Azure OpenAI Proxy

Introduction

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Azure OpenAI Proxy is a proxy for Azure OpenAI API that can convert an OpenAI request to an Azure OpenAI request. It is designed to use as a backend for various open source ChatGPT web project. It also supports being used as a simple OpenAI API proxy to solve the problem of OpenAI API being restricted in some regions.

Highlights:

• 🌐 Supports proxying all Azure OpenAI APIs
• 🧠 Supports proxying all Azure OpenAI models and custom fine-tuned models
• 🗺️ Supports custom mapping between Azure deployment names and OpenAI models
• 🔄 Supports both reverse proxy and forward proxy usage
• 👍 Support mocking of OpenAI APIs that are not supported by Azure.

Supported APIs

The latest version of the Azure OpenAI service currently supports the following 3 APIs:

Path	Status
/v1/chat/completions	✅
/v1/completions	✅
/v1/embeddings	✅

Other APIs not supported by Azure will be returned in a mock format (such as OPTIONS requests initiated by browsers). If you find your project need additional OpenAI-supported APIs, feel free to submit a PR.

Recently Updated

• 2023-04-06 supported /v1/models interface, fixed the issue of some web projects depending on models interface error.
• 2023-04-04 supported options interface, fixed the cross-domain check error issue of some web projects.

Usage

1. Used as reverse proxy (i.e. an OpenAI API gateway)

Environment Variables

Parameters	Description	Default Value
AZURE_OPENAI_PROXY_ADDRESS	Service listening address	0.0.0.0:8080
AZURE_OPENAI_PROXY_MODE	Proxy mode, can be either "azure" or "openai".	azure
AZURE_OPENAI_ENDPOINT	Azure OpenAI Endpoint, usually looks like https://{custom}.openai.azure.com. Required.
AZURE_OPENAI_APIVERSION	Azure OpenAI API version. Default is 2023-03-15-preview.	2023-03-15-preview
AZURE_OPENAI_MODEL_MAPPER	A comma-separated list of model=deployment pairs. Maps model names to deployment names. For example, gpt-3.5-turbo=gpt-35-turbo, gpt-3.5-turbo-0301=gpt-35-turbo-0301. If there is no match, the proxy will pass model as deployment name directly (in fact, most Azure model names are same with OpenAI).	gpt-3.5-turbo=gpt-35-turbo gpt-3.5-turbo-0301=gpt-35-turbo-0301
AZURE_OPENAI_TOKEN	Azure OpenAI API Token. If this environment variable is set, the token in the request header will be ignored.	""

Use in command line

curl https://{your-custom-domain}/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer {your azure api key}" \
  -d '{
    "model": "gpt-3.5-turbo",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

2. Used as forward proxy (i.e. an HTTP proxy)

When accessing Azure OpenAI API through HTTP, it can be used directly as a proxy, but this tool does not have built-in HTTPS support, so you need an HTTPS proxy such as Nginx to support accessing HTTPS version of OpenAI API.

Assuming that the proxy domain you configured is https://{your-domain}.com, you can execute the following commands in the terminal to use the https proxy:

export https_proxy=https://{your-domain}.com

curl https://api.openai.com/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer {your azure api key}" \
  -d '{
    "model": "gpt-3.5-turbo",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

Or configure it as an HTTP proxy in other open source Web ChatGPT projects:

export HTTPS_PROXY=https://{your-domain}.com

Deploy

Deploying through Docker

docker pull ishadows/azure-openai-proxy:latest
docker run -d -p 8080:8080 --name=azure-openai-proxy \
  --env AZURE_OPENAI_ENDPOINT={your azure endpoint} \
  --env AZURE_OPENAI_MODEL_MAPPER={your custom model mapper ,like: gpt-3.5-turbo=gpt-35-turbo,gpt-3.5-turbo-0301=gpt-35-turbo-0301} \
  ishadows/azure-openai-proxy:latest

Calling

curl https://localhost:8080/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer {your azure api key}" \
  -d '{
    "model": "gpt-3.5-turbo",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

Model Mapping Mechanism

There are a series of rules for model mapping pre-defined in AZURE_OPENAI_MODEL_MAPPER, and the default configuration basically satisfies the mapping of all Azure models. The rules include:

• gpt-3.5-turbo -> gpt-35-turbo
• gpt-3.5-turbo-0301 -> gpt-35-turbo-0301
• A mapping mechanism that pass model name directly as fallback.

For custom fine-tuned models, the model name can be passed directly. For models with deployment names different from the model names, custom mapping relationships can be defined, such as:

Model Name	Deployment Name
gpt-3.5-turbo	gpt-35-turbo-upgrade
gpt-3.5-turbo-0301	gpt-35-turbo-0301-fine-tuned

License

MIT

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