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authorDaniel J Walsh <dwalsh@redhat.com>2018-01-10 15:58:18 -0500
committerAtomic Bot <atomic-devel@projectatomic.io>2018-01-11 12:39:06 +0000
commitdd0d35deb098b63f8c5be7ef9d8d63c16760221b (patch)
tree695d44a49d636e45e4121c9aecfb3d8c0e1cca06 /vendor/github.com/prometheus/common/expfmt
parente6be800ec633342aef656e0a2ed0bdc4519796d9 (diff)
downloadpodman-dd0d35deb098b63f8c5be7ef9d8d63c16760221b.tar.gz
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Add support for shm-size.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com> Closes: #206 Approved by: TomSweeneyRedHat
Diffstat (limited to 'vendor/github.com/prometheus/common/expfmt')
-rw-r--r--vendor/github.com/prometheus/common/expfmt/decode.go429
-rw-r--r--vendor/github.com/prometheus/common/expfmt/encode.go88
-rw-r--r--vendor/github.com/prometheus/common/expfmt/expfmt.go38
-rw-r--r--vendor/github.com/prometheus/common/expfmt/fuzz.go36
-rw-r--r--vendor/github.com/prometheus/common/expfmt/text_create.go303
-rw-r--r--vendor/github.com/prometheus/common/expfmt/text_parse.go753
6 files changed, 0 insertions, 1647 deletions
diff --git a/vendor/github.com/prometheus/common/expfmt/decode.go b/vendor/github.com/prometheus/common/expfmt/decode.go
deleted file mode 100644
index a7a42d5ef..000000000
--- a/vendor/github.com/prometheus/common/expfmt/decode.go
+++ /dev/null
@@ -1,429 +0,0 @@
-// Copyright 2015 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.
-
-package expfmt
-
-import (
- "fmt"
- "io"
- "math"
- "mime"
- "net/http"
-
- dto "github.com/prometheus/client_model/go"
-
- "github.com/matttproud/golang_protobuf_extensions/pbutil"
- "github.com/prometheus/common/model"
-)
-
-// Decoder types decode an input stream into metric families.
-type Decoder interface {
- Decode(*dto.MetricFamily) error
-}
-
-// DecodeOptions contains options used by the Decoder and in sample extraction.
-type DecodeOptions struct {
- // Timestamp is added to each value from the stream that has no explicit timestamp set.
- Timestamp model.Time
-}
-
-// ResponseFormat extracts the correct format from a HTTP response header.
-// If no matching format can be found FormatUnknown is returned.
-func ResponseFormat(h http.Header) Format {
- ct := h.Get(hdrContentType)
-
- mediatype, params, err := mime.ParseMediaType(ct)
- if err != nil {
- return FmtUnknown
- }
-
- const textType = "text/plain"
-
- switch mediatype {
- case ProtoType:
- if p, ok := params["proto"]; ok && p != ProtoProtocol {
- return FmtUnknown
- }
- if e, ok := params["encoding"]; ok && e != "delimited" {
- return FmtUnknown
- }
- return FmtProtoDelim
-
- case textType:
- if v, ok := params["version"]; ok && v != TextVersion {
- return FmtUnknown
- }
- return FmtText
- }
-
- return FmtUnknown
-}
-
-// NewDecoder returns a new decoder based on the given input format.
-// If the input format does not imply otherwise, a text format decoder is returned.
-func NewDecoder(r io.Reader, format Format) Decoder {
- switch format {
- case FmtProtoDelim:
- return &protoDecoder{r: r}
- }
- return &textDecoder{r: r}
-}
-
-// protoDecoder implements the Decoder interface for protocol buffers.
-type protoDecoder struct {
- r io.Reader
-}
-
-// Decode implements the Decoder interface.
-func (d *protoDecoder) Decode(v *dto.MetricFamily) error {
- _, err := pbutil.ReadDelimited(d.r, v)
- if err != nil {
- return err
- }
- if !model.IsValidMetricName(model.LabelValue(v.GetName())) {
- return fmt.Errorf("invalid metric name %q", v.GetName())
- }
- for _, m := range v.GetMetric() {
- if m == nil {
- continue
- }
- for _, l := range m.GetLabel() {
- if l == nil {
- continue
- }
- if !model.LabelValue(l.GetValue()).IsValid() {
- return fmt.Errorf("invalid label value %q", l.GetValue())
- }
- if !model.LabelName(l.GetName()).IsValid() {
- return fmt.Errorf("invalid label name %q", l.GetName())
- }
- }
- }
- return nil
-}
-
-// textDecoder implements the Decoder interface for the text protocol.
-type textDecoder struct {
- r io.Reader
- p TextParser
- fams []*dto.MetricFamily
-}
-
-// Decode implements the Decoder interface.
-func (d *textDecoder) Decode(v *dto.MetricFamily) error {
- // TODO(fabxc): Wrap this as a line reader to make streaming safer.
- if len(d.fams) == 0 {
- // No cached metric families, read everything and parse metrics.
- fams, err := d.p.TextToMetricFamilies(d.r)
- if err != nil {
- return err
- }
- if len(fams) == 0 {
- return io.EOF
- }
- d.fams = make([]*dto.MetricFamily, 0, len(fams))
- for _, f := range fams {
- d.fams = append(d.fams, f)
- }
- }
-
- *v = *d.fams[0]
- d.fams = d.fams[1:]
-
- return nil
-}
-
-// SampleDecoder wraps a Decoder to extract samples from the metric families
-// decoded by the wrapped Decoder.
-type SampleDecoder struct {
- Dec Decoder
- Opts *DecodeOptions
-
- f dto.MetricFamily
-}
-
-// Decode calls the Decode method of the wrapped Decoder and then extracts the
-// samples from the decoded MetricFamily into the provided model.Vector.
-func (sd *SampleDecoder) Decode(s *model.Vector) error {
- err := sd.Dec.Decode(&sd.f)
- if err != nil {
- return err
- }
- *s, err = extractSamples(&sd.f, sd.Opts)
- return err
-}
-
-// ExtractSamples builds a slice of samples from the provided metric
-// families. If an error occurs during sample extraction, it continues to
-// extract from the remaining metric families. The returned error is the last
-// error that has occured.
-func ExtractSamples(o *DecodeOptions, fams ...*dto.MetricFamily) (model.Vector, error) {
- var (
- all model.Vector
- lastErr error
- )
- for _, f := range fams {
- some, err := extractSamples(f, o)
- if err != nil {
- lastErr = err
- continue
- }
- all = append(all, some...)
