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Sanitize sync backup filenames for remote upload

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This commit is contained in:
Hao19911125
2026-04-02 22:15:01 +08:00
parent 2d9718ddc6
commit 5a5f495536
2 changed files with 78 additions and 10 deletions
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66
bme-sync.js
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@@ -1,5 +1,6 @@
const BME_SYNC_FILE_PREFIX = "ST-BME_sync_";
const BME_SYNC_FILE_SUFFIX = ".json";
const BME_SYNC_FILENAME_MAX_LENGTH = 180;
export const BME_SYNC_DEVICE_ID_KEY = "st_bme_sync_device_id_v1";
export const BME_SYNC_UPLOAD_DEBOUNCE_MS = 2500;
@@ -23,6 +24,54 @@ function normalizeChatId(chatId) {
return String(chatId ?? "").trim();
}
function createStableFilenameHash(input = "") {
let hash = 2166136261;
const normalized = String(input ?? "");
for (let index = 0; index < normalized.length; index++) {
hash ^= normalized.charCodeAt(index);
hash = Math.imul(hash, 16777619);
}
return (hash >>> 0).toString(36);
}
function normalizeRemoteFilenameCandidate(fileName, fallbackValue = "ST-BME_sync_unknown.json") {
const raw = String(fileName ?? "");
const normalized = typeof raw.normalize === "function" ? raw.normalize("NFKD") : raw;
const sanitized = normalized
.replace(/[\u0300-\u036f]/g, "")
.replace(/[^A-Za-z0-9._~-]+/g, "_")
.replace(/_+/g, "_")
.replace(/^\.+/g, "")
.slice(0, BME_SYNC_FILENAME_MAX_LENGTH)
.trim();
return sanitized || fallbackValue;
}
function buildSyncFilename(chatId) {
const normalizedChatId = normalizeChatId(chatId);
const legacyName = `${BME_SYNC_FILE_PREFIX}${normalizedChatId}${BME_SYNC_FILE_SUFFIX}`;
if (
normalizedChatId
&& /^[A-Za-z0-9._~-]+$/.test(normalizedChatId)
&& legacyName.length <= BME_SYNC_FILENAME_MAX_LENGTH
) {
return legacyName;
}
const hash = createStableFilenameHash(normalizedChatId || "unknown");
const rawSlug = normalizeRemoteFilenameCandidate(normalizedChatId, "");
const suffixPart = `~${hash}${BME_SYNC_FILE_SUFFIX}`;
const maxSlugLength = Math.max(
0,
BME_SYNC_FILENAME_MAX_LENGTH - BME_SYNC_FILE_PREFIX.length - suffixPart.length,
);
const safeSlug = rawSlug.slice(0, maxSlugLength).replace(/^[_~.-]+|[_~.-]+$/g, "");
const core = safeSlug
? `${BME_SYNC_FILE_PREFIX}${safeSlug}~${hash}`
: `${BME_SYNC_FILE_PREFIX}${hash}`;
return `${core}${BME_SYNC_FILE_SUFFIX}`;
}
function normalizeRevision(value) {
const parsed = Number(value);
if (!Number.isFinite(parsed) || parsed < 0) return 0;
@@ -856,13 +905,10 @@ async function invokeSyncAppliedHook(options = {}, payload = {}) {
}
async function sanitizeFilename(fileName, options = {}) {
const fallbackSanitized = String(fileName || "")
.replace(/[<>:"/\\|?*\x00-\x1F]/g, "_")
.replace(/\s+/g, "_")
.replace(/^\.+/g, "")
.slice(0, 180);
const finalFallback = fallbackSanitized || "ST-BME_sync_unknown.json";
const finalFallback = normalizeRemoteFilenameCandidate(
fileName,
"ST-BME_sync_unknown.json",
);
if (options.disableRemoteSanitize) {
return finalFallback;
@@ -885,7 +931,7 @@ async function sanitizeFilename(fileName, options = {}) {
const payload = await response.json().catch(() => null);
const sanitized = String(payload?.fileName || "").trim();
return sanitized || finalFallback;
return normalizeRemoteFilenameCandidate(sanitized, finalFallback);
} catch {
return finalFallback;
}
@@ -901,9 +947,9 @@ async function resolveSyncFilename(chatId, options = {}) {
return sanitizedFilenameByChatId.get(normalizedChatId);
}
const rawFileName = `${BME_SYNC_FILE_PREFIX}${normalizedChatId}${BME_SYNC_FILE_SUFFIX}`;
const rawFileName = buildSyncFilename(normalizedChatId);
const sanitized = await sanitizeFilename(rawFileName, options);
const finalName = sanitized || rawFileName;
const finalName = normalizeRemoteFilenameCandidate(sanitized, rawFileName);
sanitizedFilenameByChatId.set(normalizedChatId, finalName);
return finalName;
}