from
     @param charsetName (optional) character set of file contents. Set to {@code null} to determine from {@code http-equiv} meta tag, if
     present, or fall back to {@code UTF-8} (which is often safe to do).
     @return sane HTML

     @throws IOException if the file could not be found, or read, or if the charsetName is invalid.
     @see #parse(File, String, String)
     */
    public static Document parse(File in, String charsetName) throws IOException {
        return DataUtil.load(in, charsetName, in.getAbsolutePath());
    }

     /**
     Read an input stream, and parse it to a Document.

     @param in          input stream to read. Make sure to close it after parsing.
     @param charsetName (optional) character set of file contents. Set to {@code null} to determine from {@code http-equiv} meta tag, if
     present, or fall back to {@code UTF-8} (which is often safe to do).
     @param baseUri     The URL where the HTML was retrieved from, to resolve relative links against.
     @return sane HTML

     @throws IOException if the file could not be found, or read, or if the charsetName is invalid.
     */
    public static Document parse(InputStream in, String charsetName, String baseUri) throws IOException {
        return DataUtil.load(in, charsetName, baseUri);
    }

    /**
     Read an input stream, and parse it to a Document. You can provide an alternate parser, such as a simple XML
     (non-HTML) parser.

     @param in          input stream to read. Make sure to close it after parsing.
     @param charsetName (optional) character set of file contents. Set to {@code null} to determine from {@code http-equiv} meta tag, if
     present, or fall back to {@code UTF-8} (which is often safe to do).
     @param baseUri     The URL where the HTML was retrieved from, to resolve relative links against.
     @param parser alternate {@link Parser#xmlParser() parser} to use.
     @return sane HTML

     @throws IOException if the file could not be found, or read, or if the charsetName is invalid.
     */
    public static Document parse(InputStream in, String charsetName, String baseUri, Parser parser) throws IOException {
        return DataUtil.load(in, charsetName, baseUri, parser);
    }

    /**
     Parse a fragment of HTML, with the assumption that it forms the {@code body} of the HTML.

     @param bodyHtml body HTML fragment
     @param baseUri  URL to resolve relative URLs against.
     @return sane HTML document

     @see Document#body()
     */
    public static Document parseBodyFragment(String bodyHtml, String baseUri) {
        return Parser.parseBodyFragment(bodyHtml, baseUri);
    }

    /**
     Parse a fragment of HTML, with the assumption that it forms the {@code body} of the HTML.

     @param bodyHtml body HTML fragment
     @return sane HTML document

     @see Document#body()
     */
    public static Document parseBodyFragment(String bodyHtml) {
        return Parser.parseBodyFragment(bodyHtml, "");
    }

    /**
     Get safe HTML from untrusted input HTML, by parsing input HTML and filtering it through a white-list of permitted
     tags and attributes.

     @param bodyHtml  input untrusted HTML (body fragment)
     @param baseUri   URL to resolve relative URLs against
     @param whitelist white-list of permitted HTML elements
     @return safe HTML (body fragment)

     @see Cleaner#clean(Document)
     */
    public static String clean(String bodyHtml, String baseUri, Whitelist whitelist) {
        Document dirty = parseBodyFragment(bodyHtml, baseUri);
        Cleaner cleaner = new Cleaner(whitelist);
        Document clean = cleaner.clean(dirty);
        return clean.body().html();
    }

    /**
     Get safe HTML from untrusted input HTML, by parsing input HTML and filtering it through a white-list of permitted
     tags and attributes.

     @param bodyHtml  input untrusted HTML (body fragment)
     @param whitelist white-list of permitted HTML elements
     @return safe HTML (body fragment)

     @see Cleaner#clean(Document)
     */
    public static String clean(String bodyHtml, Whitelist whitelist) {
        return clean(bodyHtml, "", whitelist);
    }

    /**
     * Get safe HTML from untrusted input HTML, by parsing input HTML and filtering it through a white-list of
     * permitted
     * tags and attributes.
     *
     * @param bodyHtml input untrusted HTML (body fragment)
     * @param baseUri URL to resolve relative URLs against
     * @param whitelist white-list of permitted HTML elements
     * @param outputSettings document output settings; use to control pretty-printing and entity escape modes
     * @return safe HTML (body fragment)
     * @see Cleaner#clean(Document)
     */
    public static String clean(String bodyHtml, String baseUri, Whitelist whitelist, Document.OutputSettings outputSettings) {
        Document dirty = parseBodyFragment(bodyHtml, baseUri);
        Cleaner cleaner = new Cleaner(whitelist);
        Document clean = cleaner.clean(dirty);
        clean.outputSettings(outputSettings);
        return clean.body().html();
    }

    /**
     Test if the input HTML has only tags and attributes allowed by the Whitelist. Useful for form validation. The input HTML should
     still be run through the cleaner to set up enforced attributes, and to tidy the output.
     @param bodyHtml HTML to test
     @param whitelist whitelist to test against
     @return true if no tags or attributes were removed; false otherwise
     @see #clean(String, Whitelist)
     */
    public static boolean isValid(String bodyHtml, Whitelist whitelist) {
        Document dirty = parseBodyFragment(bodyHtml, "");
        Cleaner cleaner = new Cleaner(whitelist);
        return cleaner.isValid(dirty);
    }
    
}