add hw2

node_modules/get-uri/dist/file.js

@@ -0,0 +1,57 @@
+"use strict";
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.file = void 0;
+const debug_1 = __importDefault(require("debug"));
+const fs_1 = require("fs");
+const notfound_1 = __importDefault(require("./notfound"));
+const notmodified_1 = __importDefault(require("./notmodified"));
+const url_1 = require("url");
+const debug = (0, debug_1.default)('get-uri:file');
+/**
+ * Returns a `fs.ReadStream` instance from a "file:" URI.
+ */
+const file = async ({ href: uri }, opts = {}) => {
+    const { cache, flags = 'r', mode = 438, // =0666
+     } = opts;
+    try {
+        // Convert URI → Path
+        const filepath = (0, url_1.fileURLToPath)(uri);
+        debug('Normalized pathname: %o', filepath);
+        // `open()` first to get a file descriptor and ensure that the file
+        // exists.
+        const fdHandle = await fs_1.promises.open(filepath, flags, mode);
+        // extract the numeric file descriptor
+        const fd = fdHandle.fd;
+        // store the stat object for the cache.
+        const stat = await fdHandle.stat();
+        // if a `cache` was provided, check if the file has not been modified
+        if (cache && cache.stat && stat && isNotModified(cache.stat, stat)) {
+            await fdHandle.close();
+            throw new notmodified_1.default();
+        }
+        // `fs.ReadStream` takes care of calling `fs.close()` on the
+        // fd after it's done reading
+        const rs = (0, fs_1.createReadStream)(filepath, {
+            autoClose: true,
+            ...opts,
+            fd,
+        });
+        rs.stat = stat;
+        return rs;
+    }
+    catch (err) {
+        if (err.code === 'ENOENT') {
+            throw new notfound_1.default();
+        }
+        throw err;
+    }
+};
+exports.file = file;
+// returns `true` if the `mtime` of the 2 stat objects are equal
+function isNotModified(prev, curr) {
+    return +prev.mtime === +curr.mtime;
+}
+//# sourceMappingURL=file.js.map