tidb util 源码
tidb util 代码
文件路径：/telemetry/util.go
// Copyright 2020 PingCAP, Inc.
//
// 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.
package telemetry
import (
"crypto/sha1" // #nosec G505
"fmt"
"sort"
"strconv"
"strings"
)
// hashString returns the SHA1 checksum in hex of the string.
func hashString(text string) (string, error) {
hash := sha1.New() // #nosec G401
_, err := hash.Write([]byte(text))
if err != nil {
return "", err
}
hashed := hash.Sum(nil)
return fmt.Sprintf("%x", hashed), nil
}
// parseAddressAndHash parses an address in HOST:PORT format, returns the hashed host and the port.
func parseAddressAndHash(address string) (result string, portName string, err error) {
var host, port string
if !strings.Contains(address, ":") {
host = address
port = ""
} else {
parts := strings.Split(address, ":")
lastPart := parts[len(parts)-1]
if _, err := strconv.Atoi(lastPart); err != nil {
// Ensure that all plaintext part (i.e. port) will never contain sensitive data.
// The port part is not int, recognize all as host.
host = address
port = ""
} else {
host = strings.Join(parts[:len(parts)-1], ":")
port = lastPart
}
}
res, err := hashString(host)
if err != nil {
return "", "", err
}
return res, port, err
}
// See https://stackoverflow.com/a/58026884
func sortedStringContains(s []string, searchTerm string) bool {
i := sort.SearchStrings(s, searchTerm)
return i < len(s) && s[i] == searchTerm
}
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