From d116828d13692b9c32c26cebc3881aa9e90f1fa3 Mon Sep 17 00:00:00 2001
From: Sondre Larsen Ovrid <sondre.larsen.ovrid@nav.no>
Date: Sun, 15 Oct 2023 15:33:48 +0200
Subject: [PATCH] Logg infomelding dersom path/querystring matcher fnr-regex

---
 .../config/FnrUsageLoggerInterceptor.java     | 40 +++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 src/main/java/no/nav/veilarbperson/config/FnrUsageLoggerInterceptor.java

diff --git a/src/main/java/no/nav/veilarbperson/config/FnrUsageLoggerInterceptor.java b/src/main/java/no/nav/veilarbperson/config/FnrUsageLoggerInterceptor.java
new file mode 100644
index 00000000..b92e3b16
--- /dev/null
+++ b/src/main/java/no/nav/veilarbperson/config/FnrUsageLoggerInterceptor.java
@@ -0,0 +1,40 @@
+package no.nav.veilarbperson.config;
+
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import lombok.extern.slf4j.Slf4j;
+import no.nav.common.utils.StringUtils;
+import org.jetbrains.annotations.NotNull;
+import org.slf4j.MDC;
+import org.springframework.stereotype.Component;
+import org.springframework.web.servlet.HandlerInterceptor;
+
+import java.util.Optional;
+
+@Slf4j
+@Component
+public class FnrUsageLoggerInterceptor implements HandlerInterceptor {
+
+    private static final String NAV_CONSUMER_ID_HEADER_NAME = "Nav-Consumer-Id";
+    private static final String MDC_ENDPOINT_KEY = "endpoint";
+
+    @Override
+    public boolean preHandle(@NotNull HttpServletRequest request, @NotNull HttpServletResponse response, @NotNull Object handler) {
+        String requestURI = request.getRequestURI();
+        String queryString = request.getQueryString();
+        String fnrPattern = "\\d{11}";
+
+        boolean hasFnrInRequestURI = StringUtils.notNullOrEmpty(requestURI) && requestURI.matches(fnrPattern);
+        boolean hasFnrInQueryString = StringUtils.notNullOrEmpty(queryString) && requestURI.matches(fnrPattern);
+
+        if (hasFnrInRequestURI || hasFnrInQueryString) {
+            String consumerId = Optional.ofNullable(request.getHeader(NAV_CONSUMER_ID_HEADER_NAME)).orElse("unknown");
+
+            MDC.put(MDC_ENDPOINT_KEY, requestURI);
+            log.debug("Konsument {} forespurte endepunkt {} som matcher fnr-regex.", consumerId, requestURI);
+            MDC.remove(MDC_ENDPOINT_KEY);
+        }
+
+        return true;
+    }
+}