- }
- return all, lastErr
-}
-
-func extractSamples(f *dto.MetricFamily, o *DecodeOptions) (model.Vector, error) {
- switch f.GetType() {
- case dto.MetricType_COUNTER:
- return extractCounter(o, f), nil
- case dto.MetricType_GAUGE:
- return extractGauge(o, f), nil
- case dto.MetricType_SUMMARY:
- return extractSummary(o, f), nil
- case dto.MetricType_UNTYPED:
- return extractUntyped(o, f), nil
- case dto.MetricType_HISTOGRAM:
- return extractHistogram(o, f), nil
- }
- return nil, fmt.Errorf("expfmt.extractSamples: unknown metric family type %v", f.GetType())
-}
-
-func extractCounter(o *DecodeOptions, f *dto.MetricFamily) model.Vector {
- samples := make(model.Vector, 0, len(f.Metric))
-
- for _, m := range f.Metric {
- if m.Counter == nil {
- continue
- }
-
- lset := make(model.LabelSet, len(m.Label)+1)
- for _, p := range m.Label {
- lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue())
- }
- lset[model.MetricNameLabel] = model.LabelValue(f.GetName())
-
- smpl := &model.Sample{
- Metric: model.Metric(lset),
- Value: model.SampleValue(m.Counter.GetValue()),
- }
-
- if m.TimestampMs != nil {
- smpl.Timestamp = model.TimeFromUnixNano(*m.TimestampMs * 1000000)
- } else {
- smpl.Timestamp = o.Timestamp
- }
-
- samples = append(samples, smpl)
- }
-
- return samples
-}
-
-func extractGauge(o *DecodeOptions, f *dto.MetricFamily) model.Vector {
- samples := make(model.Vector, 0, len(f.Metric))
-
- for _, m := range f.Metric {
- if m.Gauge == nil {
- continue
- }
-
- lset := make(model.LabelSet, len(m.Label)+1)
- for _, p := range m.Label {
- lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue())
- }
- lset[model.MetricNameLabel] = model.LabelValue(f.GetName())
-
- smpl := &model.Sample{
- Metric: model.Metric(lset),
- Value: model.SampleValue(m.Gauge.GetValue()),
- }
-
- if m.TimestampMs != nil {
- smpl.Timestamp = model.TimeFromUnixNano(*m.TimestampMs * 1000000)
- } else {
- smpl.Timestamp = o.Timestamp
- }
-
- samples = append(samples, smpl)
- }
-
- return samples
-}
-
-func extractUntyped(o *DecodeOptions, f *dto.MetricFamily) model.Vector {
- samples := make(model.Vector, 0, len(f.Metric))
-
- for _, m := range f.Metric {
- if m.Untyped == nil {
- continue
- }
-
- lset := make(model.LabelSet, len(m.Label)+1)
- for _, p := range m.Label {
- lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue())
- }
- lset[model.MetricNameLabel] = model.LabelValue(f.GetName())
-
- smpl := &model.Sample{
- Metric: model.Metric(lset),
- Value: model.SampleValue(m.Untyped.GetValue()),
- }
-
- if m.TimestampMs != nil {
- smpl.Timestamp = model.TimeFromUnixNano(*m.TimestampMs * 1000000)
- } else {
- smpl.Timestamp = o.Timestamp
- }
-
- samples = append(samples, smpl)
- }
-
- return samples
-}
-
-func extractSummary(o *DecodeOptions, f *dto.MetricFamily) model.Vector {
- samples := make(model.Vector, 0, len(f.Metric))
-
- for _, m := range f.Metric {
- if m.Summary == nil {
- continue
- }
-
- timestamp := o.Timestamp
- if m.TimestampMs != nil {
- timestamp = model.TimeFromUnixNano(*m.TimestampMs * 1000000)
- }
-
- for _, q := range m.Summary.Quantile {
- lset := make(model.LabelSet, len(m.Label)+2)
- for _, p := range m.Label {
- lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue())
- }
- // BUG(matt): Update other names to "quantile".
- lset[model.LabelName(model.QuantileLabel)] = model.LabelValue(fmt.Sprint(q.GetQuantile()))
- lset[model.MetricNameLabel] = model.LabelValue(f.GetName())
-
- samples = append(samples, &model.Sample{
- Metric: model.Metric(lset),
- Value: model.SampleValue(q.GetValue()),
- Timestamp: timestamp,
- })
- }
-
- lset := make(model.LabelSet, len(m.Label)+1)
- for _, p := range m.Label {
- lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue())
- }
- lset[model.MetricNameLabel] = model.LabelValue(f.GetName() + "_sum")
-
- samples = append(samples, &model.Sample{
- Metric: model.Metric(lset),
- Value: model.SampleValue(m.Summary.GetSampleSum()),
- Timestamp: timestamp,
- })
-
- lset = make(model.LabelSet, len(m.Label)+1)
- for _, p := range m.Label {
- lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue())
- }
- lset[model.MetricNameLabel] = model.LabelValue(f.GetName() + "_count")
-
- samples = append(samples, &model.Sample{
- Metric: model.Metric(lset),
- Value: model.SampleValue(m.Summary.GetSampleCount()),
- Timestamp: timestamp,
- })
- }
-
- return samples
-}
-
-func extractHistogram(o *DecodeOptions, f *dto.MetricFamily) model.Vector {
- samples := make(model.Vector, 0, len(f.Metric))
-
- for _, m := range f.Metric {
- if m.Histogram == nil {
- continue
- }
-
- timestamp := o.Timestamp
- if m.TimestampMs != nil {
- timestamp = model.TimeFromUnixNano(*m.TimestampMs * 1000000)
- }
-
- infSeen := false
-
- for _, q := range m.Histogram.Bucket {
- lset := make(model.LabelSet, len(m.Label)+2)
- for _, p := range m.Label {
- lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue())
- }
- lset[model.LabelName(model.BucketLabel)] = model.LabelValue(fmt.Sprint(q.GetUpperBound()))
- lset[model.MetricNameLabel] = model.LabelValue(f.GetName() + "_bucket")
-
- if math.IsInf(q.GetUpperBound(), +1) {
- infSeen = true
- }
-
- samples = append(samples, &model.Sample{
- Metric: model.Metric(lset),
- Value: model.SampleValue(q.GetCumulativeCount()),
- Timestamp: timestamp,
- })
- }
-
- lset := make(model.LabelSet, len(m.Label)+1)
- for _, p := range m.Label {
- lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue())
- }
- lset[model.MetricNameLabel] = model.LabelValue(f.GetName() + "_sum")
-
- samples = append(samples, &model.Sample{
- Metric: model.Metric(lset),
- Value: model.SampleValue(m.Histogram.GetSampleSum()),
- Timestamp: timestamp,
- })
-
- lset = make(model.LabelSet, len(m.Label)+1)
- for _, p := range m.Label {
- lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue())
- }
- lset[model.MetricNameLabel] = model.LabelValue(f.GetName() + "_count")
-
- count := &model.Sample{
- Metric: model.Metric(lset),
- Value: model.SampleValue(m.Histogram.GetSampleCount()),
- Timestamp: timestamp,
- }
- samples = append(samples, count)
-
- if !infSeen {
- // Append an infinity bucket sample.
