Golang implementation of fastimage.
Finds the type and/or size of an image given its uri by fetching as little as needed.
RECREATED and IMPROVED fastimage for golang.
Started from Ruben Fonseca (@rubenfonseca) 's fastimage https://github.com/rubenfonseca/fastimage
Included TIFF and WEBP support from https://github.com/golang/image
fastimage parses the image data as it is downloaded. As soon as it finds out the size and type of the image, it stops the download.
$ go get github.com/sillydong/fastimage
For instance, this is a big 10MB JPEG image on wikipedia:
Method1
customHeaders := map[string]string{
"X-SECRET-HEADER": "your-header-value"
}
instance := fastimage.NewFastImage(2, customHeaders)
//leave it to nil to use default header settings
//eg.
//instance := fastimage.NewFastImage(2, nil)
url1 := "http://upload.wikimedia.org/wikipedia/commons/9/9a/SKA_dishes_big.jpg"
imagetype1, size1, err1 := instance.Detect(url1)
fmt.Printf("%+v\t%+v\t%+v\n", imagetype1, size1, err1)
url2 := "http://upload.wikimedia.org/wikipedia/commons/9/9a/SKA_dishes_big.jpg"
imagetype2, size2, err2 := instance.Detect(url2)
fmt.Printf("%+v\t%+v\t%+v\n", imagetype2, size2, err2)Method2
url1 := "http://upload.wikimedia.org/wikipedia/commons/9/9a/SKA_dishes_big.jpg"
imagetype1, size1, err1 := fastimage.GetImageSize(url1)
fmt.Printf("%+v\t%+v\t%+v\n", imagetype1, size1, err1)
url2 := "http://upload.wikimedia.org/wikipedia/commons/9/9a/SKA_dishes_big.jpg"
imagetype2, size2, err2 := fastimage.GetImageSize(url2)
fmt.Printf("%+v\t%+v\t%+v\n", imagetype2, size2, err2)Notice
Method1 is better to detect multiple images because it shares one *http.Client.
| File type | Can detect type? | Can detect size? |
|---|---|---|
| PNG | Yes | Yes |
| JPEG | Yes | Yes |
| GIF | Yes | Yes |
| BMP | Yes | Yes |
| TIFF | Yes | Yes |
| WEBP | Yes | Yes |
Notice
Some webp images' Content-Type in header is text/plain. Here in this library we only parse response data when Content-Type has keyword "image" in.
I'm thinking about using valyala/fasthttp to replace net/http to get better network performance.
fastimage is under MIT license. See the LICENSE file for details.