fastimage

golang版本的fastimage，脱胎于python的 fastimage.

能够在取尽可能少数据的情况下获取图片尺寸。

参考了Ruben Fonseca(@rubenfonseca)的fastimage库 https://github.com/rubenfonseca/fastimage

从golang官方的imagehttps://github.com/golang/image中取到了WEBP及TIFF图片尺寸解析的逻辑

How?

从网络按需读取数据，得到尺寸后即断开请求。

Install

$ go get github.com/sillydong/fastimage

Usage

取一张10MB的JPEG图片：

url := "http://upload.wikimedia.org/wikipedia/commons/9/9a/SKA_dishes_big.jpg"

imagetype, size, err := fastimage.DetectImageType(url)
if err != nil {
    // Something went wrong, http failed? not an image?
    panic(err)
}

switch imagetype {
case fastimage.JPEG:
    log.Printf("JPEG")
case fastimage.PNG:
    log.Printf("PNG")
case fastimage.GIF:
    log.Printf("GIF")
case fastimage.BMP:
    log.Printf("BMP")
case fastimage.WEBP:
    log.Printf("WEBP")
case fastimage.TIFF:
    log.Printf("TIFF")
}

log.Printf("Image type: %s", imagetype.String())
log.Printf("Image size: %v", size)

Supported file types

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

附PHP版本的fastimage

https://github.com/sillydong/phpfastimage