move llms to core package

packages/core/src/utils/request.ts

@@ -0,0 +1,57 @@
+import { ProxyAgent } from "undici";
+import { UnifiedChatRequest } from "../types/llm";
+
+export function sendUnifiedRequest(
+  url: URL | string,
+  request: UnifiedChatRequest,
+  config: any,
+  context: any,
+  logger?: any
+): Promise<Response> {
+  const headers = new Headers({
+    "Content-Type": "application/json",
+  });
+  if (config.headers) {
+    Object.entries(config.headers).forEach(([key, value]) => {
+      if (value) {
+        headers.set(key, value as string);
+      }
+    });
+  }
+  let combinedSignal: AbortSignal;
+  const timeoutSignal = AbortSignal.timeout(config.TIMEOUT ?? 60 * 1000 * 60);
+
+  if (config.signal) {
+    const controller = new AbortController();
+    const abortHandler = () => controller.abort();
+    config.signal.addEventListener("abort", abortHandler);
+    timeoutSignal.addEventListener("abort", abortHandler);
+    combinedSignal = controller.signal;
+  } else {
+    combinedSignal = timeoutSignal;
+  }
+
+  const fetchOptions: RequestInit = {
+    method: "POST",
+    headers: headers,
+    body: JSON.stringify(request),
+    signal: combinedSignal,
+  };
+
+  if (config.httpsProxy) {
+    (fetchOptions as any).dispatcher = new ProxyAgent(
+      new URL(config.httpsProxy).toString()
+    );
+  }
+  logger?.debug(
+    {
+      reqId: context.req.id,
+      request: fetchOptions,
+      headers: Object.fromEntries(headers.entries()),
+      requestUrl: typeof url === "string" ? url : url.toString(),
+      useProxy: config.httpsProxy,
+    },
+    "final request"
+  );
+  return fetch(typeof url === "string" ? url : url.toString(), fetchOptions);
+}