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Escape terminal special characters in kubectl (#112553)
* Escape terminal special characters in kubectl * Add escaping for kubectl alpha events Kubernetes-commit: dad0e937c0f76344363eb691b2668490ffef8537
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| Original file line number | Diff line number | Diff line change |
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| /* | ||
| Copyright 2022 The Kubernetes 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. | ||
| */ | ||
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| package printers | ||
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| import ( | ||
| "io" | ||
| "strings" | ||
| ) | ||
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| // terminalEscaper replaces ANSI escape sequences and other terminal special | ||
| // characters to avoid terminal escape character attacks (issue #101695). | ||
| var terminalEscaper = strings.NewReplacer("\x1b", "^[", "\r", "\\r") | ||
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| // WriteEscaped replaces unsafe terminal characters with replacement strings | ||
| // and writes them to the given writer. | ||
| func WriteEscaped(writer io.Writer, output string) error { | ||
| _, err := terminalEscaper.WriteString(writer, output) | ||
| return err | ||
| } | ||
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| // EscapeTerminal escapes terminal special characters in a human readable (but | ||
| // non-reversible) format. | ||
| func EscapeTerminal(in string) string { | ||
| return terminalEscaper.Replace(in) | ||
| } |