You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
67 lines
1.9 KiB
67 lines
1.9 KiB
package kafka |
|
|
|
/** |
|
* Copyright 2018 Confluent Inc. |
|
* |
|
* Licensed under the Apache License, Version 2.0 (the "License"); |
|
* you may not use this file except in compliance with the License. |
|
* You may obtain a copy of the License at |
|
* |
|
* http://www.apache.org/licenses/LICENSE-2.0 |
|
* |
|
* Unless required by applicable law or agreed to in writing, software |
|
* distributed under the License is distributed on an "AS IS" BASIS, |
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
|
* See the License for the specific language governing permissions and |
|
* limitations under the License. |
|
*/ |
|
|
|
import ( |
|
"fmt" |
|
"strconv" |
|
) |
|
|
|
/* |
|
#include <string.h> |
|
#include "select_rdkafka.h" |
|
#include "glue_rdkafka.h" |
|
*/ |
|
import "C" |
|
|
|
// Header represents a single Kafka message header. |
|
// |
|
// Message headers are made up of a list of Header elements, retaining their original insert |
|
// order and allowing for duplicate Keys. |
|
// |
|
// Key is a human readable string identifying the header. |
|
// Value is the key's binary value, Kafka does not put any restrictions on the format of |
|
// of the Value but it should be made relatively compact. |
|
// The value may be a byte array, empty, or nil. |
|
// |
|
// NOTE: Message headers are not available on producer delivery report messages. |
|
type Header struct { |
|
Key string // Header name (utf-8 string) |
|
Value []byte // Header value (nil, empty, or binary) |
|
} |
|
|
|
// String returns the Header Key and data in a human representable possibly truncated form |
|
// suitable for displaying to the user. |
|
func (h Header) String() string { |
|
if h.Value == nil { |
|
return fmt.Sprintf("%s=nil", h.Key) |
|
} |
|
|
|
valueLen := len(h.Value) |
|
if valueLen == 0 { |
|
return fmt.Sprintf("%s=<empty>", h.Key) |
|
} |
|
|
|
truncSize := valueLen |
|
trunc := "" |
|
if valueLen > 50+15 { |
|
truncSize = 50 |
|
trunc = fmt.Sprintf("(%d more bytes)", valueLen-truncSize) |
|
} |
|
|
|
return fmt.Sprintf("%s=%s%s", h.Key, strconv.Quote(string(h.Value[:truncSize])), trunc) |
|
}
|
|
|