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connection_string.go
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connection_string.go
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package go_ora
import (
"errors"
"fmt"
"github.com/sijms/go-ora/advanced_nego"
"github.com/sijms/go-ora/network"
"github.com/sijms/go-ora/trace"
"net"
"net/url"
"os"
"os/user"
"path"
"runtime"
"strconv"
"strings"
"time"
)
type PromotableTransaction int
//const (
// Promotable PromotableTransaction = 1
// Local PromotableTransaction = 0
//)
type DBAPrivilege int
const (
NONE DBAPrivilege = 0
SYSDBA DBAPrivilege = 0x20
SYSOPER DBAPrivilege = 0x40
)
type AuthType int
const (
Normal AuthType = 0
OS AuthType = 1
)
const defaultPort int = 1521
func DBAPrivilegeFromString(s string) DBAPrivilege {
S := strings.ToUpper(s)
if S == "SYSDBA" {
return SYSDBA
} else if S == "SYSOPER" {
return SYSOPER
} else {
return NONE
}
}
//type EnList int
//const (
// FALSE EnList = 0
// TRUE EnList = 1
// DYNAMIC EnList = 2
//)
//func EnListFromString(s string) EnList {
// S := strings.ToUpper(s)
// if S == "TRUE" {
// return TRUE
// } else if S == "DYNAMIC" {
// return DYNAMIC
// } else {
// return FALSE
// }
//}
type ConnectionString struct {
connOption network.ConnectionOption
DataSource string
Host string
Port int
DBAPrivilege DBAPrivilege
password string
Trace string // Trace file
WalletPath string
w *wallet
authType AuthType
//EnList EnList
//ConnectionLifeTime int
//IncrPoolSize int
//DecrPoolSize int
//MaxPoolSize int
//MinPoolSize int
//PasswordSecurityInfo bool
//Pooling bool
//PromotableTransaction PromotableTransaction
//ProxyUserID string
//ProxyPassword string
//ValidateConnection bool
//StmtCacheSize int
//StmtCachePurge bool
//HaEvent bool
//LoadBalance bool
//MetadataBooling bool
//ContextConnection bool
//SelfTuning bool
//ApplicationEdition string
//PoolRegulator int
//ConnectionPoolTimeout int
}
// BuildJDBC create url from user, password and JDBC description string
func BuildJDBC(user, password, connStr string, options map[string]string) string {
if options == nil {
options = make(map[string]string)
}
options["connStr"] = connStr
return BuildUrl("", 0, "", user, password, options)
}
// BuildUrl create databaseURL from server, port, service, user, password, urlOptions
// this function help build a will formed databaseURL and accept any character as it
// convert special charters to corresponding values in URL
func BuildUrl(server string, port int, service, user, password string, options map[string]string) string {
ret := fmt.Sprintf("oracle://%s:%s@%s/%s", url.PathEscape(user), url.PathEscape(password),
net.JoinHostPort(server, strconv.Itoa(port)), url.PathEscape(service))
if options != nil {
ret += "?"