- lset := make(model.LabelSet, len(m.Label)+2)
- for _, p := range m.Label {
- lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue())
- }
- lset[model.LabelName(model.BucketLabel)] = model.LabelValue("+Inf")
- lset[model.MetricNameLabel] = model.LabelValue(f.GetName() + "_bucket")
-
- samples = append(samples, &model.Sample{
- Metric: model.Metric(lset),
- Value: count.Value,
- Timestamp: timestamp,
- })
- }
- }
-
- return samples
-}
diff --git a/vendor/github.com/prometheus/common/expfmt/encode.go b/vendor/github.com/prometheus/common/expfmt/encode.go
deleted file mode 100644
index 11839ed65..000000000
--- a/vendor/github.com/prometheus/common/expfmt/encode.go
+++ /dev/null
@@ -1,88 +0,0 @@
-// Copyright 2015 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.
-
-package expfmt
-
-import (
- "fmt"
- "io"
- "net/http"
-
- "github.com/golang/protobuf/proto"
- "github.com/matttproud/golang_protobuf_extensions/pbutil"
- "github.com/prometheus/common/internal/bitbucket.org/ww/goautoneg"
-
- dto "github.com/prometheus/client_model/go"
-)
-
-// Encoder types encode metric families into an underlying wire protocol.
-type Encoder interface {
- Encode(*dto.MetricFamily) error
-}
-
-type encoder func(*dto.MetricFamily) error
-
-func (e encoder) Encode(v *dto.MetricFamily) error {
- return e(v)
-}
-
-// Negotiate returns the Content-Type based on the given Accept header.
-// If no appropriate accepted type is found, FmtText is returned.
-func Negotiate(h http.Header) Format {
- for _, ac := range goautoneg.ParseAccept(h.Get(hdrAccept)) {
- // Check for protocol buffer
- if ac.Type+"/"+ac.SubType == ProtoType && ac.Params["proto"] == ProtoProtocol {
- switch ac.Params["encoding"] {
- case "delimited":
- return FmtProtoDelim
- case "text":
- return FmtProtoText
- case "compact-text":
- return FmtProtoCompact
- }
- }
- // Check for text format.
- ver := ac.Params["version"]
- if ac.Type == "text" && ac.SubType == "plain" && (ver == TextVersion || ver == "") {
- return FmtText
- }
- }
- return FmtText
-}
-
-// NewEncoder returns a new encoder based on content type negotiation.
-func NewEncoder(w io.Writer, format Format) Encoder {
- switch format {
- case FmtProtoDelim:
- return encoder(func(v *dto.MetricFamily) error {
- _, err := pbutil.WriteDelimited(w, v)
- return err
- })
- case FmtProtoCompact:
- return encoder(func(v *dto.MetricFamily) error {
- _, err := fmt.Fprintln(w, v.String())
- return err
- })
- case FmtProtoText:
- return encoder(func(v *dto.MetricFamily) error {
- _, err := fmt.Fprintln(w, proto.MarshalTextString(v))
- return err
- })
- case FmtText:
- return encoder(func(v *dto.MetricFamily) error {
- _, err := MetricFamilyToText(w, v)
- return err
- })
- }
- panic("expfmt.NewEncoder: unknown format")
-}
diff --git a/vendor/github.com/prometheus/common/expfmt/expfmt.go b/vendor/github.com/prometheus/common/expfmt/expfmt.go
deleted file mode 100644
index 371ac7503..000000000
--- a/vendor/github.com/prometheus/common/expfmt/expfmt.go
+++ /dev/null
@@ -1,38 +0,0 @@
-// Copyright 2015 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.
-
-// Package expfmt contains tools for reading and writing Prometheus metrics.
-package expfmt
-
-// Format specifies the HTTP content type of the different wire protocols.
-type Format string
-
-// Constants to assemble the Content-Type values for the different wire protocols.
-const (
- TextVersion = "0.0.4"
- ProtoType = `application/vnd.google.protobuf`
- ProtoProtocol = `io.prometheus.client.MetricFamily`
- ProtoFmt = ProtoType + "; proto=" + ProtoProtocol + ";"
-
- // The Content-Type values for the different wire protocols.
- FmtUnknown Format = `<unknown>`
- FmtText Format = `text/plain; version=` + TextVersion
- FmtProtoDelim Format = ProtoFmt + ` encoding=delimited`
- FmtProtoText Format = ProtoFmt + ` encoding=text`
- FmtProtoCompact Format = ProtoFmt + ` encoding=compact-text`
-)
-
-const (
- hdrContentType = "Content-Type"
- hdrAccept = "Accept"
-)
diff --git a/vendor/github.com/prometheus/common/expfmt/fuzz.go b/vendor/github.com/prometheus/common/expfmt/fuzz.go
deleted file mode 100644
index dc2eedeef..000000000
--- a/vendor/github.com/prometheus/common/expfmt/fuzz.go
+++ /dev/null
@@ -1,36 +0,0 @@
-// Copyright 2014 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 only when actually fuzzing
-// +build gofuzz
-
-package expfmt
-
-import "bytes"
-
-// Fuzz text metric parser with with github.com/dvyukov/go-fuzz:
-//
-// go-fuzz-build github.com/prometheus/common/expfmt
-// go-fuzz -bin expfmt-fuzz.zip -workdir fuzz
-//
-// Further input samples should go in the folder fuzz/corpus.
-func Fuzz(in []byte) int {
- parser := TextParser{}
- _, err := parser.TextToMetricFamilies(bytes.NewReader(in))
-
- if err != nil {
- return 0
- }
-
- return 1
-}
diff --git a/vendor/github.com/prometheus/common/expfmt/text_create.go b/vendor/github.com/prometheus/common/expfmt/text_create.go
deleted file mode 100644
index f11321cd0..000000000
--- a/vendor/github.com/prometheus/common/expfmt/text_create.go
+++ /dev/null
@@ -1,303 +0,0 @@
-// Copyright 2014 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.
-
-package expfmt
-
-import (
- "fmt"
- "io"
- "math"
- "strings"
-
- dto "github.com/prometheus/client_model/go"
- "github.com/prometheus/common/model"
-)
-
-// MetricFamilyToText converts a MetricFamily proto message into text format and
-// writes the resulting lines to 'out'. It returns the number of bytes written
-// and any error encountered. The output will have the same order as the input,
-// no further sorting is performed. Furthermore, this function assumes the input
-// is already sanitized and does not perform any sanity checks. If the input
-// contains duplicate metrics or invalid metric or label names, the conversion
-// will result in invalid text format output.
-//
-// This method fulfills the type 'prometheus.encoder'.
-func MetricFamilyToText(out io.Writer, in *dto.MetricFamily) (int, error) {
- var written int
-
- // Fail-fast checks.
- if len(in.Metric) == 0 {
- return written, fmt.Errorf("MetricFamily has no metrics: %s", in)
- }
- name := in.GetName()
- if name == "" {
- return written, fmt.Errorf("MetricFamily has no name: %s", in)
- }
-
- // Comments, first HELP, then TYPE.
