kardolus commented on code in PR #914:
URL: https://github.com/apache/knox/pull/914#discussion_r1626291577
##########
gateway-server/src/main/java/org/apache/knox/gateway/GatewayServlet.java:
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@@ -277,4 +278,34 @@ public Enumeration<String> getInitParameterNames() {
return config.getInitParameterNames();
}
}
+
+ private Exception sanitizeException(Exception e) {
+ if (e == null || e.getMessage() == null) {
+ return e;
+ }
+ if (!isErrorMessageSanitizationEnabled || e.getMessage() == null) {
+ return e;
+ }
+ String sanitizedMessage =
e.getMessage().replaceAll("\\b(?:\\d{1,3}\\.){3}\\d{1,3}\\b", "[hidden]");
+ return createNewException(e, sanitizedMessage);
+ }
+
+ private <T extends Exception> T createNewException(T e, String
sanitizedMessage) {
+ try {
+ Constructor<? extends Exception> constructor =
e.getClass().getConstructor(String.class, Throwable.class);
+ T sanitizedException = (T) constructor.newInstance(sanitizedMessage,
e.getCause());
+ sanitizedException.setStackTrace(e.getStackTrace());
+ return sanitizedException;
+ } catch (Exception ex) {
+ Exception genericException = new Exception(sanitizedMessage,
e.getCause());
+ genericException.setStackTrace(e.getStackTrace());
+ return (T) genericException;
+ }
+ }
+
+ private <T extends Exception> T sanitizeAndRethrow(Exception e) throws T {
+ Exception sanitizedException = sanitizeException(e);
+ LOG.failedToExecuteFilter(sanitizedException);
+ throw (T) sanitizedException;
Review Comment:
@pzampino I chose this approach because, unlike returning an exception,
which requires upstream code to handle the `Exception` type, throwing it
directly takes advantage of Java's compiler to manage error handling, avoiding
the need for callers to explicitly deal with broad `Exception` handling.
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