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utils.go
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/
utils.go
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package drivers
import (
"context"
"fmt"
"hash/crc32"
"regexp"
"strings"
"time"
)
func ExtractCustomParams(conn string, params []string) (map[string]string, error) {
result := make(map[string]string)
for _, param := range params {
reg := regexp.MustCompile(fmt.Sprintf("%s=(\\w+)", param))
match := reg.FindStringSubmatch(conn)
if len(match) > 1 {
result[param] = match[1]
}
}
return result, nil
}
func RemoveParamsFromURL(conn string, params []string) (string, error) {
prefixCorrection := regexp.MustCompile(`\?&+`)
repeatedAmber := regexp.MustCompile("&+")
for _, param := range params {
reg := regexp.MustCompile(fmt.Sprintf("%s=\\w+", param))
conn = string(reg.ReplaceAll([]byte(conn), []byte(``)))
}
parts := strings.Split(conn, "/")
urlParams := parts[len(parts)-1]
urlParams = string(prefixCorrection.ReplaceAll([]byte(urlParams), []byte(`?`)))
urlParams = string(repeatedAmber.ReplaceAll([]byte(urlParams), []byte(`&`)))
parts[len(parts)-1] = urlParams
return strings.Join(parts, "/"), nil
}
const advisoryLockIDSalt uint = 1486364155
func GenerateAdvisoryLockID(databaseName, schemaName string) (string, error) {
databaseName = schemaName + databaseName + "\x00"
sum := crc32.ChecksumIEEE([]byte(databaseName))
sum = sum * uint32(advisoryLockIDSalt)
return fmt.Sprint(sum), nil
}
func GetContext(timeoutInSeconds int) (context.Context, context.CancelFunc) {
if t := timeoutInSeconds; t > 0 {
return context.WithTimeout(context.Background(), time.Second*time.Duration(t))
}
return context.WithCancel(context.Background())
}