- if in.Help != nil {
- n, err := fmt.Fprintf(
- out, "# HELP %s %s\n",
- name, escapeString(*in.Help, false),
- )
- written += n
- if err != nil {
- return written, err
- }
- }
- metricType := in.GetType()
- n, err := fmt.Fprintf(
- out, "# TYPE %s %s\n",
- name, strings.ToLower(metricType.String()),
- )
- written += n
- if err != nil {
- return written, err
- }
-
- // Finally the samples, one line for each.
- for _, metric := range in.Metric {
- switch metricType {
- case dto.MetricType_COUNTER:
- if metric.Counter == nil {
- return written, fmt.Errorf(
- "expected counter in metric %s %s", name, metric,
- )
- }
- n, err = writeSample(
- name, metric, "", "",
- metric.Counter.GetValue(),
- out,
- )
- case dto.MetricType_GAUGE:
- if metric.Gauge == nil {
- return written, fmt.Errorf(
- "expected gauge in metric %s %s", name, metric,
- )
- }
- n, err = writeSample(
- name, metric, "", "",
- metric.Gauge.GetValue(),
- out,
- )
- case dto.MetricType_UNTYPED:
- if metric.Untyped == nil {
- return written, fmt.Errorf(
- "expected untyped in metric %s %s", name, metric,
- )
- }
- n, err = writeSample(
- name, metric, "", "",
- metric.Untyped.GetValue(),
- out,
- )
- case dto.MetricType_SUMMARY:
- if metric.Summary == nil {
- return written, fmt.Errorf(
- "expected summary in metric %s %s", name, metric,
- )
- }
- for _, q := range metric.Summary.Quantile {
- n, err = writeSample(
- name, metric,
- model.QuantileLabel, fmt.Sprint(q.GetQuantile()),
- q.GetValue(),
- out,
- )
- written += n
- if err != nil {
- return written, err
- }
- }
- n, err = writeSample(
- name+"_sum", metric, "", "",
- metric.Summary.GetSampleSum(),
- out,
- )
- if err != nil {
- return written, err
- }
- written += n
- n, err = writeSample(
- name+"_count", metric, "", "",
- float64(metric.Summary.GetSampleCount()),
- out,
- )
- case dto.MetricType_HISTOGRAM:
- if metric.Histogram == nil {
- return written, fmt.Errorf(
- "expected histogram in metric %s %s", name, metric,
- )
- }
- infSeen := false
- for _, q := range metric.Histogram.Bucket {
- n, err = writeSample(
- name+"_bucket", metric,
- model.BucketLabel, fmt.Sprint(q.GetUpperBound()),
- float64(q.GetCumulativeCount()),
- out,
- )
- written += n
- if err != nil {
- return written, err
- }
- if math.IsInf(q.GetUpperBound(), +1) {
- infSeen = true
- }
- }
- if !infSeen {
- n, err = writeSample(
- name+"_bucket", metric,
- model.BucketLabel, "+Inf",
- float64(metric.Histogram.GetSampleCount()),
- out,
- )
- if err != nil {
- return written, err
- }
- written += n
- }
- n, err = writeSample(
- name+"_sum", metric, "", "",
- metric.Histogram.GetSampleSum(),
- out,
- )
- if err != nil {
- return written, err
- }
- written += n
- n, err = writeSample(
- name+"_count", metric, "", "",
- float64(metric.Histogram.GetSampleCount()),
- out,
- )
- default:
- return written, fmt.Errorf(
- "unexpected type in metric %s %s", name, metric,
- )
- }
- written += n
- if err != nil {
- return written, err
- }
- }
- return written, nil
-}
-
-// writeSample writes a single sample in text format to out, given the metric
-// name, the metric proto message itself, optionally an additional label name
-// and value (use empty strings if not required), and the value. The function
-// returns the number of bytes written and any error encountered.
-func writeSample(
- name string,
- metric *dto.Metric,
- additionalLabelName, additionalLabelValue string,
- value float64,
- out io.Writer,
-) (int, error) {
- var written int
- n, err := fmt.Fprint(out, name)
- written += n
- if err != nil {
- return written, err
- }
- n, err = labelPairsToText(
- metric.Label,
- additionalLabelName, additionalLabelValue,
- out,
- )
- written += n
- if err != nil {
- return written, err
- }
- n, err = fmt.Fprintf(out, " %v", value)
- written += n
- if err != nil {
- return written, err
- }
- if metric.TimestampMs != nil {
- n, err = fmt.Fprintf(out, " %v", *metric.TimestampMs)
- written += n
- if err != nil {
- return written, err
- }
- }
- n, err = out.Write([]byte{'\n'})
- written += n
- if err != nil {
- return written, err
- }
- return written, nil
-}
-
-// labelPairsToText converts a slice of LabelPair proto messages plus the
-// explicitly given additional label pair into text formatted as required by the
-// text format and writes it to 'out'. An empty slice in combination with an
-// empty string 'additionalLabelName' results in nothing being
-// written. Otherwise, the label pairs are written, escaped as required by the
-// text format, and enclosed in '{...}'. The function returns the number of
-// bytes written and any error encountered.
-func labelPairsToText(
- in []*dto.LabelPair,
- additionalLabelName, additionalLabelValue string,
- out io.Writer,
-) (int, error) {
- if len(in) == 0 && additionalLabelName == "" {
- return 0, nil
- }
- var written int
- separator := '{'
- for _, lp := range in {
- n, err := fmt.Fprintf(
- out, `%c%s="%s"`,
- separator, lp.GetName(), escapeString(lp.GetValue(), true),
- )
- written += n
- if err != nil {
- return written, err
- }
- separator = ','
- }
- if additionalLabelName != "" {
- n, err := fmt.Fprintf(
- out, `%c%s="%s"`,
- separator, additionalLabelName,
- escapeString(additionalLabelValue, true),
- )
- written += n
- if err != nil {
- return written, err
- }
- }
- n, err := out.Write([]byte{'}'})
- written += n
- if err != nil {
- return written, err
- }
- return written, nil
-}
-
-var (
- escape = strings.NewReplacer("\\", `\\`, "\n", `\n`)
- escapeWithDoubleQuote = strings.NewReplacer("\\", `\\`, "\n", `\n`, "\"", `\"`)
-)
-
-// escapeString replaces '\' by '\\', new line character by '\n', and - if
-// includeDoubleQuote is true - '"' by '\"'.
-func escapeString(v string, includeDoubleQuote bool) string {
- if includeDoubleQuote {
- return escapeWithDoubleQuote.Replace(v)
- }
-
- return escape.Replace(v)
-}
diff --git a/vendor/github.com/prometheus/common/expfmt/text_parse.go b/vendor/github.com/prometheus/common/expfmt/text_parse.go
deleted file mode 100644
index ef9a15077..000000000
--- a/vendor/github.com/prometheus/common/expfmt/text_parse.go
+++ /dev/null
@@ -1,753 +0,0 @@
-// Copyright 2014 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.
