/**
* Used internally when a document can't be loaded--returns XHTML as an XMLResource indicating
* that fact.
*
* @param uri The URI which could not be loaded.
* @return An XMLResource containing XML which about the failure.
*/
private HTMLResource getNotFoundDocument(final String uri) {
HTMLResource xr;
// URI may contain & symbols which can "break" the XHTML we're creating
final String cleanUri = GeneralUtil.escapeHTML(uri);
final String notFound =
"<html><h1>Document not found</h1><p>Could not access URI <pre>"
+ cleanUri
+ "</pre></p></html>";
xr = HTMLResource.load(new StringReader(notFound));
return xr;
}
/** {@inheritDoc} */
public HTMLResource getXMLResource(String uri) {
uri = resolveURI(uri);
if (uri != null && uri.startsWith("file:")) {
File file = null;
try {
final StringBuffer sbURI = GeneralUtil.htmlEscapeSpace(uri);
LOGGER.info("Encoded URI: " + sbURI);
file = new File(new URI(sbURI.toString()));
} catch (final URISyntaxException e) {
LOGGER.error("Invalid file URI " + uri, e);
return getNotFoundDocument(uri);
}
if (file.isDirectory()) {
final String dirlist = DirectoryLister.list(file);
return HTMLResource.load(new StringReader(dirlist));
}
}
HTMLResource xr = null;
URLConnection uc = null;
InputStream inputStream = null;
try {
final StreamResource strm = new StreamResource(uri);
strm.connect();
uc = strm.getUrlConnection();
final String contentType = uc.getContentType();
LOGGER.info("Content-Type = " + contentType);
if (uc instanceof HttpURLConnection) {
LOGGER.info("Response Code = " + ((HttpURLConnection) uc).getResponseCode());
LOGGER.info("Response Message = " + ((HttpURLConnection) uc).getResponseMessage());
}
// Maybe should popup a choice when content/unknown!
if (contentType == null
|| contentType.equals("text/plain")
|| contentType.equals("content/unknown")) {
inputStream = strm.bufferedStream();
xr = HTMLResource.load(inputStream, uri);
} else if (contentType.startsWith("image")) {
final String doc = "<img src='" + uri + "'/>";
xr = HTMLResource.load(doc);
} else {
inputStream = strm.bufferedStream();
xr = HTMLResource.load(inputStream, uri);
}
} catch (final MalformedURLException e) {
LOGGER.error("bad URL given: " + uri, e);
} catch (final IOException e) {
LOGGER.error("IO problem for " + uri, e);
} finally {
if (inputStream != null) {
try {
inputStream.close();
} catch (final IOException e) {
// swallow
}
}
}
if (xr == null) {
xr = getNotFoundDocument(uri);
}
return xr;
}