diff --git a/app/vmselect/clusternative/vmselect.go b/app/vmselect/clusternative/vmselect.go
index c79126a60..29791a58d 100644
--- a/app/vmselect/clusternative/vmselect.go
+++ b/app/vmselect/clusternative/vmselect.go
@@ -8,6 +8,7 @@ import (
 	"github.com/VictoriaMetrics/VictoriaMetrics/app/vmselect/netstorage"
 	"github.com/VictoriaMetrics/VictoriaMetrics/app/vmselect/searchutils"
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/cgroup"
+	"github.com/VictoriaMetrics/VictoriaMetrics/lib/httputils"
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/querytracer"
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/storage"
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/vmselectapi"
@@ -47,7 +48,7 @@ func NewVMSelectServer(addr string) (*vmselectapi.Server, error) {
 type vmstorageAPI struct{}
 
 func (api *vmstorageAPI) InitSearch(qt *querytracer.Tracer, sq *storage.SearchQuery, deadline uint64) (vmselectapi.BlockIterator, error) {
-	denyPartialResponse := searchutils.GetDenyPartialResponse(nil)
+	denyPartialResponse := httputils.GetDenyPartialResponse(nil)
 	dl := searchutils.DeadlineFromTimestamp(deadline)
 	bi := newBlockIterator(qt, denyPartialResponse, sq, dl)
 	return bi, nil
@@ -59,14 +60,14 @@ func (api *vmstorageAPI) Tenants(qt *querytracer.Tracer, tr storage.TimeRange, d
 }
 
 func (api *vmstorageAPI) SearchMetricNames(qt *querytracer.Tracer, sq *storage.SearchQuery, deadline uint64) ([]string, error) {
-	denyPartialResponse := searchutils.GetDenyPartialResponse(nil)
+	denyPartialResponse := httputils.GetDenyPartialResponse(nil)
 	dl := searchutils.DeadlineFromTimestamp(deadline)
 	metricNames, _, err := netstorage.SearchMetricNames(qt, denyPartialResponse, sq, dl)
 	return metricNames, err
 }
 
 func (api *vmstorageAPI) LabelValues(qt *querytracer.Tracer, sq *storage.SearchQuery, labelName string, maxLabelValues int, deadline uint64) ([]string, error) {
-	denyPartialResponse := searchutils.GetDenyPartialResponse(nil)
+	denyPartialResponse := httputils.GetDenyPartialResponse(nil)
 	dl := searchutils.DeadlineFromTimestamp(deadline)
 	labelValues, _, err := netstorage.LabelValues(qt, denyPartialResponse, labelName, sq, maxLabelValues, dl)
 	return labelValues, err
@@ -74,28 +75,28 @@ func (api *vmstorageAPI) LabelValues(qt *querytracer.Tracer, sq *storage.SearchQ
 
 func (api *vmstorageAPI) TagValueSuffixes(qt *querytracer.Tracer, accountID, projectID uint32, tr storage.TimeRange, tagKey, tagValuePrefix string, delimiter byte,
 	maxSuffixes int, deadline uint64) ([]string, error) {
-	denyPartialResponse := searchutils.GetDenyPartialResponse(nil)
+	denyPartialResponse := httputils.GetDenyPartialResponse(nil)
 	dl := searchutils.DeadlineFromTimestamp(deadline)
 	suffixes, _, err := netstorage.TagValueSuffixes(qt, accountID, projectID, denyPartialResponse, tr, tagKey, tagValuePrefix, delimiter, maxSuffixes, dl)
 	return suffixes, err
 }
 
 func (api *vmstorageAPI) LabelNames(qt *querytracer.Tracer, sq *storage.SearchQuery, maxLabelNames int, deadline uint64) ([]string, error) {
-	denyPartialResponse := searchutils.GetDenyPartialResponse(nil)
+	denyPartialResponse := httputils.GetDenyPartialResponse(nil)
 	dl := searchutils.DeadlineFromTimestamp(deadline)
 	labelNames, _, err := netstorage.LabelNames(qt, denyPartialResponse, sq, maxLabelNames, dl)
 	return labelNames, err
 }
 
 func (api *vmstorageAPI) SeriesCount(qt *querytracer.Tracer, accountID, projectID uint32, deadline uint64) (uint64, error) {
-	denyPartialResponse := searchutils.GetDenyPartialResponse(nil)
+	denyPartialResponse := httputils.GetDenyPartialResponse(nil)
 	dl := searchutils.DeadlineFromTimestamp(deadline)
 	seriesCount, _, err := netstorage.SeriesCount(qt, accountID, projectID, denyPartialResponse, dl)
 	return seriesCount, err
 }
 
 func (api *vmstorageAPI) TSDBStatus(qt *querytracer.Tracer, sq *storage.SearchQuery, focusLabel string, topN int, deadline uint64) (*storage.TSDBStatus, error) {
-	denyPartialResponse := searchutils.GetDenyPartialResponse(nil)
+	denyPartialResponse := httputils.GetDenyPartialResponse(nil)
 	dl := searchutils.DeadlineFromTimestamp(deadline)
 	tsdbStatus, _, err := netstorage.TSDBStatus(qt, denyPartialResponse, sq, focusLabel, topN, dl)
 	return tsdbStatus, err
diff --git a/app/vmselect/graphite/functions_api.go b/app/vmselect/graphite/functions_api.go
index a8140b3e1..2a39933d6 100644
--- a/app/vmselect/graphite/functions_api.go
+++ b/app/vmselect/graphite/functions_api.go
@@ -8,14 +8,14 @@ import (
 	"net/http"
 	"time"
 
-	"github.com/VictoriaMetrics/VictoriaMetrics/app/vmselect/searchutils"
+	"github.com/VictoriaMetrics/VictoriaMetrics/lib/httputils"
 )
 
 // FunctionsHandler implements /functions handler.
 //
 // See https://graphite.readthedocs.io/en/latest/functions.html#function-api
 func FunctionsHandler(startTime time.Time, w http.ResponseWriter, r *http.Request) error {
-	grouped := searchutils.GetBool(r, "grouped")
+	grouped := httputils.GetBool(r, "grouped")
 	group := r.FormValue("group")
 	result := make(map[string]interface{})
 	for funcName, fi := range funcs {
diff --git a/app/vmselect/graphite/metrics_api.go b/app/vmselect/graphite/metrics_api.go
index 6034b872d..7209407d6 100644
--- a/app/vmselect/graphite/metrics_api.go
+++ b/app/vmselect/graphite/metrics_api.go
@@ -10,10 +10,11 @@ import (
 	"sync"
 	"time"
 