-
-package expfmt
-
-import (
- "bufio"
- "bytes"
- "fmt"
- "io"
- "math"
- "strconv"
- "strings"
-
- dto "github.com/prometheus/client_model/go"
-
- "github.com/golang/protobuf/proto"
- "github.com/prometheus/common/model"
-)
-
-// A stateFn is a function that represents a state in a state machine. By
-// executing it, the state is progressed to the next state. The stateFn returns
-// another stateFn, which represents the new state. The end state is represented
-// by nil.
-type stateFn func() stateFn
-
-// ParseError signals errors while parsing the simple and flat text-based
-// exchange format.
-type ParseError struct {
- Line int
- Msg string
-}
-
-// Error implements the error interface.
-func (e ParseError) Error() string {
- return fmt.Sprintf("text format parsing error in line %d: %s", e.Line, e.Msg)
-}
-
-// TextParser is used to parse the simple and flat text-based exchange format. Its
-// zero value is ready to use.
-type TextParser struct {
- metricFamiliesByName map[string]*dto.MetricFamily
- buf *bufio.Reader // Where the parsed input is read through.
- err error // Most recent error.
- lineCount int // Tracks the line count for error messages.
- currentByte byte // The most recent byte read.
- currentToken bytes.Buffer // Re-used each time a token has to be gathered from multiple bytes.
- currentMF *dto.MetricFamily
- currentMetric *dto.Metric
- currentLabelPair *dto.LabelPair
-
- // The remaining member variables are only used for summaries/histograms.
- currentLabels map[string]string // All labels including '__name__' but excluding 'quantile'/'le'
- // Summary specific.
- summaries map[uint64]*dto.Metric // Key is created with LabelsToSignature.
- currentQuantile float64
- // Histogram specific.
- histograms map[uint64]*dto.Metric // Key is created with LabelsToSignature.
- currentBucket float64
- // These tell us if the currently processed line ends on '_count' or
- // '_sum' respectively and belong to a summary/histogram, representing the sample
- // count and sum of that summary/histogram.
- currentIsSummaryCount, currentIsSummarySum bool
- currentIsHistogramCount, currentIsHistogramSum bool
-}
-
-// TextToMetricFamilies reads 'in' as the simple and flat text-based exchange
-// format and creates MetricFamily proto messages. It returns the MetricFamily
-// proto messages in a map where the metric names are the keys, along with any
-// error encountered.
-//
-// If the input contains duplicate metrics (i.e. lines with the same metric name
-// and exactly the same label set), the resulting MetricFamily will contain
-// duplicate Metric proto messages. Similar is true for duplicate label
-// names. Checks for duplicates have to be performed separately, if required.
-// Also note that neither the metrics within each MetricFamily are sorted nor
-// the label pairs within each Metric. Sorting is not required for the most
-// frequent use of this method, which is sample ingestion in the Prometheus
-// server. However, for presentation purposes, you might want to sort the
-// metrics, and in some cases, you must sort the labels, e.g. for consumption by
-// the metric family injection hook of the Prometheus registry.
-//
-// Summaries and histograms are rather special beasts. You would probably not
-// use them in the simple text format anyway. This method can deal with
-// summaries and histograms if they are presented in exactly the way the
-// text.Create function creates them.
-//
-// This method must not be called concurrently. If you want to parse different
-// input concurrently, instantiate a separate Parser for each goroutine.
-func (p *TextParser) TextToMetricFamilies(in io.Reader) (map[string]*dto.MetricFamily, error) {
- p.reset(in)
- for nextState := p.startOfLine; nextState != nil; nextState = nextState() {
- // Magic happens here...
- }
- // Get rid of empty metric families.
- for k, mf := range p.metricFamiliesByName {
- if len(mf.GetMetric()) == 0 {
- delete(p.metricFamiliesByName, k)
- }
- }
- // If p.err is io.EOF now, we have run into a premature end of the input
- // stream. Turn this error into something nicer and more
- // meaningful. (io.EOF is often used as a signal for the legitimate end
- // of an input stream.)
- if p.err == io.EOF {
- p.parseError("unexpected end of input stream")
- }
- return p.metricFamiliesByName, p.err
-}
-
-func (p *TextParser) reset(in io.Reader) {
- p.metricFamiliesByName = map[string]*dto.MetricFamily{}
- if p.buf == nil {
- p.buf = bufio.NewReader(in)
- } else {
- p.buf.Reset(in)
- }
- p.err = nil
- p.lineCount = 0
- if p.summaries == nil || len(p.summaries) > 0 {
- p.summaries = map[uint64]*dto.Metric{}
- }
- if p.histograms == nil || len(p.histograms) > 0 {
- p.histograms = map[uint64]*dto.Metric{}
- }
- p.currentQuantile = math.NaN()
- p.currentBucket = math.NaN()
-}
-
-// startOfLine represents the state where the next byte read from p.buf is the
-// start of a line (or whitespace leading up to it).
-func (p *TextParser) startOfLine() stateFn {
- p.lineCount++
- if p.skipBlankTab(); p.err != nil {
- // End of input reached. This is the only case where
- // that is not an error but a signal that we are done.
- p.err = nil
- return nil
- }
- switch p.currentByte {
- case '#':
- return p.startComment
- case '\n':
- return p.startOfLine // Empty line, start the next one.
- }
- return p.readingMetricName
-}
-
-// startComment represents the state where the next byte read from p.buf is the
-// start of a comment (or whitespace leading up to it).
-func (p *TextParser) startComment() stateFn {
- if p.skipBlankTab(); p.err != nil {
- return nil // Unexpected end of input.
- }
- if p.currentByte == '\n' {
- return p.startOfLine
- }
- if p.readTokenUntilWhitespace(); p.err != nil {
- return nil // Unexpected end of input.
- }
- // If we have hit the end of line already, there is nothing left
- // to do. This is not considered a syntax error.
- if p.currentByte == '\n' {
- return p.startOfLine
- }
- keyword := p.currentToken.String()
- if keyword != "HELP" && keyword != "TYPE" {
- // Generic comment, ignore by fast forwarding to end of line.
- for p.currentByte != '\n' {
- if p.currentByte, p.err = p.buf.ReadByte(); p.err != nil {
- return nil // Unexpected end of input.
- }
- }
- return p.startOfLine
- }
- // There is something. Next has to be a metric name.
- if p.skipBlankTab(); p.err != nil {
- return nil // Unexpected end of input.
- }
- if p.readTokenAsMetricName(); p.err != nil {
- return nil // Unexpected end of input.
- }
- if p.currentByte == '\n' {
- // At the end of the line already.
- // Again, this is not considered a syntax error.