for key, val := range options {
val = strings.TrimSpace(val)
for _, temp := range strings.Split(val, ",") {
temp = strings.TrimSpace(temp)
if strings.ToUpper(key) == "SERVER" {
ret += fmt.Sprintf("%s=%s&", key, temp)
} else {
ret += fmt.Sprintf("%s=%s&", key, url.QueryEscape(temp))
}
}
}
ret = strings.TrimRight(ret, "&")
}
return ret
}
// newConnectionStringFromUrl create new connection string from databaseURL data and options
func newConnectionStringFromUrl(databaseUrl string) (*ConnectionString, error) {
u, err := url.Parse(databaseUrl)
if err != nil {
return nil, err
}
q := u.Query()
//p := u.Port()
ret := &ConnectionString{
connOption: network.ConnectionOption{
PrefetchRows: 25,
SessionInfo: network.SessionInfo{
Timeout: time.Duration(15),
//TransportDataUnitSize: 0xFFFF,
//SessionDataUnitSize: 0xFFFF,
TransportDataUnitSize: 0x200000,
SessionDataUnitSize: 0x200000,
Protocol: "tcp",
SSL: false,
SSLVerify: true,
},
DatabaseInfo: network.DatabaseInfo{
Servers: make([]network.ServerAddr, 0, 3),
},
},
Port: defaultPort,
DBAPrivilege: NONE,
//EnList: TRUE,
//IncrPoolSize: 5,
//DecrPoolSize: 5,
//MaxPoolSize: 100,
//MinPoolSize: 1,
//PromotableTransaction: Promotable,
//StmtCacheSize: 20,
//MetadataBooling: true,
//SelfTuning: true,
//PoolRegulator: 100,
//ConnectionPoolTimeout: 15,
}
ret.connOption.UserID = u.User.Username()
ret.password, _ = u.User.Password()
if strings.ToUpper(ret.connOption.UserID) == "SYS" {
ret.DBAPrivilege = SYSDBA
}
host, p, err := net.SplitHostPort(u.Host)
if err != nil {
return nil, err
}
if len(host) > 0 {
tempAddr := network.ServerAddr{Addr: host, Port: defaultPort}
tempAddr.Port, err = strconv.Atoi(p)
if err != nil {
tempAddr.Port = defaultPort
}
ret.connOption.Servers = append(ret.connOption.Servers, tempAddr)
}
ret.connOption.ServiceName = strings.Trim(u.Path, "/")
for key, val := range q {
switch strings.ToUpper(key) {
case "CONNSTR":
err = ret.connOption.UpdateDatabaseInfo(q.Get("connStr"))
if err != nil {
return nil, err
}
case "SERVER":
for _, srv := range val {
srv = strings.TrimSpace(srv)
if srv != "" {
host, p, err := net.SplitHostPort(srv)
if err != nil {
return nil, err
}
tempAddr := network.ServerAddr{Addr: host, Port: defaultPort}
if p != "" {
tempAddr.Port, err = strconv.Atoi(p)
if err != nil {
tempAddr.Port = defaultPort
}
}
ret.connOption.Servers = append(ret.connOption.Servers, tempAddr)
}
}
case "SERVICE NAME":
ret.connOption.ServiceName = val[0]
case "SID":
ret.connOption.SID = val[0]
case "INSTANCE NAME":
ret.connOption.InstanceName = val[0]
case "WALLET":
ret.WalletPath = val[0]
case "AUTH TYPE":
if strings.ToUpper(val[0]) == "OS" {
ret.authType = OS
} else {
ret.authType = Normal
}
case "OS USER":
ret.connOption.ClientInfo.UserName = val[0]
case "OS PASS":
fallthrough
case "OS PASSWORD":
ret.connOption.ClientInfo.Password = val[0]
case "OS HASH":
fallthrough
case "OS PASSHASH":
case "OS PASSWORD HASH":
ret.connOption.ClientInfo.Password = val[0]
SetNTSAuth(&advanced_nego.NTSAuthHash{})
case "DOMAIN":
ret.connOption.DomainName = val[0]
case "AUTH SERV":
for _, tempVal := range val {
ret.connOption.AuthService, _ = uniqueAppendString(ret.connOption.AuthService, strings.ToUpper(strings.TrimSpace(tempVal)), false)
}
case "SSL":