-	"github.com/VictoriaMetrics/VictoriaMetrics/app/vmselect/bufferedwriter"
 	"github.com/VictoriaMetrics/VictoriaMetrics/app/vmselect/netstorage"
 	"github.com/VictoriaMetrics/VictoriaMetrics/app/vmselect/searchutils"
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/auth"
+	"github.com/VictoriaMetrics/VictoriaMetrics/lib/bufferedwriter"
+	"github.com/VictoriaMetrics/VictoriaMetrics/lib/httputils"
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/logger"
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/storage"
 	"github.com/VictoriaMetrics/metrics"
@@ -47,7 +48,7 @@ func MetricsFindHandler(startTime time.Time, at *auth.Token, w http.ResponseWrit
 	if len(delimiter) > 1 {
 		return fmt.Errorf("`delimiter` query arg must contain only a single char")
 	}
-	if searchutils.GetBool(r, "automatic_variants") {
+	if httputils.GetBool(r, "automatic_variants") {
 		// See https://github.com/graphite-project/graphite-web/blob/bb9feb0e6815faa73f538af6ed35adea0fb273fd/webapp/graphite/metrics/views.py#L152
 		query = addAutomaticVariants(query, delimiter)
 	}
@@ -58,19 +59,19 @@ func MetricsFindHandler(startTime time.Time, at *auth.Token, w http.ResponseWrit
 			query += "*"
 		}
 	}
-	leavesOnly := searchutils.GetBool(r, "leavesOnly")
-	wildcards := searchutils.GetBool(r, "wildcards")
+	leavesOnly := httputils.GetBool(r, "leavesOnly")
+	wildcards := httputils.GetBool(r, "wildcards")
 	label := r.FormValue("label")
 	if label == "__name__" {
 		label = ""
 	}
 	jsonp := r.FormValue("jsonp")
-	from, err := searchutils.GetTime(r, "from", 0)
+	from, err := httputils.GetTime(r, "from", 0)
 	if err != nil {
 		return err
 	}
 	ct := startTime.UnixNano() / 1e6
-	until, err := searchutils.GetTime(r, "until", ct)
+	until, err := httputils.GetTime(r, "until", ct)
 	if err != nil {
 		return err
 	}
@@ -78,7 +79,7 @@ func MetricsFindHandler(startTime time.Time, at *auth.Token, w http.ResponseWrit
 		MinTimestamp: from,
 		MaxTimestamp: until,
 	}
-	denyPartialResponse := searchutils.GetDenyPartialResponse(r)
+	denyPartialResponse := httputils.GetDenyPartialResponse(r)
 	paths, isPartial, err := metricsFind(at, denyPartialResponse, tr, label, "", query, delimiter[0], false, deadline)
 	if err != nil {
 		return err
@@ -126,8 +127,8 @@ func MetricsExpandHandler(startTime time.Time, at *auth.Token, w http.ResponseWr
 	if len(queries) == 0 {
 		return fmt.Errorf("missing `query` arg")
 	}
-	groupByExpr := searchutils.GetBool(r, "groupByExpr")
-	leavesOnly := searchutils.GetBool(r, "leavesOnly")
+	groupByExpr := httputils.GetBool(r, "groupByExpr")
+	leavesOnly := httputils.GetBool(r, "leavesOnly")
 	label := r.FormValue("label")
 	if label == "__name__" {
 		label = ""
@@ -140,12 +141,12 @@ func MetricsExpandHandler(startTime time.Time, at *auth.Token, w http.ResponseWr
 		return fmt.Errorf("`delimiter` query arg must contain only a single char")
 	}
 	jsonp := r.FormValue("jsonp")
-	from, err := searchutils.GetTime(r, "from", 0)
+	from, err := httputils.GetTime(r, "from", 0)
 	if err != nil {
 		return err
 	}
 	ct := startTime.UnixNano() / 1e6
-	until, err := searchutils.GetTime(r, "until", ct)
+	until, err := httputils.GetTime(r, "until", ct)
 	if err != nil {
 		return err
 	}
@@ -155,7 +156,7 @@ func MetricsExpandHandler(startTime time.Time, at *auth.Token, w http.ResponseWr
 	}
 	m := make(map[string][]string, len(queries))
 	isPartialResponse := false
-	denyPartialResponse := searchutils.GetDenyPartialResponse(r)
+	denyPartialResponse := httputils.GetDenyPartialResponse(r)
 	for _, query := range queries {
 		paths, isPartial, err := metricsFind(at, denyPartialResponse, tr, label, "", query, delimiter[0], true, deadline)
 		if err != nil {
@@ -208,7 +209,7 @@ func MetricsExpandHandler(startTime time.Time, at *auth.Token, w http.ResponseWr
 func MetricsIndexHandler(startTime time.Time, at *auth.Token, w http.ResponseWriter, r *http.Request) error {
 	deadline := searchutils.GetDeadlineForQuery(r, startTime)
 	jsonp := r.FormValue("jsonp")
-	denyPartialResponse := searchutils.GetDenyPartialResponse(r)
+	denyPartialResponse := httputils.GetDenyPartialResponse(r)
 	sq := storage.NewSearchQuery(at.AccountID, at.ProjectID, 0, 0, nil, 0)
 	metricNames, isPartial, err := netstorage.LabelValues(nil, denyPartialResponse, "__name__", sq, 0, deadline)
 	if err != nil {
diff --git a/app/vmselect/graphite/render_api.go b/app/vmselect/graphite/render_api.go
index 1b2d9e891..ab000ff22 100644
--- a/app/vmselect/graphite/render_api.go
+++ b/app/vmselect/graphite/render_api.go
@@ -8,9 +8,9 @@ import (
 	"strings"
 	"time"
 
-	"github.com/VictoriaMetrics/VictoriaMetrics/app/vmselect/bufferedwriter"
 	"github.com/VictoriaMetrics/VictoriaMetrics/app/vmselect/searchutils"
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/auth"
+	"github.com/VictoriaMetrics/VictoriaMetrics/lib/bufferedwriter"
 	"github.com/VictoriaMetrics/metrics"
 )
 
diff --git a/app/vmselect/graphite/tags_api.go b/app/vmselect/graphite/tags_api.go
index 0f79fe4ce..f26a63b51 100644
--- a/app/vmselect/graphite/tags_api.go
+++ b/app/vmselect/graphite/tags_api.go
@@ -9,10 +9,11 @@ import (
 	"strings"
 	"time"
 
