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Added feat allow user to add header to message and duplicate message #856

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a828089
Added feat allow user to add header to message and duplicate message
nguyen-tri-nhan Jun 14, 2026
c1cb99e
fix: Remove outline prop on button
nguyen-tri-nhan Jun 14, 2026
8bf9cab
fix: Remove unused debug env
nguyen-tri-nhan Jun 14, 2026
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1 change: 1 addition & 0 deletions src/main/java/kafdrop/controller/MessageController.java
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Original file line number Diff line number Diff line change
Expand Up @@ -303,6 +303,7 @@ public String addMessage(
} catch (Exception ex) {
model.addAttribute("errorMessage", ex.getMessage());
}
model.addAttribute("sendEnabled", sendEnabled);
return "message-inspector";
}

Expand Down
5 changes: 5 additions & 0 deletions src/main/java/kafdrop/model/CreateMessageVO.java
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Expand Up @@ -3,6 +3,9 @@
import lombok.Data;
import lombok.RequiredArgsConstructor;

import java.util.ArrayList;
import java.util.List;

@Data
@RequiredArgsConstructor
public final class CreateMessageVO {
Expand All @@ -14,4 +17,6 @@ public final class CreateMessageVO {
private String value;

private String topic;

private List<HeaderVO> headers = new ArrayList<>();
}
9 changes: 9 additions & 0 deletions src/main/java/kafdrop/model/HeaderVO.java
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@@ -0,0 +1,9 @@
package kafdrop.model;

import lombok.Data;

@Data
public class HeaderVO {
private String key;
private String value;
}
7 changes: 7 additions & 0 deletions src/main/java/kafdrop/service/KafkaHighLevelProducer.java
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Expand Up @@ -52,6 +52,13 @@ public RecordMetadata publishMessage(CreateMessageVO message, Serializers serial
message.getTopicPartition(), serializers.getKeySerializer().serializeMessage(message.getKey()),
serializers.getValueSerializer().serializeMessage(message.getValue()));

for (var header : message.getHeaders()) {
if (header.getKey() != null && !header.getKey().isBlank()) {
final var v = header.getValue() != null ? header.getValue() : "";
record.headers().add(header.getKey(), v.getBytes());
}
}

Future<RecordMetadata> result = kafkaProducer.send(record);
try {
RecordMetadata recordMetadata = result.get();
Expand Down
131 changes: 120 additions & 11 deletions src/main/resources/templates/message-inspector.ftlh
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Expand Up @@ -98,19 +98,19 @@
</div>


<div class="modal" id="addMessageModal" tabindex="-1" role="dialog" aria-labelledby="addMessageModalLabel" aria-hidden="true">
<div class="modal-dialog" role="document">
<div class="modal fade" id="addMessageModal" tabindex="-1" role="dialog" aria-labelledby="addMessageModalLabel" aria-hidden="true">
<div class="modal-dialog modal-lg" role="document">
<div class="modal-content">
<div class="modal-header">
<h5 class="modal-title" id="addMessageModalLabel">Add Message</h5>
<h5 class="modal-title" id="addMessageModalLabel"><i class="fa fa-paper-plane"></i>&nbsp; Add Message</h5>
<button type="button" class="close" data-dismiss="modal" aria-label="Close">
<span aria-hidden="true">&times;</span>
</button>
</div>
<form method="POST" action="<@spring.url '/topic/${topic.name}/addmessage'/>" id="addMessageForm">
<div class="modal-body">
<div class="form-group">
<label for="topicPartition">Topic Partition</label>
<label for="topicPartition"><i class="fa fa-sitemap"></i>&nbsp; Topic Partition</label>
<select name="topicPartition" class="form-control" id="topicPartition">
<#list topic.partitions as p>
<option value="${p.id}" data-first-offset="${p.firstOffset}" data-last-offset="${p.size}"
Expand All @@ -119,24 +119,71 @@
</select>
</div>
<div class="form-group">
<label for="messageKey">Key</label>
<input type="text" class="form-control" name="key" id="messageKey" placeholder="Key">
<label for="messageKey"><i class="fa fa-key"></i>&nbsp; Key</label>
<input type="text" class="form-control" name="key" id="messageKey" placeholder="Message key (optional)">
</div>
<div class="form-group">
<label for="messageValue">Value</label>
<input type="text" class="form-control" name="value" id="messageValue" placeholder="Value">
<div class="d-flex justify-content-between align-items-center mb-1">
<label for="messageValue" class="mb-0"><i class="fa fa-file-text-o"></i>&nbsp; Value</label>
<button type="button" class="btn btn-sm btn-outline-info" id="formatJsonBtn" title="Pretty-print JSON">
<i class="fa fa-code"></i>&nbsp; Format JSON
</button>
</div>
<textarea class="form-control" name="value" id="messageValue" rows="8"
placeholder='{"key": "value"}' style="font-family: monospace; font-size: 0.85em; resize: vertical;"></textarea>
<small class="form-text text-muted"><span id="valueCharCount">0</span> characters</small>
</div>
<div class="form-group">
<div class="d-flex justify-content-between align-items-center mb-1">
<label class="mb-0"><i class="fa fa-list"></i>&nbsp; Headers <small class="text-muted">(optional)</small></label>
<button type="button" class="btn btn-sm btn-secondary" id="addHeaderBtn">
<i class="fa fa-plus"></i>&nbsp; Add Header
</button>
</div>
<div id="headersContainer"></div>
</div>
<input type="hidden" name="topic" value="${topic.name}">
</div>
<div class="modal-footer">
<button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
<input type="submit" type="button" class="btn btn-success"></input>
<button type="button" class="btn btn-secondary" data-dismiss="modal"><i class="fa fa-times"></i>&nbsp; Close</button>
<button type="submit" class="btn btn-success"><i class="fa fa-paper-plane"></i>&nbsp; Send Message</button>
</div>
</form>
</div>
</div>
</div>

