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Implement read-only mode via _readonly=true flag in Open() 

Signed-off-by: Vojtech Bocek <vojtech.bocek@avg.com>
This commit is contained in:
Vojtech Bocek 2015-11-09 12:27:09 +01:00
parent 5651a9d9d4
commit f9701636b0
1 changed files with 9 additions and 5 deletions
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14
sqlite3.go
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@ -597,6 +597,8 @@ func errorString(err Error) string {
// _txlock=XXX // _txlock=XXX
// Specify locking behavior for transactions. XXX can be "immediate", // Specify locking behavior for transactions. XXX can be "immediate",
// "deferred", "exclusive". // "deferred", "exclusive".
// _readonly=true
// Open database in read-only mode (SQLITE_OPEN_READONLY)
func (d *SQLiteDriver) Open(dsn string) (driver.Conn, error) { func (d *SQLiteDriver) Open(dsn string) (driver.Conn, error) {
if C.sqlite3_threadsafe() == 0 { if C.sqlite3_threadsafe() == 0 {
return nil, errors.New("sqlite library was not compiled for thread-safe operation") return nil, errors.New("sqlite library was not compiled for thread-safe operation")
@ -605,6 +607,7 @@ func (d *SQLiteDriver) Open(dsn string) (driver.Conn, error) {
var loc *time.Location var loc *time.Location
txlock := "BEGIN" txlock := "BEGIN"
busy_timeout := 5000 busy_timeout := 5000
openflags := C.int(C.SQLITE_OPEN_FULLMUTEX | C.SQLITE_OPEN_READWRITE | C.SQLITE_OPEN_CREATE)
pos := strings.IndexRune(dsn, '?') pos := strings.IndexRune(dsn, '?')
if pos >= 1 { if pos >= 1 {
params, err := url.ParseQuery(dsn[pos+1:]) params, err := url.ParseQuery(dsn[pos+1:])
@ -647,6 +650,11 @@ func (d *SQLiteDriver) Open(dsn string) (driver.Conn, error) {
} }
} }
// _readonly
if params.Get("_readonly") == "true" {
openflags = C.SQLITE_OPEN_READONLY | C.SQLITE_OPEN_FULLMUTEX
}
if !strings.HasPrefix(dsn, "file:") { if !strings.HasPrefix(dsn, "file:") {
dsn = dsn[:pos] dsn = dsn[:pos]
} }
@ -655,11 +663,7 @@ func (d *SQLiteDriver) Open(dsn string) (driver.Conn, error) {
var db *C.sqlite3 var db *C.sqlite3
name := C.CString(dsn) name := C.CString(dsn)
defer C.free(unsafe.Pointer(name)) defer C.free(unsafe.Pointer(name))
rv := C._sqlite3_open_v2(name, &db, rv := C._sqlite3_open_v2(name, &db, openflags, nil)
C.SQLITE_OPEN_FULLMUTEX|
C.SQLITE_OPEN_READWRITE|
C.SQLITE_OPEN_CREATE,
nil)
if rv != 0 { if rv != 0 {
return nil, Error{Code: ErrNo(rv)} return nil, Error{Code: ErrNo(rv)}
} }