-	"github.com/VictoriaMetrics/VictoriaMetrics/app/vmselect/bufferedwriter"
 	"github.com/VictoriaMetrics/VictoriaMetrics/app/vmselect/netstorage"
 	"github.com/VictoriaMetrics/VictoriaMetrics/app/vmselect/searchutils"
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/auth"
+	"github.com/VictoriaMetrics/VictoriaMetrics/lib/bufferedwriter"
+	"github.com/VictoriaMetrics/VictoriaMetrics/lib/httputils"
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/prompb"
 	graphiteparser "github.com/VictoriaMetrics/VictoriaMetrics/lib/protoparser/graphite"
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/storage"
@@ -165,7 +166,7 @@ var (
 // See https://graphite.readthedocs.io/en/stable/tags.html#auto-complete-support
 func TagsAutoCompleteValuesHandler(startTime time.Time, at *auth.Token, w http.ResponseWriter, r *http.Request) error {
 	deadline := searchutils.GetDeadlineForQuery(r, startTime)
-	limit, err := searchutils.GetInt(r, "limit")
+	limit, err := httputils.GetInt(r, "limit")
 	if err != nil {
 		return err
 	}
@@ -180,7 +181,7 @@ func TagsAutoCompleteValuesHandler(startTime time.Time, at *auth.Token, w http.R
 	valuePrefix := r.FormValue("valuePrefix")
 	exprs := r.Form["expr"]
 	var tagValues []string
-	denyPartialResponse := searchutils.GetDenyPartialResponse(r)
+	denyPartialResponse := httputils.GetDenyPartialResponse(r)
 	etfs, err := searchutils.GetExtraTagFilters(r)
 	if err != nil {
 		return fmt.Errorf("cannot setup tag filters: %w", err)
@@ -258,7 +259,7 @@ var tagsAutoCompleteValuesDuration = metrics.NewSummary(`vm_request_duration_sec
 // See https://graphite.readthedocs.io/en/stable/tags.html#auto-complete-support
 func TagsAutoCompleteTagsHandler(startTime time.Time, at *auth.Token, w http.ResponseWriter, r *http.Request) error {
 	deadline := searchutils.GetDeadlineForQuery(r, startTime)
-	limit, err := searchutils.GetInt(r, "limit")
+	limit, err := httputils.GetInt(r, "limit")
 	if err != nil {
 		return err
 	}
@@ -268,7 +269,7 @@ func TagsAutoCompleteTagsHandler(startTime time.Time, at *auth.Token, w http.Res
 	}
 	tagPrefix := r.FormValue("tagPrefix")
 	exprs := r.Form["expr"]
-	denyPartialResponse := searchutils.GetDenyPartialResponse(r)
+	denyPartialResponse := httputils.GetDenyPartialResponse(r)
 	etfs, err := searchutils.GetExtraTagFilters(r)
 	if err != nil {
 		return fmt.Errorf("cannot setup tag filters: %w", err)
@@ -344,7 +345,7 @@ var tagsAutoCompleteTagsDuration = metrics.NewSummary(`vm_request_duration_secon
 // See https://graphite.readthedocs.io/en/stable/tags.html#exploring-tags
 func TagsFindSeriesHandler(startTime time.Time, at *auth.Token, w http.ResponseWriter, r *http.Request) error {
 	deadline := searchutils.GetDeadlineForQuery(r, startTime)
-	limit, err := searchutils.GetInt(r, "limit")
+	limit, err := httputils.GetInt(r, "limit")
 	if err != nil {
 		return err
 	}
@@ -360,7 +361,7 @@ func TagsFindSeriesHandler(startTime time.Time, at *auth.Token, w http.ResponseW
 	if err != nil {
 		return err
 	}
-	denyPartialResponse := searchutils.GetDenyPartialResponse(r)
+	denyPartialResponse := httputils.GetDenyPartialResponse(r)
 	metricNames, isPartial, err := netstorage.SearchMetricNames(nil, denyPartialResponse, sq, deadline)
 	if err != nil {
 		return fmt.Errorf("cannot fetch metric names for %q: %w", sq, err)
@@ -420,12 +421,12 @@ var tagsFindSeriesDuration = metrics.NewSummary(`vm_request_duration_seconds{pat
 // See https://graphite.readthedocs.io/en/stable/tags.html#exploring-tags
 func TagValuesHandler(startTime time.Time, at *auth.Token, tagName string, w http.ResponseWriter, r *http.Request) error {
 	deadline := searchutils.GetDeadlineForQuery(r, startTime)
-	limit, err := searchutils.GetInt(r, "limit")
+	limit, err := httputils.GetInt(r, "limit")
 	if err != nil {
 		return err
 	}
 	filter := r.FormValue("filter")
-	denyPartialResponse := searchutils.GetDenyPartialResponse(r)
+	denyPartialResponse := httputils.GetDenyPartialResponse(r)
 	tagValues, isPartial, err := netstorage.GraphiteTagValues(nil, at.AccountID, at.ProjectID, denyPartialResponse, tagName, filter, *maxGraphiteTagValuesPerSearch, deadline)
 	if err != nil {
 		return err
@@ -452,12 +453,12 @@ var tagValuesDuration = metrics.NewSummary(`vm_request_duration_seconds{path="/t
 // See https://graphite.readthedocs.io/en/stable/tags.html#exploring-tags
 func TagsHandler(startTime time.Time, at *auth.Token, w http.ResponseWriter, r *http.Request) error {
 	deadline := searchutils.GetDeadlineForQuery(r, startTime)
-	limit, err := searchutils.GetInt(r, "limit")
+	limit, err := httputils.GetInt(r, "limit")
 	if err != nil {
 		return err
 	}
 	filter := r.FormValue("filter")
-	denyPartialResponse := searchutils.GetDenyPartialResponse(r)
+	denyPartialResponse := httputils.GetDenyPartialResponse(r)
 	labels, isPartial, err := netstorage.GraphiteTags(nil, at.AccountID, at.ProjectID, denyPartialResponse, filter, *maxGraphiteTagKeysPerSearch, deadline)
 	if err != nil {
 		return err
diff --git a/app/vmselect/main.go b/app/vmselect/main.go
index bf551d9bc..0efc4550d 100644
--- a/app/vmselect/main.go
+++ b/app/vmselect/main.go
@@ -25,6 +25,7 @@ import (
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/flagutil"
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/fs"
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/httpserver"
+	"github.com/VictoriaMetrics/VictoriaMetrics/lib/httputils"
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/logger"
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/procutil"
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/promrelabel"
@@ -191,7 +192,7 @@ func requestHandler(w http.ResponseWriter, r *http.Request) bool {
 
 	startTime := time.Now()
 	defer requestDuration.UpdateDuration(startTime)
-	tracerEnabled := searchutils.GetBool(r, "trace")
+	tracerEnabled := httputils.GetBool(r, "trace")
 	qt := querytracer.New(tracerEnabled, r.URL.Path)
 
 	// Limit the number of concurrent queries.
@@ -216,7 +217,7 @@ func requestHandler(w http.ResponseWriter, r *http.Request) bool {
 			remoteAddr := httpserver.GetQuotedRemoteAddr(r)
 			requestURI := httpserver.GetRequestURI(r)
 			logger.Infof("client has cancelled the request after %.3f seconds: remoteAddr=%s, requestURI: %q",
-				d.Seconds(), remoteAddr, requestURI)
+				time.Since(startTime).Seconds(), remoteAddr, requestURI)
 			return true
 		case <-t.C:
 			timerpool.Put(t)
diff --git a/app/vmselect/prometheus/prometheus.go b/app/vmselect/prometheus/prometheus.go
index e98591659..f510517f9 100644
--- a/app/vmselect/prometheus/prometheus.go
+++ b/app/vmselect/prometheus/prometheus.go
@@ -13,17 +13,18 @@ import (
 	"sync/atomic"
 	"time"
 
-	"github.com/VictoriaMetrics/VictoriaMetrics/app/vmselect/bufferedwriter"
 	"github.com/VictoriaMetrics/VictoriaMetrics/app/vmselect/netstorage"
 	"github.com/VictoriaMetrics/VictoriaMetrics/app/vmselect/promql"
 	"github.com/VictoriaMetrics/VictoriaMetrics/app/vmselect/querystats"
 	"github.com/VictoriaMetrics/VictoriaMetrics/app/vmselect/searchutils"
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/auth"
+	"github.com/VictoriaMetrics/VictoriaMetrics/lib/bufferedwriter"
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/encoding"
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/fasttime"
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/flagutil"
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/httpserver"
+	"github.com/VictoriaMetrics/VictoriaMetrics/lib/httputils"
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/logger"
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/querytracer"
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/storage"
@@ -97,7 +98,7 @@ func FederateHandler(startTime time.Time, at *auth.Token, w http.ResponseWriter,
 		cp.start = cp.end - lookbackDelta
 	}
 	sq := storage.NewSearchQuery(at.AccountID, at.ProjectID, cp.start, cp.end, cp.filterss, *maxFederateSeries)
-	denyPartialResponse := searchutils.GetDenyPartialResponse(r)
+	denyPartialResponse := httputils.GetDenyPartialResponse(r)
 	rss, isPartial, err := netstorage.ProcessSearchQuery(nil, denyPartialResponse, sq, cp.deadline)
 	if err != nil {
 		return fmt.Errorf("cannot fetch data for %q: %w", sq, err)
@@ -140,7 +141,7 @@ func ExportCSVHandler(startTime time.Time, at *auth.Token, w http.ResponseWriter
 		return fmt.Errorf("missing `format` arg; see https://docs.victoriametrics.com/#how-to-export-csv-data")
 	}
 	fieldNames := strings.Split(format, ",")
-	reduceMemUsage := searchutils.GetBool(r, "reduce_mem_usage")
+	reduceMemUsage := httputils.GetBool(r, "reduce_mem_usage")
 
