/**
* Returns true if the content type of the resource pointed by sourceString is an image.
*
* @param sourceString the original image link.
* @return true if the content type of the resource pointed by sourceString is an image.
*/
@Override
public boolean isDirectImage(String sourceString) {
boolean isDirectImage = false;
try {
URL url = new URL(sourceString);
String protocol = url.getProtocol();
if (protocol.equals("http") || protocol.equals("https")) {
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
isDirectImage = connection.getContentType().contains("image");
connection.disconnect();
} else if (protocol.equals("ftp")) {
if (sourceString.endsWith(".png")
|| sourceString.endsWith(".jpg")
|| sourceString.endsWith(".gif")) {
isDirectImage = true;
}
}
} catch (Exception e) {
logger.debug("Failed to retrieve content type information for" + sourceString, e);
}
return isDirectImage;
}
