Ollama: Support custom Ollama API paths

[lambochen]

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Hi, This PR is a feature enhancement change that supports custom Ollama API paths.

Background: When implementing Spring AI in my project, I made some adjustments to the Ollama API, and the API provided externally is a custom path. Therefore, I expect the Spring AI Ollama Model to support custom paths.

Current behavior: The Ollama API path is fixed in the hard-coded code, for example:

public ListModelResponse listModels() {
	return this.restClient.get()
			.uri("/api/tags")
			.retrieve()
			.body(ListModelResponse.class);
}

[lambochen]

ref: #3471

[lambochen]

@ThomasVitale @dev-jonghoonpark
Hi, please review the PR, thank you.

[dev-jonghoonpark]

Just out of personal curiosity, Can you be more specific with your example?
I've seen the OpenAI API compatible API many times, but this is the first time I've seen the
Ollama API compatible format.

[lambochen]

but this is the first time I've seen the Ollama API compatible format.

Thank you for your interest in this capability.
I am working on an experimental service where ollama is deployed remotely (non-local environment), providing platform services to developers. Due to the numerous APIs exposed by the platform, there has been an issue of path conflicts, so it is necessary to support customizing the Ollama API path.

I've seen the OpenAI API compatible API many times

Yes, for similar solutions, we also have custom path requirements for OpenAI and other models (such as DeepSeek).

[eddumelendez]

I don't think the connection details should be updated. The connection details to connect to ollama is the baseUrl only.