mirror of
https://github.com/Syngnat/GoNavi.git
synced 2026-05-12 04:09:40 +08:00
71e5de0cdc
- 架构升级：从driver专属拨号器改为通用本地端口转发模式
- 并发安全：sync.Once保护Close操作,RWMutex保护状态访问,双向errc等待
- 连接池化：GetOrCreateLocalForwarder/GetOrCreateSSHClient实现缓存复用
- SQL安全：kingbase_impl.go引入esc函数,防止双引号注入(""ldf_server""问题)
- Schema动态化：三级fallback(schema.table解析→dbName参数→current_schema())
- 代码复用：scanRows统一行扫描逻辑,normalizeQueryValueWithDBType增强类型处理
Close #40
115 lines
2.2 KiB
Go
115 lines
2.2 KiB
Go
package db
|
||
|
||
import (
|
||
"encoding/hex"
|
||
"fmt"
|
||
"strings"
|
||
"unicode"
|
||
"unicode/utf8"
|
||
)
|
||
|
||
// normalizeQueryValue normalizes driver-returned values for UI/JSON transport.
|
||
// 当前主要处理 []byte：如果是可读文本则转为 string，否则转为十六进制字符串，避免前端出现“空白值”。
|
||
func normalizeQueryValue(v interface{}) interface{} {
|
||
return normalizeQueryValueWithDBType(v, "")
|
||
}
|
||
|
||
func normalizeQueryValueWithDBType(v interface{}, databaseTypeName string) interface{} {
|
||
if b, ok := v.([]byte); ok {
|
||
return bytesToDisplayValue(b, databaseTypeName)
|
||
}
|
||
return v
|
||
}
|
||
|
||
func bytesToDisplayValue(b []byte, databaseTypeName string) interface{} {
|
||
if b == nil {
|
||
return nil
|
||
}
|
||
if len(b) == 0 {
|
||
return ""
|
||
}
|
||
|
||
dbType := strings.ToUpper(strings.TrimSpace(databaseTypeName))
|
||
if isBitLikeDBType(dbType) {
|
||
if u, ok := bytesToUint64(b); ok {
|
||
// JS number precision is limited; keep large bitmasks as string.
|
||
const maxSafeInteger = 9007199254740991 // 2^53 - 1
|
||
if u <= maxSafeInteger {
|
||
return int64(u)
|
||
}
|
||
return fmt.Sprintf("%d", u)
|
||
}
|
||
}
|
||
|
||
if utf8.Valid(b) {
|
||
s := string(b)
|
||
if isMostlyPrintable(s) {
|
||
return s
|
||
}
|
||
}
|
||
|
||
// Fallback: some drivers return BIT(1) as []byte{0} / []byte{1} without type info.
|
||
if dbType == "" && len(b) == 1 && (b[0] == 0 || b[0] == 1) {
|
||
return int64(b[0])
|
||
}
|
||
|
||
return bytesToReadableString(b)
|
||
}
|
||
|
||
func bytesToReadableString(b []byte) interface{} {
|
||
if b == nil {
|
||
return nil
|
||
}
|
||
if len(b) == 0 {
|
||
return ""
|
||
}
|
||
return "0x" + hex.EncodeToString(b)
|
||
}
|
||
|
||
func isBitLikeDBType(typeName string) bool {
|
||
if typeName == "" {
|
||
return false
|
||
}
|
||
switch typeName {
|
||
case "BIT", "VARBIT":
|
||
return true
|
||
default:
|
||
}
|
||
return strings.HasPrefix(typeName, "BIT")
|
||
}
|
||
|
||
func bytesToUint64(b []byte) (uint64, bool) {
|
||
if len(b) == 0 || len(b) > 8 {
|
||
return 0, false
|
||
}
|
||
var u uint64
|
||
for _, v := range b {
|
||
u = (u << 8) | uint64(v)
|
||
}
|
||
return u, true
|
||
}
|
||
|
||
func isMostlyPrintable(s string) bool {
|
||
if s == "" {
|
||
return true
|
||
}
|
||
|
||
total := 0
|
||
printable := 0
|
||
for _, r := range s {
|
||
total++
|
||
switch r {
|
||
case '\n', '\r', '\t':
|
||
printable++
|
||
continue
|
||
default:
|
||
}
|
||
if unicode.IsPrint(r) {
|
||
printable++
|
||
}
|
||
}
|
||
|
||
// 允许少量不可见字符，避免把正常文本误判为二进制。
|
||
return printable*100 >= total*90
|
||
}
|