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XLT (Xceptance LoadTest) is an extensive load and performance test tool developed and maintained by Xceptance.
/*
* Copyright (c) 2002-2021 Gargoyle Software Inc.
*
* 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
* https://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 com.gargoylesoftware.htmlunit;
import java.io.IOException;
import java.io.InputStream;
import java.io.Serializable;
import java.util.Locale;
import org.apache.commons.lang3.ArrayUtils;
import org.apache.commons.lang3.StringUtils;
import com.gargoylesoftware.htmlunit.html.DomElement;
import com.gargoylesoftware.htmlunit.html.Html;
import com.gargoylesoftware.htmlunit.html.HtmlPage;
import com.gargoylesoftware.htmlunit.html.XHtmlPage;
import com.gargoylesoftware.htmlunit.html.parser.HTMLParser;
import com.gargoylesoftware.htmlunit.html.parser.neko.HtmlUnitNekoHtmlParser;
import com.gargoylesoftware.htmlunit.util.MimeType;
import com.gargoylesoftware.htmlunit.xml.XmlPage;
/**
* The default implementation of {@link PageCreator}. Designed to be extended for easier handling of new content
* types. Just check the content type in createPage() and call super(createPage()) if your custom
* type isn't found. There are also protected createXXXXPage() methods for creating the {@link Page} types
* which HtmlUnit already knows about for your custom content types.
*
*
* The following table shows the type of {@link Page} created depending on the content type:
*
*
*
* Content type
* Type of page
*
*
* text/html
* text/javascript
* {@link HtmlPage}
*
*
* text/xml
* application/xml
* text/vnd.wap.wml
* *+xml
*
* {@link XmlPage}, or an {@link XHtmlPage} if an XHTML namespace is used
*
*
* text/*
* {@link TextPage}
*
*
* Anything else
* {@link UnexpectedPage}
*
*
*
* @author Mike Bowler
* @author Christian Sell
* @author Brad Clarke
* @author Marc Guillemot
* @author Ahmed Ashour
* @author Daniel Gredler
* @author Ronald Brill
*/
public class DefaultPageCreator implements PageCreator, Serializable {
private static final byte[] markerUTF8_ = {(byte) 0xef, (byte) 0xbb, (byte) 0xbf};
private static final byte[] markerUTF16BE_ = {(byte) 0xfe, (byte) 0xff};
private static final byte[] markerUTF16LE_ = {(byte) 0xff, (byte) 0xfe};
/**
* See http://tools.ietf.org/html/draft-abarth-mime-sniff-05
*/
private static final String[] htmlPatterns = {"!DOCTYPE HTML", "HTML", "HEAD", "SCRIPT",
"IFRAME", "H1", "DIV", "FONT", "TABLE", "A", "STYLE", "TITLE", "B", "BODY", "BR", "P", "!--" };
private static final HTMLParser htmlParser_ = new HtmlUnitNekoHtmlParser();
/**
* The different supported page types.
*/
public enum PageType {
/** html. */
HTML,
/** javascript. */
JAVASCRIPT,
/** xml. */
XML,
/** text. */
TEXT,
/** unknown. */
UNKNOWN
}
/**
* Determines the kind of page to create from the content type.
* @param contentType the content type to evaluate
* @return "xml", "html", "javascript", "text" or "unknown"
*/
public static PageType determinePageType(final String contentType) {
if (null == contentType) {
return PageType.UNKNOWN;
}
final String contentTypeLC = contentType.toLowerCase(Locale.ROOT);
switch (contentTypeLC) {
case MimeType.TEXT_HTML:
case "image/svg+xml":
return PageType.HTML;
case "text/javascript":
case "application/x-javascript":
case MimeType.APPLICATION_JAVASCRIPT:
return PageType.JAVASCRIPT;
case MimeType.TEXT_XML:
case "application/xml":
case "text/vnd.wap.wml":
return PageType.XML;
default:
if (contentTypeLC.endsWith("+xml")) {
return PageType.XML;
}
if (contentTypeLC.startsWith("text/")) {
return PageType.TEXT;
}
return PageType.UNKNOWN;
}
}
/**
* Determines the kind of page to create from the content type.
* @param webResponse the response to investigate
* @exception IOException if an IO problem occurs
* @return "xml", "html", "javascript", "text" or "unknown"
*/
public static PageType determinePageType(final WebResponse webResponse) throws IOException {
final String contentType = webResponse.getContentType();
if (!StringUtils.isEmpty(contentType)) {
return determinePageType(contentType);
}
// sniff - http://tools.ietf.org/html/draft-abarth-mime-sniff-05
try (InputStream contentAsStream = webResponse.getContentAsStream()) {
final byte[] bytes = read(contentAsStream, 512);
if (bytes.length == 0) {
return determinePageType(MimeType.TEXT_PLAIN);
}
if (startsWith(bytes, markerUTF8_) || startsWith(bytes, markerUTF16BE_)
|| startsWith(bytes, markerUTF16LE_)) {
return determinePageType(MimeType.TEXT_PLAIN);
}
if (isBinary(bytes)) {
return determinePageType(MimeType.APPLICATION_OCTET_STREAM);
}
final String asAsciiString = new String(bytes, "ASCII").trim().toUpperCase(Locale.ROOT);
for (final String htmlPattern : htmlPatterns) {
try {
if ('<' == asAsciiString.charAt(0)) {
if (asAsciiString.startsWith(htmlPattern, 1)) {
final char spaceOrBracket = asAsciiString.charAt(htmlPattern.length() + 1);
if (' ' == spaceOrBracket || '>' == spaceOrBracket) {
return determinePageType(MimeType.TEXT_HTML);
}
}
}
}
catch (final ArrayIndexOutOfBoundsException e) {
// ignore and try next
}
}
}
return determinePageType(MimeType.TEXT_PLAIN);
}
/**
* Creates an instance.
