Imports github.com/boombuler/barcode github.com/boombuler/barcode/qr github.com/dchest/captcha github.com/fishedee/encoding github.com/fishedee/language github.com/gorilla/websocket github.com/shopspring/decimal Standard library imports bytes compress/flate compress/gzip container/list crypto/rand crypto/tls encoding/hex encoding/json errors fmt image image/gif image/jpeg image/png io io/ioutil math/rand mime/multipart net net/http net/http/cookiejar net/url os os/exec reflect strconv strings sync time