[fix] rename BASE to ORIGIN and fix config handling

packages/adapter-node/README.md

@@ -20,10 +20,10 @@ export default {
 				path: 'SOCKET_PATH',
 				host: 'HOST',
 				port: 'PORT',
-				base: undefined,
+				origin: 'ORIGIN',
 				headers: {
-					protocol: undefined,
-					host: 'host'
+					protocol: 'PROTOCOL_HEADER',
+					host: 'HOST_HEADER'
 				}
 			}
 		})
@@ -49,13 +49,13 @@ By default, the server will accept connections on `0.0.0.0` using port 3000. The
 HOST=127.0.0.1 PORT=4000 node build
 ```
 
-HTTP doesn't give SvelteKit a reliable way to know the URL that is currently being requested. The simplest way to tell SvelteKit where the app is being served is to set the `BASE` environment variable:
+HTTP doesn't give SvelteKit a reliable way to know the URL that is currently being requested. The simplest way to tell SvelteKit where the app is being served is to set the `ORIGIN` environment variable:
 
 ```
-BASE=https://my.site node build
+ORIGIN=https://my.site node build
 ```
 
-With this, a request for the `/stuff` pathname will correctly resolve to `https://my.site/stuff`. Alternatively, you can specify headers that tell SvelteKit about the request protocol and host, from which it can construct the base URL:
+With this, a request for the `/stuff` pathname will correctly resolve to `https://my.site/stuff`. Alternatively, you can specify headers that tell SvelteKit about the request protocol and host, from which it can construct the origin URL:
 
 ```
 PROTOCOL_HEADER=x-forwarded-proto HOST_HEADER=x-forwarded-host node build
@@ -69,7 +69,7 @@ All of these environment variables can be changed, if necessary, using the `env`
 env: {
 	host: 'MY_HOST_VARIABLE',
 	port: 'MY_PORT_VARIABLE',
-	base: 'MY_BASEURL',
+	origin: 'MY_ORIGINURL',
 	headers: {
 		protocol: 'MY_PROTOCOL_HEADER',
 		host: 'MY_HOST_HEADER'
@@ -80,7 +80,7 @@ env: {
 ```
 MY_HOST_VARIABLE=127.0.0.1 \
 MY_PORT_VARIABLE=4000 \
-MY_BASEURL=https://my.site \
+MY_ORIGINURL=https://my.site \
 node build
 ```
 

packages/adapter-node/index.d.ts

@@ -7,7 +7,7 @@ interface AdapterOptions {
 		path?: string;
 		host?: string;
 		port?: string;
-		base?: string;
+		origin?: string;
 		headers?: {
 			protocol?: string;
 			host?: string;

packages/adapter-node/index.js

@@ -17,11 +17,11 @@ export default function ({
 		path: path_env = 'SOCKET_PATH',
 		host: host_env = 'HOST',
 		port: port_env = 'PORT',
-		base: base_env,
+		origin: origin_env = 'ORIGIN',
 		headers: {
 			protocol: protocol_header_env = 'PROTOCOL_HEADER',
 			host: host_header_env = 'HOST_HEADER'
-		}
+		} = {}
 	} = {}
 } = {}) {
 	return {
@@ -54,7 +54,7 @@ export default function ({
 					PATH_ENV: JSON.stringify(path_env),
 					HOST_ENV: JSON.stringify(host_env),
 					PORT_ENV: JSON.stringify(port_env),
-					BASE: base_env ? `process.env[${JSON.stringify(base_env)}]` : 'undefined',
+					ORIGIN_ENV: origin_env ? `process.env[${JSON.stringify(origin_env)}]` : 'undefined',
 					PROTOCOL_HEADER: JSON.stringify(protocol_header_env),
 					HOST_HEADER: JSON.stringify(host_header_env)
 				}

packages/adapter-node/src/handler.js

@@ -7,10 +7,10 @@ import { getRequest, setResponse } from '@sveltejs/kit/node';
 import { App } from 'APP';
 import { manifest } from 'MANIFEST';
 
-/* global BASE_ENV, PROTOCOL_HEADER, HOST_HEADER */
+/* global ORIGIN_ENV, PROTOCOL_HEADER, HOST_HEADER */
 
 const app = new App(manifest);
-const base = BASE_ENV && process.env[BASE_ENV];
+const origin = ORIGIN_ENV && process.env[ORIGIN_ENV];
 const protocol_header = PROTOCOL_HEADER && process.env[PROTOCOL_HEADER];
 const host_header = (HOST_HEADER && process.env[HOST_HEADER]) || 'host';
 
@@ -39,7 +39,7 @@ const ssr = async (req, res) => {
 	let request;
 
 	try {
-		request = await getRequest(base || get_base(req.headers), req);
+		request = await getRequest(origin || get_origin(req.headers), req);
 	} catch (err) {
 		res.statusCode = err.status || 400;
 		return res.end(err.reason || 'Invalid request body');
@@ -68,7 +68,7 @@ function sequence(handlers) {
  * @param {import('http').IncomingHttpHeaders} headers
  * @returns
  */
-function get_base(headers) {
+function get_origin(headers) {
 	const protocol = (protocol_header && headers[protocol_header]) || 'https';
 	const host = headers[host_header];
 	return `${protocol}://${host}`;

packages/adapter-node/src/types.d.ts

@@ -2,7 +2,7 @@ declare global {
 	const PATH_ENV: string;
 	const HOST_ENV: string;
 	const PORT_ENV: string;
-	const BASE_ENV: string;
+	const ORIGIN_ENV: string;
 
 	const PROTOCOL_HEADER: string;
 	const HOST_HEADER: string;