*/
public DefaultPageCreator() {
// Empty.
}
/**
* Create a Page object for the specified web response.
*
* @param webResponse the response from the server
* @param webWindow the window that this page will be loaded into
* @exception IOException if an IO problem occurs
* @return the new page object
*/
@Override
public Page createPage(final WebResponse webResponse, final WebWindow webWindow) throws IOException {
final PageType pageType = determinePageType(webResponse);
switch (pageType) {
case HTML:
return createHtmlPage(webResponse, webWindow);
case JAVASCRIPT:
return createHtmlPage(webResponse, webWindow);
case XML:
final SgmlPage sgmlPage = createXmlPage(webResponse, webWindow);
final DomElement doc = sgmlPage.getDocumentElement();
if (doc != null && Html.XHTML_NAMESPACE.equals(doc.getNamespaceURI())) {
return createXHtmlPage(webResponse, webWindow);
}
return sgmlPage;
case TEXT:
return createTextPage(webResponse, webWindow);
default:
return createUnexpectedPage(webResponse, webWindow);
}
}
/**
* {@inheritDoc}
*/
@Override
public HTMLParser getHtmlParser() {
return htmlParser_;
}
/**
* See http://tools.ietf.org/html/draft-abarth-mime-sniff-05#section-4
* @param bytes the bytes to check
*/
private static boolean isBinary(final byte[] bytes) {
for (final byte b : bytes) {
if (b < 0x08
|| b == 0x0B
|| (b >= 0x0E && b <= 0x1A)
|| (b >= 0x1C && b <= 0x1F)) {
return true;
}
}
return false;
}
private static boolean startsWith(final byte[] bytes, final byte[] lookFor) {
if (bytes.length < lookFor.length) {
return false;
}
for (int i = 0; i < lookFor.length; i++) {
if (bytes[i] != lookFor[i]) {
return false;
}
}
return true;
}
private static byte[] read(final InputStream stream, final int maxNb) throws IOException {
final byte[] buffer = new byte[maxNb];
final int nbRead = stream.read(buffer);
if (nbRead == buffer.length) {
return buffer;
}
return ArrayUtils.subarray(buffer, 0, nbRead);
}
/**
* Creates an HtmlPage for this WebResponse.
*
* @param webResponse the page's source
* @param webWindow the WebWindow to place the HtmlPage in
* @return the newly created HtmlPage
* @throws IOException if the page could not be created
*/
protected HtmlPage createHtmlPage(final WebResponse webResponse, final WebWindow webWindow) throws IOException {
final HtmlPage page = new HtmlPage(webResponse, webWindow);
webWindow.setEnclosedPage(page);
htmlParser_.parse(webResponse, page, false);
return page;
}
/**
* Creates an XHtmlPage for this WebResponse.
*
* @param webResponse the page's source
* @param webWindow the WebWindow to place the HtmlPage in
* @return the newly created XHtmlPage
* @throws IOException if the page could not be created
*/
protected XHtmlPage createXHtmlPage(final WebResponse webResponse, final WebWindow webWindow) throws IOException {
final XHtmlPage page = new XHtmlPage(webResponse, webWindow);
webWindow.setEnclosedPage(page);
htmlParser_.parse(webResponse, page, true);
return page;
}
/**
* Creates a TextPage for this WebResponse.
*
* @param webResponse the page's source
* @param webWindow the WebWindow to place the TextPage in
* @return the newly created TextPage
*/
protected TextPage createTextPage(final WebResponse webResponse, final WebWindow webWindow) {
final TextPage newPage = new TextPage(webResponse, webWindow);
webWindow.setEnclosedPage(newPage);
return newPage;
}
/**
* Creates an UnexpectedPage for this WebResponse.
*
* @param webResponse the page's source
* @param webWindow the WebWindow to place the UnexpectedPage in
* @return the newly created UnexpectedPage
*/
protected UnexpectedPage createUnexpectedPage(final WebResponse webResponse, final WebWindow webWindow) {
final UnexpectedPage newPage = new UnexpectedPage(webResponse, webWindow);
webWindow.setEnclosedPage(newPage);
return newPage;
}
/**
* Creates an SgmlPage for this WebResponse.
*
* @param webResponse the page's source
* @param webWindow the WebWindow to place the TextPage in
* @return the newly created TextPage
* @throws IOException if the page could not be created
*/
protected SgmlPage createXmlPage(final WebResponse webResponse, final WebWindow webWindow) throws IOException {
final SgmlPage page = new XmlPage(webResponse, webWindow);
webWindow.setEnclosedPage(page);
return page;
}
}