From 93c735c1122aeb336bd65bc45d6b14eaa980df06 Mon Sep 17 00:00:00 2001
From: Thomas <>
Date: Thu, 18 Nov 2021 15:03:28 +0100
Subject: add method to inject http headers into Apache HTTP-Client requests

---
 .../at/gv/egiz/eaaf/core/impl/http/HttpUtils.java     | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

(limited to 'eaaf_core_utils')

diff --git a/eaaf_core_utils/src/main/java/at/gv/egiz/eaaf/core/impl/http/HttpUtils.java b/eaaf_core_utils/src/main/java/at/gv/egiz/eaaf/core/impl/http/HttpUtils.java
index 3058c9b5..dd6f69ee 100644
--- a/eaaf_core_utils/src/main/java/at/gv/egiz/eaaf/core/impl/http/HttpUtils.java
+++ b/eaaf_core_utils/src/main/java/at/gv/egiz/eaaf/core/impl/http/HttpUtils.java
@@ -34,6 +34,7 @@ import javax.net.ssl.SSLContext;
 import javax.servlet.http.HttpServletRequest;
 
 import org.apache.commons.lang3.StringUtils;
+import org.apache.http.HttpRequest;
 import org.apache.http.HttpResponse;
 import org.apache.http.StatusLine;
 import org.apache.http.client.ClientProtocolException;
@@ -48,6 +49,7 @@ import at.gv.egiz.eaaf.core.exceptions.EaafConfigurationException;
 import at.gv.egiz.eaaf.core.exceptions.EaafFactoryException;
 import at.gv.egiz.eaaf.core.impl.data.Pair;
 import at.gv.egiz.eaaf.core.impl.data.Triple;
+import lombok.NonNull;
 import lombok.extern.slf4j.Slf4j;
 
 @Slf4j
@@ -183,6 +185,23 @@ public class HttpUtils {
     }
   }
 
+  /**
+   * Inject HTTP header into http request.
+   * 
+   * <p>The header is only set if HeaderValue is not null</p>
+   * 
+   * @param req Http request object
+   * @param headerName HeaderName
+   * @param headerValue HeaderValue
+   */
+  public static void addHeaderIfNotEmpty(@NonNull HttpRequest req, @NonNull String headerName, 
+      @Nullable String headerValue) {
+    if (StringUtils.isNotEmpty(headerValue)) {
+      req.addHeader(headerName, headerValue);
+
+    }
+  }
+  
   /**
    * Initialize a {@link SSLContext} with a {@link KeyStore} that uses X509 Client
    * authentication.
-- 
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