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matcher: Implement CEL matcher (envoyproxy#27527)
Signed-off-by: tyxia <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,25 @@ | ||
| load( | ||
| "//bazel:envoy_build_system.bzl", | ||
| "envoy_cc_extension", | ||
| "envoy_extension_package", | ||
| ) | ||
|
|
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| licenses(["notice"]) # Apache 2 | ||
|
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| envoy_extension_package() | ||
|
|
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| envoy_cc_extension( | ||
| name = "cel_input_lib", | ||
| srcs = ["cel_input.cc"], | ||
| hdrs = ["cel_input.h"], | ||
| extra_visibility = [ | ||
| ], | ||
| deps = [ | ||
| "//envoy/http:filter_interface", | ||
| "//envoy/http:header_map_interface", | ||
| "//source/common/http:header_utility_lib", | ||
| "//source/common/http:utility_lib", | ||
| "//source/extensions/filters/common/expr:evaluator_lib", | ||
| "@envoy_api//envoy/type/matcher/v3:pkg_cc_proto", | ||
| ], | ||
| ) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,18 @@ | ||
| #include "source/extensions/matching/http/cel_input/cel_input.h" | ||
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| #include "envoy/registry/registry.h" | ||
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| namespace Envoy { | ||
| namespace Extensions { | ||
| namespace Matching { | ||
| namespace Http { | ||
| namespace CelInput { | ||
|
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| REGISTER_FACTORY(HttpCelDataInputFactory, | ||
| Matcher::DataInputFactory<::Envoy::Http::HttpMatchingData>); | ||
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| } // namespace CelInput | ||
| } // namespace Http | ||
| } // namespace Matching | ||
| } // namespace Extensions | ||
| } // namespace Envoy |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,82 @@ | ||
| #pragma once | ||
|
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| #include "envoy/http/filter.h" | ||
| #include "envoy/matcher/matcher.h" | ||
| #include "envoy/server/factory_context.h" | ||
| #include "envoy/type/matcher/v3/http_inputs.pb.h" | ||
| #include "envoy/type/matcher/v3/http_inputs.pb.validate.h" | ||
|
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| #include "source/common/http/header_utility.h" | ||
| #include "source/common/http/utility.h" | ||
| #include "source/extensions/filters/common/expr/evaluator.h" | ||
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| #include "xds/type/matcher/v3/http_inputs.pb.h" | ||
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| namespace Envoy { | ||
| namespace Extensions { | ||
| namespace Matching { | ||
| namespace Http { | ||
| namespace CelInput { | ||
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| using ::Envoy::Http::RequestHeaderMapOptConstRef; | ||
| using ::Envoy::Http::ResponseHeaderMapOptConstRef; | ||
| using ::Envoy::Http::ResponseTrailerMapOptConstRef; | ||
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| using BaseActivationPtr = std::unique_ptr<google::api::expr::runtime::BaseActivation>; | ||
|
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| // CEL matcher specific matching data | ||
| class CelMatchData : public ::Envoy::Matcher::CustomMatchData { | ||
| public: | ||
| explicit CelMatchData(BaseActivationPtr activation) : activation_(std::move(activation)) {} | ||
| BaseActivationPtr activation_; | ||
| }; | ||
|
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| class HttpCelDataInput : public Matcher::DataInput<Envoy::Http::HttpMatchingData> { | ||
| public: | ||
| HttpCelDataInput() = default; | ||
| Matcher::DataInputGetResult get(const Envoy::Http::HttpMatchingData& data) const override { | ||
| RequestHeaderMapOptConstRef maybe_request_headers = data.requestHeaders(); | ||
| ResponseHeaderMapOptConstRef maybe_response_headers = data.responseHeaders(); | ||
| ResponseTrailerMapOptConstRef maybe_response_trailers = data.responseTrailers(); | ||
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| // Returns NotAvailable state when all of three below are empty. | ||
| if (!maybe_request_headers && !maybe_response_headers && !maybe_response_trailers) { | ||
| return {Matcher::DataInputGetResult::DataAvailability::NotAvailable, absl::monostate()}; | ||
| } | ||
|
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| // CEL library supports mixed matching condition of request headers, response headers and | ||
| // response trailers. | ||
| std::unique_ptr<google::api::expr::runtime::BaseActivation> activation = | ||
| Extensions::Filters::Common::Expr::createActivation( | ||
| data.streamInfo(), maybe_request_headers.ptr(), maybe_response_headers.ptr(), | ||
| maybe_response_trailers.ptr()); | ||
|
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| return {Matcher::DataInputGetResult::DataAvailability::AllDataAvailable, | ||
| std::make_unique<CelMatchData>(std::move(activation))}; | ||
| } | ||
|
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| absl::string_view dataInputType() const override { return "cel_data_input"; } | ||
| }; | ||
|
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| class HttpCelDataInputFactory : public Matcher::DataInputFactory<Envoy::Http::HttpMatchingData> { | ||
| public: | ||
| HttpCelDataInputFactory() = default; | ||
| std::string name() const override { return "envoy.matching.inputs.cel_data_input"; } | ||
|
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| Matcher::DataInputFactoryCb<Envoy::Http::HttpMatchingData> | ||
| createDataInputFactoryCb(const Protobuf::Message&, ProtobufMessage::ValidationVisitor&) override { | ||
| return [] { return std::make_unique<HttpCelDataInput>(); }; | ||
| } | ||
|
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| ProtobufTypes::MessagePtr createEmptyConfigProto() override { | ||
| return std::make_unique<xds::type::matcher::v3::HttpAttributesCelMatchInput>(); | ||
| } | ||
| }; | ||
|
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| DECLARE_FACTORY(HttpCelDataInputFactory); | ||
|
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| } // namespace CelInput | ||
| } // namespace Http | ||
| } // namespace Matching | ||
| } // namespace Extensions | ||
| } // namespace Envoy |
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