76 lines
2.2 KiB
TypeScript
76 lines
2.2 KiB
TypeScript
import { NextRequest, NextResponse } from "next/server";
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export async function handle(
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req: NextRequest,
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{ params }: { params: { path: string[] } },
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) {
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console.log("[Proxy Route] params ", params);
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if (req.method === "OPTIONS") {
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return NextResponse.json({ body: "OK" }, { status: 200 });
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}
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// remove path params from searchParams
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req.nextUrl.searchParams.delete("path");
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req.nextUrl.searchParams.delete("provider");
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const subpath = params.path.join("/");
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const fetchUrl = `${req.headers.get(
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"x-base-url",
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)}/${subpath}?${req.nextUrl.searchParams.toString()}`;
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const skipHeaders = ["connection", "host", "origin", "referer", "cookie"];
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const headers = new Headers(
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Array.from(req.headers.entries()).filter((item) => {
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if (
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item[0].indexOf("x-") > -1 ||
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item[0].indexOf("sec-") > -1 ||
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skipHeaders.includes(item[0])
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) {
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return false;
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}
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return true;
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}),
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);
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const controller = new AbortController();
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const fetchOptions: RequestInit = {
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headers,
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method: req.method,
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body: req.body,
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// to fix #2485: https://stackoverflow.com/questions/55920957/cloudflare-worker-typeerror-one-time-use-body
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redirect: "manual",
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// @ts-ignore
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duplex: "half",
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signal: controller.signal,
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};
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const timeoutId = setTimeout(
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() => {
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controller.abort();
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},
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10 * 60 * 1000,
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);
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try {
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const res = await fetch(fetchUrl, fetchOptions);
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// to prevent browser prompt for credentials
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const newHeaders = new Headers(res.headers);
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newHeaders.delete("www-authenticate");
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// to disable nginx buffering
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newHeaders.set("X-Accel-Buffering", "no");
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// The latest version of the OpenAI API forced the content-encoding to be "br" in json response
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// So if the streaming is disabled, we need to remove the content-encoding header
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// Because Vercel uses gzip to compress the response, if we don't remove the content-encoding header
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// The browser will try to decode the response with brotli and fail
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newHeaders.delete("content-encoding");
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return new Response(res.body, {
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status: res.status,
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statusText: res.statusText,
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headers: newHeaders,
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});
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} finally {
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clearTimeout(timeoutId);
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}
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}
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