gitee.com/ks-custle/core-gm@v0.0.0-20230922171213-b83bdd97b62c/prometheus/common/expfmt/expfmt.go (about)

     1  // Copyright 2015 The Prometheus Authors
     2  // Licensed under the Apache License, Version 2.0 (the "License");
     3  // you may not use this file except in compliance with the License.
     4  // You may obtain a copy of the License at
     5  //
     6  // http://www.apache.org/licenses/LICENSE-2.0
     7  //
     8  // Unless required by applicable law or agreed to in writing, software
     9  // distributed under the License is distributed on an "AS IS" BASIS,
    10  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    11  // See the License for the specific language governing permissions and
    12  // limitations under the License.
    13  
    14  // Package expfmt contains tools for reading and writing Prometheus metrics.
    15  package expfmt
    16  
    17  // Format specifies the HTTP content type of the different wire protocols.
    18  type Format string
    19  
    20  // Constants to assemble the Content-Type values for the different wire protocols.
    21  const (
    22  	TextVersion        = "0.0.4"
    23  	ProtoType          = `application/vnd.google.protobuf`
    24  	ProtoProtocol      = `io.prometheus.client.MetricFamily`
    25  	ProtoFmt           = ProtoType + "; proto=" + ProtoProtocol + ";"
    26  	OpenMetricsType    = `application/openmetrics-text`
    27  	OpenMetricsVersion = "0.0.1"
    28  
    29  	// The Content-Type values for the different wire protocols.
    30  	FmtUnknown      Format = `<unknown>`
    31  	FmtText         Format = `text/plain; version=` + TextVersion + `; charset=utf-8`
    32  	FmtProtoDelim   Format = ProtoFmt + ` encoding=delimited`
    33  	FmtProtoText    Format = ProtoFmt + ` encoding=text`
    34  	FmtProtoCompact Format = ProtoFmt + ` encoding=compact-text`
    35  	FmtOpenMetrics  Format = OpenMetricsType + `; version=` + OpenMetricsVersion + `; charset=utf-8`
    36  )
    37  
    38  const (
    39  	hdrContentType = "Content-Type"
    40  	hdrAccept      = "Accept"
    41  )