package rpcserver import ( "encoding/hex" "net/http" "regexp" "strconv" "github.com/pkg/errors" ) var ( // Parts of regular expressions atom = "[A-Z0-9!#$%&'*+\\-/=?^_`{|}~]+" dotAtom = atom + `(?:\.` + atom + `)*` domain = `[A-Z0-9.-]+\.[A-Z]{2,4}` ReInt = regexp.MustCompile(`^-?[0-9]+$`) ReHex = regexp.MustCompile(`^(?i)[a-f0-9]+$`) ReEmail = regexp.MustCompile(`^(?i)(` + dotAtom + `)@(` + dotAtom + `)$`) ReAddress = regexp.MustCompile(`^(?i)[a-z0-9]{25,34}$`) ReHost = regexp.MustCompile(`^(?i)(` + domain + `)$`) //RE_ID12 = regexp.MustCompile(`^[a-zA-Z0-9]{12}$`) ) func GetParam(r *http.Request, param string) string { s := r.URL.Query().Get(param) if s == "" { s = r.FormValue(param) } return s } func GetParamByteSlice(r *http.Request, param string) ([]byte, error) { s := GetParam(r, param) return hex.DecodeString(s) } func GetParamInt64(r *http.Request, param string) (int64, error) { s := GetParam(r, param) i, err := strconv.ParseInt(s, 10, 64) if err != nil { return 0, errors.Errorf(param, err.Error()) } return i, nil } func GetParamInt32(r *http.Request, param string) (int32, error) { s := GetParam(r, param) i, err := strconv.ParseInt(s, 10, 32) if err != nil { return 0, errors.Errorf(param, err.Error()) } return int32(i), nil } func GetParamUint64(r *http.Request, param string) (uint64, error) { s := GetParam(r, param) i, err := strconv.ParseUint(s, 10, 64) if err != nil { return 0, errors.Errorf(param, err.Error()) } return i, nil } func GetParamUint(r *http.Request, param string) (uint, error) { s := GetParam(r, param) i, err := strconv.ParseUint(s, 10, 64) if err != nil { return 0, errors.Errorf(param, err.Error()) } return uint(i), nil } func GetParamRegexp(r *http.Request, param string, re *regexp.Regexp) (string, error) { s := GetParam(r, param) if !re.MatchString(s) { return "", errors.Errorf(param, "did not match regular expression %v", re.String()) } return s, nil } func GetParamFloat64(r *http.Request, param string) (float64, error) { s := GetParam(r, param) f, err := strconv.ParseFloat(s, 64) if err != nil { return 0, errors.Errorf(param, err.Error()) } return f, nil }