Imports github.com/disintegration/imaging github.com/gregjones/httpcache golang.org/x/image/tiff golang.org/x/image/webp willnorris.com/go/gifresize willnorris.com/go/imageproxy/third_party/http github.com/muesli/smartcrop github.com/rwcarlsen/goexif/exif Standard library imports image io io/ioutil log math net/http net/url regexp strconv strings time image/png crypto/hmac image/jpeg image/gif bufio bytes crypto/sha256 encoding/base64 fmt