/**
* Test whether an XPath is valid. It seems the Xalan has no easy way to check, so this creates a
* dummy test document, then tries to evaluate the xpath against it.
*
* @param xpathString XPath String to validate
* @param showDialog weather to show a dialog
* @return returns true if valid, valse otherwise.
*/
public static boolean validXPath(String xpathString, boolean showDialog) {
String ret = null;
boolean success = true;
Document testDoc = null;
try {
testDoc = XPathUtil.makeDocumentBuilder(false, false, false, false).newDocument();
Element el = testDoc.createElement("root"); // $NON-NLS-1$
testDoc.appendChild(el);
XPathUtil.validateXPath(testDoc, xpathString);
} catch (IllegalArgumentException e) {
log.warn(e.getLocalizedMessage());
success = false;
ret = e.getLocalizedMessage();
} catch (ParserConfigurationException e) {
success = false;
ret = e.getLocalizedMessage();
} catch (TransformerException e) {
success = false;
ret = e.getLocalizedMessage();
}
if (showDialog) {
JOptionPane.showMessageDialog(
null,
(success) ? JMeterUtils.getResString("xpath_assertion_valid") : ret, // $NON-NLS-1$
(success)
? JMeterUtils.getResString("xpath_assertion_valid")
: JMeterUtils //$NON-NLS-1$
.getResString("xpath_assertion_failed"),
(success)
? JOptionPane.INFORMATION_MESSAGE // $NON-NLS-1$
: JOptionPane.ERROR_MESSAGE);
}
return success;
}
/**
* Converts (X)HTML response to DOM object Tree. This version cares of charset of response.
*
* @param unicodeData
* @return
*/
private Document parseResponse(String unicodeData, XPathExtractor extractor)
throws UnsupportedEncodingException, IOException, ParserConfigurationException, SAXException,
TidyException {
// TODO: validate contentType for reasonable types?
// NOTE: responseData encoding is server specific
// Therefore we do byte -> unicode -> byte conversion
// to ensure UTF-8 encoding as required by XPathUtil
// convert unicode String -> UTF-8 bytes
byte[] utf8data = unicodeData.getBytes("UTF-8"); // $NON-NLS-1$
ByteArrayInputStream in = new ByteArrayInputStream(utf8data);
boolean isXML = JOrphanUtils.isXML(utf8data);
// this method assumes UTF-8 input data
return XPathUtil.makeDocument(
in,
false,
false,
extractor.useNameSpace(),
extractor.isTolerant(),
extractor.isQuiet(),
extractor.showWarnings(),
extractor.reportErrors(),
isXML,
extractor.isDownloadDTDs());
}
private String process(String textToParse, XPathExtractor extractor) {
try {
Document doc = parseResponse(textToParse, extractor);
List<String> matchStrings = new ArrayList<String>();
XPathUtil.putValuesForXPathInList(
doc, xpathExpressionField.getText(), matchStrings, extractor.getFragment());
StringBuilder builder = new StringBuilder();
int nbFound = matchStrings.size();
builder.append("Match count: ").append(nbFound).append("\n");
for (int i = 0; i < nbFound; i++) {
builder
.append("Match[")
.append(i + 1)
.append("]=")
.append(matchStrings.get(i))
.append("\n");
}
return builder.toString();
} catch (Exception e) {
return "Exception:" + ExceptionUtils.getStackTrace(e);
}
}
