Initial commit

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/lib/api/config.ts

@@ -0,0 +1,36 @@
+export const DEFAULT_API_BASE_URL = 'http://172.104.181.99:21022';
+export const UPSTREAM_HOP_HEADER = 'x-91dj-upstream';
+
+export interface ApiRequestContext {
+  headers: Pick<Headers, 'get'>;
+  url?: string;
+}
+
+function configuredApiUrl(): string {
+  const environment = process.env.APP_ENV || (process.env.NODE_ENV === 'production' ? 'production' : 'development');
+  const fallback = environment === 'production' ? 'http://172.104.56.28:26125' : DEFAULT_API_BASE_URL;
+  return (process.env.UPSTREAM_API_URL ?? process.env.API_BASE_URL ?? fallback).trim();
+}
+
+export function usesCurrentApiOrigin(): boolean {
+  return configuredApiUrl() === 'current';
+}
+
+/** Resolve each visitor's origin at request time; never store a request host globally. */
+export function getApiBaseUrl(request?: ApiRequestContext): string {
+  const value = configuredApiUrl();
+  if (value === 'current') {
+    const incoming = request?.url ? new URL(request.url) : undefined;
+    const host = (request?.headers.get('host') || request?.headers.get('x-forwarded-host')?.split(',')[0] || incoming?.host || '').trim();
+    const protocol = (request?.headers.get('x-forwarded-proto')?.split(',')[0] || incoming?.protocol.replace(':', '') || 'https').trim();
+    if (!host || /[\s,/\\?#@]/.test(host) || !['http', 'https'].includes(protocol)) throw new Error('当前域名接口模式缺少有效的请求域名或协议');
+    const origin = new URL(protocol + '://' + host);
+    if (origin.username || origin.password || origin.pathname !== '/' || origin.search || origin.hash) throw new Error('当前域名接口地址无效');
+    return origin.origin;
+  }
+  try {
+    const url = new URL(value);
+    if (!['http:', 'https:'].includes(url.protocol) || url.username || url.password || url.search || url.hash) throw new Error('Invalid upstream');
+    return url.href.replace(/\/+$/, '');
+  } catch { throw new Error('UPSTREAM_API_URL 必须是有效的 HTTP(S) 接口地址'); }
+}