Java HTML Parse Jsoup getErrorMessage(String htmlStr)

Description

We need to show custom error message returned from the configuration management system.

License

Open Source License

Parameter

Parameter	Description
htmlStr	a parameter

Return

converted string

Declaration

public static String getErrorMessage(String htmlStr) 

Method Source Code

//package com.java2s;
/**/*from   w w w.j a v  a  2 s.c  o m*/
 * Copyright 2014 Comcast Cable Communications Management, LLC
 *
 * This file is part of CATS.
 *
 * CATS is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * CATS 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with CATS.  If not, see <http://www.gnu.org/licenses/>.
 */

import org.jsoup.Jsoup;

public class Main {
    private static final String HTTP_ERROR_MSG_START_OFFSET = " - ";
    private static final String HTTP_ERROR_MSG_END_OFFSET = " type Status report message";

    /**
     * We need to show custom error message returned from the configuration
     * management system. As it returns standard error codes only in response
     * header, we need to parse the response body to read the exact cause of the
     * error. Again the response body will contain the error message 3 times and
     * we need it only once. So I added one stupid subString logic to extract
     * that.
     * 
     * @param htmlStr
     * @return converted string
     */
    public static String getErrorMessage(String htmlStr) {
        String errorMsg = html2text(htmlStr);
        errorMsg = errorMsg.substring(
                errorMsg.indexOf(HTTP_ERROR_MSG_START_OFFSET) + HTTP_ERROR_MSG_START_OFFSET.length(),
                errorMsg.indexOf(HTTP_ERROR_MSG_END_OFFSET));
        return errorMsg;
    }

    /**
     * Converts html content to text.
     * 
     * @param htmlStr
     * @return converted string
     */
    public static String html2text(String htmlStr) {
        if ((null == htmlStr) || (htmlStr.isEmpty())) {
            throw new IllegalArgumentException("The input html string was null or empty");
        }
        return Jsoup.parse(htmlStr).text();
    }
}

Related

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2. getDoc(File file)
3. getDoc(String path)
4. getDoc(String url)
5. getDoctypeName(InputStream s)
6. getExplanation(String html)
7. getFirstImageSrc(String html)
8. getFirstSentence(final String html)
9. getFirstTableFromHTML(String result)