mirror of
https://github.com/open-telemetry/opentelemetry-go.git
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3be9813d56
* Rename exporters/metric/prometheus * Rename exporters/trace/jaeger * Rename exporters/trace/zipkin * Fix dependabot config and make test * Update README docs * Deprecate exporters instead of remove them * Update dependabot with old modules * Run crosslink * Add lint override for known deprecated pkg * Update PR number
51 lines
1.6 KiB
Go
51 lines
1.6 KiB
Go
// Copyright The OpenTelemetry Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package prometheus // import "go.opentelemetry.io/otel/exporters/prometheus"
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import (
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"strings"
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"unicode"
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)
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// TODO(paivagustavo): we should provide a more uniform and controlled way of sanitizing.
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// Letting users define wether we should try or not to sanitize metric names.
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// This is a copy of sdk/internal/sanitize.go
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// sanitize returns a string that is truncated to 100 characters if it's too
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// long, and replaces non-alphanumeric characters to underscores.
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func sanitize(s string) string {
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if len(s) == 0 {
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return s
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}
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// TODO(paivagustavo): change this to use a bytes buffer to avoid a large number of string allocations.
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s = strings.Map(sanitizeRune, s)
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if unicode.IsDigit(rune(s[0])) {
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s = "key_" + s
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}
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if s[0] == '_' {
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s = "key" + s
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}
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return s
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}
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// converts anything that is not a letter or digit to an underscore
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func sanitizeRune(r rune) rune {
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if unicode.IsLetter(r) || unicode.IsDigit(r) {
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return r
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}
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// Everything else turns into an underscore
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return '_'
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}
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