Imports github.com/h2non/bimg github.com/h2non/filetype github.com/rs/cors gopkg.in/throttled/throttled.v2 gopkg.in/throttled/throttled.v2/store/memstore Standard library imports context crypto/hmac crypto/sha256 encoding/base64 encoding/json errors flag fmt io io/ioutil log math mime net/http net/url os os/signal path runtime runtime/debug strconv strings syscall time