feat: DSL 磁力聚合 — 搜索/解析/预览/投递 + cilisousuo 源 + 中英双语 + Docker 部署

server/utils/http.ts

@@ -0,0 +1,54 @@
+import { ProxyAgent, fetch as undiciFetch, type RequestInit } from 'undici'
+
+const agentCache = new Map<string, ProxyAgent>()
+
+export function getProxyAgent(proxy?: string | null): ProxyAgent | undefined {
+  const uri = (proxy || '').trim()
+  if (!uri) return undefined
+  let agent = agentCache.get(uri)
+  if (!agent) {
+    agent = new ProxyAgent(uri)
+    agentCache.set(uri, agent)
+  }
+  return agent
+}
+
+export interface HttpOptions extends RequestInit {
+  /** 走 HTTP/HTTPS 代理，例如 http://127.0.0.1:7890 */
+  proxy?: string | null
+  timeoutMs?: number
+}
+
+/** 统一出口：带超时 + 可选代理的 fetch */
+export async function httpFetch(url: string, options: HttpOptions = {}) {
+  const { proxy, timeoutMs = 12000, ...init } = options
+  const controller = new AbortController()
+  const timer = setTimeout(() => controller.abort(), timeoutMs)
+  try {
+    return await undiciFetch(url, {
+      ...init,
+      dispatcher: getProxyAgent(proxy),
+      signal: controller.signal
+    })
+  } catch (err) {
+    if (controller.signal.aborted) throw new Error(`请求超时（${timeoutMs}ms）：${url}`)
+    throw err
+  } finally {
+    clearTimeout(timer)
+  }
+}
+
+export async function httpText(url: string, options: HttpOptions = {}): Promise<string> {
+  const res = await httpFetch(url, options)
+  if (!res.ok) throw new Error(`HTTP ${res.status} ${res.statusText}`)
+  return await res.text()
+}
+
+export async function httpJson<T = unknown>(url: string, options: HttpOptions = {}): Promise<T> {
+  const res = await httpFetch(url, options)
+  if (!res.ok) throw new Error(`HTTP ${res.status} ${res.statusText}`)
+  return (await res.json()) as T
+}
+
+export const DEFAULT_UA =
+  'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36'