source: code/trunk/vendor/github.com/prometheus/common/expfmt/expfmt.go@ 822

// 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 + ";"
        OpenMetricsType    = `application/openmetrics-text`
        OpenMetricsVersion = "0.0.1"

        // The Content-Type values for the different wire protocols.
        FmtUnknown      Format = `<unknown>`
        FmtText         Format = `text/plain; version=` + TextVersion + `; charset=utf-8`
        FmtProtoDelim   Format = ProtoFmt + ` encoding=delimited`
        FmtProtoText    Format = ProtoFmt + ` encoding=text`
        FmtProtoCompact Format = ProtoFmt + ` encoding=compact-text`
        FmtOpenMetrics  Format = OpenMetricsType + `; version=` + OpenMetricsVersion + `; charset=utf-8`
)

const (
        hdrContentType = "Content-Type"
        hdrAccept      = "Accept"
)