public String getContentType(InputStream inputStream, String fileName) {
String contentType = getContentType(fileName);
if (!contentType.equals(ContentTypes.APPLICATION_OCTET_STREAM)) {
return contentType;
}
List<MimeType> mimeTypes = new ArrayList<MimeType>(MimeUtil.getMimeTypes(inputStream));
MimeType mimeType = mimeTypes.get(0);
if ((mimeTypes.size() > 1) && (mimeType instanceof TextMimeType)) {
mimeType = mimeTypes.get(1);
}
contentType = mimeType.getMediaType() + StringPool.SLASH + mimeType.getSubType();
if (contentType.equals(ContentTypes.APPLICATION_OCTET_STREAM)) {
contentType = getContentType(fileName);
} else if (contentType.equals(ContentTypes.APPLICATION_ZIP)) {
String contentTypeByFileName = getContentType(fileName);
if (contentTypeByFileName.contains("vnd.openxmlformats")) {
contentType = contentTypeByFileName;
}
}
if (_log.isDebugEnabled()) {
_log.debug("Content type " + contentType + " returned for " + fileName);
}
return contentType;
}
@SuppressWarnings("unchecked")
@Override
public String probeContentType(Path path) throws IOException {
Collection<MimeType> mimeTypes = mimeUtil.getMimeTypes(path.toUri().toURL());
if (null == mimeTypes || mimeTypes.size() <= 0) {
return null;
}
MimeType mimeType = mimeTypes.iterator().next();
return String.format("%s/%s", mimeType.getMediaType(), mimeType.getSubType());
}