- return p.startOfLine
- }
- if !isBlankOrTab(p.currentByte) {
- p.parseError("invalid metric name in comment")
- return nil
- }
- p.setOrCreateCurrentMF()
- if p.skipBlankTab(); p.err != nil {
- return nil // Unexpected end of input.
- }
- if p.currentByte == '\n' {
- // At the end of the line already.
- // Again, this is not considered a syntax error.
- return p.startOfLine
- }
- switch keyword {
- case "HELP":
- return p.readingHelp
- case "TYPE":
- return p.readingType
- }
- panic(fmt.Sprintf("code error: unexpected keyword %q", keyword))
-}
-
-// readingMetricName represents the state where the last byte read (now in
-// p.currentByte) is the first byte of a metric name.
-func (p *TextParser) readingMetricName() stateFn {
- if p.readTokenAsMetricName(); p.err != nil {
- return nil
- }
- if p.currentToken.Len() == 0 {
- p.parseError("invalid metric name")
- return nil
- }
- p.setOrCreateCurrentMF()
- // Now is the time to fix the type if it hasn't happened yet.
- if p.currentMF.Type == nil {
- p.currentMF.Type = dto.MetricType_UNTYPED.Enum()
- }
- p.currentMetric = &dto.Metric{}
- // Do not append the newly created currentMetric to
- // currentMF.Metric right now. First wait if this is a summary,
- // and the metric exists already, which we can only know after
- // having read all the labels.
- if p.skipBlankTabIfCurrentBlankTab(); p.err != nil {
- return nil // Unexpected end of input.
- }
- return p.readingLabels
-}
-
-// readingLabels represents the state where the last byte read (now in
-// p.currentByte) is either the first byte of the label set (i.e. a '{'), or the
-// first byte of the value (otherwise).
-func (p *TextParser) readingLabels() stateFn {
- // Summaries/histograms are special. We have to reset the
- // currentLabels map, currentQuantile and currentBucket before starting to
- // read labels.
- if p.currentMF.GetType() == dto.MetricType_SUMMARY || p.currentMF.GetType() == dto.MetricType_HISTOGRAM {
- p.currentLabels = map[string]string{}
- p.currentLabels[string(model.MetricNameLabel)] = p.currentMF.GetName()
- p.currentQuantile = math.NaN()
- p.currentBucket = math.NaN()
- }
- if p.currentByte != '{' {
- return p.readingValue
- }
- return p.startLabelName
-}
-
-// startLabelName represents the state where the next byte read from p.buf is
-// the start of a label name (or whitespace leading up to it).
-func (p *TextParser) startLabelName() stateFn {
- if p.skipBlankTab(); p.err != nil {
- return nil // Unexpected end of input.
- }
- if p.currentByte == '}' {
- if p.skipBlankTab(); p.err != nil {
- return nil // Unexpected end of input.
- }
- return p.readingValue
- }
- if p.readTokenAsLabelName(); p.err != nil {
- return nil // Unexpected end of input.
- }
- if p.currentToken.Len() == 0 {
- p.parseError(fmt.Sprintf("invalid label name for metric %q", p.currentMF.GetName()))
- return nil
- }
- p.currentLabelPair = &dto.LabelPair{Name: proto.String(p.currentToken.String())}
- if p.currentLabelPair.GetName() == string(model.MetricNameLabel) {
- p.parseError(fmt.Sprintf("label name %q is reserved", model.MetricNameLabel))
- return nil
- }
- // Special summary/histogram treatment. Don't add 'quantile' and 'le'
- // labels to 'real' labels.
- if !(p.currentMF.GetType() == dto.MetricType_SUMMARY && p.currentLabelPair.GetName() == model.QuantileLabel) &&
- !(p.currentMF.GetType() == dto.MetricType_HISTOGRAM && p.currentLabelPair.GetName() == model.BucketLabel) {
- p.currentMetric.Label = append(p.currentMetric.Label, p.currentLabelPair)
- }
- if p.skipBlankTabIfCurrentBlankTab(); p.err != nil {
- return nil // Unexpected end of input.
- }
- if p.currentByte != '=' {
- p.parseError(fmt.Sprintf("expected '=' after label name, found %q", p.currentByte))
- return nil
- }
- return p.startLabelValue
-}
-
-// startLabelValue represents the state where the next byte read from p.buf is
-// the start of a (quoted) label value (or whitespace leading up to it).
-func (p *TextParser) startLabelValue() stateFn {
- if p.skipBlankTab(); p.err != nil {
- return nil // Unexpected end of input.
- }
- if p.currentByte != '"' {
- p.parseError(fmt.Sprintf("expected '\"' at start of label value, found %q", p.currentByte))
- return nil
- }
- if p.readTokenAsLabelValue(); p.err != nil {
- return nil
- }
- p.currentLabelPair.Value = proto.String(p.currentToken.String())
- // Special treatment of summaries:
- // - Quantile labels are special, will result in dto.Quantile later.
- // - Other labels have to be added to currentLabels for signature calculation.
- if p.currentMF.GetType() == dto.MetricType_SUMMARY {
- if p.currentLabelPair.GetName() == model.QuantileLabel {
- if p.currentQuantile, p.err = strconv.ParseFloat(p.currentLabelPair.GetValue(), 64); p.err != nil {
- // Create a more helpful error message.
- p.parseError(fmt.Sprintf("expected float as value for 'quantile' label, got %q", p.currentLabelPair.GetValue()))
- return nil
- }
- } else {
- p.currentLabels[p.currentLabelPair.GetName()] = p.currentLabelPair.GetValue()
- }
- }
- // Similar special treatment of histograms.
- if p.currentMF.GetType() == dto.MetricType_HISTOGRAM {
- if p.currentLabelPair.GetName() == model.BucketLabel {
- if p.currentBucket, p.err = strconv.ParseFloat(p.currentLabelPair.GetValue(), 64); p.err != nil {
- // Create a more helpful error message.
- p.parseError(fmt.Sprintf("expected float as value for 'le' label, got %q", p.currentLabelPair.GetValue()))
- return nil
- }
- } else {
- p.currentLabels[p.currentLabelPair.GetName()] = p.currentLabelPair.GetValue()
- }
- }
- if p.skipBlankTab(); p.err != nil {
- return nil // Unexpected end of input.
- }
- switch p.currentByte {
- case ',':
- return p.startLabelName
-
- case '}':
- if p.skipBlankTab(); p.err != nil {
- return nil // Unexpected end of input.
- }
- return p.readingValue
- default:
- p.parseError(fmt.Sprintf("unexpected end of label value %q", p.currentLabelPair.Value))
- return nil
- }
-}
-
-// readingValue represents the state where the last byte read (now in
-// p.currentByte) is the first byte of the sample value (i.e. a float).
-func (p *TextParser) readingValue() stateFn {
- // When we are here, we have read all the labels, so for the
- // special case of a summary/histogram, we can finally find out
- // if the metric already exists.