<script type="text/javascript">
(function() {
document.getElementById('formatJsonBtn').addEventListener('click', function() {
var ta = document.getElementById('messageValue');
try {
ta.value = JSON.stringify(JSON.parse(ta.value), null, 2);
ta.classList.remove('is-invalid');
} catch (e) {
ta.classList.add('is-invalid');
}
});

document.getElementById('messageValue').addEventListener('input', function() {
document.getElementById('valueCharCount').textContent = this.value.length;
});

document.getElementById('addHeaderBtn').addEventListener('click', function() {
var container = document.getElementById('headersContainer');
var index = container.children.length;
var row = document.createElement('div');
row.className = 'input-group mb-1';
row.innerHTML = '<input type="text" class="form-control" name="headers[' + index + '].key" placeholder="Header name">' +
'<input type="text" class="form-control" name="headers[' + index + '].value" placeholder="Header value">' +
'<div class="input-group-append">' +
'<button type="button" class="btn btn-outline-danger" onclick="this.closest(\'.input-group\').remove()">' +
'<i class="fa fa-trash"></i></button></div>';
container.appendChild(row);
});
})();
</script>


<div id="messageFormPanel" class="card">
<form method="GET" action="<@spring.url '/topic/${topic.name}/messages'/>" id="messageForm" class="form-inline card-body">
Expand Down Expand Up @@ -257,13 +304,27 @@
<#if messages?? && messages?size gt 0>
<#list messages as msg>
<div class="message-detail">
<#if sendEnabled>
<button type="button" class="btn btn-sm btn-secondary float-right copy-msg-btn"
data-msg-index="${msg?index}"
data-partition="${msg.partition}"
data-key="${msg.key!''}"
title="Duplicate this message">
<i class="fa fa-copy"></i>
</button>
<div class="d-none" id="msg-hdr-${msg?index}">
<#list msg.headers?keys as hk>
<span data-k="${hk}" data-v="${(msg.headers[hk])!''}"></span>
</#list>
</div>
</#if>
<span class="badge badge-light">Offset:</span> ${msg.offset} &nbsp;
<span class="badge badge-light">Key:</span> ${msg.key!''} &nbsp;
<span class="badge badge-light">Timestamp:</span> ${msg.timestamp?string('yyyy-MM-dd HH:mm:ss.SSS')}
<span class="badge badge-light">Headers:</span> ${msg.headersFormatted}
<div>
<a href="#" class="toggle-msg"><i class="fa fa-chevron-circle-right">&nbsp;</i></a>
<pre class="message-body">${msg.message!''}</pre>
<pre class="message-body" id="msg-body-${msg?index}">${msg.message!''}</pre>
</div>
</div>
</#list>
Expand All @@ -272,4 +333,52 @@
</#if>
</div>

<#if sendEnabled>
<script>
(function () {
document.addEventListener('click', function (e) {
var btn = e.target.closest('.copy-msg-btn');
if (!btn) return;

var idx = btn.dataset.msgIndex;
document.getElementById('topicPartition').value = btn.dataset.partition;
document.getElementById('messageKey').value = btn.dataset.key;

var ta = document.getElementById('messageValue');
ta.value = document.getElementById('msg-body-' + idx).textContent;
document.getElementById('valueCharCount').textContent = ta.value.length;

var container = document.getElementById('headersContainer');
container.innerHTML = '';
var hdrSpans = document.querySelectorAll('#msg-hdr-' + idx + ' span[data-k]');
hdrSpans.forEach(function (span, i) {
var row = document.createElement('div');
row.className = 'input-group mb-1';

var ki = document.createElement('input');
ki.type = 'text'; ki.className = 'form-control';
ki.name = 'headers[' + i + '].key'; ki.value = span.dataset.k;

var vi = document.createElement('input');
vi.type = 'text'; vi.className = 'form-control';
vi.name = 'headers[' + i + '].value'; vi.value = span.dataset.v;

var append = document.createElement('div');
append.className = 'input-group-append';
var del = document.createElement('button');
del.type = 'button'; del.className = 'btn btn-outline-danger';
del.innerHTML = '<i class="fa fa-trash"></i>';
del.onclick = function () { this.closest('.input-group').remove(); };
append.appendChild(del);

row.appendChild(ki); row.appendChild(vi); row.appendChild(append);
container.appendChild(row);
});

$('#addMessageModal').modal('show');
});
})();
</script>
</#if>

<@template.footer/>