 	sq := storage.NewSearchQuery(at.AccountID, at.ProjectID, cp.start, cp.end, cp.filterss, *maxExportSeries)
 	w.Header().Set("Content-Type", "text/csv; charset=utf-8")
@@ -280,7 +281,7 @@ func ExportHandler(startTime time.Time, at *auth.Token, w http.ResponseWriter, r
 	}
 	format := r.FormValue("format")
 	maxRowsPerLine := int(fastfloat.ParseInt64BestEffort(r.FormValue("max_rows_per_line")))
-	reduceMemUsage := searchutils.GetBool(r, "reduce_mem_usage")
+	reduceMemUsage := httputils.GetBool(r, "reduce_mem_usage")
 	if err := exportHandler(nil, at, w, cp, format, maxRowsPerLine, reduceMemUsage); err != nil {
 		return fmt.Errorf("error when exporting data on the time range (start=%d, end=%d): %w", cp.start, cp.end, err)
 	}
@@ -525,12 +526,12 @@ var httpClient = &http.Client{
 // Tenants processes /admin/tenants request.
 func Tenants(qt *querytracer.Tracer, startTime time.Time, w http.ResponseWriter, r *http.Request) error {
 	deadline := searchutils.GetDeadlineForStatusRequest(r, startTime)
-	start, err := searchutils.GetTime(r, "start", 0)
+	start, err := httputils.GetTime(r, "start", 0)
 	if err != nil {
 		return err
 	}
 	ct := startTime.UnixNano() / 1e6
-	end, err := searchutils.GetTime(r, "end", ct)
+	end, err := httputils.GetTime(r, "end", ct)
 	if err != nil {
 		return err
 	}
@@ -562,11 +563,11 @@ func LabelValuesHandler(qt *querytracer.Tracer, startTime time.Time, at *auth.To
 	if err != nil {
 		return err
 	}
-	limit, err := searchutils.GetInt(r, "limit")
+	limit, err := httputils.GetInt(r, "limit")
 	if err != nil {
 		return err
 	}
-	denyPartialResponse := searchutils.GetDenyPartialResponse(r)
+	denyPartialResponse := httputils.GetDenyPartialResponse(r)
 	sq := storage.NewSearchQuery(at.AccountID, at.ProjectID, cp.start, cp.end, cp.filterss, *maxUniqueTimeseries)
 	labelValues, isPartial, err := netstorage.LabelValues(qt, denyPartialResponse, labelName, sq, limit, cp.deadline)
 	if err != nil {
@@ -630,7 +631,7 @@ func TSDBStatusHandler(qt *querytracer.Tracer, startTime time.Time, at *auth.Tok
 		}
 		topN = n
 	}
-	denyPartialResponse := searchutils.GetDenyPartialResponse(r)
+	denyPartialResponse := httputils.GetDenyPartialResponse(r)
 	start := int64(date*secsPerDay) * 1000
 	end := int64((date+1)*secsPerDay)*1000 - 1
 	sq := storage.NewSearchQuery(at.AccountID, at.ProjectID, start, end, cp.filterss, *maxTSDBStatusSeries)
@@ -661,11 +662,11 @@ func LabelsHandler(qt *querytracer.Tracer, startTime time.Time, at *auth.Token,
 	if err != nil {
 		return err
 	}
-	limit, err := searchutils.GetInt(r, "limit")
+	limit, err := httputils.GetInt(r, "limit")
 	if err != nil {
 		return err
 	}
-	denyPartialResponse := searchutils.GetDenyPartialResponse(r)
+	denyPartialResponse := httputils.GetDenyPartialResponse(r)
 	sq := storage.NewSearchQuery(at.AccountID, at.ProjectID, cp.start, cp.end, cp.filterss, *maxUniqueTimeseries)
 	labels, isPartial, err := netstorage.LabelNames(qt, denyPartialResponse, sq, limit, cp.deadline)
 	if err != nil {
@@ -689,7 +690,7 @@ func SeriesCountHandler(startTime time.Time, at *auth.Token, w http.ResponseWrit
 	defer seriesCountDuration.UpdateDuration(startTime)
 
 	deadline := searchutils.GetDeadlineForStatusRequest(r, startTime)
-	denyPartialResponse := searchutils.GetDenyPartialResponse(r)
+	denyPartialResponse := httputils.GetDenyPartialResponse(r)
 	n, isPartial, err := netstorage.SeriesCount(nil, at.AccountID, at.ProjectID, denyPartialResponse, deadline)
 	if err != nil {
 		return fmt.Errorf("cannot obtain series count: %w", err)
@@ -722,13 +723,13 @@ func SeriesHandler(qt *querytracer.Tracer, startTime time.Time, at *auth.Token,
 	if err != nil {
 		return err
 	}
-	limit, err := searchutils.GetInt(r, "limit")
+	limit, err := httputils.GetInt(r, "limit")
 	if err != nil {
 		return err
 	}
 
 	sq := storage.NewSearchQuery(at.AccountID, at.ProjectID, cp.start, cp.end, cp.filterss, *maxSeriesLimit)
-	denyPartialResponse := searchutils.GetDenyPartialResponse(r)
+	denyPartialResponse := httputils.GetDenyPartialResponse(r)
 	metricNames, isPartial, err := netstorage.SearchMetricNames(qt, denyPartialResponse, sq, cp.deadline)
 	if err != nil {
 		return fmt.Errorf("cannot fetch time series for %q: %w", sq, err)
@@ -759,12 +760,12 @@ func QueryHandler(qt *querytracer.Tracer, startTime time.Time, at *auth.Token, w
 
 	ct := startTime.UnixNano() / 1e6
 	deadline := searchutils.GetDeadlineForQuery(r, startTime)
-	mayCache := !searchutils.GetBool(r, "nocache")
+	mayCache := !httputils.GetBool(r, "nocache")
 	query := r.FormValue("query")
 	if len(query) == 0 {
 		return fmt.Errorf("missing `query` arg")
 	}
-	start, err := searchutils.GetTime(r, "time", ct)
+	start, err := httputils.GetTime(r, "time", ct)
 	if err != nil {
 		return err
 	}
@@ -772,7 +773,7 @@ func QueryHandler(qt *querytracer.Tracer, startTime time.Time, at *auth.Token, w
 	if err != nil {
 		return err
 	}
-	step, err := searchutils.GetDuration(r, "step", lookbackDelta)
+	step, err := httputils.GetDuration(r, "step", lookbackDelta)
 	if err != nil {
 		return err
 	}
@@ -836,7 +837,7 @@ func QueryHandler(qt *querytracer.Tracer, startTime time.Time, at *auth.Token, w
 	if err != nil {
 		return err
 	}
-	if !searchutils.GetBool(r, "nocache") && ct-start < queryOffset && start-ct < queryOffset {
+	if !httputils.GetBool(r, "nocache") && ct-start < queryOffset && start-ct < queryOffset {
 		// Adjust start time only if `nocache` arg isn't set.
 		// See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/241
 		startPrev := start
@@ -863,7 +864,7 @@ func QueryHandler(qt *querytracer.Tracer, startTime time.Time, at *auth.Token, w
 			return httpserver.GetRequestURI(r)
 		},
 