- if p.currentMF.GetType() == dto.MetricType_SUMMARY {
- signature := model.LabelsToSignature(p.currentLabels)
- if summary := p.summaries[signature]; summary != nil {
- p.currentMetric = summary
- } else {
- p.summaries[signature] = p.currentMetric
- p.currentMF.Metric = append(p.currentMF.Metric, p.currentMetric)
- }
- } else if p.currentMF.GetType() == dto.MetricType_HISTOGRAM {
- signature := model.LabelsToSignature(p.currentLabels)
- if histogram := p.histograms[signature]; histogram != nil {
- p.currentMetric = histogram
- } else {
- p.histograms[signature] = p.currentMetric
- p.currentMF.Metric = append(p.currentMF.Metric, p.currentMetric)
- }
- } else {
- p.currentMF.Metric = append(p.currentMF.Metric, p.currentMetric)
- }
- if p.readTokenUntilWhitespace(); p.err != nil {
- return nil // Unexpected end of input.
- }
- value, err := strconv.ParseFloat(p.currentToken.String(), 64)
- if err != nil {
- // Create a more helpful error message.
- p.parseError(fmt.Sprintf("expected float as value, got %q", p.currentToken.String()))
- return nil
- }
- switch p.currentMF.GetType() {
- case dto.MetricType_COUNTER:
- p.currentMetric.Counter = &dto.Counter{Value: proto.Float64(value)}
- case dto.MetricType_GAUGE:
- p.currentMetric.Gauge = &dto.Gauge{Value: proto.Float64(value)}
- case dto.MetricType_UNTYPED:
- p.currentMetric.Untyped = &dto.Untyped{Value: proto.Float64(value)}
- case dto.MetricType_SUMMARY:
- // *sigh*
- if p.currentMetric.Summary == nil {
- p.currentMetric.Summary = &dto.Summary{}
- }
- switch {
- case p.currentIsSummaryCount:
- p.currentMetric.Summary.SampleCount = proto.Uint64(uint64(value))
- case p.currentIsSummarySum:
- p.currentMetric.Summary.SampleSum = proto.Float64(value)
- case !math.IsNaN(p.currentQuantile):
- p.currentMetric.Summary.Quantile = append(
- p.currentMetric.Summary.Quantile,
- &dto.Quantile{
- Quantile: proto.Float64(p.currentQuantile),
- Value: proto.Float64(value),
- },
- )
- }
- case dto.MetricType_HISTOGRAM:
- // *sigh*
- if p.currentMetric.Histogram == nil {
- p.currentMetric.Histogram = &dto.Histogram{}
- }
- switch {
- case p.currentIsHistogramCount:
- p.currentMetric.Histogram.SampleCount = proto.Uint64(uint64(value))
- case p.currentIsHistogramSum:
- p.currentMetric.Histogram.SampleSum = proto.Float64(value)
- case !math.IsNaN(p.currentBucket):
- p.currentMetric.Histogram.Bucket = append(
- p.currentMetric.Histogram.Bucket,
- &dto.Bucket{
- UpperBound: proto.Float64(p.currentBucket),
- CumulativeCount: proto.Uint64(uint64(value)),
- },
- )
- }
- default:
- p.err = fmt.Errorf("unexpected type for metric name %q", p.currentMF.GetName())
- }
- if p.currentByte == '\n' {
- return p.startOfLine
- }
- return p.startTimestamp
-}
-
-// startTimestamp represents the state where the next byte read from p.buf is
-// the start of the timestamp (or whitespace leading up to it).
-func (p *TextParser) startTimestamp() stateFn {
- if p.skipBlankTab(); p.err != nil {
- return nil // Unexpected end of input.
- }
- if p.readTokenUntilWhitespace(); p.err != nil {
- return nil // Unexpected end of input.
- }
- timestamp, err := strconv.ParseInt(p.currentToken.String(), 10, 64)
- if err != nil {
- // Create a more helpful error message.
- p.parseError(fmt.Sprintf("expected integer as timestamp, got %q", p.currentToken.String()))
- return nil
- }
- p.currentMetric.TimestampMs = proto.Int64(timestamp)
- if p.readTokenUntilNewline(false); p.err != nil {
- return nil // Unexpected end of input.
- }
- if p.currentToken.Len() > 0 {
- p.parseError(fmt.Sprintf("spurious string after timestamp: %q", p.currentToken.String()))
- return nil
- }
- return p.startOfLine
-}
-
-// readingHelp represents the state where the last byte read (now in
-// p.currentByte) is the first byte of the docstring after 'HELP'.
-func (p *TextParser) readingHelp() stateFn {
- if p.currentMF.Help != nil {
- p.parseError(fmt.Sprintf("second HELP line for metric name %q", p.currentMF.GetName()))
- return nil
- }
- // Rest of line is the docstring.
- if p.readTokenUntilNewline(true); p.err != nil {
- return nil // Unexpected end of input.
- }
- p.currentMF.Help = proto.String(p.currentToken.String())
- return p.startOfLine
-}
-
-// readingType represents the state where the last byte read (now in
-// p.currentByte) is the first byte of the type hint after 'HELP'.
-func (p *TextParser) readingType() stateFn {
- if p.currentMF.Type != nil {
- p.parseError(fmt.Sprintf("second TYPE line for metric name %q, or TYPE reported after samples", p.currentMF.GetName()))
- return nil
- }
- // Rest of line is the type.
- if p.readTokenUntilNewline(false); p.err != nil {
- return nil // Unexpected end of input.
- }
- metricType, ok := dto.MetricType_value[strings.ToUpper(p.currentToken.String())]
- if !ok {
- p.parseError(fmt.Sprintf("unknown metric type %q", p.currentToken.String()))
- return nil
- }
- p.currentMF.Type = dto.MetricType(metricType).Enum()
- return p.startOfLine
-}
-
-// parseError sets p.err to a ParseError at the current line with the given
-// message.
-func (p *TextParser) parseError(msg string) {
- p.err = ParseError{
- Line: p.lineCount,
- Msg: msg,
- }
-}
-
-// skipBlankTab reads (and discards) bytes from p.buf until it encounters a byte
-// that is neither ' ' nor '\t'. That byte is left in p.currentByte.
-func (p *TextParser) skipBlankTab() {
- for {
- if p.currentByte, p.err = p.buf.ReadByte(); p.err != nil || !isBlankOrTab(p.currentByte) {
- return
- }
- }
-}
-
-// skipBlankTabIfCurrentBlankTab works exactly as skipBlankTab but doesn't do
-// anything if p.currentByte is neither ' ' nor '\t'.
-func (p *TextParser) skipBlankTabIfCurrentBlankTab() {
- if isBlankOrTab(p.currentByte) {
- p.skipBlankTab()
- }
-}
-
-// readTokenUntilWhitespace copies bytes from p.buf into p.currentToken. The
-// first byte considered is the byte already read (now in p.currentByte). The
-// first whitespace byte encountered is still copied into p.currentByte, but not
-// into p.currentToken.
