[Feature Request]: Cloudflare AI Gateway Support

[centminmod]

Is there an existing issue for the same feature request?

• [x] I have checked the existing issues.

Is your feature request related to a problem?

Describe the feature you'd like

Hi I use OpenRouter AI API via Cloudflare AI Gateway proxy for prompt request caching https://developers.cloudflare.com/ai-gateway/providers/openrouter/.

This usually means I need to pass a Cloudflare AI Gateway authentication header https://developers.cloudflare.com/ai-gateway/configuration/authentication/ along with the OpenRouter AI API key.

curl https://gateway.ai.cloudflare.com/v1/{account_id}/{gateway_id}/openai/chat/completions \
  --header 'cf-aig-authorization: Bearer {CF_AIG_TOKEN}' \
  --header 'Authorization: Bearer OPENAI_TOKEN' \
  --header 'Content-Type: application/json' \
  --data '{"model": "gpt-3.5-turbo", "messages": [{"role": "user", "content": "What is Cloudflare?"}]}'

But Ragflow doesn't currently support passing additional headers for such Cloudflare AI Gateway authentication. Would be nice if you add such a feature 😃

Example Cloudflare AI Gateway analytics for Openrouter AI API usage

Describe implementation you've considered

No response

Documentation, adoption, use case

Additional information

No response