mediaUrl.ts
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function adminApiBase(): string {
const env = import.meta.env.VITE_API_BASE;
const envBase = typeof env === "string" ? env.trim().replace(/\/+$/, "") : "";
return envBase;
}
/**
* 管理后台下载/水印打包用：经后端 admin/v1/uploads/raw 拉取二进制，避免前端页与静态资源跨域时 fetch 被 CORS 拦截。
* 展示用仍用 {@link resolveAdminMediaUrl}（img 标签不受同源策略限制）。
*/
export function resolveAdminUploadBlobFetchUrl(displayUrl: string): string {
const raw = typeof displayUrl === "string" ? displayUrl.trim() : "";
if (!raw) return "";
let path = "";
try {
if (raw.startsWith("http://") || raw.startsWith("https://")) {
path = new URL(raw).pathname;
} else if (raw.startsWith("/uploads/")) {
path = raw.split("?")[0] ?? raw;
}
} catch {
return raw;
}
if (!path.startsWith("/uploads/")) {
return raw;
}
const base = adminApiBase();
if (!base) {
return raw;
}
return `${base}/admin/v1/uploads/raw?path=${encodeURIComponent(path)}`;
}
/**
* 管理后台展示用：将 /uploads/... 转为浏览器可请求的绝对地址。
* 未配置 VITE_API_BASE 时使用当前页面 origin（开发环境由 Vite 代理 /uploads）。
*/
export function resolveAdminMediaUrl(path: string | null | undefined): string {
const raw = typeof path === "string" ? path.trim() : "";
if (!raw) return "";
if (raw.startsWith("blob:") || raw.startsWith("data:")) {
return "";
}
if (raw.startsWith("http://") || raw.startsWith("https://")) {
return raw;
}
const uploads = raw.startsWith("/uploads/")
? raw
: raw.startsWith("uploads/")
? `/${raw}`
: "";
if (uploads) {
const envBase = adminApiBase();
const base =
envBase ||
(typeof window !== "undefined" && window.location?.origin
? window.location.origin.replace(/\/+$/, "")
: "");
return base ? `${base}${uploads}` : uploads;
}
if (raw.startsWith("/") && typeof window !== "undefined" && window.location?.origin) {
return `${window.location.origin.replace(/\/+$/, "")}${raw}`;
}
return raw;
}
/** 持久化字段：去掉浏览器临时地址，避免写入数据库 */
export function sanitizeAvatarForSave(path: string): string {
const t = path.trim();
if (!t || t.startsWith("blob:") || t.startsWith("data:")) {
return "";
}
return t;
}