Push asset server module

asset_server/index.js

@@ -0,0 +1,52 @@
+const express = require('express')
+const app = express()
+const fs = require('fs');
+var http = require('http');
+
+const ip = '0.0.0.0';
+const port = 8887;
+//https://lovelive-schoolidolfestival2-album.akamaized.net
+app.use(function (req, res, next) {
+	console.log(req.method, ":", req.url);
+	next();
+})
+function createDirFromFile(path) {
+    fs.mkdirSync(require('path').dirname(path), { recursive: true });
+}
+
+app.get('/*', function (req, res) {
+    const expectedPath = __dirname + "/resources"+req.url;
+    createDirFromFile(expectedPath);
+    let downloading = [];
+    if (fs.existsSync(expectedPath)) {
+        const fileStream = fs.createReadStream(expectedPath);
+        res.writeHead(200);
+        fileStream.pipe(res);
+    } else {
+        let url = (!req.url.toLowerCase().startsWith("android") ? "https://img-sif2.lovelive-sif2.com" : "https://album-sif2.lovelive-sif2.com") + req.url;
+        const request = require('https').get(url, function(response) {
+           response.pipe(res);
+        });
+        if (downloading.includes(req.url)) return;
+        require('https').get(url, function(response) {
+            console.log("Downloading " + req.url);
+            downloading.push(req.url);
+            const file = fs.createWriteStream(expectedPath);
+            response.pipe(file);
+
+            // after download completed close filestream
+            file.on("finish", () => {
+               file.close();
+               console.log("Download Completed " + req.url);
+            });
+        })
+    }
+})
+
+var httpsServer = http.createServer(app);
+
+
+httpsServer.listen(port, ip, () => {
+	let url = 'http://' + ip + ':' + port
+	console.log('Server is listening at', url)
+})