实现数据隔离功能：添加会话管理，确保每个设备看到独立的数据；添加二维码生成功能

1 month ago · 030df923c5
7 changed files with 436 additions and 13 deletions
--- a/certificate.html
+++ b/certificate.html
@ -472,10 +472,22 @@
    // 签名画布相关变量
    let canvas, ctx, isDrawing = false;
    
+    // 获取或创建会话标识
+    function getSessionId() {
+      let sessionId = localStorage.getItem('certificateSessionId');
+      if (!sessionId) {
+        // 生成唯一会话标识
+        sessionId = 'session_' + Date.now() + '_' + Math.random().toString(36).substr(2, 9);
+        localStorage.setItem('certificateSessionId', sessionId);
+      }
+      return sessionId;
+    }
+    
    // 从服务器加载最新的合格证信息
    function loadCertificate() {
-      // 直接从服务器获取最新的合格证信息
-      fetch('/getLatestCertificate')
+      const sessionId = getSessionId();
+      // 直接从服务器获取最新的合格证信息，包含会话标识
+      fetch(`/getLatestCertificate?sessionId=${encodeURIComponent(sessionId)}`)
        .then(response => response.json())
        .then(data => {
          if (data.success && data.certificate) {
@ -690,6 +702,10 @@
        urlEncodedData.append(key, value);
      }
      
