44 lines
1.5 KiB
Go
44 lines
1.5 KiB
Go
// Licensed to Elasticsearch B.V. under one or more contributor
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// license agreements. See the NOTICE file distributed with
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// this work for additional information regarding copyright
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// ownership. Elasticsearch B.V. licenses this file to you under
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// the Apache License, Version 2.0 (the "License"); you may
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// not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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package readfile
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import (
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"github.com/elastic/beats/filebeat/reader"
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)
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// Reader sets an upper limited on line length. Lines longer
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// then the max configured line length will be snapped short.
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type LimitReader struct {
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reader reader.Reader
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maxBytes int
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}
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// New creates a new reader limiting the line length.
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func NewLimitReader(r reader.Reader, maxBytes int) *LimitReader {
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return &LimitReader{reader: r, maxBytes: maxBytes}
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}
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// Next returns the next line.
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func (r *LimitReader) Next() (reader.Message, error) {
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message, err := r.reader.Next()
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if len(message.Content) > r.maxBytes {
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message.Content = message.Content[:r.maxBytes]
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message.AddFlagsWithKey("log.flags", "truncated")
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}
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return message, err
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}
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