-func (p *TextParser) readTokenUntilWhitespace() {
- p.currentToken.Reset()
- for p.err == nil && !isBlankOrTab(p.currentByte) && p.currentByte != '\n' {
- p.currentToken.WriteByte(p.currentByte)
- p.currentByte, p.err = p.buf.ReadByte()
- }
-}
-
-// readTokenUntilNewline copies bytes from p.buf into p.currentToken. The first
-// byte considered is the byte already read (now in p.currentByte). The first
-// newline byte encountered is still copied into p.currentByte, but not into
-// p.currentToken. If recognizeEscapeSequence is true, two escape sequences are
-// recognized: '\\' tranlates into '\', and '\n' into a line-feed character. All
-// other escape sequences are invalid and cause an error.
-func (p *TextParser) readTokenUntilNewline(recognizeEscapeSequence bool) {
- p.currentToken.Reset()
- escaped := false
- for p.err == nil {
- if recognizeEscapeSequence && escaped {
- switch p.currentByte {
- case '\\':
- p.currentToken.WriteByte(p.currentByte)
- case 'n':
- p.currentToken.WriteByte('\n')
- default:
- p.parseError(fmt.Sprintf("invalid escape sequence '\\%c'", p.currentByte))
- return
- }
- escaped = false
- } else {
- switch p.currentByte {
- case '\n':
- return
- case '\\':
- escaped = true
- default:
- p.currentToken.WriteByte(p.currentByte)
- }
- }
- p.currentByte, p.err = p.buf.ReadByte()
- }
-}
-
-// readTokenAsMetricName copies a metric name from p.buf into p.currentToken.
-// The first byte considered is the byte already read (now in p.currentByte).
-// The first byte not part of a metric name is still copied into p.currentByte,
-// but not into p.currentToken.
-func (p *TextParser) readTokenAsMetricName() {
- p.currentToken.Reset()
- if !isValidMetricNameStart(p.currentByte) {
- return
- }
- for {
- p.currentToken.WriteByte(p.currentByte)
- p.currentByte, p.err = p.buf.ReadByte()
- if p.err != nil || !isValidMetricNameContinuation(p.currentByte) {
- return
- }
- }
-}
-
-// readTokenAsLabelName copies a label name from p.buf into p.currentToken.
-// The first byte considered is the byte already read (now in p.currentByte).
-// The first byte not part of a label name is still copied into p.currentByte,
-// but not into p.currentToken.
-func (p *TextParser) readTokenAsLabelName() {
- p.currentToken.Reset()
- if !isValidLabelNameStart(p.currentByte) {
- return
- }
- for {
- p.currentToken.WriteByte(p.currentByte)
- p.currentByte, p.err = p.buf.ReadByte()
- if p.err != nil || !isValidLabelNameContinuation(p.currentByte) {
- return
- }
- }
-}
-
-// readTokenAsLabelValue copies a label value from p.buf into p.currentToken.
-// In contrast to the other 'readTokenAs...' functions, which start with the
-// last read byte in p.currentByte, this method ignores p.currentByte and starts
-// with reading a new byte from p.buf. The first byte not part of a label value
-// is still copied into p.currentByte, but not into p.currentToken.
-func (p *TextParser) readTokenAsLabelValue() {
- p.currentToken.Reset()
- escaped := false
- for {
- if p.currentByte, p.err = p.buf.ReadByte(); p.err != nil {
- return
- }
- if escaped {
- switch p.currentByte {
- case '"', '\\':
- p.currentToken.WriteByte(p.currentByte)
- case 'n':
- p.currentToken.WriteByte('\n')
- default:
- p.parseError(fmt.Sprintf("invalid escape sequence '\\%c'", p.currentByte))
- return
- }
- escaped = false
- continue
- }
- switch p.currentByte {
- case '"':
- return
- case '\n':
- p.parseError(fmt.Sprintf("label value %q contains unescaped new-line", p.currentToken.String()))
- return
- case '\\':
- escaped = true
- default:
- p.currentToken.WriteByte(p.currentByte)
- }
- }
-}
-
-func (p *TextParser) setOrCreateCurrentMF() {
- p.currentIsSummaryCount = false
- p.currentIsSummarySum = false
- p.currentIsHistogramCount = false
- p.currentIsHistogramSum = false
- name := p.currentToken.String()
- if p.currentMF = p.metricFamiliesByName[name]; p.currentMF != nil {
- return
- }
- // Try out if this is a _sum or _count for a summary/histogram.
- summaryName := summaryMetricName(name)
- if p.currentMF = p.metricFamiliesByName[summaryName]; p.currentMF != nil {
- if p.currentMF.GetType() == dto.MetricType_SUMMARY {
- if isCount(name) {
- p.currentIsSummaryCount = true
- }
- if isSum(name) {
- p.currentIsSummarySum = true
- }
- return
- }
- }
- histogramName := histogramMetricName(name)
- if p.currentMF = p.metricFamiliesByName[histogramName]; p.currentMF != nil {
- if p.currentMF.GetType() == dto.MetricType_HISTOGRAM {
- if isCount(name) {
- p.currentIsHistogramCount = true
- }
- if isSum(name) {
- p.currentIsHistogramSum = true
- }
- return
- }
- }
- p.currentMF = &dto.MetricFamily{Name: proto.String(name)}
- p.metricFamiliesByName[name] = p.currentMF
-}
-
-func isValidLabelNameStart(b byte) bool {
- return (b >= 'a' && b <= 'z') || (b >= 'A' && b <= 'Z') || b == '_'
-}
-
-func isValidLabelNameContinuation(b byte) bool {
- return isValidLabelNameStart(b) || (b >= '0' && b <= '9')
-}
-
-func isValidMetricNameStart(b byte) bool {
- return isValidLabelNameStart(b) || b == ':'
-}
-
-func isValidMetricNameContinuation(b byte) bool {
- return isValidLabelNameContinuation(b) || b == ':'
-}
-
-func isBlankOrTab(b byte) bool {
- return b == ' ' || b == '\t'
-}
-
-func isCount(name string) bool {
- return len(name) > 6 && name[len(name)-6:] == "_count"
-}
-
-func isSum(name string) bool {
- return len(name) > 4 && name[len(name)-4:] == "_sum"
-}
-
-func isBucket(name string) bool {
- return len(name) > 7 && name[len(name)-7:] == "_bucket"
-}
-
-func summaryMetricName(name string) string {
- switch {
- case isCount(name):
- return name[:len(name)-6]
- case isSum(name):
- return name[:len(name)-4]
- default:
- return name
- }
-}
-
-func histogramMetricName(name string) string {
- switch {
- case isCount(name):
- return name[:len(name)-6]
- case isSum(name):
- return name[:len(name)-4]
- case isBucket(name):
- return name[:len(name)-7]
- default:
- return name
- }
-}