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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,321 @@ | ||
| package queryfrontend | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "context" | ||
| "encoding/json" | ||
| "io/ioutil" | ||
| "net/http" | ||
| "net/url" | ||
| "sort" | ||
| "strconv" | ||
| "strings" | ||
|
|
||
| "github.com/cortexproject/cortex/pkg/querier/queryrange" | ||
| cortexutil "github.com/cortexproject/cortex/pkg/util" | ||
| "github.com/cortexproject/cortex/pkg/util/spanlogger" | ||
| "github.com/opentracing/opentracing-go" | ||
| otlog "github.com/opentracing/opentracing-go/log" | ||
| "github.com/weaveworks/common/httpgrpc" | ||
|
|
||
| queryv1 "github.com/thanos-io/thanos/pkg/api/query" | ||
| ) | ||
|
|
||
| type metadataCodec struct { | ||
| queryrange.Codec | ||
| partialResponse bool | ||
| } | ||
|
|
||
| func NewThanosMetadataCodec(partialResponse bool) *metadataCodec { | ||
| return &metadataCodec{ | ||
| Codec: queryrange.PrometheusCodec, | ||
| partialResponse: partialResponse, | ||
| } | ||
| } | ||
|
|
||
| func (c metadataCodec) MergeResponse(responses ...queryrange.Response) (queryrange.Response, error) { | ||
| if len(responses) == 0 { | ||
| return &ThanosLabelsResponse{ | ||
| Status: queryrange.StatusSuccess, | ||
| Data: []string{}, | ||
| }, nil | ||
| } | ||
|
|
||
| switch responses[0].(type) { | ||
| case *ThanosLabelsResponse: | ||
| set := make(map[string]struct{}) | ||
|
|
||
| for _, res := range responses { | ||
| for _, value := range res.(*ThanosLabelsResponse).Data { | ||
| set[value] = struct{}{} | ||
| } | ||
| } | ||
| labels := make([]string, 0, len(set)) | ||
| for label := range set { | ||
| labels = append(labels, label) | ||
| } | ||
|
|
||
| sort.Strings(labels) | ||
| return &ThanosLabelsResponse{ | ||
| Status: queryrange.StatusSuccess, | ||
| Data: labels, | ||
| }, nil | ||
| case *ThanosSeriesResponse: | ||
| metadataResponses := make([]*ThanosSeriesResponse, 0, len(responses)) | ||
|
|
||
| for _, res := range responses { | ||
| metadataResponses = append(metadataResponses, res.(*ThanosSeriesResponse)) | ||
| } | ||
|
|
||
| return &ThanosSeriesResponse{ | ||
| Status: queryrange.StatusSuccess, | ||
| Data: metadataResponses[0].Data, | ||
| }, nil | ||
| default: | ||
| return nil, httpgrpc.Errorf(http.StatusBadRequest, "invalid response format") | ||
| } | ||
| } | ||
|
|
||
| func (c metadataCodec) DecodeRequest(_ context.Context, r *http.Request) (queryrange.Request, error) { | ||
| if err := r.ParseForm(); err != nil { | ||
| return nil, httpgrpc.Errorf(http.StatusBadRequest, err.Error()) | ||
| } | ||
|
|
||
| var ( | ||
| req queryrange.Request | ||
| err error | ||
| ) | ||
| switch op := getOperation(r); op { | ||
| case labelNamesOp, labelValuesOp: | ||
| req, err = c.parseLabelsRequest(r, op) | ||
| case seriesOp: | ||
| req, err = c.parseSeriesRequest(r) | ||
| } | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| return req, nil | ||
| } | ||
|
|
||
| func (c metadataCodec) EncodeRequest(ctx context.Context, r queryrange.Request) (*http.Request, error) { | ||
| var u *url.URL | ||
| switch thanosReq := r.(type) { | ||
| case *ThanosLabelsRequest: | ||
| var params = url.Values{ | ||
| "start": []string{encodeTime(thanosReq.Start)}, | ||
| "end": []string{encodeTime(thanosReq.End)}, | ||
| queryv1.PartialResponseParam: []string{strconv.FormatBool(thanosReq.PartialResponse)}, | ||
