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usage_service.go
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usage_service.go
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package http
import (
"context"
"errors"
"net/http"
"time"
platform "github.com/influxdata/influxdb"
"github.com/julienschmidt/httprouter"
"go.uber.org/zap"
)
// UsageHandler represents an HTTP API handler for usages.
type UsageHandler struct {
*httprouter.Router
Logger *zap.Logger
UsageService platform.UsageService
}
// NewUsageHandler returns a new instance of UsageHandler.
func NewUsageHandler() *UsageHandler {
h := &UsageHandler{
Router: NewRouter(),
Logger: zap.NewNop(),
}
h.HandlerFunc("GET", "/api/v2/usage", h.handleGetUsage)
return h
}
// handleGetUsage is the HTTP handler for the GET /api/v2/usage route.
func (h *UsageHandler) handleGetUsage(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
req, err := decodeGetUsageRequest(ctx, r)
if err != nil {
EncodeError(ctx, err, w)
return
}
b, err := h.UsageService.GetUsage(ctx, req.filter)
if err != nil {
EncodeError(ctx, err, w)
return
}
if err := encodeResponse(ctx, w, http.StatusOK, b); err != nil {
logEncodingError(h.Logger, r, err)
return
}
}
type getUsageRequest struct {
filter platform.UsageFilter
}
func decodeGetUsageRequest(ctx context.Context, r *http.Request) (*getUsageRequest, error) {
req := &getUsageRequest{}
qp := r.URL.Query()
orgID := qp.Get("orgID")
if orgID != "" {
var id platform.ID
if err := (&id).DecodeFromString(orgID); err != nil {
return nil, err
}
req.filter.OrgID = &id
}
bucketID := qp.Get("bucketID")
if bucketID != "" {
var id platform.ID
if err := (&id).DecodeFromString(bucketID); err != nil {
return nil, err
}
req.filter.BucketID = &id
}
start := qp.Get("start")
stop := qp.Get("stop")
if start == "" && stop != "" {
return nil, errors.New("start query param required")
}
if stop == "" && start != "" {
return nil, errors.New("stop query param required")
}
if start == "" && stop == "" {
now := time.Now()
month := roundToMonth(now)
req.filter.Range = &platform.Timespan{
Start: month,
Stop: now,
}
}
if start != "" && stop != "" {
startTime, err := time.Parse(time.RFC3339, start)
if err != nil {
return nil, err
}
stopTime, err := time.Parse(time.RFC3339, stop)
if err != nil {
return nil, err
}
req.filter.Range = &platform.Timespan{
Start: startTime,
Stop: stopTime,
}
}
return req, nil
}
func roundToMonth(t time.Time) time.Time {
h, m, s := t.Clock()
d := t.Day()
delta := (time.Duration(d) * 24 * time.Hour) + time.Duration(h)*time.Hour + time.Duration(m)*time.Minute + time.Duration(s)*time.Second
return t.Add(-1 * delta).Round(time.Minute)
}