-		DenyPartialResponse: searchutils.GetDenyPartialResponse(r),
+		DenyPartialResponse: httputils.GetDenyPartialResponse(r),
 		QueryStats:          qs,
 	}
 	result, err := promql.Exec(qt, ec, query, true)
@@ -910,15 +911,15 @@ func QueryRangeHandler(qt *querytracer.Tracer, startTime time.Time, at *auth.Tok
 	if len(query) == 0 {
 		return fmt.Errorf("missing `query` arg")
 	}
-	start, err := searchutils.GetTime(r, "start", ct-defaultStep)
+	start, err := httputils.GetTime(r, "start", ct-defaultStep)
 	if err != nil {
 		return err
 	}
-	end, err := searchutils.GetTime(r, "end", ct)
+	end, err := httputils.GetTime(r, "end", ct)
 	if err != nil {
 		return err
 	}
-	step, err := searchutils.GetDuration(r, "step", defaultStep)
+	step, err := httputils.GetDuration(r, "step", defaultStep)
 	if err != nil {
 		return err
 	}
@@ -935,7 +936,7 @@ func QueryRangeHandler(qt *querytracer.Tracer, startTime time.Time, at *auth.Tok
 func queryRangeHandler(qt *querytracer.Tracer, startTime time.Time, at *auth.Token, w http.ResponseWriter, query string,
 	start, end, step int64, r *http.Request, ct int64, etfs [][]storage.TagFilter) error {
 	deadline := searchutils.GetDeadlineForQuery(r, startTime)
-	mayCache := !searchutils.GetBool(r, "nocache")
+	mayCache := !httputils.GetBool(r, "nocache")
 	lookbackDelta, err := getMaxLookback(r)
 	if err != nil {
 		return err
@@ -973,7 +974,7 @@ func queryRangeHandler(qt *querytracer.Tracer, startTime time.Time, at *auth.Tok
 			return httpserver.GetRequestURI(r)
 		},
 
-		DenyPartialResponse: searchutils.GetDenyPartialResponse(r),
+		DenyPartialResponse: httputils.GetDenyPartialResponse(r),
 		QueryStats:          qs,
 	}
 	result, err := promql.Exec(qt, ec, query, false)
@@ -1087,13 +1088,13 @@ func getMaxLookback(r *http.Request) (int64, error) {
 	if d == 0 {
 		d = maxStalenessInterval.Milliseconds()
 	}
-	maxLookback, err := searchutils.GetDuration(r, "max_lookback", d)
+	maxLookback, err := httputils.GetDuration(r, "max_lookback", d)
 	if err != nil {
 		return 0, err
 	}
 	d = maxLookback
 	if *setLookbackToStep {
-		step, err := searchutils.GetDuration(r, "step", d)
+		step, err := httputils.GetDuration(r, "step", d)
 		if err != nil {
 			return 0, err
 		}
@@ -1133,7 +1134,7 @@ func getLatencyOffsetMilliseconds(r *http.Request) (int64, error) {
 		// See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2061#issuecomment-1299109836
 		d = 0
 	}
-	return searchutils.GetDuration(r, "latency_offset", d)
+	return httputils.GetDuration(r, "latency_offset", d)
 }
 
 // QueryStatsHandler returns query stats at `/api/v1/status/top_queries`
@@ -1149,7 +1150,7 @@ func QueryStatsHandler(startTime time.Time, at *auth.Token, w http.ResponseWrite
 		}
 		topN = n
 	}
-	maxLifetimeMsecs, err := searchutils.GetDuration(r, "maxLifetime", 10*60*1000)
+	maxLifetimeMsecs, err := httputils.GetDuration(r, "maxLifetime", 10*60*1000)
 	if err != nil {
 		return fmt.Errorf("cannot parse `maxLifetime` arg: %w", err)
 	}
@@ -1223,12 +1224,12 @@ func getCommonParamsWithDefaultDuration(r *http.Request, startTime time.Time, re
 // - extra_filters[]
 func getCommonParams(r *http.Request, startTime time.Time, requireNonEmptyMatch bool) (*commonParams, error) {
 	deadline := searchutils.GetDeadlineForQuery(r, startTime)
-	start, err := searchutils.GetTime(r, "start", 0)
+	start, err := httputils.GetTime(r, "start", 0)
 	if err != nil {
 		return nil, err
 	}
 	ct := startTime.UnixNano() / 1e6
-	end, err := searchutils.GetTime(r, "end", ct)
+	end, err := httputils.GetTime(r, "end", ct)
 	if err != nil {
 		return nil, err
 	}
diff --git a/app/vmselect/searchutils/searchutils.go b/app/vmselect/searchutils/searchutils.go
index eca5f3df7..bbf5c6d1c 100644
--- a/app/vmselect/searchutils/searchutils.go
+++ b/app/vmselect/searchutils/searchutils.go
@@ -3,14 +3,12 @@ package searchutils
 import (
 	"flag"
 	"fmt"
-	"math"
 	"net/http"
-	"strconv"
 	"strings"
 	"time"
 
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/fasttime"
-	"github.com/VictoriaMetrics/VictoriaMetrics/lib/promutils"
+	"github.com/VictoriaMetrics/VictoriaMetrics/lib/httputils"
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/storage"
 	"github.com/VictoriaMetrics/metricsql"
 )
@@ -19,100 +17,11 @@ var (
 	maxExportDuration        = flag.Duration("search.maxExportDuration", time.Hour*24*30, "The maximum duration for /api/v1/export call")
 	maxQueryDuration         = flag.Duration("search.maxQueryDuration", time.Second*30, "The maximum duration for query execution")
 	maxStatusRequestDuration = flag.Duration("search.maxStatusRequestDuration", time.Minute*5, "The maximum duration for /api/v1/status/* requests")
-	denyPartialResponse      = flag.Bool("search.denyPartialResponse", false, "Whether to deny partial responses if a part of -storageNode instances fail to perform queries; "+
-		"this trades availability over consistency; see also -search.maxQueryDuration")
 )
 
