protobuf: refactor proto visitor pattern. #10354
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Move the proto traversal handling in version_converter.cc to a standalone library. This lets us replace existing proto visitor patterns in common/protobuf/utility.cc for unexpected field checks. The redaction code is actually a bit more involved, so I'm not refactoring this; it needs to recurse through Any/TypedStruct. Ultimately we might want something like this, but it doesn't seem super helpful given we only have a the single instance of this right now. Risk level: Low Testing: Existing tests continue to pass. Signed-off-by: Harvey Tuch <htuch@google.com>
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@alyssawilk this continues #9807; I didn't seem to be able to reopen that PR. |
alyssawilk
approved these changes
Mar 13, 2020
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| // We use the validation visitor but have hard coded behavior below for deprecated fields. | ||
| // TODO(htuch): Unify the deprecated and unknown visitor handling behind the validation | ||
| // visitor pattern. https://github.com/envoyproxy/envoy/issues/8092. |
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Checking: you still have further cleanup plans?
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Yeah. This PR just refactors some proto traversal stuff. #8092 tracks the more general "move the deprecated field error reporting and exception generation to the validation visitor callbacks", i.e. having an onDeprecatedField() callback alongside onUnknownField() in ValidationVisitor. This is mostly a mechanical code movement that shouldn't really change any existing behavior. @nezdolik FYI.
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Move the proto traversal handling in version_converter.cc to a
standalone library. This lets us replace existing proto visitor patterns in
common/protobuf/utility.cc for unexpected field checks.
The redaction code is actually a bit more involved, so I'm not
refactoring this; it needs to recurse through Any/TypedStruct.
Ultimately we might want something like this, but it doesn't seem super
helpful given we only have a the single instance of this right now.
Risk level: Low
Testing: Existing tests continue to pass.
Signed-off-by: Harvey Tuch htuch@google.com