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add model mapping #13

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add model mapping #13

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32 changes: 24 additions & 8 deletions cf-openai-azure-proxy.js
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Original file line number Diff line number Diff line change
@@ -1,11 +1,12 @@
// The name of your Azure OpenAI Resource.
const resourceName=RESOURCE_NAME
// The name of your Azure OpenAI Resource for GPT-3.5 and GPT-4.
const resourceNameGPT35 = RESOURCE_NAME_GPT35;
const resourceNameGPT4 = RESOURCE_NAME_GPT4;

// The deployment name you chose when you deployed the model.
const deployName=DEPLOY_NAME

const apiVersion="2023-03-15-preview"
// The deployment name you chose when you deployed the model for GPT-3.5 and GPT-4.
const deployNameGPT35 = DEPLOY_NAME_GPT35;
const deployNameGPT4 = DEPLOY_NAME_GPT4;

const apiVersion = "2023-03-15-preview";

addEventListener("fetch", (event) => {
event.respondWith(handleRequest(event.request));
Expand All @@ -27,11 +28,16 @@ async function handleRequest(request) {
return new Response('404 Not Found', { status: 404 })
}

const fetchAPI = `https://${resourceName}.openai.azure.com/openai/deployments/${deployName}/${path}?api-version=${apiVersion}`

let body;
if (request.method === 'POST') {
body = await request.json();
}
const modelName = body && body.model ? body.model : "gpt-3.5-turbo";
const { resourceName, deployName } = getModelMapper(modelName);

const fetchAPI = `https://${resourceName}.openai.azure.com/openai/deployments/${deployName}/${path}?api-version=${apiVersion}`

const authKey = request.headers.get('Authorization');
if (!authKey) {
return new Response("Not allowed", {
Expand Down Expand Up @@ -59,6 +65,16 @@ function sleep(ms) {
return new Promise(resolve => setTimeout(resolve, ms));
}

function getModelMapper(model) {
if (model === "gpt-3.5-turbo") {
return { resourceName: resourceNameGPT35, deployName: deployNameGPT35 };
} else if (model === "gpt-4") {
return { resourceName: resourceNameGPT4, deployName: deployNameGPT4 };
} else {
throw new Error("Invalid model specified");
}
}

// support printer mode and add newline
async function stream(readable, writable) {
const reader = readable.getReader();
Expand Down Expand Up @@ -137,4 +153,4 @@ async function handleOPTIONS(request) {
'Access-Control-Allow-Headers': '*'
}
})
}
}