in struts2-secure-jakarta-stream-multipart-parser-plugin/src/main/java/org/apache/struts/extras/SecureJakartaStreamMultiPartRequest.java [523:532]
private String getCanonicalName(String fileName) {
int forwardSlash = fileName.lastIndexOf("/");
int backwardSlash = fileName.lastIndexOf("\\");
if (forwardSlash != -1 && forwardSlash > backwardSlash) {
fileName = fileName.substring(forwardSlash + 1, fileName.length());
} else {
fileName = fileName.substring(backwardSlash + 1, fileName.length());
}
return fileName;
}