Azure OpenAI support

[borisdev]

Summary

This PR adds Azure OpenAI as a provider - integration to the proxy server.

uv run uvicorn server:app --host 0.0.0.0 --port 8082 --reload
uv run python3 tests.py --azure-only

Key Features Added

• Now people using OpenAI models via Azure can use this library. The code changes address the problem that Azure OpenAI requires more arguments in a request than OpenAI.

Basic Azure Usage

1. Set Azure configuration in .env file:

   AZURE_OPENAI_ENDPOINT="https://your-resource.openai.azure.com"
   AZURE_OPENAI_API_KEY="your-azure-openai-api-key"
   AZURE_API_VERSION="2025-01-01-preview"
   AZURE_DEPLOYMENT_NAME="gpt-4"

2. Use model format in requests: azure/your-deployment-name

[Copilot]

Pull Request Overview

This PR integrates Azure OpenAI support into the existing proxy, allowing requests prefixed with azure/ to route through Azure deployments.

• Introduces Azure environment variables and validation logic in server.py
• Extends request handling to set Azure credentials and endpoint in LiteLLM calls
• Adds two test scripts to verify direct and proxy-based Azure connectivity

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
server.py	Added Azure config, updated model routing, and extended OpenAI logic to support Azure models
test_azure_proxy.py	New script to verify proxy routing for azure/ prefixed models
test_azure_openai.py	New script for direct Azure OpenAI connectivity via LiteLLM
.env.example	Added commented Azure configuration section

Comments suppressed due to low confidence (1)

server.py:1695

• Variable endpoint is undefined; the function signature uses path. Change endpoint to path or update the parameter name accordingly.

    log_line = f"{Colors.BOLD}{method} {endpoint}{Colors.RESET} {status_str}"

[borisdev]

@1rgs

[dsyme]

@borisdev There are very many unrelated changes in the server.py - it looks like you've applied formatting rules etc.

Could you revert all the unnecessary changes so this will reduce the merge conflicts with things like #39 please? I'd also like to more properly read the changes you've made to see if I've missed anything

[borisdev]

@borisdev There are very many unrelated changes in the server.py - it looks like you've applied formatting rules etc.

Could you revert all the unnecessary changes so this will reduce the merge conflicts with things like #39 please? I'd also like to more properly read the changes you've made to see if I've missed anything

fixed