all repos — captcha @ 9de0d066b9199eb378005dfef151c0dcfb81da7f

Go package captcha implements generation and verification of image and audio CAPTCHAs.

Add ErrNotFound, return it from WriteAudio/Image.
Dmitry Chestnykh dmitry@codingrobots.com
Sun, 24 Apr 2011 14:34:11 +0200
commit

9de0d066b9199eb378005dfef151c0dcfb81da7f

parent

68d217e79dfab952ad179041ac11e1efaf071d3a

1 files changed, 4 insertions(+), 2 deletions(-)

jump to
M captcha.go → captcha.go 
@@ -11,6 +11,8 @@
 // Standard number of digits in captcha.
 const StdLength = 6
 
+var ErrNotFound = os.NewError("captcha with the given id not found")
+
 var globalStore = newStore()
 
 // RandomDigits returns a byte slice of the given length containing random

@@ -54,7 +56,7 @@ // given id. The image will have the given width and height.
 func WriteImage(w io.Writer, id string, width, height int) os.Error {
 	d := globalStore.getDigits(id)
 	if d == nil {
-		return os.NewError("captcha id not found")
+		return ErrNotFound
 	}
 	_, err := NewImage(d, width, height).WriteTo(w)
 	return err

@@ -65,7 +67,7 @@ // given id.
 func WriteAudio(w io.Writer, id string) os.Error {
 	d := globalStore.getDigits(id)
 	if d == nil {
-		return os.NewError("captcha id not found")
+		return ErrNotFound
 	}
 	_, err := NewAudio(d).WriteTo(w)
 	return err