AdGuardHome/internal/stats/http.go

145 lines
3.8 KiB
Go

// HTTP request handlers for accessing statistics data and configuration settings
package stats
import (
"encoding/json"
"fmt"
"net/http"
"time"
"github.com/AdguardTeam/golibs/log"
)
func httpError(r *http.Request, w http.ResponseWriter, code int, format string, args ...interface{}) {
text := fmt.Sprintf(format, args...)
log.Info("Stats: %s %s: %s", r.Method, r.URL, text)
http.Error(w, text, code)
}
// topAddrs is an alias for the types of the TopFoo fields of statsResponse.
// The key is either a client's address or a requested address.
type topAddrs = map[string]uint64
// statsResponse is a response for getting statistics.
type statsResponse struct {
TimeUnits string `json:"time_units"`
NumDNSQueries uint64 `json:"num_dns_queries"`
NumBlockedFiltering uint64 `json:"num_blocked_filtering"`
NumReplacedSafebrowsing uint64 `json:"num_replaced_safebrowsing"`
NumReplacedSafesearch uint64 `json:"num_replaced_safesearch"`
NumReplacedParental uint64 `json:"num_replaced_parental"`
AvgProcessingTime float64 `json:"avg_processing_time"`
TopQueried []topAddrs `json:"top_queried_domains"`
TopClients []topAddrs `json:"top_clients"`
TopBlocked []topAddrs `json:"top_blocked_domains"`
DNSQueries []uint64 `json:"dns_queries"`
BlockedFiltering []uint64 `json:"blocked_filtering"`
ReplacedSafebrowsing []uint64 `json:"replaced_safebrowsing"`
ReplacedParental []uint64 `json:"replaced_parental"`
}
// handleStats is a handler for getting statistics.
func (s *statsCtx) handleStats(w http.ResponseWriter, r *http.Request) {
start := time.Now()
var resp statsResponse
if s.conf.limit == 0 {
resp = statsResponse{
TimeUnits: "days",
TopBlocked: []topAddrs{},
TopClients: []topAddrs{},
TopQueried: []topAddrs{},
BlockedFiltering: []uint64{},
DNSQueries: []uint64{},
ReplacedParental: []uint64{},
ReplacedSafebrowsing: []uint64{},
}
} else {
var ok bool
resp, ok = s.getData()
log.Debug("stats: prepared data in %v", time.Since(start))
if !ok {
httpError(r, w, http.StatusInternalServerError, "Couldn't get statistics data")
return
}
}
w.Header().Set("Content-Type", "application/json")
err := json.NewEncoder(w).Encode(resp)
if err != nil {
httpError(r, w, http.StatusInternalServerError, "json encode: %s", err)
return
}
}
type config struct {
IntervalDays uint32 `json:"interval"`
}
// Get configuration
func (s *statsCtx) handleStatsInfo(w http.ResponseWriter, r *http.Request) {
resp := config{}
resp.IntervalDays = s.conf.limit / 24
data, err := json.Marshal(resp)
if err != nil {
httpError(r, w, http.StatusInternalServerError, "json encode: %s", err)
return
}
w.Header().Set("Content-Type", "application/json")
_, err = w.Write(data)
if err != nil {
httpError(r, w, http.StatusInternalServerError, "http write: %s", err)
}
}
// Set configuration
func (s *statsCtx) handleStatsConfig(w http.ResponseWriter, r *http.Request) {
reqData := config{}
err := json.NewDecoder(r.Body).Decode(&reqData)
if err != nil {
httpError(r, w, http.StatusBadRequest, "json decode: %s", err)
return
}
if !checkInterval(reqData.IntervalDays) {
httpError(r, w, http.StatusBadRequest, "Unsupported interval")
return
}
s.setLimit(int(reqData.IntervalDays))
s.conf.ConfigModified()
}
// Reset data
func (s *statsCtx) handleStatsReset(w http.ResponseWriter, r *http.Request) {
s.clear()
}
// Register web handlers
func (s *statsCtx) initWeb() {
if s.conf.HTTPRegister == nil {
return
}
s.conf.HTTPRegister(http.MethodGet, "/control/stats", s.handleStats)
s.conf.HTTPRegister(http.MethodPost, "/control/stats_reset", s.handleStatsReset)
s.conf.HTTPRegister(http.MethodPost, "/control/stats_config", s.handleStatsConfig)
s.conf.HTTPRegister(http.MethodGet, "/control/stats_info", s.handleStatsInfo)
}