Update main.js

main.js

@@ -2,15 +2,30 @@ const http = require('http');
 const puppeteer = require('puppeteer');
 const urlModule = require('url');
 
+// 用于存储浏览器实例，避免每次请求都重新启动浏览器
+let browser;
+
+const initBrowser = async () => {
+    browser = await puppeteer.launch({
+                headless: true,
+                args: ["--no-sandbox"],
+                executablePath: '/app/chrome/chrome-linux64/chrome'
+            });
+};
+
+initBrowser();
+let number = 0
+
 const server = http.createServer(async (req, res) => {
     const parsedUrl = urlModule.parse(req.url, true); // 第二个参数为true表示解析查询参数
     const pathname = parsedUrl.pathname;
     console.log(pathname)
     const query = parsedUrl.query;
     console.log(query)
+    console.log(number)
     if (pathname === '/screenshot' && req.method.toUpperCase() === 'GET') {
         const targetUrl = query.url;
-      console.log(targetUrl)
+        console.log(targetUrl)
         if (!targetUrl) {
             res.statusCode = 400;
             res.end('Missing url parameter');
@@ -18,20 +33,18 @@ const server = http.createServer(async (req, res) => {
         }
 
         try {
-            // 启动浏览器
-            const browser = await puppeteer.launch({
-                headless: true,
-                args: ["--no-sandbox"],
-                executablePath: '/app/chrome/chrome-linux64/chrome'
-            });
+            if (!browser) {
+                await initBrowser();
+            }
             try {
                 const page = await browser.newPage();
                 // 这里确保传入完整协议的网址，比如 http:// 或 https:// 开头的
                 await page.goto(targetUrl);
                 const screenshotBuffer = await page.screenshot();
-                await browser.close();
+                await page.close();
 
                 res.statusCode = 200;
+                number = number++
                 res.setHeader('Content-Type', 'image/png');
                 res.end(screenshotBuffer);
             } catch (pageError) {