| } | ||
| if len(thanosReq.StoreMatchers) > 0 { | ||
| params[queryv1.StoreMatcherParam] = matchersToStringSlice(thanosReq.StoreMatchers) | ||
| } | ||
| u = &url.URL{ | ||
| Path: thanosReq.Path, | ||
| RawQuery: params.Encode(), | ||
| } | ||
| case *ThanosSeriesRequest: | ||
| var params = url.Values{ | ||
| "start": []string{encodeTime(thanosReq.Start)}, | ||
| "end": []string{encodeTime(thanosReq.End)}, | ||
| queryv1.DedupParam: []string{strconv.FormatBool(thanosReq.Dedup)}, | ||
| queryv1.PartialResponseParam: []string{strconv.FormatBool(thanosReq.PartialResponse)}, | ||
| queryv1.ReplicaLabelsParam: thanosReq.ReplicaLabels, | ||
| } | ||
| if len(thanosReq.Matchers) > 0 { | ||
| params[queryv1.MatcherParam] = matchersToStringSlice(thanosReq.Matchers) | ||
| } | ||
| if len(thanosReq.StoreMatchers) > 0 { | ||
| params[queryv1.StoreMatcherParam] = matchersToStringSlice(thanosReq.StoreMatchers) | ||
| } | ||
| u = &url.URL{ | ||
| Path: thanosReq.Path, | ||
| RawQuery: params.Encode(), | ||
| } | ||
| default: | ||
| return nil, httpgrpc.Errorf(http.StatusInternalServerError, "invalid request format") | ||
| } | ||
|
|
||
| req := &http.Request{ | ||
| Method: "GET", | ||
| RequestURI: u.String(), // This is what the httpgrpc code looks at. | ||
| URL: u, | ||
| Body: http.NoBody, | ||
| Header: http.Header{}, | ||
| } | ||
|
|
||
| return req.WithContext(ctx), nil | ||
| } | ||
|
|
||
| func (c metadataCodec) DecodeResponse(ctx context.Context, r *http.Response, req queryrange.Request) (queryrange.Response, error) { | ||
| if r.StatusCode/100 != 2 { | ||
| body, _ := ioutil.ReadAll(r.Body) | ||
| return nil, httpgrpc.Errorf(r.StatusCode, string(body)) | ||
| } | ||
| log, ctx := spanlogger.New(ctx, "ParseQueryResponse") //nolint:ineffassign,staticcheck | ||
| defer log.Finish() | ||
|
|
||
| buf, err := ioutil.ReadAll(r.Body) | ||
| if err != nil { | ||
| log.Error(err) | ||
| return nil, httpgrpc.Errorf(http.StatusInternalServerError, "error decoding response: %v", err) | ||
| } | ||
|
|
||
| log.LogFields(otlog.Int("bytes", len(buf))) | ||
|
|
||
| switch req.(type) { | ||
| case *ThanosLabelsRequest: | ||
| var resp ThanosLabelsResponse | ||
| if err := json.Unmarshal(buf, &resp); err != nil { | ||
| return nil, httpgrpc.Errorf(http.StatusInternalServerError, "error decoding response: %v", err) | ||
| } | ||
| return &resp, nil | ||
| case *ThanosSeriesRequest: | ||
| var resp ThanosSeriesResponse | ||
| if err := json.Unmarshal(buf, &resp); err != nil { | ||
| return nil, httpgrpc.Errorf(http.StatusInternalServerError, "error decoding response: %v", err) | ||
| } | ||
| return &resp, nil | ||
| default: | ||
| return nil, httpgrpc.Errorf(http.StatusBadRequest, "invalid response format") | ||
| } | ||
| } | ||
|
|
||
| func (c metadataCodec) EncodeResponse(ctx context.Context, res queryrange.Response) (*http.Response, error) { | ||
| sp, _ := opentracing.StartSpanFromContext(ctx, "APIResponse.ToHTTPResponse") | ||
| defer sp.Finish() | ||
|
|
||
| var ( | ||
| b []byte | ||
| err error | ||
| ) | ||
| switch resp := res.(type) { | ||
| case *ThanosLabelsResponse: | ||
| sp.LogFields(otlog.Int("labels", len(resp.Data))) | ||
| b, err = json.Marshal(resp) | ||
| if err != nil { | ||
| return nil, httpgrpc.Errorf(http.StatusInternalServerError, "error encoding response: %v", err) | ||
| } | ||
| case *ThanosSeriesResponse: | ||
| sp.LogFields(otlog.Int("series", len(resp.Data))) | ||
| b, err = json.Marshal(resp) | ||
| if err != nil { | ||
| return nil, httpgrpc.Errorf(http.StatusInternalServerError, "error encoding response: %v", err) | ||
| } | ||
| default: | ||
| return nil, httpgrpc.Errorf(http.StatusBadRequest, "invalid response format") | ||
| } | ||
|
|
||
| sp.LogFields(otlog.Int("bytes", len(b))) | ||
| resp := http.Response{ | ||
| Header: http.Header{ | ||
| "Content-Type": []string{"application/json"}, | ||
| }, | ||
| Body: ioutil.NopCloser(bytes.NewBuffer(b)), | ||
| StatusCode: http.StatusOK, | ||
| } | ||
| return &resp, nil | ||
| } | ||
|
|
||
| func (c metadataCodec) parseLabelsRequest(r *http.Request, op string) (queryrange.Request, error) { | ||
| var ( | ||
| result ThanosLabelsRequest | ||
| err error | ||
| ) | ||
| result.Start, err = cortexutil.ParseTime(r.FormValue("start")) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| result.End, err = cortexutil.ParseTime(r.FormValue("end")) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| if result.End < result.Start { | ||
| return nil, errEndBeforeStart | ||
| } | ||
|
|
||
| result.PartialResponse, err = parsePartialResponseParam(r.FormValue(queryv1.PartialResponseParam), c.partialResponse) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| result.StoreMatchers, err = parseMatchersParam(r.Form[queryv1.StoreMatcherParam]) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| result.Path = r.URL.Path | ||
|
|
||
| if op == seriesOp { | ||
| parts := strings.Split(r.URL.Path, "/") | ||
| if len(parts) > 1 { | ||
| result.Label = parts[len(parts)-2] | ||
| } | ||
| } | ||
|
|
||
| for _, value := range r.Header.Values(cacheControlHeader) { | ||
| if strings.Contains(value, noStoreValue) { | ||
| result.CachingOptions.Disabled = true | ||
| break | ||
| } | ||
| } | ||
|
|
||
| return &result, nil | ||
| } | ||
|
|
||
| func (c metadataCodec) parseSeriesRequest(r *http.Request) (queryrange.Request, error) { | ||
| var ( | ||
| result ThanosSeriesRequest | ||
| err error | ||
| ) | ||
| result.Start, err = cortexutil.ParseTime(r.FormValue("start")) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| result.End, err = cortexutil.ParseTime(r.FormValue("end")) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| if result.End < result.Start { | ||
| return nil, errEndBeforeStart | ||
| } | ||
|
|
||
| result.Matchers, err = parseMatchersParam(r.Form[queryv1.MatcherParam]) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| result.Dedup, err = parseEnableDedupParam(r.FormValue(queryv1.DedupParam)) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| result.PartialResponse, err = parsePartialResponseParam(r.FormValue(queryv1.PartialResponseParam), c.partialResponse) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| if len(r.Form[queryv1.ReplicaLabelsParam]) > 0 { | ||
| result.ReplicaLabels = r.Form[queryv1.ReplicaLabelsParam] | ||
| } | ||
|
|
||
| result.StoreMatchers, err = parseMatchersParam(r.Form[queryv1.StoreMatcherParam]) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| result.Path = r.URL.Path | ||
|
|
||
| for _, value := range r.Header.Values(cacheControlHeader) { | ||
| if strings.Contains(value, noStoreValue) { | ||
| result.CachingOptions.Disabled = true | ||
| break | ||
| } | ||
| } | ||
|
|
||
| return &result, nil | ||
| } |
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