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
6 // http://www.apache.org/licenses/LICENSE-2.0
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.
14 // Package expfmt contains tools for reading and writing Prometheus metrics.
17 // Format specifies the HTTP content type of the different wire protocols.
20 // Constants to assemble the Content-Type values for the different wire protocols.
23 ProtoType = `application/vnd.google.protobuf`
24 ProtoProtocol = `io.prometheus.client.MetricFamily`
25 ProtoFmt = ProtoType + "; proto=" + ProtoProtocol + ";"
27 // The Content-Type values for the different wire protocols.
28 FmtUnknown Format = `<unknown>`
29 FmtText Format = `text/plain; version=` + TextVersion + `; charset=utf-8`
30 FmtProtoDelim Format = ProtoFmt + ` encoding=delimited`
31 FmtProtoText Format = ProtoFmt + ` encoding=text`
32 FmtProtoCompact Format = ProtoFmt + ` encoding=compact-text`
36 hdrContentType = "Content-Type"