forked from grafana/loki
/
request_handler.go
183 lines (151 loc) · 5.59 KB
/
request_handler.go
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package purger
import (
"encoding/json"
"fmt"
"net/http"
"time"
"github.com/go-kit/kit/log/level"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promauto"
"github.com/prometheus/common/model"
"github.com/prometheus/prometheus/promql/parser"
"github.com/cortexproject/cortex/pkg/tenant"
"github.com/cortexproject/cortex/pkg/util"
util_log "github.com/cortexproject/cortex/pkg/util/log"
)
type deleteRequestHandlerMetrics struct {
deleteRequestsReceivedTotal *prometheus.CounterVec
}
func newDeleteRequestHandlerMetrics(r prometheus.Registerer) *deleteRequestHandlerMetrics {
m := deleteRequestHandlerMetrics{}
m.deleteRequestsReceivedTotal = promauto.With(r).NewCounterVec(prometheus.CounterOpts{
Namespace: "loki",
Name: "purger_delete_requests_received_total",
Help: "Number of delete requests received per user",
}, []string{"user"})
return &m
}
// DeleteRequestHandler provides handlers for delete requests
type DeleteRequestHandler struct {
deleteStore *DeleteStore
metrics *deleteRequestHandlerMetrics
deleteRequestCancelPeriod time.Duration
}
// NewDeleteRequestHandler creates a DeleteRequestHandler
func NewDeleteRequestHandler(deleteStore *DeleteStore, deleteRequestCancelPeriod time.Duration, registerer prometheus.Registerer) *DeleteRequestHandler {
deleteMgr := DeleteRequestHandler{
deleteStore: deleteStore,
deleteRequestCancelPeriod: deleteRequestCancelPeriod,
metrics: newDeleteRequestHandlerMetrics(registerer),
}
return &deleteMgr
}
// AddDeleteRequestHandler handles addition of new delete request
func (dm *DeleteRequestHandler) AddDeleteRequestHandler(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
userID, err := tenant.TenantID(ctx)
if err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
params := r.URL.Query()
match := params["match[]"]
if len(match) == 0 {
http.Error(w, "selectors not set", http.StatusBadRequest)
return
}
for i := range match {
_, err := parser.ParseMetricSelector(match[i])
if err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
}
startParam := params.Get("start")
startTime := int64(0)
if startParam != "" {
startTime, err = util.ParseTime(startParam)
if err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
}
endParam := params.Get("end")
endTime := int64(model.Now())
if endParam != "" {
endTime, err = util.ParseTime(endParam)
if err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
if endTime > int64(model.Now()) {
http.Error(w, "deletes in future not allowed", http.StatusBadRequest)
return
}
}
if startTime > endTime {
http.Error(w, "start time can't be greater than end time", http.StatusBadRequest)
return
}
if err := dm.deleteStore.AddDeleteRequest(ctx, userID, model.Time(startTime), model.Time(endTime), match); err != nil {
level.Error(util_log.Logger).Log("msg", "error adding delete request to the store", "err", err)
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
dm.metrics.deleteRequestsReceivedTotal.WithLabelValues(userID).Inc()
w.WriteHeader(http.StatusNoContent)
}
// GetAllDeleteRequestsHandler handles get all delete requests
func (dm *DeleteRequestHandler) GetAllDeleteRequestsHandler(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
userID, err := tenant.TenantID(ctx)
if err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
deleteRequests, err := dm.deleteStore.GetAllDeleteRequestsForUser(ctx, userID)
if err != nil {
level.Error(util_log.Logger).Log("msg", "error getting delete requests from the store", "err", err)
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
if err := json.NewEncoder(w).Encode(deleteRequests); err != nil {
level.Error(util_log.Logger).Log("msg", "error marshalling response", "err", err)
http.Error(w, fmt.Sprintf("Error marshalling response: %v", err), http.StatusInternalServerError)
}
}
// CancelDeleteRequestHandler handles delete request cancellation
func (dm *DeleteRequestHandler) CancelDeleteRequestHandler(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
userID, err := tenant.TenantID(ctx)
if err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
params := r.URL.Query()
requestID := params.Get("request_id")
deleteRequest, err := dm.deleteStore.GetDeleteRequest(ctx, userID, requestID)
if err != nil {
level.Error(util_log.Logger).Log("msg", "error getting delete request from the store", "err", err)
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
if deleteRequest == nil {
http.Error(w, "could not find delete request with given id", http.StatusBadRequest)
return
}
if deleteRequest.Status != StatusReceived {
http.Error(w, "deletion of request which is in process or already processed is not allowed", http.StatusBadRequest)
return
}
if deleteRequest.CreatedAt.Add(dm.deleteRequestCancelPeriod).Before(model.Now()) {
http.Error(w, fmt.Sprintf("deletion of request past the deadline of %s since its creation is not allowed", dm.deleteRequestCancelPeriod.String()), http.StatusBadRequest)
return
}
if err := dm.deleteStore.RemoveDeleteRequest(ctx, userID, requestID, deleteRequest.CreatedAt, deleteRequest.StartTime, deleteRequest.EndTime); err != nil {
level.Error(util_log.Logger).Log("msg", "error cancelling the delete request", "err", err)
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
w.WriteHeader(http.StatusNoContent)
}