Workflow Overview

When a client sends a request to the AIClient-2-API's API service, the general workflow is as follows:

1. Request Reception: api-server.js receives the client's request.
2. Authentication and Routing: api-server.js performs API key authentication and determines the target LLM provider and request type (content generation, model list) based on the request path and header information.
3. Request Conversion (From Client -> Internal): If the client's request format does not match the native format of the internal target LLM, convert.js converts the request body to the format required by the internal target LLM.
4. Strategy Application: provider-strategies.js loads and executes the corresponding strategy based on the target LLM protocol, handling LLM-specific logic (e.g., merging system prompts).
5. API Call: adapter.js obtains the corresponding ApiServiceAdapter instance based on the determined target LLM provider and calls its generateContent or listModels method. This method internally calls the specific *-core.js module to communicate with the actual LLM.
6. Response Reception and Conversion (From Internal -> Client): After the LLM returns a native response, the *-core.js module returns it to adapter.js. If the client's desired response format differs from the LLM's native format, convert.js intervenes again to convert the response to the format expected by the client.
7. Response Sending: api-server.js sends the final response back to the client.

Through this layered and modular design, AIClient-2-API achieves a high degree of flexibility and maintainability, allowing for easy expansion to support new LLMs or API formats, while providing a unified access experience for users.