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管理端可配类型/体积；上传改流式避免整文件进内存；发帖先选再传并拦截未上传提交；提高 Next proxy 体积上限。 Co-authored-by: Cursor <cursoragent@cursor.com>
59 lines
1.7 KiB
TypeScript
59 lines
1.7 KiB
TypeScript
/** 帖子附件客户端校验（与后端 setting / fileallow 对齐；安全边界仍在 Go） */
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export const FILE_MAX_MB_DEFAULT = 20;
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export const FILE_MAX_COUNT_DEFAULT = 10;
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export function normalizeExt(nameOrExt: string): string {
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const base = nameOrExt.includes("/")
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? nameOrExt.split(/[/\\]/).pop() || ""
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: nameOrExt;
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const i = base.lastIndexOf(".");
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const ext = (i >= 0 ? base.slice(i + 1) : base).trim().toLowerCase();
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return ext.replace(/[^a-z0-9]/g, "").slice(0, 16);
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}
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export function buildAcceptAttr(exts: string[], limit: boolean): string | undefined {
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if (!limit) return undefined;
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if (!exts.length) return undefined;
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return exts.map((e) => `.${e}`).join(",");
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}
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export function isAllowedPostFileName(
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name: string,
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opts: { limit: boolean; exts: string[] }
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): boolean {
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if (!opts.limit) return true;
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const ext = normalizeExt(name);
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if (!ext) return false;
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return opts.exts.includes(ext);
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}
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export function formatMB(n: number): string {
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return `${n}MB`;
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}
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export type PostFileRejectReason = "size" | "type" | "count" | null;
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export function rejectPostFile(
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file: File,
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opts: {
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limit: boolean;
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exts: string[];
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maxMB: number;
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maxCount: number;
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currentCount: number;
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}
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): { reason: PostFileRejectReason; message?: string } {
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if (opts.currentCount >= opts.maxCount) {
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return { reason: "count", message: `最多 ${opts.maxCount} 个附件` };
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}
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const maxBytes = opts.maxMB * 1024 * 1024;
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if (file.size > maxBytes) {
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return { reason: "size", message: `附件不能超过 ${opts.maxMB}MB` };
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}
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if (!isAllowedPostFileName(file.name, opts)) {
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return { reason: "type", message: "不支持该附件格式" };
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}
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return { reason: null };
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}
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