github.com/codysnider/go-ethereum@v1.10.18-0.20220420071915-14f4ae99222a/metrics/librato/client.go (about)

     1  package librato
     2  
     3  import (
     4  	"bytes"
     5  	"encoding/json"
     6  	"fmt"
     7  	"io/ioutil"
     8  	"net/http"
     9  )
    10  
    11  const Operations = "operations"
    12  const OperationsShort = "ops"
    13  
    14  type LibratoClient struct {
    15  	Email, Token string
    16  }
    17  
    18  // property strings
    19  const (
    20  	// display attributes
    21  	Color             = "color"
    22  	DisplayMax        = "display_max"
    23  	DisplayMin        = "display_min"
    24  	DisplayUnitsLong  = "display_units_long"
    25  	DisplayUnitsShort = "display_units_short"
    26  	DisplayStacked    = "display_stacked"
    27  	DisplayTransform  = "display_transform"
    28  	// special gauge display attributes
    29  	SummarizeFunction = "summarize_function"
    30  	Aggregate         = "aggregate"
    31  
    32  	// metric keys
    33  	Name        = "name"
    34  	Period      = "period"
    35  	Description = "description"
    36  	DisplayName = "display_name"
    37  	Attributes  = "attributes"
    38  
    39  	// measurement keys
    40  	MeasureTime = "measure_time"
    41  	Source      = "source"
    42  	Value       = "value"
    43  
    44  	// special gauge keys
    45  	Count      = "count"
    46  	Sum        = "sum"
    47  	Max        = "max"
    48  	Min        = "min"
    49  	SumSquares = "sum_squares"
    50  
    51  	// batch keys
    52  	Counters = "counters"
    53  	Gauges   = "gauges"
    54  
    55  	MetricsPostUrl = "https://metrics-api.librato.com/v1/metrics"
    56  )
    57  
    58  type Measurement map[string]interface{}
    59  type Metric map[string]interface{}
    60  
    61  type Batch struct {
    62  	Gauges      []Measurement `json:"gauges,omitempty"`
    63  	Counters    []Measurement `json:"counters,omitempty"`
    64  	MeasureTime int64         `json:"measure_time"`
    65  	Source      string        `json:"source"`
    66  }
    67  
    68  func (c *LibratoClient) PostMetrics(batch Batch) (err error) {
    69  	var (
    70  		js   []byte
    71  		req  *http.Request
    72  		resp *http.Response
    73  	)
    74  
    75  	if len(batch.Counters) == 0 && len(batch.Gauges) == 0 {
    76  		return nil
    77  	}
    78  
    79  	if js, err = json.Marshal(batch); err != nil {
    80  		return
    81  	}
    82  
    83  	if req, err = http.NewRequest("POST", MetricsPostUrl, bytes.NewBuffer(js)); err != nil {
    84  		return
    85  	}
    86  
    87  	req.Header.Set("Content-Type", "application/json")
    88  	req.SetBasicAuth(c.Email, c.Token)
    89  
    90  	if resp, err = http.DefaultClient.Do(req); err != nil {
    91  		return
    92  	}
    93  
    94  	if resp.StatusCode != http.StatusOK {
    95  		var body []byte
    96  		if body, err = ioutil.ReadAll(resp.Body); err != nil {
    97  			body = []byte(fmt.Sprintf("(could not fetch response body for error: %s)", err))
    98  		}
    99  		err = fmt.Errorf("unable to post to Librato: %d %s %s", resp.StatusCode, resp.Status, string(body))
   100  	}
   101  	return
   102  }