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https://issues.apache.org/jira/browse/KAFKA-14794?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
José Armando García Sancio resolved KAFKA-14794.
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Fix Version/s: 3.5.0
Resolution: Fixed
> Unable to deserialize base64 JSON strings
> ------------------------------------------
>
> Key: KAFKA-14794
> URL: https://issues.apache.org/jira/browse/KAFKA-14794
> Project: Kafka
> Issue Type: Bug
> Reporter: José Armando García Sancio
> Assignee: José Armando García Sancio
> Priority: Major
> Fix For: 3.5.0
>
>
> h1. Problem
> The following test fails:
> {code:java}
> @Test
> public void testBinaryNode() throws IOException {
> byte[] expected = new byte[] {5, 2, 9, 4, 1, 8, 7, 0, 3, 6};
> StringWriter writer = new StringWriter();
> ObjectMapper mapper = new ObjectMapper();
> mapper.writeTree(mapper.createGenerator(writer), new
> BinaryNode(expected));
> JsonNode binaryNode = mapper.readTree(writer.toString());
> assertTrue(binaryNode.isTextual(), binaryNode.toString());
> byte[] actual = MessageUtil.jsonNodeToBinary(binaryNode, "Test base64
> JSON string");
> assertEquals(expected, actual);
> }
> {code}
> with the following error:
> {code:java}
> Gradle Test Run :clients:test > Gradle Test Executor 20 > MessageUtilTest >
> testBinaryNode() FAILED
> java.lang.RuntimeException: Test base64 JSON string: expected
> Base64-encoded binary data.
> at
> org.apache.kafka.common.protocol.MessageUtil.jsonNodeToBinary(MessageUtil.java:165)
> at
> org.apache.kafka.common.protocol.MessageUtilTest.testBinaryNode(MessageUtilTest.java:102)
> {code}
> The reason for the failure is because FasterXML Jackson deserializes base64
> JSON strings to a TextNode not to a BinaryNode.
> h1. Solution
> The method {{MessageUtil::jsonNodeToBinary}} should not assume that the input
> {{JsonNode}} is always a {{{}BinaryNode{}}}. It should also support decoding
> {{{}TextNode{}}}.
> {{JsonNode::binaryValue}} is supported by both {{BinaryNode}} and
> {{{}TextNode{}}}.
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