diff f8fa0c987fd6be6622a1d669e4025dca374bc853 uncommitted
--- a/sys/src/cmd/webfs/http.c
+++ b/sys/src/cmd/webfs/http.c
@@ -373,18 +373,21 @@
 	user = u->user;
 	pass = u->pass;
 	realm = nonce = opaque = nil;
-	if(!cistrncmp(s, "Basic ", 6)){
+	if(!cistrncmp(s, "Basic", 5)){
 		UserPasswd *up;
 
-		s += 6;
-		if(x = cistrstr(s, "realm="))
-			realm = unquote(x+6, &s);
-		if(realm == nil)
-			return -1;
+		s += 5;
+		if(strlen(s) > 0){
+			if(s[0] != ' ')
+				return -1;
+			if(x = cistrstr(s, "realm="))
+				realm = unquote(x+6, &s);
+		}
 		up = nil;
 		if(user == nil || pass == nil){
 			fmtstrinit(&fmt);
-			fmtprint(&fmt, " realm=%q", realm);
+			if (realm)
+				fmtprint(&fmt, " realm=%q", realm);
 			if(user)
 				fmtprint(&fmt, " user=%q", user);
 			if((s = fmtstrflush(&fmt)) == nil)