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asm_aix_ppc64.sbyteorder.gocpu.gocpu_aix.gocpu_arm.gocpu_arm64.gocpu_arm64.scpu_gc_arm64.gocpu_gc_s390x.gocpu_gc_x86.gocpu_gccgo_arm64.gocpu_gccgo_s390x.gocpu_gccgo_x86.ccpu_gccgo_x86.gocpu_linux.gocpu_linux_arm.gocpu_linux_arm64.gocpu_linux_mips64x.gocpu_linux_noinit.gocpu_linux_ppc64x.gocpu_linux_s390x.gocpu_loong64.gocpu_mips64x.gocpu_mipsx.gocpu_netbsd_arm64.gocpu_openbsd_arm64.gocpu_openbsd_arm64.scpu_other_arm.gocpu_other_arm64.gocpu_other_mips64x.gocpu_other_ppc64x.gocpu_other_riscv64.gocpu_ppc64x.gocpu_riscv64.gocpu_s390x.gocpu_s390x.scpu_wasm.gocpu_x86.gocpu_x86.scpu_zos.gocpu_zos_s390x.goendian_big.goendian_little.gohwcap_linux.goparse.goproc_cpuinfo_linux.goruntime_auxv.goruntime_auxv_go121.gosyscall_aix_gccgo.gosyscall_aix_ppc64_gc.go
execabs
plan9
asm.sasm_plan9_386.sasm_plan9_amd64.sasm_plan9_arm.sconst_plan9.godir_plan9.goenv_plan9.goerrors_plan9.gomkall.shmkerrors.shmksysnum_plan9.shpwd_go15_plan9.gopwd_plan9.gorace.gorace0.gostr.gosyscall.gosyscall_plan9.gozsyscall_plan9_386.gozsyscall_plan9_amd64.gozsyscall_plan9_arm.gozsysnum_plan9.go
unix
.gitignoreREADME.mdaffinity_linux.goaliases.goasm_aix_ppc64.sasm_bsd_386.sasm_bsd_amd64.sasm_bsd_arm.sasm_bsd_arm64.sasm_bsd_ppc64.sasm_bsd_riscv64.sasm_linux_386.sasm_linux_amd64.sasm_linux_arm.sasm_linux_arm64.sasm_linux_loong64.sasm_linux_mips64x.sasm_linux_mipsx.sasm_linux_ppc64x.sasm_linux_riscv64.sasm_linux_s390x.sasm_openbsd_mips64.sasm_solaris_amd64.sasm_zos_s390x.sbluetooth_linux.gobpxsvc_zos.gobpxsvc_zos.scap_freebsd.goconstants.godev_aix_ppc.godev_aix_ppc64.godev_darwin.godev_dragonfly.godev_freebsd.godev_linux.godev_netbsd.godev_openbsd.godev_zos.godirent.goendian_big.goendian_little.goenv_unix.gofcntl.gofcntl_darwin.gofcntl_linux_32bit.gofdset.gogccgo.gogccgo_c.cgccgo_linux_amd64.goifreq_linux.goioctl_linux.goioctl_signed.goioctl_unsigned.goioctl_zos.gomkall.shmkerrors.shmmap_nomremap.gomremap.gopagesize_unix.gopledge_openbsd.goptrace_darwin.goptrace_ios.gorace.gorace0.goreaddirent_getdents.goreaddirent_getdirentries.gosockcmsg_dragonfly.gosockcmsg_linux.gosockcmsg_unix.gosockcmsg_unix_other.gosockcmsg_zos.gosymaddr_zos_s390x.ssyscall.gosyscall_aix.gosyscall_aix_ppc.gosyscall_aix_ppc64.gosyscall_bsd.gosyscall_darwin.gosyscall_darwin_amd64.gosyscall_darwin_arm64.gosyscall_darwin_libSystem.gosyscall_dragonfly.gosyscall_dragonfly_amd64.gosyscall_freebsd.gosyscall_freebsd_386.gosyscall_freebsd_amd64.gosyscall_freebsd_arm.gosyscall_freebsd_arm64.gosyscall_freebsd_riscv64.gosyscall_hurd.gosyscall_hurd_386.gosyscall_illumos.gosyscall_linux.gosyscall_linux_386.gosyscall_linux_alarm.gosyscall_linux_amd64.gosyscall_linux_amd64_gc.gosyscall_linux_arm.gosyscall_linux_arm64.gosyscall_linux_gc.gosyscall_linux_gc_386.gosyscall_linux_gc_arm.gosyscall_linux_gccgo_386.gosyscall_linux_gccgo_arm.gosyscall_linux_loong64.gosyscall_linux_mips64x.gosyscall_linux_mipsx.gosyscall_linux_ppc.gosyscall_linux_ppc64x.gosyscall_linux_riscv64.gosyscall_linux_s390x.gosyscall_linux_sparc64.gosyscall_netbsd.gosyscall_netbsd_386.gosyscall_netbsd_amd64.gosyscall_netbsd_arm.gosyscall_netbsd_arm64.gosyscall_openbsd.gosyscall_openbsd_386.gosyscall_openbsd_amd64.gosyscall_openbsd_arm.gosyscall_openbsd_arm64.gosyscall_openbsd_libc.gosyscall_openbsd_mips64.gosyscall_openbsd_ppc64.gosyscall_openbsd_riscv64.gosyscall_solaris.gosyscall_solaris_amd64.gosyscall_unix.gosyscall_unix_gc.gosyscall_unix_gc_ppc64x.gosyscall_zos_s390x.gosysvshm_linux.gosysvshm_unix.gosysvshm_unix_other.gotimestruct.gounveil_openbsd.goxattr_bsd.gozerrors_aix_ppc.gozerrors_aix_ppc64.gozerrors_darwin_amd64.gozerrors_darwin_arm64.gozerrors_dragonfly_amd64.gozerrors_freebsd_386.gozerrors_freebsd_amd64.gozerrors_freebsd_arm.gozerrors_freebsd_arm64.gozerrors_freebsd_riscv64.gozerrors_linux.gozerrors_linux_386.gozerrors_linux_amd64.gozerrors_linux_arm.gozerrors_linux_arm64.gozerrors_linux_loong64.gozerrors_linux_mips.gozerrors_linux_mips64.gozerrors_linux_mips64le.gozerrors_linux_mipsle.gozerrors_linux_ppc.gozerrors_linux_ppc64.gozerrors_linux_ppc64le.gozerrors_linux_riscv64.gozerrors_linux_s390x.gozerrors_linux_sparc64.gozerrors_netbsd_386.gozerrors_netbsd_amd64.gozerrors_netbsd_arm.gozerrors_netbsd_arm64.gozerrors_openbsd_386.gozerrors_openbsd_amd64.gozerrors_openbsd_arm.gozerrors_openbsd_arm64.gozerrors_openbsd_mips64.gozerrors_openbsd_ppc64.gozerrors_openbsd_riscv64.gozerrors_solaris_amd64.gozerrors_zos_s390x.gozptrace_armnn_linux.gozptrace_linux_arm64.gozptrace_mipsnn_linux.gozptrace_mipsnnle_linux.gozptrace_x86_linux.gozsymaddr_zos_s390x.szsyscall_aix_ppc.gozsyscall_aix_ppc64.gozsyscall_aix_ppc64_gc.gozsyscall_aix_ppc64_gccgo.gozsyscall_darwin_amd64.gozsyscall_darwin_amd64.szsyscall_darwin_arm64.gozsyscall_darwin_arm64.szsyscall_dragonfly_amd64.gozsyscall_freebsd_386.gozsyscall_freebsd_amd64.gozsyscall_freebsd_arm.gozsyscall_freebsd_arm64.gozsyscall_freebsd_riscv64.gozsyscall_illumos_amd64.gozsyscall_linux.gozsyscall_linux_386.gozsyscall_linux_amd64.gozsyscall_linux_arm.gozsyscall_linux_arm64.gozsyscall_linux_loong64.gozsyscall_linux_mips.gozsyscall_linux_mips64.gozsyscall_linux_mips64le.gozsyscall_linux_mipsle.gozsyscall_linux_ppc.gozsyscall_linux_ppc64.gozsyscall_linux_ppc64le.gozsyscall_linux_riscv64.gozsyscall_linux_s390x.gozsyscall_linux_sparc64.gozsyscall_netbsd_386.gozsyscall_netbsd_amd64.gozsyscall_netbsd_arm.gozsyscall_netbsd_arm64.gozsyscall_openbsd_386.gozsyscall_openbsd_386.szsyscall_openbsd_amd64.gozsyscall_openbsd_amd64.szsyscall_openbsd_arm.gozsyscall_openbsd_arm.szsyscall_openbsd_arm64.gozsyscall_openbsd_arm64.szsyscall_openbsd_mips64.gozsyscall_openbsd_mips64.szsyscall_openbsd_ppc64.gozsyscall_openbsd_ppc64.szsyscall_openbsd_riscv64.gozsyscall_openbsd_riscv64.szsyscall_solaris_amd64.gozsyscall_zos_s390x.gozsysctl_openbsd_386.gozsysctl_openbsd_amd64.gozsysctl_openbsd_arm.gozsysctl_openbsd_arm64.gozsysctl_openbsd_mips64.gozsysctl_openbsd_ppc64.gozsysctl_openbsd_riscv64.gozsysnum_darwin_amd64.gozsysnum_darwin_arm64.gozsysnum_dragonfly_amd64.gozsysnum_freebsd_386.gozsysnum_freebsd_amd64.gozsysnum_freebsd_arm.gozsysnum_freebsd_arm64.gozsysnum_freebsd_riscv64.gozsysnum_linux_386.gozsysnum_linux_amd64.gozsysnum_linux_arm.gozsysnum_linux_arm64.gozsysnum_linux_loong64.gozsysnum_linux_mips.gozsysnum_linux_mips64.gozsysnum_linux_mips64le.gozsysnum_linux_mipsle.gozsysnum_linux_ppc.gozsysnum_linux_ppc64.gozsysnum_linux_ppc64le.gozsysnum_linux_riscv64.gozsysnum_linux_s390x.gozsysnum_linux_sparc64.gozsysnum_netbsd_386.gozsysnum_netbsd_amd64.gozsysnum_netbsd_arm.gozsysnum_netbsd_arm64.gozsysnum_openbsd_386.gozsysnum_openbsd_amd64.gozsysnum_openbsd_arm.gozsysnum_openbsd_arm64.gozsysnum_openbsd_mips64.gozsysnum_openbsd_ppc64.gozsysnum_openbsd_riscv64.gozsysnum_zos_s390x.goztypes_aix_ppc.goztypes_aix_ppc64.goztypes_darwin_amd64.goztypes_darwin_arm64.goztypes_dragonfly_amd64.goztypes_freebsd_386.goztypes_freebsd_amd64.goztypes_freebsd_arm.goztypes_freebsd_arm64.goztypes_freebsd_riscv64.goztypes_linux.goztypes_linux_386.goztypes_linux_amd64.goztypes_linux_arm.goztypes_linux_arm64.goztypes_linux_loong64.goztypes_linux_mips.goztypes_linux_mips64.goztypes_linux_mips64le.goztypes_linux_mipsle.goztypes_linux_ppc.goztypes_linux_ppc64.goztypes_linux_ppc64le.goztypes_linux_riscv64.goztypes_linux_s390x.goztypes_linux_sparc64.goztypes_netbsd_386.goztypes_netbsd_amd64.goztypes_netbsd_arm.goztypes_netbsd_arm64.goztypes_openbsd_386.goztypes_openbsd_amd64.goztypes_openbsd_arm.goztypes_openbsd_arm64.goztypes_openbsd_mips64.goztypes_openbsd_ppc64.goztypes_openbsd_riscv64.goztypes_solaris_amd64.goztypes_zos_s390x.go
windows
aliases.godll_windows.goenv_windows.goeventlog.goexec_windows.gomemory_windows.gomkerrors.bashmkknownfolderids.bashmksyscall.gorace.gorace0.go
registry
security_windows.goservice.gosetupapi_windows.gostr.gosyscall.gosyscall_windows.gotypes_windows.gotypes_windows_386.gotypes_windows_amd64.gotypes_windows_arm.gotypes_windows_arm64.gozerrors_windows.gozknownfolderids_windows.gozsyscall_windows.goterm
CONTRIBUTING.mdLICENSEPATENTSREADME.mdcodereview.cfgterm.goterm_plan9.goterm_unix.goterm_unix_bsd.goterm_unix_other.goterm_unsupported.goterm_windows.goterminal.go
text
LICENSEPATENTS
cases
cases.gocontext.gofold.goicu.goinfo.gomap.gotables10.0.0.gotables11.0.0.gotables12.0.0.gotables13.0.0.gotables15.0.0.gotables9.0.0.gotrieval.go
internal
internal.go
language
match.gotag
language
secure
transform
unicode
bidi
bidi.gobracket.gocore.goprop.gotables10.0.0.gotables11.0.0.gotables12.0.0.gotables13.0.0.gotables15.0.0.gotables9.0.0.gotrieval.go
norm
width
time
google.golang.org
genproto
googleapis
grpc
AUTHORSCODE-OF-CONDUCT.mdCONTRIBUTING.mdGOVERNANCE.mdLICENSEMAINTAINERS.mdMakefileNOTICE.txtREADME.mdSECURITY.mdcall.gointerceptor.go
attributes
backoff.gobackoff
balancer
balancer_wrapper.gobinarylog
grpc_binarylog_v1
channelz
clientconn.gocodec.gocodes
connectivity
credentials
dialoptions.godoc.goencoding
grpclog
health
grpc_health_v1
internal
backoff
balancer
gracefulswitch
balancerload
binarylog
buffer
channelz
channel.gochannelmap.gofuncs.gologging.goserver.gosocket.gosubchannel.gosyscall_linux.gosyscall_nonlinux.gotrace.go
credentials
envconfig
experimental.gogrpclog
grpcsync
grpcutil
idle
internal.gometadata
pretty
resolver
serviceconfig
status
syscall
tcp_keepalive_others.gotcp_keepalive_unix.gotcp_keepalive_windows.gotransport
keepalive
metadata
peer
picker_wrapper.gopreloader.goregenerate.shresolver
resolver_wrapper.gorpc_util.goserver.goservice_config.goserviceconfig
shared_buffer_pool.gostats
status
stream.gostream_interfaces.gotap
trace.gotrace_notrace.gotrace_withtrace.goversion.goprotobuf
LICENSEPATENTS
encoding
protodelim
protojson
prototext
protowire
internal
descfmt
descopts
detrand
editiondefaults
encoding
defval
json
messageset
tag
text
errors
filedesc
filetype
flags
genid
any_gen.goapi_gen.godescriptor_gen.godoc.goduration_gen.goempty_gen.gofield_mask_gen.gogo_features_gen.gogoname.gomap_entry.gosource_context_gen.gostruct_gen.gotimestamp_gen.gotype_gen.gowrappers.gowrappers_gen.go
impl
