org.xmlactions.common.text.Html.java Source code

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Here is the source code for org.xmlactions.common.text.Html.java

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/*
 * Copyright (C) Mike Murphy 2003-2015 <mike.murphy@xmlactions.org><mwjmurphy@gmail.com>
 *
 * 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 org.xmlactions.common.text;

import org.apache.commons.lang.StringUtils;

public class Html {

    /** Content Types that we may return to browser.  These are set in the HttpPager class */
    public final static String CONTENT_TYPE_KEY = "content_type", CONTENT_TYPE_HTML = "text/html;charset=UTF-8",
            CONTENT_TYPE_XML = "text/xml;charset=UTF-8", CONTENT_TYPE_JSON = "application/json;charset=UTF-8";

    private String contentType = null;

    /**
     * This will remove the html element from a page. The inner content of the html element is returned.
     * 
     * If no html start and end is found then the page us untouched.
     * 
     * @param page
     * @return the inner content of the html element.
     */
    public static String removeOuterHtml(String page) {
        String startHtmlPattern = "<html";
        String endHtmlPattern = "</html>";
        String html = page.toLowerCase();
        int startHtmlIndex = html.indexOf(startHtmlPattern);
        if (startHtmlIndex >= 0) {
            int indexFrom = page.indexOf('>', startHtmlIndex);
            if (indexFrom >= 0) {
                int indexTo = html.lastIndexOf(endHtmlPattern);
                if (indexTo >= 0) {
                    page = page.substring(indexFrom + 1, indexTo);
                }
            }
        }
        return page;
    }

    /**
     * This will remove the json or xml element from a page. The inner content of the json or xml element is returned.
     * 
     * If it removes a json or xml element then it will set the content type to reflect the file mime type.
     * 
     * If no json/xml start and end is found then the page is untouched.
     * 
     * @param page
     * @return the inner content of the json/xml element.
     */
    public String removeOuterJsonOrXml(String page) {
        return _removeOuterJsonOrXml(page);
    }

    /**
     * This will remove the json or xml element from a page. The inner content of the json or xml or html element is returned.
     * 
     * If it removes a json or xml element then it will set the content type to reflect the file mime type.
     * 
     * If no json/xml start and end is found then the page is untouched.
     * 
     * @param page
     * @return the inner content of the json/xml element.
     */
    private String _removeOuterJsonOrXml(String page) {
        String startJsonPattern = "<json";
        String endJsonPattern = "</json>";
        String startXmlPattern = "<xml";
        String endXmlPattern = "</xml>";
        String html = page.toLowerCase();
        int startIndex = html.indexOf(startJsonPattern);
        if (startIndex >= 0) {
            int indexFrom = page.indexOf('>', startIndex);
            if (indexFrom >= 0) {
                int indexTo = html.lastIndexOf(endJsonPattern);
                if (indexTo >= 0) {
                    if (page.length() > indexTo) {
                        if (StringUtils.isWhitespace(page.substring(indexTo + endJsonPattern.length()))) {
                            page = page.substring(indexFrom + 1, indexTo);
                            setContentType(CONTENT_TYPE_JSON);
                        }
                    } else {
                        page = page.substring(indexFrom + 1, indexTo);
                        setContentType(CONTENT_TYPE_JSON);
                    }
                }
            }
        } else {
            startIndex = html.indexOf(startXmlPattern);
            if (startIndex >= 0) {
                int indexFrom = page.indexOf('>', startIndex);
                if (indexFrom >= 0) {
                    int indexTo = html.lastIndexOf(endXmlPattern);
                    if (indexTo >= 0) {
                        if (page.length() > indexTo) {
                            if (StringUtils.isWhitespace(page.substring(indexTo + endXmlPattern.length()))) {
                                page = page.substring(indexFrom + 1, indexTo);
                                setContentType(CONTENT_TYPE_XML);
                            }
                        } else {
                            page = page.substring(indexFrom + 1, indexTo);
                            setContentType(CONTENT_TYPE_XML);
                        }
                    }
                }
            }
        }
        return page;
    }

    /**
     * This will remove the json or xml or html element from a page. The inner content of the json or xml or html element is returned.
     * 
     * If it removes a json or xml element then it will set the content type to reflect the file mime type.
     * 
     * If no json/xml/html start and end is found then the page is untouched.
     * 
     * @param page
     * @return the inner content of the json/xml/html element.
     */
    public String removeOuterJsonOrXmlOrHtml(String page) {
        String startJsonPattern = "<json";
        String endJsonPattern = "</json>";
        String startXmlPattern = "<xml";
        String endXmlPattern = "</xml>";
        String startHtmlPattern = "<html";
        String endHtmlPattern = "</html>";
        String html = page.toLowerCase();
        int startIndex = html.indexOf(startJsonPattern);
        if (startIndex >= 0) {
            int indexFrom = page.indexOf('>', startIndex);
            if (indexFrom >= 0) {
                int indexTo = html.lastIndexOf(endJsonPattern);
                if (indexTo >= 0) {
                    if (page.length() > indexTo) {
                        if (StringUtils.isWhitespace(page.substring(indexTo + endJsonPattern.length()))) {
                            page = page.substring(indexFrom + 1, indexTo);
                            setContentType(CONTENT_TYPE_JSON);
                        }
                    } else {
                        page = page.substring(indexFrom + 1, indexTo);
                        setContentType(CONTENT_TYPE_JSON);
                    }
                }
            }
        } else {
            startIndex = html.indexOf(startXmlPattern);
            if (startIndex >= 0) {
                int indexFrom = page.indexOf('>', startIndex);
                if (indexFrom >= 0) {
                    int indexTo = html.lastIndexOf(endXmlPattern);
                    if (indexTo >= 0) {
                        if (page.length() > indexTo) {
                            if (StringUtils.isWhitespace(page.substring(indexTo + endXmlPattern.length()))) {
                                page = page.substring(indexFrom + 1, indexTo);
                                setContentType(CONTENT_TYPE_XML);
                            }
                        } else {
                            page = page.substring(indexFrom + 1, indexTo);
                            setContentType(CONTENT_TYPE_XML);
                        }
                    }
                }
            } else {
                startIndex = html.indexOf(startHtmlPattern);
                if (startIndex >= 0) {
                    int indexFrom = page.indexOf('>', startIndex);
                    if (indexFrom >= 0) {
                        int indexTo = html.lastIndexOf(endHtmlPattern);
                        if (indexTo >= 0) {
                            if (page.length() > indexTo) {
                                if (StringUtils.isWhitespace(page.substring(indexTo + endHtmlPattern.length()))) {
                                    page = page.substring(indexFrom + 1, indexTo);
                                    //setContentType(CONTENT_TYPE_HTML);
                                }
                            } else {
                                page = page.substring(indexFrom + 1, indexTo);
                                //setContentType(CONTENT_TYPE_HTML);
                            }
                        }
                    }
                }

            }
        }
        return page;
    }

    public String getContentType() {
        return contentType;
    }

    public void setContentType(String contentType) {
        this.contentType = contentType;
    }

}