wip: migrate to mono-repo. SPN has already been moved to spn/

spn/access/account/auth.go

@@ -0,0 +1,65 @@
+package account
+
+import (
+	"errors"
+	"net/http"
+)
+
+// Authentication Headers.
+const (
+	AuthHeaderDevice              = "Device-17"
+	AuthHeaderToken               = "Token-17"
+	AuthHeaderNextToken           = "Next-Token-17"
+	AuthHeaderNextTokenDeprecated = "Next_token_17"
+)
+
+// Errors.
+var (
+	ErrMissingDeviceID = errors.New("missing device ID")
+	ErrMissingToken    = errors.New("missing token")
+)
+
+// AuthToken holds an authentication token.
+type AuthToken struct {
+	Device string
+	Token  string
+}
+
+// GetAuthTokenFromRequest extracts an authentication token from a request.
+func GetAuthTokenFromRequest(request *http.Request) (*AuthToken, error) {
+	device := request.Header.Get(AuthHeaderDevice)
+	if device == "" {
+		return nil, ErrMissingDeviceID
+	}
+	token := request.Header.Get(AuthHeaderToken)
+	if token == "" {
+		return nil, ErrMissingToken
+	}
+
+	return &AuthToken{
+		Device: device,
+		Token:  token,
+	}, nil
+}
+
+// ApplyTo applies the authentication token to a request.
+func (at *AuthToken) ApplyTo(request *http.Request) {
+	request.Header.Set(AuthHeaderDevice, at.Device)
+	request.Header.Set(AuthHeaderToken, at.Token)
+}
+
+// GetNextTokenFromResponse extracts an authentication token from a response.
+func GetNextTokenFromResponse(resp *http.Response) (token string, ok bool) {
+	token = resp.Header.Get(AuthHeaderNextToken)
+	if token == "" {
+		// TODO: Remove when fixed on server.
+		token = resp.Header.Get(AuthHeaderNextTokenDeprecated)
+	}
+
+	return token, token != ""
+}
+
+// ApplyNextTokenToResponse applies the next authentication token to a response.
+func ApplyNextTokenToResponse(w http.ResponseWriter, token string) {
+	w.Header().Set(AuthHeaderNextToken, token)
+}