github.com/alibaba/ilogtail/pkg@v0.0.0-20250526110833-c53b480d046c/protocol/decoder/statsd/decoder.go (about)

     1  // Copyright 2022 iLogtail Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package statsd
    16  
    17  import (
    18  	"bytes"
    19  	"context"
    20  	"net/http"
    21  	"time"
    22  
    23  	"github.com/alibaba/ilogtail/pkg/helper"
    24  	"github.com/alibaba/ilogtail/pkg/logger"
    25  	"github.com/alibaba/ilogtail/pkg/models"
    26  	"github.com/alibaba/ilogtail/pkg/protocol"
    27  	"github.com/alibaba/ilogtail/pkg/protocol/decoder/common"
    28  
    29  	dogstatsd "github.com/narqo/go-dogstatsd-parser"
    30  )
    31  
    32  type Decoder struct {
    33  	Time time.Time
    34  }
    35  
    36  func parseLabels(metric *dogstatsd.Metric) *helper.MetricLabels {
    37  	var labels helper.MetricLabels
    38  	for k, v := range metric.Tags {
    39  		labels.Append(k, v)
    40  	}
    41  	return &labels
    42  }
    43  
    44  func (d *Decoder) Decode(data []byte, req *http.Request, tags map[string]string) (logs []*protocol.Log, err error) {
    45  	now := time.Now()
    46  	parts := bytes.Split(data, []byte("\n"))
    47  	for _, part := range parts {
    48  		if len(part) == 0 {
    49  			continue
    50  		}
    51  		m, err := dogstatsd.Parse(string(part))
    52  		if err != nil {
    53  			logger.Debug(context.Background(), "parse statsd error", err)
    54  			if time.Since(d.Time).Seconds() > 10 {
    55  				logger.Error(context.Background(), "STATSD_PARSE_ALARM", "parse err", err)
    56  				d.Time = time.Now()
    57  			}
    58  			continue
    59  		}
    60  		log := helper.NewMetricLog(m.Name, now.UnixNano(), m.Value.(float64), parseLabels(m))
    61  		logs = append(logs, log)
    62  	}
    63  	return
    64  }
    65  
    66  func (d *Decoder) ParseRequest(res http.ResponseWriter, req *http.Request, maxBodySize int64) (data []byte, statusCode int, err error) {
    67  	return common.CollectBody(res, req, maxBodySize)
    68  }
    69  
    70  func (d *Decoder) DecodeV2(data []byte, req *http.Request) (groups []*models.PipelineGroupEvents, err error) {
    71  	//TODO: Implement DecodeV2
    72  	return nil, nil
    73  }