@@ -63,8 +63,11 @@ struct LoginForm<S: Session>: View {
6363guard sessionToken!= " " else {
6464return
6565}
66- guard let url= URL ( string: baseAccessURL) , url. scheme== " https " else {
67- loginError= . invalidURL
66+ let url : URL
67+ do {
68+ url= try validateURL ( baseAccessURL)
69+ } catch {
70+ loginError= error
6871return
6972}
7073 loading= true
@@ -152,8 +155,10 @@ struct LoginForm<S: Session>: View {
152155guard baseAccessURL!= " " else {
153156return
154157}
155- guard let url= URL ( string: baseAccessURL) , url. scheme== " https " else {
156- loginError= . invalidURL
158+ do {
159+ try validateURL ( baseAccessURL)
160+ } catch {
161+ loginError= error
157162return
158163}
159164withAnimation {
@@ -170,12 +175,32 @@ struct LoginForm<S: Session>: View {
170175}
171176}
172177
173- enum LoginError {
178+ @discardableResult
179+ func validateURL( _ url: String ) throws ( LoginError) -> URL {
180+ guard let url= URL ( string: url) else {
181+ throw LoginError . invalidURL
182+ }
183+ guard url. scheme== " https " else {
184+ throw LoginError . httpsRequired
185+ }
186+ guard url. host!= nil else {
187+ throw LoginError . noHost
188+ }
189+ return url
190+ }
191+
192+ enum LoginError : Error {
193+ case httpsRequired
194+ case noHost
174195case invalidURL
175196case failedAuth( ClientError )
176197
177198var description : String {
178199switch self {
200+ case . httpsRequired:
201+ " URL must use HTTPS "
202+ case . noHost:
203+ " URL must have a host "
179204case . invalidURL:
180205" Invalid URL "
181206case let . failedAuth( err) :