40 lines
1.2 KiB
Go
40 lines
1.2 KiB
Go
/*
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Copyright 2022 The Kubernetes Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package printers
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import (
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"io"
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"strings"
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)
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// terminalEscaper replaces ANSI escape sequences and other terminal special
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// characters to avoid terminal escape character attacks (issue #101695).
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var terminalEscaper = strings.NewReplacer("\x1b", "^[", "\r", "\\r")
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// WriteEscaped replaces unsafe terminal characters with replacement strings
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// and writes them to the given writer.
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func WriteEscaped(writer io.Writer, output string) error {
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_, err := terminalEscaper.WriteString(writer, output)
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return err
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}
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// EscapeTerminal escapes terminal special characters in a human readable (but
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// non-reversible) format.
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func EscapeTerminal(in string) string {
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return terminalEscaper.Replace(in)
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}
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