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. 15package expfmt 16 17// Format specifies the HTTP content type of the different wire protocols. 18type Format string 19 20// Constants to assemble the Content-Type values for the different wire protocols. 21const ( 22 TextVersion = "0.0.4" 23 ProtoType = `application/vnd.google.protobuf` 24 ProtoProtocol = `io.prometheus.client.MetricFamily` 25 ProtoFmt = ProtoType + "; proto=" + ProtoProtocol + ";" 26 27 // The Content-Type values for the different wire protocols. 28 FmtUnknown Format = `<unknown>` 29 FmtText Format = `text/plain; version=` + TextVersion 30 FmtProtoDelim Format = ProtoFmt + ` encoding=delimited` 31 FmtProtoText Format = ProtoFmt + ` encoding=text` 32 FmtProtoCompact Format = ProtoFmt + ` encoding=compact-text` 33) 34 35const ( 36 hdrContentType = "Content-Type" 37 hdrAccept = "Accept" 38) 39