init bedrock support

Signed-off-by: npolshakova <[email protected]>

Author: npolshakova

source/extensions/filters/http/transformation/ai_transformer.cc

@@ -529,7 +529,19 @@ std::tuple<bool, bool> AiTransformer::transformHeaders(
     } else {
       absl::StrAppend(&path,
                       AiTransformerConstants::get().GEMINI_GENERATE_CONTENT);
-    }
+  }
+    } else if (provider == AiTransformerConstants::get().PROVIDER_BEDROCK) {
+          ASSERT(!model.empty(), "Bedrock: required model setting is missing!");
+          path = replaceModelInPath(
+                  lookupEndpointMetadata(endpoint_metadata, "base_path"), model);
+          if (enable_chat_streaming_) {
+          absl::StrAppend(
+                    &path, AiTransformerConstants::get().BEDROCK_CONVERSE_STREAM
+          } else {
+            absl::StrAppend(&path,
+                                AiTransformerConstants::get().BEDROCK_CONVERSE);
+          }
+      }
 
     // Gemini doc is still using the `key` qs param but the Google GenAI sdk has
     // switched to use the `x-goog-api-key` header. Here is the reason we also

source/extensions/filters/http/transformation/ai_transformer.h

@@ -25,15 +25,20 @@ struct AiTransformerValues {
   const std::string PROVIDER_GEMINI{"gemini"};
   const std::string PROVIDER_OPENAI{"openai"};
   const std::string PROVIDER_VERTEXAI{"vertexai"};
+  const std::string PROVIDER_BEDROCK{"bedrock"};
 
   const std::string SCHEMA_ANTHROPIC{"anthropic"};
   const std::string SCHEMA_GEMINI{"gemini"};
   const std::string SCHEMA_OPENAI{"openai"};
+  const std::string SCHEMA_BEDROCK{"bedrock"};
 
   const std::string GEMINI_GENERATE_CONTENT{"generateContent"};
   const std::string GEMINI_STREAM_GENERATE_CONTENT{"streamGenerateContent"};
   const std::string GEMINI_STREAM_QS_PARAM{"alt=sse"};
 
+  const std::string BEDROCK_CONVERSE{"converse"};
+  const std::string BEDROCK_CONVERSE_STREAM{"converse-stream"};
+
   const Http::LowerCaseString AnthropicApiKeyHeader{"x-api-key"};
   const Http::LowerCaseString AnthropicVersionHeader{"anthropic-version"};
   const Http::LowerCaseString AzureApiKeyHeader{"api-key"};