api_export.gocheckinit.gocodec_extension.gocodec_field.gocodec_gen.gocodec_map.gocodec_map_go111.gocodec_map_go112.gocodec_message.gocodec_messageset.gocodec_reflect.gocodec_tables.gocodec_unsafe.goconvert.goconvert_list.goconvert_map.godecode.goencode.goenum.goextension.golegacy_enum.golegacy_export.golegacy_extension.golegacy_file.golegacy_message.gomerge.gomerge_gen.gomessage.gomessage_reflect.gomessage_reflect_field.gomessage_reflect_gen.gopointer_reflect.gopointer_unsafe.govalidate.goweak.go
order
pragma
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strs
version
proto
checkinit.godecode.godecode_gen.godoc.goencode.goencode_gen.goequal.goextension.gomerge.gomessageset.goproto.goproto_methods.goproto_reflect.goreset.gosize.gosize_gen.gowrappers.go
protoadapt
reflect
protoreflect
methods.goproto.gosource.gosource_gen.gotype.govalue.govalue_equal.govalue_pure.govalue_union.govalue_unsafe_go120.govalue_unsafe_go121.go
protoregistry
runtime
types
known
anypb
durationpb
fieldmaskpb
structpb
timestamppb
wrapperspb
gopkg.in
warnings.v0
yaml.v2
.travis.ymlLICENSELICENSE.libyamlNOTICEREADME.mdapic.godecode.goemitterc.goencode.goparserc.goreaderc.goresolve.goscannerc.gosorter.gowriterc.goyaml.goyamlh.goyamlprivateh.go
yaml.v3
gotest.tools
v3
781
vendor/github.com/prometheus/common/expfmt/text_parse.go
generated
vendored
Normal file
781
vendor/github.com/prometheus/common/expfmt/text_parse.go
generated
vendored
Normal file
@ -0,0 +1,781 @@
|
||||
// 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"
|
||||
"errors"
|
||||
"fmt"
|
||||
"io"
|
||||
"math"
|
||||
"strconv"
|
||||
"strings"
|
||||
|
||||
dto "github.com/prometheus/client_model/go"
|
||||
|
||||
"google.golang.org/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 != nil && errors.Is(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 {
|
||||
// This is the only place that we expect to see io.EOF,
|
||||
// which is not an error but the signal that we are done.
|
||||
// Any other error that happens to align with the start of
|
||||
// a line is still an error.
|
||||
if errors.Is(p.err, io.EOF) {
|
||||
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
|
||||
}
|
||||
// Check for duplicate label names.
|
||||
labels := make(map[string]struct{})
|
||||
for _, l := range p.currentMetric.Label {
|
||||
lName := l.GetName()
|
||||
if _, exists := labels[lName]; !exists {
|
||||
labels[lName] = struct{}{}
|
||||
} else {
|
||||
p.parseError(fmt.Sprintf("duplicate label names for metric %q", p.currentMF.GetName()))
|
||||
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
|
||||
}
|
||||
if !model.LabelValue(p.currentToken.String()).IsValid() {
|
||||
p.parseError(fmt.Sprintf("invalid label value %q", p.currentToken.String()))
|
||||
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 = parseFloat(p.currentLabelPair.GetValue()); 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 = parseFloat(p.currentLabelPair.GetValue()); 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.GetValue()))
|
||||
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 := parseFloat(p.currentToken.String())
|
||||
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: '\\' translates 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
|
||||
}
|
||||
}
|
||||
|
||||
func parseFloat(s string) (float64, error) {
|
||||
if strings.ContainsAny(s, "pP_") {
|
||||
return 0, fmt.Errorf("unsupported character in float")
|
||||
}
|
||||
return strconv.ParseFloat(s, 64)
|
||||
}
|
Reference in New Issue
Block a user