/
serialize.go
78 lines (63 loc) · 1.87 KB
/
serialize.go
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package queryrange
import (
"net/http"
"github.com/opentracing/opentracing-go"
"github.com/grafana/loki/v3/pkg/loghttp"
"github.com/grafana/loki/v3/pkg/querier/queryrange/queryrangebase"
"github.com/grafana/loki/v3/pkg/util/httpreq"
serverutil "github.com/grafana/loki/v3/pkg/util/server"
)
type serializeRoundTripper struct {
codec queryrangebase.Codec
next queryrangebase.Handler
}
func NewSerializeRoundTripper(next queryrangebase.Handler, codec queryrangebase.Codec) http.RoundTripper {
return &serializeRoundTripper{
next: next,
codec: codec,
}
}
func (rt *serializeRoundTripper) RoundTrip(r *http.Request) (*http.Response, error) {
ctx := r.Context()
sp, ctx := opentracing.StartSpanFromContext(ctx, "limitedRoundTripper.do")
defer sp.Finish()
request, err := rt.codec.DecodeRequest(ctx, r, nil)
if err != nil {
return nil, err
}
response, err := rt.next.Do(ctx, request)
if err != nil {
return nil, err
}
return rt.codec.EncodeResponse(ctx, r, response)
}
type serializeHTTPHandler struct {
codec queryrangebase.Codec
next queryrangebase.Handler
}
func NewSerializeHTTPHandler(next queryrangebase.Handler, codec queryrangebase.Codec) http.Handler {
return &serializeHTTPHandler{
next: next,
codec: codec,
}
}
func (rt *serializeHTTPHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
sp, ctx := opentracing.StartSpanFromContext(ctx, "serializeHTTPHandler.ServerHTTP")
defer sp.Finish()
request, err := rt.codec.DecodeRequest(ctx, r, nil)
if err != nil {
serverutil.WriteError(err, w)
return
}
response, err := rt.next.Do(ctx, request)
if err != nil {
serverutil.WriteError(err, w)
return
}
version := loghttp.GetVersion(r.RequestURI)
encodingFlags := httpreq.ExtractEncodingFlags(r)
if err := encodeResponseJSONTo(version, response, w, encodingFlags); err != nil {
serverutil.WriteError(err, w)
}
}