diff options
Diffstat (limited to 'vendor/github.com/prometheus/client_golang/api/prometheus/v1/api.go')
| -rw-r--r-- | vendor/github.com/prometheus/client_golang/api/prometheus/v1/api.go | 293 |
1 files changed, 0 insertions, 293 deletions
diff --git a/vendor/github.com/prometheus/client_golang/api/prometheus/v1/api.go b/vendor/github.com/prometheus/client_golang/api/prometheus/v1/api.go deleted file mode 100644 index cb07022bc..000000000 --- a/vendor/github.com/prometheus/client_golang/api/prometheus/v1/api.go +++ /dev/null @@ -1,293 +0,0 @@ -// Copyright 2017 The Prometheus Authors -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -// +build go1.7 - -// Package v1 provides bindings to the Prometheus HTTP API v1: -// http://prometheus.io/docs/querying/api/ -package v1 - -import ( - "context" - "encoding/json" - "fmt" - "net/http" - "strconv" - "time" - - "github.com/prometheus/client_golang/api" - "github.com/prometheus/common/model" -) - -const ( - statusAPIError = 422 - - apiPrefix = "/api/v1" - - epQuery = apiPrefix + "/query" - epQueryRange = apiPrefix + "/query_range" - epLabelValues = apiPrefix + "/label/:name/values" - epSeries = apiPrefix + "/series" -) - -// ErrorType models the different API error types. -type ErrorType string - -// Possible values for ErrorType. -const ( - ErrBadData ErrorType = "bad_data" - ErrTimeout = "timeout" - ErrCanceled = "canceled" - ErrExec = "execution" - ErrBadResponse = "bad_response" -) - -// Error is an error returned by the API. -type Error struct { - Type ErrorType - Msg string -} - -func (e *Error) Error() string { - return fmt.Sprintf("%s: %s", e.Type, e.Msg) -} - -// Range represents a sliced time range. -type Range struct { - // The boundaries of the time range. - Start, End time.Time - // The maximum time between two slices within the boundaries. - Step time.Duration -} - -// API provides bindings for Prometheus's v1 API. -type API interface { - // Query performs a query for the given time. - Query(ctx context.Context, query string, ts time.Time) (model.Value, error) - // QueryRange performs a query for the given range. - QueryRange(ctx context.Context, query string, r Range) (model.Value, error) - // LabelValues performs a query for the values of the given label. - LabelValues(ctx context.Context, label string) (model.LabelValues, error) - // Series finds series by label matchers. - Series(ctx context.Context, matches []string, startTime time.Time, endTime time.Time) ([]model.LabelSet, error) -} - -// queryResult contains result data for a query. -type queryResult struct { - Type model.ValueType `json:"resultType"` - Result interface{} `json:"result"` - - // The decoded value. - v model.Value -} - -func (qr *queryResult) UnmarshalJSON(b []byte) error { - v := struct { - Type model.ValueType `json:"resultType"` - Result json.RawMessage `json:"result"` - }{} - - err := json.Unmarshal(b, &v) - if err != nil { - return err - } - - switch v.Type { - case model.ValScalar: - var sv model.Scalar - err = json.Unmarshal(v.Result, &sv) - qr.v = &sv - - case model.ValVector: - var vv model.Vector - err = json.Unmarshal(v.Result, &vv) - qr.v = vv - - case model.ValMatrix: - var mv model.Matrix - err = json.Unmarshal(v.Result, &mv) - qr.v = mv - - default: - err = fmt.Errorf("unexpected value type %q", v.Type) - } - return err -} - -// NewAPI returns a new API for the client. -// -// It is safe to use the returned API from multiple goroutines. -func NewAPI(c api.Client) API { - return &httpAPI{client: apiClient{c}} -} - -type httpAPI struct { - client api.Client -} - -func (h *httpAPI) Query(ctx context.Context, query string, ts time.Time) (model.Value, error) { - u := h.client.URL(epQuery, nil) - q := u.Query() - - q.Set("query", query) - if !ts.IsZero() { - q.Set("time", ts.Format(time.RFC3339Nano)) - } - - u.RawQuery = q.Encode() - - req, err := http.NewRequest("GET", u.String(), nil) - if err != nil { - return nil, err - } - - _, body, err := h.client.Do(ctx, req) - if err != nil { - return nil, err - } - - var qres queryResult - err = json.Unmarshal(body, &qres) - - return model.Value(qres.v), err -} - -func (h *httpAPI) QueryRange(ctx context.Context, query string, r Range) (model.Value, error) { - u := h.client.URL(epQueryRange, nil) - q := u.Query() - - var ( - start = r.Start.Format(time.RFC3339Nano) - end = r.End.Format(time.RFC3339Nano) - step = strconv.FormatFloat(r.Step.Seconds(), 'f', 3, 64) - ) - - q.Set("query", query) - q.Set("start", start) - q.Set("end", end) - q.Set("step", step) - - u.RawQuery = q.Encode() - - req, err := http.NewRequest("GET", u.String(), nil) - if err != nil { - return nil, err - } - - _, body, err := h.client.Do(ctx, req) - if err != nil { - return nil, err - } - - var qres queryResult - err = json.Unmarshal(body, &qres) - - return model.Value(qres.v), err -} - -func (h *httpAPI) LabelValues(ctx context.Context, label string) (model.LabelValues, error) { - u := h.client.URL(epLabelValues, map[string]string{"name": label}) - req, err := http.NewRequest(http.MethodGet, u.String(), nil) - if err != nil { - return nil, err - } - _, body, err := h.client.Do(ctx, req) - if err != nil { - return nil, err - } - var labelValues model.LabelValues - err = json.Unmarshal(body, &labelValues) - return labelValues, err -} - -func (h *httpAPI) Series(ctx context.Context, matches []string, startTime time.Time, endTime time.Time) ([]model.LabelSet, error) { - u := h.client.URL(epSeries, nil) - q := u.Query() - - for _, m := range matches { - q.Add("match[]", m) - } - - q.Set("start", startTime.Format(time.RFC3339Nano)) - q.Set("end", endTime.Format(time.RFC3339Nano)) - - u.RawQuery = q.Encode() - - req, err := http.NewRequest("GET", u.String(), nil) - if err != nil { - return nil, err - } - - _, body, err := h.client.Do(ctx, req) - if err != nil { - return nil, err - } - - var mset []model.LabelSet - err = json.Unmarshal(body, &mset) - return mset, err -} - -// apiClient wraps a regular client and processes successful API responses. -// Successful also includes responses that errored at the API level. -type apiClient struct { - api.Client -} - -type apiResponse struct { - Status string `json:"status"` - Data json.RawMessage `json:"data"` - ErrorType ErrorType `json:"errorType"` - Error string `json:"error"` -} - -func (c apiClient) Do(ctx context.Context, req *http.Request) (*http.Response, []byte, error) { - resp, body, err := c.Client.Do(ctx, req) - if err != nil { - return resp, body, err - } - - code := resp.StatusCode - - if code/100 != 2 && code != statusAPIError { - return resp, body, &Error{ - Type: ErrBadResponse, - Msg: fmt.Sprintf("bad response code %d", resp.StatusCode), - } - } - - var result apiResponse - - if err = json.Unmarshal(body, &result); err != nil { - return resp, body, &Error{ - Type: ErrBadResponse, - Msg: err.Error(), - } - } - - if (code == statusAPIError) != (result.Status == "error") { - err = &Error{ - Type: ErrBadResponse, - Msg: "inconsistent body for response code", - } - } - - if code == statusAPIError && result.Status == "error" { - err = &Error{ - Type: result.ErrorType, - Msg: result.Error, - } - } - - return resp, []byte(result.Data), err -} |