-func roundToSeconds(ms int64) int64 {
-	return ms - ms%1000
-}
-
-// GetInt returns integer value from the given argKey.
-func GetInt(r *http.Request, argKey string) (int, error) {
-	argValue := r.FormValue(argKey)
-	if len(argValue) == 0 {
-		return 0, nil
-	}
-	n, err := strconv.Atoi(argValue)
-	if err != nil {
-		return 0, fmt.Errorf("cannot parse integer %q=%q: %w", argKey, argValue, err)
-	}
-	return n, nil
-}
-
-// GetTime returns time from the given argKey query arg.
-//
-// If argKey is missing in r, then defaultMs rounded to seconds is returned.
-// The rounding is needed in order to align query results in Grafana
-// executed at different times. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/720
-func GetTime(r *http.Request, argKey string, defaultMs int64) (int64, error) {
-	argValue := r.FormValue(argKey)
-	if len(argValue) == 0 {
-		return roundToSeconds(defaultMs), nil
-	}
-	// Handle Prometheus'-provided minTime and maxTime.
-	// See https://github.com/prometheus/client_golang/issues/614
-	switch argValue {
-	case prometheusMinTimeFormatted:
-		return minTimeMsecs, nil
-	case prometheusMaxTimeFormatted:
-		return maxTimeMsecs, nil
-	}
-	// Parse argValue
-	secs, err := promutils.ParseTime(argValue)
-	if err != nil {
-		return 0, fmt.Errorf("cannot parse %s=%s: %w", argKey, argValue, err)
-	}
-	msecs := int64(secs * 1e3)
-	if msecs < minTimeMsecs {
-		msecs = 0
-	}
-	if msecs > maxTimeMsecs {
-		msecs = maxTimeMsecs
-	}
-	return msecs, nil
-}
-
-var (
-	// These constants were obtained from https://github.com/prometheus/prometheus/blob/91d7175eaac18b00e370965f3a8186cc40bf9f55/web/api/v1/api.go#L442
-	// See https://github.com/prometheus/client_golang/issues/614 for details.
-	prometheusMinTimeFormatted = time.Unix(math.MinInt64/1000+62135596801, 0).UTC().Format(time.RFC3339Nano)
-	prometheusMaxTimeFormatted = time.Unix(math.MaxInt64/1000-62135596801, 999999999).UTC().Format(time.RFC3339Nano)
-)
-
-const (
-	// These values prevent from overflow when storing msec-precision time in int64.
-	minTimeMsecs = 0 // use 0 instead of `int64(-1<<63) / 1e6` because the storage engine doesn't actually support negative time
-	maxTimeMsecs = int64(1<<63-1) / 1e6
-)
-
-// GetDuration returns duration from the given argKey query arg.
-func GetDuration(r *http.Request, argKey string, defaultValue int64) (int64, error) {
-	argValue := r.FormValue(argKey)
-	if len(argValue) == 0 {
-		return defaultValue, nil
-	}
-	secs, err := strconv.ParseFloat(argValue, 64)
-	if err != nil {
-		// Try parsing string format
-		d, err := promutils.ParseDuration(argValue)
-		if err != nil {
-			return 0, fmt.Errorf("cannot parse %q=%q: %w", argKey, argValue, err)
-		}
-		secs = d.Seconds()
-	}
-	msecs := int64(secs * 1e3)
-	if msecs <= 0 || msecs > maxDurationMsecs {
-		return 0, fmt.Errorf("%q=%dms is out of allowed range [%d ... %d]", argKey, msecs, 0, int64(maxDurationMsecs))
-	}
-	return msecs, nil
-}
-
-const maxDurationMsecs = 100 * 365 * 24 * 3600 * 1000
-
 // GetMaxQueryDuration returns the maximum duration for query from r.
 func GetMaxQueryDuration(r *http.Request) time.Duration {
-	dms, err := GetDuration(r, "timeout", 0)
+	dms, err := httputils.GetDuration(r, "timeout", 0)
 	if err != nil {
 		dms = 0
 	}
@@ -142,7 +51,7 @@ func GetDeadlineForExport(r *http.Request, startTime time.Time) Deadline {
 }
 
 func getDeadlineWithMaxDuration(r *http.Request, startTime time.Time, dMax int64, flagHint string) Deadline {
-	d, err := GetDuration(r, "timeout", 0)
+	d, err := httputils.GetDuration(r, "timeout", 0)
 	if err != nil {
 		d = 0
 	}
@@ -153,28 +62,6 @@ func getDeadlineWithMaxDuration(r *http.Request, startTime time.Time, dMax int64
 	return NewDeadline(startTime, timeout, flagHint)
 }
 
-// GetBool returns boolean value from the given argKey query arg.
-func GetBool(r *http.Request, argKey string) bool {
-	argValue := r.FormValue(argKey)
-	switch strings.ToLower(argValue) {
-	case "", "0", "f", "false", "no":
-		return false
-	default:
-		return true
-	}
-}
-
-// GetDenyPartialResponse returns whether partial responses are denied.
-func GetDenyPartialResponse(r *http.Request) bool {
-	if *denyPartialResponse {
-		return true
-	}
-	if r == nil {
-		return false
-	}
-	return GetBool(r, "deny_partial_response")
-}
-
 // Deadline contains deadline with the corresponding timeout for pretty error messages.
 type Deadline struct {
 	deadline uint64
diff --git a/app/vmselect/searchutils/searchutils_test.go b/app/vmselect/searchutils/searchutils_test.go
index 73544392f..b763b8b76 100644
--- a/app/vmselect/searchutils/searchutils_test.go
+++ b/app/vmselect/searchutils/searchutils_test.go
@@ -11,149 +11,6 @@ import (
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/storage"
 )
 
