Allow restricting file download

protos/ezshare.proto

@@ -21,6 +21,9 @@ message File {
         google.protobuf.Timestamp uploaded_on = 1;
         google.protobuf.Timestamp expires_on = 2;
         string original_filename = 3;
+        string passcode = 4;
+        int64 current_views = 5;
+        int64 max_views = 6;
     };
 
     Metadata metadata = 3;
@@ -33,6 +36,8 @@ message UploadFileRequest {
     bytes data = 1;
     string original_filename = 2;
     google.protobuf.Timestamp expires_on = 3;
+    int64 max_views = 4;
+    bool with_passcode = 5;
 }
 message UploadFileResponse {
     string id = 1;
@@ -42,6 +47,7 @@ message UploadFileResponse {
 // Get
 message GetFileRequest {
     string id = 1;
+    string passcode = 2;
 }
 message GetFileResponse {
     File file = 1;