public MediaType detect(InputStream input, Metadata metadata) throws IOException {
// Check if we have access to the document
if (input == null) {
return MediaType.OCTET_STREAM;
}
// If this is a TikaInputStream wrapping an already
// parsed NPOIFileSystem/DirectoryNode, just get the
// names from the root:
TikaInputStream tis = TikaInputStream.cast(input);
Set<String> names = null;
if (tis != null) {
Object container = tis.getOpenContainer();
if (container instanceof NPOIFSFileSystem) {
names = getTopLevelNames(((NPOIFSFileSystem) container).getRoot());
} else if (container instanceof DirectoryNode) {
names = getTopLevelNames((DirectoryNode) container);
}
}
if (names == null) {
// Check if the document starts with the OLE header
input.mark(8);
try {
if (input.read() != 0xd0
|| input.read() != 0xcf
|| input.read() != 0x11
|| input.read() != 0xe0
|| input.read() != 0xa1
|| input.read() != 0xb1
|| input.read() != 0x1a
|| input.read() != 0xe1) {
return MediaType.OCTET_STREAM;
}
} finally {
input.reset();
}
}
// We can only detect the exact type when given a TikaInputStream
if (names == null && tis != null) {
// Look for known top level entry names to detect the document type
names = getTopLevelNames(tis);
}
// Detect based on the names (as available)
if (tis != null
&& tis.getOpenContainer() != null
&& tis.getOpenContainer() instanceof NPOIFSFileSystem) {
return detect(names, ((NPOIFSFileSystem) tis.getOpenContainer()).getRoot());
} else {
return detect(names, null);
}
}
public void parseEmbedded(
InputStream inputStream,
ContentHandler contentHandler,
Metadata metadata,
boolean outputHtml)
throws SAXException, IOException {
String name = metadata.get(Metadata.RESOURCE_NAME_KEY);
if (name == null) {
name = "file" + count++;
}
MediaType contentType = detector.detect(inputStream, metadata);
if (name.indexOf('.') == -1 && contentType != null) {
try {
name += config.getMimeRepository().forName(contentType.toString()).getExtension();
} catch (MimeTypeException e) {
e.printStackTrace();
}
}
String relID = metadata.get(Metadata.EMBEDDED_RELATIONSHIP_ID);
if (relID != null && !name.startsWith(relID)) {
name = relID + "_" + name;
}
File outputFile = new File(extractDir, name);
File parent = outputFile.getParentFile();
if (!parent.exists()) {
if (!parent.mkdirs()) {
throw new IOException("unable to create directory \"" + parent + "\"");
}
}
System.out.println("Extracting '" + name + "' (" + contentType + ") to " + outputFile);
FileOutputStream os = null;
try {
os = new FileOutputStream(outputFile);
if (inputStream instanceof TikaInputStream) {
TikaInputStream tin = (TikaInputStream) inputStream;
if (tin.getOpenContainer() != null && tin.getOpenContainer() instanceof DirectoryEntry) {
POIFSFileSystem fs = new POIFSFileSystem();
copy((DirectoryEntry) tin.getOpenContainer(), fs.getRoot());
fs.writeFilesystem(os);
} else {
IOUtils.copy(inputStream, os);
}
} else {
IOUtils.copy(inputStream, os);
}
} catch (Exception e) {
logger.warn("Ignoring unexpected exception trying to save embedded file " + name, e);
} finally {
if (os != null) {
os.close();
}
}
}