ret.connOption.SSL = strings.ToUpper(val[0]) == "TRUE" || strings.ToUpper(val[0]) == "ENABLE"
case "SSL VERIFY":
ret.connOption.SSLVerify = strings.ToUpper(val[0]) == "TRUE" || strings.ToUpper(val[0]) == "ENABLE"
case "DBA PRIVILEGE":
ret.DBAPrivilege = DBAPrivilegeFromString(val[0])
case "CONNECT TIMEOUT":
fallthrough
case "CONNECTION TIMEOUT":
to, err := strconv.Atoi(val[0])
if err != nil {
return nil, errors.New("CONNECTION TIMEOUT value must be an integer")
}
ret.connOption.SessionInfo.Timeout = time.Duration(to)
case "TRACE FILE":
ret.Trace = val[0]
case "PREFETCH_ROWS":
ret.connOption.PrefetchRows, err = strconv.Atoi(val[0])
if err != nil {
ret.connOption.PrefetchRows = 25
}
case "UNIX SOCKET":
ret.connOption.SessionInfo.UnixAddress = val[0]
case "PROXY CLIENT NAME":
ret.connOption.DatabaseInfo.ProxyClientName = val[0]
//case "ENLIST":
// ret.EnList = EnListFromString(val[0])
//case "INC POOL SIZE":
// ret.IncrPoolSize, err = strconv.Atoi(val[0])
// if err != nil {
// return nil, errors.New("INC POOL SIZE value must be an integer")
// }
//case "DECR POOL SIZE":
// ret.DecrPoolSize, err = strconv.Atoi(val[0])
// if err != nil {
// return nil, errors.New("DECR POOL SIZE value must be an integer")
// }
//case "MAX POOL SIZE":
// ret.MaxPoolSize, err = strconv.Atoi(val[0])
// if err != nil {
// return nil, errors.New("MAX POOL SIZE value must be an integer")
// }
//case "MIN POOL SIZE":
// ret.MinPoolSize, err = strconv.Atoi(val[0])
// if err != nil {
// return nil, errors.New("MIN POOL SIZE value must be an integer")
// }
//case "POOL REGULATOR":
// ret.PoolRegulator, err = strconv.Atoi(val[0])
// if err != nil {
// return nil, errors.New("POOL REGULATOR value must be an integer")
// }
//case "STATEMENT CACHE SIZE":
// ret.StmtCacheSize, err = strconv.Atoi(val[0])
// if err != nil {
// return nil, errors.New("STATEMENT CACHE SIZE value must be an integer")
// }
//case "CONNECTION POOL TIMEOUT":
// ret.ConnectionPoolTimeout, err = strconv.Atoi(val[0])
// if err != nil {
// return nil, errors.New("CONNECTION POOL TIMEOUT value must be an integer")
// }
//case "CONNECTION LIFETIME":
// ret.ConnectionLifeTime, err = strconv.Atoi(val[0])
// if err != nil {
// return nil, errors.New("CONNECTION LIFETIME value must be an integer")
// }
//case "PERSIST SECURITY INFO":
// ret.PasswordSecurityInfo = val[0] == "TRUE"
//case "POOLING":
// ret.Pooling = val[0] == "TRUE"
//case "VALIDATE CONNECTION":
// ret.ValidateConnection = val[0] == "TRUE"
//case "STATEMENT CACHE PURGE":
// ret.StmtCachePurge = val[0] == "TRUE"
//case "HA EVENTS":
// ret.HaEvent = val[0] == "TRUE"
//case "LOAD BALANCING":
// ret.LoadBalance = val[0] == "TRUE"
//case "METADATA POOLING":
// ret.MetadataBooling = val[0] == "TRUE"
//case "SELF TUNING":
// ret.SelfTuning = val[0] == "TRUE"
//case "CONTEXT CONNECTION":
// ret.ContextConnection = val[0] == "TRUE"
//case "PROMOTABLE TRANSACTION":
// if val[0] == "PROMOTABLE" {
// ret.PromotableTransaction = Promotable
// } else {
// ret.PromotableTransaction = Local
// }
//case "APPLICATION EDITION":
// ret.ApplicationEdition = val[0]
//case "PROXY USER ID":
// ret.ProxyUserID = val[0]
//case "PROXY PASSWORD":
// ret.ProxyPassword = val[0]
}
}
if len(ret.connOption.Servers) == 0 {
return nil, errors.New("empty connection servers")
