istio.io/istio@v0.0.0-20240520182934-d79c90f27776/samples/wasm_modules/header_injector/plugin.h (about)

     1  // Copyright Istio Authors. All Rights Reserved.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  #include "proxy_wasm_intrinsics.h"
    16  
    17  class HeaderInjectorRootContext : public RootContext {
    18   public:
    19    explicit HeaderInjectorRootContext(uint32_t id, std::string_view root_id)
    20        : RootContext(id, root_id) {}
    21  
    22    bool onConfigure(size_t) override;
    23  };
    24  
    25  class HeaderInjectorContext : public Context {
    26   public:
    27    explicit HeaderInjectorContext(uint32_t id, RootContext* root) : Context(id, root) {}
    28  
    29    FilterHeadersStatus onRequestHeaders(uint32_t, bool) override;
    30    FilterHeadersStatus onResponseHeaders(uint32_t, bool) override;
    31  
    32   private:
    33    inline HeaderInjectorRootContext* rootContext() {
    34      return dynamic_cast<HeaderInjectorRootContext*>(this->root());
    35    }
    36  };