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justcaptcha
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ICaptchaDB interface renamed to CaptchaDB. And implementation was renamed to InMemoryCaptchaDB. Composition of sync.Mutex was moved to the top of struct. Methods was rearranged to resemble order from CaptchaDB interface.

This commit is contained in:
Alexander Andreev 2022-07-30 15:39:19 +04:00
parent c14f9b0149
commit 925d48c10d
Signed by: Arav
GPG Key ID: 0388CC8FAA51063F
1 changed files with 28 additions and 27 deletions
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55
pkg/captcha/db.go
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@ -25,8 +25,8 @@ func NewID(additionalData string, answer Answer) ID {
return ID(base64.RawURLEncoding.EncodeToString(idHash.Sum(nil)))
}
type ICaptchaDB interface {
New(data string) (ICaptcha, ID)
type CaptchaDB interface {
New(data string) (Captcha, ID)
SetExpiry(expiry time.Duration)
GetExpiry() time.Duration
Image(id ID) (*image.Image, error)
@ -34,15 +34,29 @@ type ICaptchaDB interface {
IsSolved(id ID) bool
}
type CaptchaDB struct {
DB map[ID]ICaptcha
ExpireIn time.Duration
type InMemoryCaptchaDB struct {
sync.Mutex
DB map[ID]Captcha
ExpireIn time.Duration
}
// New accepts an Captcha instance, generates an ID and store it in a database.
// `data` string is an additional random data used to generate an ID,
// e.g. IP-address.
func (cdb *InMemoryCaptchaDB) New(data string, captcha Captcha) (Captcha, ID) {
id := NewID(data, captcha.GetAnswer())
cdb.Lock()
cdb.DB[id] = captcha
cdb.Unlock()
return captcha, id
}
// SetExpiry stores expire value and starts a goroutine
// that checks for expired CAPTCHAs every minute.
func (cdb *CaptchaDB) SetExpiry(expire time.Duration) {
// that checks for expired CAPTCHAs.
func (cdb *InMemoryCaptchaDB) SetExpiry(expire time.Duration) {
cdb.ExpireIn = expire
if expire < expiredScanInterval {
expiredScanInterval = expire
@ -64,32 +78,24 @@ func (cdb *CaptchaDB) SetExpiry(expire time.Duration) {
}()
}
// New accepts an ICaptcha instance, generates an ID and store it in a database.
// `data` string is an additional random data used to generate an ID,
// e.g. IP-address.
func (cdb *CaptchaDB) New(data string, captcha ICaptcha) (ICaptcha, ID) {
id := NewID(data, captcha.GetAnswer())
cdb.Lock()
cdb.DB[id] = captcha
cdb.Unlock()
return captcha, id
// GetExpiry returns time for how long captcha will last.
func (cdb *InMemoryCaptchaDB) GetExpiry() time.Duration {
return cdb.ExpireIn
}
// Image returns image for a captcha.
func (cdb *CaptchaDB) Image(id ID, style string) (*image.Image, error) {
func (cdb *InMemoryCaptchaDB) Image(id ID, style string) (image.Image, error) {
cdb.Lock()
defer cdb.Unlock()
if c, ok := cdb.DB[id]; ok {
return c.GetImage(style), nil
return c.Image(style), nil
}
return nil, errorNotFound
}
// Solve compares given answer with a stored one and if failed
// deletes a captcha from database.
func (cdb *CaptchaDB) Solve(id ID, answer Answer) (bool, error) {
func (cdb *InMemoryCaptchaDB) Solve(id ID, answer Answer) (bool, error) {
cdb.Lock()
defer cdb.Unlock()
if c, ok := cdb.DB[id]; ok {
@ -104,7 +110,7 @@ func (cdb *CaptchaDB) Solve(id ID, answer Answer) (bool, error) {
// IsSolved checks if captcha was solved and removes it
// from a database.
func (cdb *CaptchaDB) IsSolved(id ID) (bool, error) {
func (cdb *InMemoryCaptchaDB) IsSolved(id ID) (bool, error) {
cdb.Lock()
defer cdb.Unlock()
if c, ok := cdb.DB[id]; ok {
@ -114,8 +120,3 @@ func (cdb *CaptchaDB) IsSolved(id ID) (bool, error) {
}
return false, errorNotFound
}
// GetExpiry returns time for how long captcha will last.
func (cdb *CaptchaDB) GetExpiry() time.Duration {
return cdb.ExpireIn
}