diff --git a/utils.ts b/utils.ts
index 2dce152..c173179 100644
--- a/utils.ts
+++ b/utils.ts
@@ -334,10 +334,26 @@ export function compareNum(num1: number | bigint, num2: number | bigint) {
 }
 
 const HASH_PATTERN = /^\/h\/([0-9a-f]+)/;
+const FHASH_PATTERN = /([0-9a-f]{40})-(\d+)-(\d+)-(\d+)-([^\/]+)/g;
 
 export function getHashFromUrl(url: string | URL) {
     const u = typeof url === "string" ? new URL(url) : url;
     const m = u.pathname.match(HASH_PATTERN);
     if (m) return m[1];
+    if (u.pathname.startsWith("/om/")) {
+        const ma = Array.from(u.pathname.matchAll(FHASH_PATTERN));
+        const comps = u.pathname.split("/");
+        if (ma.length && comps.length > 3) {
+            const width = comps[comps.length - 3];
+            if (width == "0") {
+                return ma[0][1];
+            }
+            for (const f of ma) {
+                if (f[3] == width) {
+                    return f[1];
+                }
+            }
+        }
+    }
     throw Error(`URL ${url} not contains hash info.`);
 }
diff --git a/utils_test.ts b/utils_test.ts
index 1387901..075e3f9 100644
--- a/utils_test.ts
+++ b/utils_test.ts
@@ -9,6 +9,7 @@ import {
     calFileSha1,
     compareNum,
     filterFilename,
+    getHashFromUrl,
     map,
     parseBigInt,
     promiseState,
@@ -200,3 +201,30 @@ Deno.test("parseBigInt_test", () => {
     assertEquals(parseBigInt("--9007199254740992"), NaN);
     assertEquals(parseBigInt("--3"), NaN);
 });
+
+Deno.test("getHashFromUrl_test", () => {
+    assertEquals(
+        getHashFromUrl(
+            "https://tgozcdr.gmhufzljgpgr.hath.network/h/5ad98a65fedb4bbe374200127bf59122d790b01a-561706-2400-3455-jpg/keystamp=1717653000-d7f10a5a37;fileindex=148307765;xres=2400/3.jpg",
+        ),
+        "5ad98a65fedb4bbe374200127bf59122d790b01a",
+    );
+    assertEquals(
+        getHashFromUrl(
+            "https://shioxowwjqzzmcmcjtcc.hath.network/om/148307800/fdf168f74a048b4d8ac00fd8679ebd37495d4225-12779336-5709-4063-png/eda2e519f8a8d08af91c9e69aca958bad4287fc7-442362-2400-1708-jpg/2400/jxd25rgrogit4j1d6bp/13_14.jpg",
+        ),
+        "eda2e519f8a8d08af91c9e69aca958bad4287fc7",
+    );
+    assertEquals(
+        getHashFromUrl(
+            "https://wodmrfmkcovmstjztpdj.hath.network/om/148307765/b17d7a49b90ec7f8e586dd9847d22027b0d56d6b-5720430-2822-4063-png/x/0/erpgfojcsyhu9v1d6b2/3.png",
+        ),
+        "b17d7a49b90ec7f8e586dd9847d22027b0d56d6b",
+    );
+    assertEquals(
+        getHashFromUrl(
+            "https://asmrsqqftvbbqqaocggo.hath.network/om/98603353/1f48eb617ea10c4b48ef0485d43f339985119d7f-13101261-4893-3446-png/4038f0c078b59736aeaa5b1ce38a44b701238363-330283-2400-1690-jpg/2400/g101vh47s3q5al1d6ax/18.jpg",
+        ),
+        "4038f0c078b59736aeaa5b1ce38a44b701238363",
+    );
+});