Support global-agent for central proxy configuration #3423
Merged
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With central configuration of global agent via environment variables, the proxy agent is included in all node-fetch requests without any code changes and thus it is no longer necessary to implement the proxy URL in each ChatModel. Currently, the ProxyUrl is implemented in ChatOpenAI_ChatModels and as an example is still required in AzureChatOpenAI_ChatModels. The existing proxy mechanism would continue to work if required, because the global agent can be deactivated by a missing environment variable.