add hw2

node_modules/get-uri/dist/ftp.js

@@ -0,0 +1,93 @@
+"use strict";
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.ftp = void 0;
+const basic_ftp_1 = require("basic-ftp");
+const stream_1 = require("stream");
+const path_1 = require("path");
+const debug_1 = __importDefault(require("debug"));
+const notfound_1 = __importDefault(require("./notfound"));
+const notmodified_1 = __importDefault(require("./notmodified"));
+const debug = (0, debug_1.default)('get-uri:ftp');
+/**
+ * Returns a Readable stream from an "ftp:" URI.
+ */
+const ftp = async (url, opts = {}) => {
+    const { cache } = opts;
+    const filepath = decodeURIComponent(url.pathname);
+    let lastModified;
+    if (!filepath) {
+        throw new TypeError('No "pathname"!');
+    }
+    const client = new basic_ftp_1.Client();
+    try {
+        const host = url.hostname || url.host || 'localhost';
+        const port = parseInt(url.port || '0', 10) || 21;
+        const user = url.username
+            ? decodeURIComponent(url.username)
+            : undefined;
+        const password = url.password
+            ? decodeURIComponent(url.password)
+            : undefined;
+        await client.access({
+            host,
+            port,
+            user,
+            password,
+            ...opts,
+        });
+        // first we have to figure out the Last Modified date.
+        // try the MDTM command first, which is an optional extension command.
+        try {
+            lastModified = await client.lastMod(filepath);
+        }
+        catch (err) {
+            // handle the "file not found" error code
+            if (err.code === 550) {
+                throw new notfound_1.default();
+            }
+        }
+        if (!lastModified) {
+            // Try to get the last modified date via the LIST command (uses
+            // more bandwidth, but is more compatible with older FTP servers
+            const list = await client.list((0, path_1.dirname)(filepath));
+            // attempt to find the "entry" with a matching "name"
+            const name = (0, path_1.basename)(filepath);
+            const entry = list.find((e) => e.name === name);
+            if (entry) {
+                lastModified = entry.modifiedAt;
+            }
+        }
+        if (lastModified) {
+            if (isNotModified()) {
+                throw new notmodified_1.default();
+            }
+        }
+        else {
+            throw new notfound_1.default();
+        }
+        const stream = new stream_1.PassThrough();
+        const rs = stream;
+        client.downloadTo(stream, filepath).then((result) => {
+            debug(result.message);
+            client.close();
+        });
+        rs.lastModified = lastModified;
+        return rs;
+    }
+    catch (err) {
+        client.close();
+        throw err;
+    }
+    // called when `lastModified` is set, and a "cache" stream was provided
+    function isNotModified() {
+        if (cache?.lastModified && lastModified) {
+            return +cache.lastModified === +lastModified;
+        }
+        return false;
+    }
+};
+exports.ftp = ftp;
+//# sourceMappingURL=ftp.js.map