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info_handlers.go
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/
info_handlers.go
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package http
import (
"encoding/json"
"fmt"
"net/http"
"time"
"github.com/ansel1/merry"
uuid "github.com/satori/go.uuid"
"github.com/go-graphite/carbonapi/carbonapipb"
"github.com/go-graphite/carbonapi/cmd/carbonapi/config"
utilctx "github.com/go-graphite/carbonapi/util/ctx"
"github.com/lomik/zapwriter"
)
func infoHandler(w http.ResponseWriter, r *http.Request) {
t0 := time.Now()
uuid := uuid.NewV4()
// TODO: Migrate to context.WithTimeout
// ctx, _ := context.WithTimeout(context.TODO(), config.Config.ZipperTimeout)
ctx := utilctx.SetUUID(r.Context(), uuid.String())
username, _, _ := r.BasicAuth()
srcIP, srcPort := splitRemoteAddr(r.RemoteAddr)
format, ok, formatRaw := getFormat(r, jsonFormat)
requestHeaders := utilctx.GetLogHeaders(ctx)
accessLogger := zapwriter.Logger("access")
var accessLogDetails = carbonapipb.AccessLogDetails{
Handler: "info",
Username: username,
CarbonapiUUID: uuid.String(),
URL: r.URL.RequestURI(),
PeerIP: srcIP,
PeerPort: srcPort,
Host: r.Host,
Referer: r.Referer(),
Format: formatRaw,
URI: r.RequestURI,
RequestHeaders: requestHeaders,
}
logAsError := false
defer func() {
deferredAccessLogging(accessLogger, &accessLogDetails, t0, logAsError)
}()
if !ok || !format.ValidFindFormat() {
http.Error(w, "unsupported format: "+formatRaw, http.StatusBadRequest)
accessLogDetails.HTTPCode = http.StatusBadRequest
accessLogDetails.Reason = "unsupported format: " + formatRaw
logAsError = true
return
}
query := r.Form["target"]
if len(query) == 0 {
http.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest)
accessLogDetails.HTTPCode = http.StatusBadRequest
accessLogDetails.Reason = "no target specified"
logAsError = true
return
}
data, stats, err := config.Config.ZipperInstance.Info(ctx, query)
if stats != nil {
accessLogDetails.ZipperRequests = stats.ZipperRequests
accessLogDetails.TotalMetricsCount += stats.TotalMetricsCount
}
if err != nil {
http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
accessLogDetails.HTTPCode = http.StatusInternalServerError
accessLogDetails.Reason = err.Error()
logAsError = true
return
}
var b []byte
var err2 error
switch format {
case jsonFormat:
b, err2 = json.Marshal(data)
case protoV3Format, protoV2Format:
err2 = fmt.Errorf("not implemented yet")
default:
err2 = fmt.Errorf("unknown format %v", format)
}
err = merry.Wrap(err2)
if err != nil {
http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
accessLogDetails.HTTPCode = http.StatusInternalServerError
accessLogDetails.Reason = err.Error()
logAsError = true
return
}
w.Header().Set(ctxHeaderUUID, uuid.String())
_, _ = w.Write(b)
accessLogDetails.Runtime = time.Since(t0).Seconds()
accessLogDetails.HTTPCode = http.StatusOK
}