Spring AI Need HTTP header support for Anthropic

Expected Behavior We need a way to pass headers via AnthropicChatOptions.

AnthropicChatOptions.builder().httpHeaders(...).build(), 

Current Behavior Currently we cannot elegantly modify Http Headers for Anthropic (apart from using HttpInterceptors). However, we have a way to do it if it is OpenAI through OpenAiChatOptions

Context Our enterprise has a wrapper on top Anthropic LLM and we need to pass few additional headers and we have no way to do it today.

Comment From: avanathan

cc: @tzolov

Comment From: dev-jonghoonpark

@avanathan I'm curious, what can be set through headers? (I don't know much about the Anthropic API.)

Comment From: tzolov

@avanathan , your suggestion makes sense. Anthropic uses the http-headers (https://docs.anthropic.com/en/api/messages#parameter-anthropic-beta) for various config options.

Comment From: avanathan

Great! Thanks for sharing @tzolov