-func TestGetDurationSuccess(t *testing.T) {
-	f := func(s string, dExpected int64) {
-		t.Helper()
-		urlStr := fmt.Sprintf("http://foo.bar/baz?s=%s", url.QueryEscape(s))
-		r, err := http.NewRequest(http.MethodGet, urlStr, nil)
-		if err != nil {
-			t.Fatalf("unexpected error in NewRequest: %s", err)
-		}
-
-		// Verify defaultValue
-		d, err := GetDuration(r, "foo", 123456)
-		if err != nil {
-			t.Fatalf("unexpected error when obtaining default time from GetDuration(%q): %s", s, err)
-		}
-		if d != 123456 {
-			t.Fatalf("unexpected default value for GetDuration(%q); got %d; want %d", s, d, 123456)
-		}
-
-		// Verify dExpected
-		d, err = GetDuration(r, "s", 123)
-		if err != nil {
-			t.Fatalf("unexpected error in GetDuration(%q): %s", s, err)
-		}
-		if d != dExpected {
-			t.Fatalf("unexpected timestamp for GetDuration(%q); got %d; want %d", s, d, dExpected)
-		}
-	}
-
-	f("1.234", 1234)
-	f("1.23ms", 1)
-	f("1.23s", 1230)
-	f("2s56ms", 2056)
-	f("2s-5ms", 1995)
-	f("5m3.5s", 303500)
-	f("2h", 7200000)
-	f("1d", 24*3600*1000)
-	f("7d5h4m3s534ms", 623043534)
-}
-
-func TestGetDurationError(t *testing.T) {
-	f := func(s string) {
-		t.Helper()
-		urlStr := fmt.Sprintf("http://foo.bar/baz?s=%s", url.QueryEscape(s))
-		r, err := http.NewRequest(http.MethodGet, urlStr, nil)
-		if err != nil {
-			t.Fatalf("unexpected error in NewRequest: %s", err)
-		}
-
-		if _, err := GetDuration(r, "s", 123); err == nil {
-			t.Fatalf("expecting non-nil error in GetDuration(%q)", s)
-		}
-	}
-
-	// Negative durations aren't supported
-	f("-1.234")
-
-	// Invalid duration
-	f("foo")
-
-	// Invalid suffix
-	f("1md")
-}
-
-func TestGetTimeSuccess(t *testing.T) {
-	f := func(s string, timestampExpected int64) {
-		t.Helper()
-		urlStr := fmt.Sprintf("http://foo.bar/baz?s=%s", url.QueryEscape(s))
-		r, err := http.NewRequest(http.MethodGet, urlStr, nil)
-		if err != nil {
-			t.Fatalf("unexpected error in NewRequest: %s", err)
-		}
-
-		// Verify defaultValue
-		ts, err := GetTime(r, "foo", 123456)
-		if err != nil {
-			t.Fatalf("unexpected error when obtaining default time from GetTime(%q): %s", s, err)
-		}
-		if ts != 123000 {
-			t.Fatalf("unexpected default value for GetTime(%q); got %d; want %d", s, ts, 123000)
-		}
-
-		// Verify timestampExpected
-		ts, err = GetTime(r, "s", 123)
-		if err != nil {
-			t.Fatalf("unexpected error in GetTime(%q): %s", s, err)
-		}
-		if ts != timestampExpected {
-			t.Fatalf("unexpected timestamp for GetTime(%q); got %d; want %d", s, ts, timestampExpected)
-		}
-	}
-
-	f("2019", 1546300800000)
-	f("2019-01", 1546300800000)
-	f("2019-02", 1548979200000)
-	f("2019-02-01", 1548979200000)
-	f("2019-02-02", 1549065600000)
-	f("2019-02-02T00", 1549065600000)
-	f("2019-02-02T01", 1549069200000)
-	f("2019-02-02T01:00", 1549069200000)
-	f("2019-02-02T01:01", 1549069260000)
-	f("2019-02-02T01:01:00", 1549069260000)
-	f("2019-02-02T01:01:01", 1549069261000)
-	f("2019-07-07T20:01:02Z", 1562529662000)
-	f("2019-07-07T20:47:40+03:00", 1562521660000)
-	f("-292273086-05-16T16:47:06Z", minTimeMsecs)
-	f("292277025-08-18T07:12:54.999999999Z", maxTimeMsecs)
-	f("1562529662.324", 1562529662324)
-	f("-9223372036.854", minTimeMsecs)
-	f("-9223372036.855", minTimeMsecs)
-	f("9223372036.855", maxTimeMsecs)
-}
-
-func TestGetTimeError(t *testing.T) {
-	f := func(s string) {
-		t.Helper()
-		urlStr := fmt.Sprintf("http://foo.bar/baz?s=%s", url.QueryEscape(s))
-		r, err := http.NewRequest(http.MethodGet, urlStr, nil)
-		if err != nil {
-			t.Fatalf("unexpected error in NewRequest: %s", err)
-		}
-
-		if _, err := GetTime(r, "s", 123); err == nil {
-			t.Fatalf("expecting non-nil error in GetTime(%q)", s)
-		}
-	}
-
-	f("foo")
-	f("foo1")
-	f("1245-5")
-	f("2022-x7")
-	f("2022-02-x7")
-	f("2022-02-02Tx7")
-	f("2022-02-02T00:x7")
-	f("2022-02-02T00:00:x7")
-	f("2022-02-02T00:00:00a")
-	f("2019-07-07T20:01:02Zisdf")
-	f("2019-07-07T20:47:40+03:00123")
-	f("-292273086-05-16T16:47:07Z")
-	f("292277025-08-18T07:12:54.999999998Z")
-	f("123md")
-	f("-12.3md")
-}
-
 func TestGetExtraTagFilters(t *testing.T) {
 	httpReqWithForm := func(qs string) *http.Request {
 		q, err := url.ParseQuery(qs)
diff --git a/app/vmselect/bufferedwriter/bufferedwriter.go b/lib/bufferedwriter/bufferedwriter.go
similarity index 100%
rename from app/vmselect/bufferedwriter/bufferedwriter.go
rename to lib/bufferedwriter/bufferedwriter.go
diff --git a/lib/httputils/bool.go b/lib/httputils/bool.go
new file mode 100644
index 000000000..321ceb80a
--- /dev/null
+++ b/lib/httputils/bool.go
@@ -0,0 +1,34 @@
+package httputils
+
+import (
+	"flag"
+	"net/http"
+	"strings"
+)
+
+var (
+	denyPartialResponse = flag.Bool("search.denyPartialResponse", false, "Whether to deny partial responses if a part of -storageNode instances fail to perform queries; "+
+		"this trades availability over consistency; see also -search.maxQueryDuration")
+)
+
+// GetBool returns boolean value from the given argKey query arg.
+func GetBool(r *http.Request, argKey string) bool {
+	argValue := r.FormValue(argKey)
+	switch strings.ToLower(argValue) {
+	case "", "0", "f", "false", "no":
+		return false
+	default:
+		return true
+	}
+}
+
+// GetDenyPartialResponse returns whether partial responses are denied.
+func GetDenyPartialResponse(r *http.Request) bool {
+	if *denyPartialResponse {
+		return true
+	}
+	if r == nil {
+		return false
+	}
+	return GetBool(r, "deny_partial_response")
+}
diff --git a/lib/httputils/duration.go b/lib/httputils/duration.go
new file mode 100644
index 000000000..89d31feb5
--- /dev/null
+++ b/lib/httputils/duration.go
@@ -0,0 +1,33 @@
+package httputils
+
+import (
+	"fmt"
+	"net/http"
+	"strconv"
+
+	"github.com/VictoriaMetrics/VictoriaMetrics/lib/promutils"
+)
+
+// GetDuration returns duration in milliseconds from the given argKey query arg.
+func GetDuration(r *http.Request, argKey string, defaultValue int64) (int64, error) {
+	argValue := r.FormValue(argKey)
+	if len(argValue) == 0 {
+		return defaultValue, nil
+	}
+	secs, err := strconv.ParseFloat(argValue, 64)
+	if err != nil {
+		// Try parsing string format
+		d, err := promutils.ParseDuration(argValue)
+		if err != nil {
+			return 0, fmt.Errorf("cannot parse %q=%q: %w", argKey, argValue, err)
+		}
+		secs = d.Seconds()
+	}
+	msecs := int64(secs * 1e3)
+	if msecs <= 0 || msecs > maxDurationMsecs {
+		return 0, fmt.Errorf("%q=%dms is out of allowed range [%d ... %d]", argKey, msecs, 0, int64(maxDurationMsecs))
+	}
+	return msecs, nil
+}
+
+const maxDurationMsecs = 100 * 365 * 24 * 3600 * 1000
diff --git a/lib/httputils/duration_test.go b/lib/httputils/duration_test.go
new file mode 100644
index 000000000..7cb3dc631
--- /dev/null
+++ b/lib/httputils/duration_test.go
@@ -0,0 +1,71 @@
+package httputils
+
+import (
+	"fmt"
+	"net/http"
+	"net/url"
+	"testing"
+)
+
+func TestGetDurationSuccess(t *testing.T) {
+	f := func(s string, dExpected int64) {
+		t.Helper()
