Line data    Source code

       1             : #pragma once
       2             : 
       3             : #include "envoy/formatter/substitution_formatter.h"
       4             : #include "envoy/http/header_map.h"
       5             : #include "envoy/stream_info/stream_info.h"
       6             : 
       7             : namespace Envoy {
       8             : namespace Http {
       9             : 
      10             : // The interface of applying operations to a header map.
      11             : class HeaderEvaluator {
      12             : public:
      13         417 :   virtual ~HeaderEvaluator() = default;
      14             :   /**
      15             :    * Apply the header operations that are saved in the HeaderEvaluator. An example of the operation
      16             :    * is to add a new header name `foo` to the target header map and the header value is extracted
      17             :    * from the `bar` field in the stream_info, request headers or response headers.
      18             :    *
      19             :    * @param headers the target header map to be mutated.
      20             :    * @param context context to format the header value.
      21             :    * @param stream_info the source of values that can be used in the evaluation.
      22             :    */
      23             :   virtual void evaluateHeaders(Http::HeaderMap& headers,
      24             :                                const Formatter::HttpFormatterContext& context,
      25             :                                const StreamInfo::StreamInfo& stream_info) const PURE;
      26             : };
      27             : } // namespace Http
      28             : } // namespace Envoy