/
s3selectquerier.go
182 lines (158 loc) · 5.17 KB
/
s3selectquerier.go
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package aws
import (
"context"
"encoding/csv"
"fmt"
"io"
"strconv"
"strings"
"time"
"github.com/aws/aws-sdk-go-v2/aws"
"github.com/aws/aws-sdk-go-v2/service/s3"
s3Types "github.com/aws/aws-sdk-go-v2/service/s3/types"
"github.com/opencost/opencost/core/pkg/util/stringutil"
"github.com/opencost/opencost/pkg/cloud"
)
type S3SelectQuerier struct {
S3Connection
connectionStatus cloud.ConnectionStatus
}
func (s3sq *S3SelectQuerier) Equals(config cloud.Config) bool {
thatConfig, ok := config.(*S3SelectQuerier)
if !ok {
return false
}
return s3sq.S3Connection.Equals(&thatConfig.S3Connection)
}
func (s3sq *S3SelectQuerier) Query(query string, queryKeys []string, cli *s3.Client, fn func(*csv.Reader) error) error {
for _, queryKey := range queryKeys {
reader, err2 := s3sq.fetchCSVReader(query, queryKey, cli, s3Types.FileHeaderInfoUse)
if err2 != nil {
return err2
}
err2 = fn(reader)
if err2 != nil {
return err2
}
}
return nil
}
// GetQueryKeys returns a list of s3 object names, where the there are 1 object for each month within the range between
// start and end
func (s3sq *S3SelectQuerier) GetQueryKeys(start, end time.Time, client *s3.Client) ([]string, error) {
objs, err := s3sq.ListObjects(client)
if err != nil {
return nil, err
}
monthStrings, err := getMonthStrings(start, end)
if err != err {
return nil, err
}
var queryKeys []string
// Find all matching "csv.gz" files per monthString
for _, monthStr := range monthStrings {
for _, obj := range objs.Contents {
if strings.Contains(*obj.Key, monthStr) && strings.HasSuffix(*obj.Key, ".csv.gz") {
queryKeys = append(queryKeys, *obj.Key)
}
}
}
if len(queryKeys) == 0 {
return nil, fmt.Errorf("no CUR files for given time range")
}
return queryKeys, nil
}
func (s3sq *S3SelectQuerier) fetchCSVReader(query string, queryKey string, client *s3.Client, fileHeaderInfo s3Types.FileHeaderInfo) (*csv.Reader, error) {
input := &s3.SelectObjectContentInput{
Bucket: aws.String(s3sq.Bucket),
Key: aws.String(queryKey),
Expression: aws.String(query),
ExpressionType: s3Types.ExpressionTypeSql,
InputSerialization: &s3Types.InputSerialization{
CompressionType: s3Types.CompressionTypeGzip,
CSV: &s3Types.CSVInput{
FileHeaderInfo: fileHeaderInfo,
},
},
OutputSerialization: &s3Types.OutputSerialization{
CSV: &s3Types.CSVOutput{},
},
}
res, err := client.SelectObjectContent(context.TODO(), input)
if err != nil {
return nil, err
}
resStream := res.GetStream()
// todo: this needs work
results, resultWriter := io.Pipe()
go func() {
defer resultWriter.Close()
defer resStream.Close()
resStream.Events()
for event := range resStream.Events() {
switch e := event.(type) {
case *s3Types.SelectObjectContentEventStreamMemberRecords:
resultWriter.Write(e.Value.Payload)
case *s3Types.SelectObjectContentEventStreamMemberEnd:
break
}
}
}()
if err := resStream.Err(); err != nil {
return nil, fmt.Errorf("failed to read from SelectObjectContent EventStream, %v", err)
}
return csv.NewReader(results), nil
}
func getMonthStrings(start, end time.Time) ([]string, error) {
if start.After(end) {
return []string{}, fmt.Errorf("start date must be before end date")
}
if end.After(time.Now()) {
end = time.Now()
}
dateTemplate := "%d%02d01-%d%02d01/"
// set to first of the month
currMonth := start.AddDate(0, 0, -start.Day()+1)
nextMonth := currMonth.AddDate(0, 1, 0)
monthStr := fmt.Sprintf(dateTemplate, currMonth.Year(), int(currMonth.Month()), nextMonth.Year(), int(nextMonth.Month()))
// Create string for end condition
endMonth := end.AddDate(0, 0, -end.Day()+1)
endNextMonth := endMonth.AddDate(0, 1, 0)
endStr := fmt.Sprintf(dateTemplate, endMonth.Year(), int(endMonth.Month()), endNextMonth.Year(), int(endNextMonth.Month()))
var monthStrs []string
monthStrs = append(monthStrs, monthStr)
for monthStr != endStr {
currMonth = nextMonth
nextMonth = nextMonth.AddDate(0, 1, 0)
monthStr = fmt.Sprintf(dateTemplate, currMonth.Year(), int(currMonth.Month()), nextMonth.Year(), int(nextMonth.Month()))
monthStrs = append(monthStrs, monthStr)
}
return monthStrs, nil
}
// GetCSVRowValue retrieve value from athena row based on column names and used stringutil.Bank() to prevent duplicate
// allocation of strings
func GetCSVRowValue(row []string, queryColumnIndexes map[string]int, columnName string) string {
if row == nil {
return ""
}
columnIndex, ok := queryColumnIndexes[columnName]
if !ok {
return ""
}
return stringutil.Bank(row[columnIndex])
}
// GetCSVRowValueFloat retrieve value from athena row based on column names and convert to float if possible.
func GetCSVRowValueFloat(row []string, queryColumnIndexes map[string]int, columnName string) (float64, error) {
if row == nil {
return 0.0, fmt.Errorf("getCSVRowValueFloat: nil row")
}
columnIndex, ok := queryColumnIndexes[columnName]
if !ok {
return 0.0, fmt.Errorf("getCSVRowValueFloat: missing column index: %s", columnName)
}
cost, err := strconv.ParseFloat(row[columnIndex], 64)
if err != nil {
return cost, fmt.Errorf("getCSVRowValueFloat: failed to parse %s: '%s': %s", columnName, row[columnIndex], err.Error())
}
return cost, nil
}