initial commit

2026-05-13 14:20:41 +00:00
commit 6e178d2012
6022 changed files with 399872 additions and 0 deletions
@@ -0,0 +1,24 @@
+import { createReadStream } from "fs";
+import { HashCalculator } from "./HashCalculator";
+export const fileStreamHasher = (hashCtor, fileStream) => new Promise((resolve, reject) => {
+    if (!isReadStream(fileStream)) {
+        reject(new Error("Unable to calculate hash for non-file streams."));
+        return;
+    }
+    const fileStreamTee = createReadStream(fileStream.path, {
+        start: fileStream.start,
+        end: fileStream.end,
+    });
+    const hash = new hashCtor();
+    const hashCalculator = new HashCalculator(hash);
+    fileStreamTee.pipe(hashCalculator);
+    fileStreamTee.on("error", (err) => {
+        hashCalculator.end();
+        reject(err);
+    });
+    hashCalculator.on("error", reject);
+    hashCalculator.on("finish", function () {
+        hash.digest().then(resolve).catch(reject);
+    });
+});
+const isReadStream = (stream) => typeof stream.path === "string";