Github user trixpan commented on a diff in the pull request: https://github.com/apache/nifi/pull/1462#discussion_r99038321 --- Diff: nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/GetHTTP.java --- @@ -467,6 +486,18 @@ public void onTrigger(final ProcessContext context, final ProcessSessionFactory if (accept != null) { get.addHeader(HEADER_ACCEPT, accept); } + + // Add dynamic headers + + PropertyValue customHeaderValue; + for (PropertyDescriptor customProperty : customHeaders) { + customHeaderValue = context.getProperty(customProperty).evaluateAttributeExpressions(); --- End diff -- I considered that but refrained from it due to: https://github.com/apache/nifi/blob/master/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/GetHTTP.java#L99
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