3b63270909
Signed-off-by: Breezewish <me@breeswish.org> Co-authored-by: crazycs <crazycs520@gmail.com> Co-authored-by: Lynn <zimu_xia@126.com> Co-authored-by: ti-srebot <66930949+ti-srebot@users.noreply.github.com>
60 lines
1.6 KiB
Go
60 lines
1.6 KiB
Go
// Copyright 2020 PingCAP, Inc.
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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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// See the License for the specific language governing permissions and
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// limitations under the License.
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package telemetry
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import (
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"crypto/sha1"
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"fmt"
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"sort"
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"strconv"
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"strings"
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)
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// hashString returns the SHA1 checksum in hex of the string.
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func hashString(text string) string {
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hash := sha1.New()
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hash.Write([]byte(text))
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hashed := hash.Sum(nil)
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return fmt.Sprintf("%x", hashed)
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}
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// parseAddressAndHash parses an address in HOST:PORT format, returns the hashed host and the port.
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func parseAddressAndHash(address string) (string, string) {
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var host, port string
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if !strings.Contains(address, ":") {
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host = address
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port = ""
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} else {
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parts := strings.Split(address, ":")
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lastPart := parts[len(parts)-1]
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if _, err := strconv.Atoi(lastPart); err != nil {
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// Ensure that all plaintext part (i.e. port) will never contain sensitive data.
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// The port part is not int, recognize all as host.
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host = address
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port = ""
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} else {
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host = strings.Join(parts[:len(parts)-1], ":")
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port = lastPart
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}
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}
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return hashString(host), port
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}
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// See https://stackoverflow.com/a/58026884
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func sortedStringContains(s []string, searchTerm string) bool {
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i := sort.SearchStrings(s, searchTerm)
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return i < len(s) && s[i] == searchTerm
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}
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