}
if len(ret.WalletPath) > 0 && len(ret.connOption.UserID) > 0 {
if len(ret.connOption.ServiceName) == 0 {
return nil, errors.New("you should specify server/service if you will use wallet")
}
ret.w, err = NewWallet(path.Join(ret.WalletPath, "cwallet.sso"))
if err != nil {
return nil, err
}
if len(ret.password) == 0 {
serv := ret.connOption.Servers[0]
cred, err := ret.w.getCredential(serv.Addr, serv.Port, ret.connOption.ServiceName, ret.connOption.UserID)
if err != nil {
return nil, err
}
if cred == nil {
return nil, errors.New(
fmt.Sprintf("cannot find credentials for server: %s, service: %s, username: %s",
serv, ret.connOption.ServiceName, ret.connOption.UserID))
}
ret.connOption.UserID = cred.username
ret.password = cred.password
}
}
return ret, ret.validate()
}
// validate check is data in connection string is correct and fulfilled
func (connStr *ConnectionString) validate() error {
//if !connStr.Pooling {
// connStr.MaxPoolSize = -1
// connStr.MinPoolSize = 0
// connStr.IncrPoolSize = -1
// connStr.DecrPoolSize = 0
// connStr.PoolRegulator = 0
//}
//if len(connStr.UserID) == 0 {
// return errors.New("empty user name")
//}
//if len(connStr.Password) == 0 {
// return errors.New("empty password")
//}
if len(connStr.connOption.SID) == 0 && len(connStr.connOption.ServiceName) == 0 {
return errors.New("empty SID and service name")
}
if len(connStr.connOption.UserID) == 0 || len(connStr.password) == 0 {
connStr.authType = OS
}
if connStr.authType == OS {
if runtime.GOOS == "windows" {
connStr.connOption.AuthService = append(connStr.connOption.AuthService, "NTS")
}
}
if connStr.connOption.SSL {
connStr.connOption.Protocol = "tcps"
}
if len(connStr.Trace) > 0 {
tf, err := os.Create(connStr.Trace)
if err != nil {
//noinspection GoErrorStringFormat
return fmt.Errorf("Can't open trace file: %w", err)
}
connStr.connOption.Tracer = trace.NewTraceWriter(tf)
} else {
connStr.connOption.Tracer = trace.NilTracer()
}
// get client info
var idx int
var temp *user.User
if userName := os.Getenv("USER"); len(userName) > 0 {
temp = &user.User{
Uid: "",
Gid: "",
Username: userName,
Name: userName,
HomeDir: "",
}
} else {
temp, _ = user.Current()
}
if temp != nil {
idx = strings.Index(temp.Username, "\\")
if idx >= 0 {
if len(connStr.connOption.DomainName) == 0 {
connStr.connOption.DomainName = temp.Username[:idx]
}
if len(connStr.connOption.ClientInfo.UserName) == 0 {
connStr.connOption.ClientInfo.UserName = temp.Username[idx+1:]
}
} else {
if len(connStr.connOption.ClientInfo.UserName) == 0 {
connStr.connOption.ClientInfo.UserName = temp.Username
}
}
}
connStr.connOption.HostName, _ = os.Hostname()
idx = strings.LastIndex(os.Args[0], "/")
idx++
if idx < 0 {
idx = 0
}
connStr.connOption.ProgramPath = os.Args[0]
connStr.connOption.ProgramName = os.Args[0][idx:]
connStr.connOption.DriverName = "OracleClientGo"
connStr.connOption.PID = os.Getpid()
return nil
}
func uniqueAppendString(list []string, newItem string, ignoreCase bool) ([]string, bool) {
found := false
for _, temp := range list {
if ignoreCase {
if strings.ToUpper(temp) == strings.ToUpper(newItem) {
found = true
break
}
} else {
if temp == newItem {
found = true
break
}
}
}
if !found {
list = append(list, newItem)
}
return list, !found
}