func (self *Image) Resize(size string) {
var err error
url := to.String(self.Params.Get("url"))
relPath := ImageRoot + tango.PS + size + tango.PS + checksum.String(fmt.Sprintf("%s/%s", size, url), crypto.SHA1) + ".png"
fullPath := Root + tango.PS + relPath
_, err = os.Stat(fullPath)
if err == nil {
app.Server.Context.Redirect("/" + relPath)
app.Server.Context.HttpError(200)
return
} else {
filePath, err := resource.Download(url)
if err == nil {
thumb := canvas.New()
opened := thumb.Open(filePath)
if opened == true {
resize := strings.Split(size, "x")
width, _ := strconv.Atoi(resize[0])
height, _ := strconv.Atoi(resize[1])
thumb.AutoOrientate()
thumb.Thumbnail(uint(width), uint(height))
os.MkdirAll(path.Dir(fullPath), os.ModeDir|0755)
written := thumb.Write(fullPath)
if written {
app.Server.Context.Redirect("/" + relPath)
} else {
app.Server.Context.HttpError(500)
}
return
}
}
}
app.Server.Context.HttpError(404)
}
func main() {
image := canvas.New()
// Opening some image from disk.
err := image.Open("input/example.png")
if err == nil {
defer image.Destroy()
// Photo auto orientation based on EXIF tags.
image.AutoOrientate()
// Creating a squared thumbnail
image.Thumbnail(100, 100)
// Saving the thumbnail to disk.
image.Write("output/example-thumbnail.png")
} else {
fmt.Printf("Could not open image: %s\n", err)
}
}