+		urlStr := fmt.Sprintf("http://foo.bar/baz?s=%s", url.QueryEscape(s))
+		r, err := http.NewRequest(http.MethodGet, urlStr, nil)
+		if err != nil {
+			t.Fatalf("unexpected error in NewRequest: %s", err)
+		}
+
+		// Verify defaultValue
+		d, err := GetDuration(r, "foo", 123456)
+		if err != nil {
+			t.Fatalf("unexpected error when obtaining default time from GetDuration(%q): %s", s, err)
+		}
+		if d != 123456 {
+			t.Fatalf("unexpected default value for GetDuration(%q); got %d; want %d", s, d, 123456)
+		}
+
+		// Verify dExpected
+		d, err = GetDuration(r, "s", 123)
+		if err != nil {
+			t.Fatalf("unexpected error in GetDuration(%q): %s", s, err)
+		}
+		if d != dExpected {
+			t.Fatalf("unexpected timestamp for GetDuration(%q); got %d; want %d", s, d, dExpected)
+		}
+	}
+
+	f("1.234", 1234)
+	f("1.23ms", 1)
+	f("1.23s", 1230)
+	f("2s56ms", 2056)
+	f("2s-5ms", 1995)
+	f("5m3.5s", 303500)
+	f("2h", 7200000)
+	f("1d", 24*3600*1000)
+	f("7d5h4m3s534ms", 623043534)
+}
+
+func TestGetDurationError(t *testing.T) {
+	f := func(s string) {
+		t.Helper()
+		urlStr := fmt.Sprintf("http://foo.bar/baz?s=%s", url.QueryEscape(s))
+		r, err := http.NewRequest(http.MethodGet, urlStr, nil)
+		if err != nil {
+			t.Fatalf("unexpected error in NewRequest: %s", err)
+		}
+
+		if _, err := GetDuration(r, "s", 123); err == nil {
+			t.Fatalf("expecting non-nil error in GetDuration(%q)", s)
+		}
+	}
+
+	// Negative durations aren't supported
+	f("-1.234")
+
+	// Invalid duration
+	f("foo")
+
+	// Invalid suffix
+	f("1md")
+}
diff --git a/lib/httputils/int.go b/lib/httputils/int.go
new file mode 100644
index 000000000..2547cbf16
--- /dev/null
+++ b/lib/httputils/int.go
@@ -0,0 +1,20 @@
+package httputils
+
+import (
+	"fmt"
+	"net/http"
+	"strconv"
+)
+
+// GetInt returns integer value from the given argKey.
+func GetInt(r *http.Request, argKey string) (int, error) {
+	argValue := r.FormValue(argKey)
+	if len(argValue) == 0 {
+		return 0, nil
+	}
+	n, err := strconv.Atoi(argValue)
+	if err != nil {
+		return 0, fmt.Errorf("cannot parse integer %q=%q: %w", argKey, argValue, err)
+	}
+	return n, nil
+}
diff --git a/lib/httputils/time.go b/lib/httputils/time.go
new file mode 100644
index 000000000..e55591251
--- /dev/null
+++ b/lib/httputils/time.go
@@ -0,0 +1,60 @@
+package httputils
+
+import (
+	"fmt"
+	"math"
+	"net/http"
+	"time"
+
+	"github.com/VictoriaMetrics/VictoriaMetrics/lib/promutils"
+)
+
+// GetTime returns time in milliseconds from the given argKey query arg.
+//
+// If argKey is missing in r, then defaultMs rounded to seconds is returned.
+// The rounding is needed in order to align query results in Grafana
+// executed at different times. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/720
+func GetTime(r *http.Request, argKey string, defaultMs int64) (int64, error) {
+	argValue := r.FormValue(argKey)
+	if len(argValue) == 0 {
+		return roundToSeconds(defaultMs), nil
+	}
+	// Handle Prometheus'-provided minTime and maxTime.
+	// See https://github.com/prometheus/client_golang/issues/614
+	switch argValue {
+	case prometheusMinTimeFormatted:
+		return minTimeMsecs, nil
+	case prometheusMaxTimeFormatted:
+		return maxTimeMsecs, nil
+	}
+	// Parse argValue
+	secs, err := promutils.ParseTime(argValue)
+	if err != nil {
+		return 0, fmt.Errorf("cannot parse %s=%s: %w", argKey, argValue, err)
+	}
+	msecs := int64(secs * 1e3)
+	if msecs < minTimeMsecs {
+		msecs = 0
+	}
+	if msecs > maxTimeMsecs {
+		msecs = maxTimeMsecs
+	}
+	return msecs, nil
+}
+
+var (
+	// These constants were obtained from https://github.com/prometheus/prometheus/blob/91d7175eaac18b00e370965f3a8186cc40bf9f55/web/api/v1/api.go#L442
+	// See https://github.com/prometheus/client_golang/issues/614 for details.
+	prometheusMinTimeFormatted = time.Unix(math.MinInt64/1000+62135596801, 0).UTC().Format(time.RFC3339Nano)
+	prometheusMaxTimeFormatted = time.Unix(math.MaxInt64/1000-62135596801, 999999999).UTC().Format(time.RFC3339Nano)
+)
+
+const (
+	// These values prevent from overflow when storing msec-precision time in int64.
+	minTimeMsecs = 0 // use 0 instead of `int64(-1<<63) / 1e6` because the storage engine doesn't actually support negative time
+	maxTimeMsecs = int64(1<<63-1) / 1e6
+)
+
+func roundToSeconds(ms int64) int64 {
+	return ms - ms%1000
+}
diff --git a/lib/httputils/time_test.go b/lib/httputils/time_test.go
new file mode 100644
index 000000000..8b5701f96
--- /dev/null
+++ b/lib/httputils/time_test.go
@@ -0,0 +1,88 @@
+package httputils
+
+import (
+	"fmt"
+	"net/http"
+	"net/url"
+	"testing"
+)
+
+func TestGetTimeSuccess(t *testing.T) {
+	f := func(s string, timestampExpected int64) {
+		t.Helper()
+		urlStr := fmt.Sprintf("http://foo.bar/baz?s=%s", url.QueryEscape(s))
+		r, err := http.NewRequest(http.MethodGet, urlStr, nil)
+		if err != nil {
+			t.Fatalf("unexpected error in NewRequest: %s", err)
+		}
+
+		// Verify defaultValue
+		ts, err := GetTime(r, "foo", 123456)
+		if err != nil {
+			t.Fatalf("unexpected error when obtaining default time from GetTime(%q): %s", s, err)
+		}
+		if ts != 123000 {
+			t.Fatalf("unexpected default value for GetTime(%q); got %d; want %d", s, ts, 123000)
+		}
+
+		// Verify timestampExpected
+		ts, err = GetTime(r, "s", 123)
+		if err != nil {
+			t.Fatalf("unexpected error in GetTime(%q): %s", s, err)
+		}
+		if ts != timestampExpected {
+			t.Fatalf("unexpected timestamp for GetTime(%q); got %d; want %d", s, ts, timestampExpected)
+		}
+	}
+
+	f("2019", 1546300800000)
+	f("2019-01", 1546300800000)
+	f("2019-02", 1548979200000)
+	f("2019-02-01", 1548979200000)
+	f("2019-02-02", 1549065600000)
+	f("2019-02-02T00", 1549065600000)
+	f("2019-02-02T01", 1549069200000)
+	f("2019-02-02T01:00", 1549069200000)
+	f("2019-02-02T01:01", 1549069260000)
+	f("2019-02-02T01:01:00", 1549069260000)
+	f("2019-02-02T01:01:01", 1549069261000)
+	f("2019-07-07T20:01:02Z", 1562529662000)
+	f("2019-07-07T20:47:40+03:00", 1562521660000)
+	f("-292273086-05-16T16:47:06Z", minTimeMsecs)
+	f("292277025-08-18T07:12:54.999999999Z", maxTimeMsecs)
+	f("1562529662.324", 1562529662324)
+	f("-9223372036.854", minTimeMsecs)
+	f("-9223372036.855", minTimeMsecs)
+	f("9223372036.855", maxTimeMsecs)
+}
+
+func TestGetTimeError(t *testing.T) {
+	f := func(s string) {
+		t.Helper()
+		urlStr := fmt.Sprintf("http://foo.bar/baz?s=%s", url.QueryEscape(s))
+		r, err := http.NewRequest(http.MethodGet, urlStr, nil)
+		if err != nil {
+			t.Fatalf("unexpected error in NewRequest: %s", err)
+		}
+
+		if _, err := GetTime(r, "s", 123); err == nil {
+			t.Fatalf("expecting non-nil error in GetTime(%q)", s)
+		}
+	}
+
+	f("foo")
+	f("foo1")
+	f("1245-5")
+	f("2022-x7")
+	f("2022-02-x7")
+	f("2022-02-02Tx7")
+	f("2022-02-02T00:x7")
+	f("2022-02-02T00:00:x7")
+	f("2022-02-02T00:00:00a")
+	f("2019-07-07T20:01:02Zisdf")
+	f("2019-07-07T20:47:40+03:00123")
+	f("-292273086-05-16T16:47:07Z")
+	f("292277025-08-18T07:12:54.999999998Z")
+	f("123md")
+	f("-12.3md")
+}