+      // 添加会话标识
+      const sessionId = getSessionId();
+      urlEncodedData.append('sessionId', sessionId);
+      
      // 发送数据到服务器
      fetch('/submit', {
        method: 'POST',
--- a/generate-qr.js
+++ b/generate-qr.js
@ -0,0 +1,45 @@
+const QRCode = require('qrcode');
+const fs = require('fs');
+const path = require('path');
+
+// 网页 URL
+const url = 'http://8.137.125.67:3008/';
+
+// 生成二维码并保存为图片
+async function generateQRCode() {
+  try {
+    console.log('正在生成二维码...');
+    
+    // 生成二维码数据
+    const qrData = await QRCode.toDataURL(url, {
+      width: 300,
+      margin: 1,
+      color: {
+        dark: '#000000',
+        light: '#FFFFFF'
+      }
+    });
+    
+    // 提取 base64 数据
+    const base64Data = qrData.replace(/^data:image\/png;base64,/, '');
+    const buffer = Buffer.from(base64Data, 'base64');
+    
+    // 保存为图片文件
+    const qrPath = path.join(__dirname, 'qrcode.png');
+    fs.writeFileSync(qrPath, buffer);
+    
+    console.log(`二维码生成成功！保存路径：${qrPath}`);
+    console.log(`二维码包含的 URL：${url}`);
+    console.log('请使用微信等扫描工具扫描此二维码进入程序。');
+    
+  } catch (error) {
+    console.error('生成二维码失败:', error.message);
+  }
+}
+
+// 执行生成二维码
+if (require.main === module) {
+  generateQRCode();
+}
+
+module.exports = { generateQRCode };
--- a/package-lock.json
+++ b/package-lock.json
@ -12,7 +12,8 @@
        "ali-oss": "^6.23.0",
        "ejs": "^4.0.1",
        "express": "^5.2.1",
-        "mysql2": "^3.16.2"
+        "mysql2": "^3.16.2",
+        "qrcode": "^1.5.4"
      }
    },
    "node_modules/accepts": {
@ -94,6 +95,30 @@
        "url": "https://github.com/sponsors/sindresorhus"
      }
    },
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+      "license": "MIT",
+      "engines": {
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+      }
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+    "node_modules/ansi-styles": {
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+      "license": "MIT",
+      "dependencies": {
+        "color-convert": "^2.0.1"
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+      "funding": {
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@ -204,6 +229,44 @@
        "url": "https://github.com/sponsors/ljharb"
      }
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+      "license": "MIT",
+      "engines": {
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+      "license": "ISC",
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+      "license": "MIT",
+      "dependencies": {
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+      "license": "MIT"
+    },
    "node_modules/content-disposition": {
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      "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-1.0.1.tgz",
@ -282,6 +345,15 @@
        }
      }
    },
+    "node_modules/decamelize": {
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+      "license": "MIT",
+      "engines": {
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@ -331,6 +403,12 @@
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+    "node_modules/dijkstrajs": {
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@ -366,6 +444,12 @@
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@ -523,6 +607,19 @@
        "url": "https://opencollective.com/express"
      }
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@ -571,6 +668,15 @@
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@ -725,6 +831,15 @@
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@ -1056,6 +1183,42 @@
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@ -1065,6 +1228,15 @@
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@ -1128,6 +1309,23 @@
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@ -1182,6 +1380,21 @@
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@ -1287,6 +1500,12 @@
        "url": "https://opencollective.com/express"
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@ -1414,6 +1633,32 @@
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@ -1574,6 +1819,12 @@
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@ -1586,6 +1837,20 @@
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      "version": "1.0.2",
      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
@ -1622,6 +1887,47 @@
      "engines": {
        "node": ">=0.4"
      }
+    },
+    "node_modules/y18n": {
+      "version": "4.0.3",
+      "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.3.tgz",
+      "integrity": "sha512-JKhqTOwSrqNA1NY5lSztJ1GrBiUodLMmIZuLiDaMRJ+itFd+ABVE8XBjOvIWL+rSqNDC74LCSFmlb/U4UZ4hJQ==",
+      "license": "ISC"
+    },
+    "node_modules/yargs": {
+      "version": "15.4.1",
+      "resolved": "https://registry.npmjs.org/yargs/-/yargs-15.4.1.tgz",
+      "integrity": "sha512-aePbxDmcYW++PaqBsJ+HYUFwCdv4LVvdnhBy78E57PIor8/OVvhMrADFFEDh8DHDFRv/O9i3lPhsENjO7QX0+A==",
+      "license": "MIT",
+      "dependencies": {
+        "cliui": "^6.0.0",
+        "decamelize": "^1.2.0",
+        "find-up": "^4.1.0",
+        "get-caller-file": "^2.0.1",
+        "require-directory": "^2.1.1",
+        "require-main-filename": "^2.0.0",
+        "set-blocking": "^2.0.0",
+        "string-width": "^4.2.0",
+        "which-module": "^2.0.0",
+        "y18n": "^4.0.0",
+        "yargs-parser": "^18.1.2"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/yargs-parser": {
+      "version": "18.1.3",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-18.1.3.tgz",
+      "integrity": "sha512-o50j0JeToy/4K6OZcaQmW6lyXXKhq7csREXcDwk2omFPJEwUNOVtJKvmDr9EI1fAJZUyZcRF7kxGBWmRXudrCQ==",
+      "license": "ISC",
+      "dependencies": {
+        "camelcase": "^5.0.0",
+        "decamelize": "^1.2.0"
+      },
+      "engines": {
+        "node": ">=6"
+      }
    }
  }
 }
--- a/package.json
+++ b/package.json
@ -13,6 +13,7 @@
    "ali-oss": "^6.23.0",
    "ejs": "^4.0.1",
    "express": "^5.2.1",
-    "mysql2": "^3.16.2"
+    "mysql2": "^3.16.2",
+    "qrcode": "^1.5.4"
  }
 }
--- a/qrcode.png
+++ b/qrcode.png
--- a/server.js
+++ b/server.js
@ -77,12 +77,25 @@ const server = http.createServer(async (req, res) => {
  }

  // 处理GET请求，获取最新的合格证信息
-  if (req.method === 'GET' && req.url === '/getLatestCertificate') {
+  if (req.method === 'GET' && req.url.startsWith('/getLatestCertificate')) {
    try {
-      // 从数据库获取最新的合格证信息
-      const [rows] = await pool.execute(
-        'SELECT company as subjectName, phoneNumber as contact, productName, grossWeight as weight, commitBasis as basis, origin, DATE_FORMAT(issueDate, "%Y-%m-%d") as date, signature FROM certificate ORDER BY id DESC LIMIT 1'
-      );
+      // 解析URL参数，获取sessionId
+      const urlParams = new URLSearchParams(req.url.split('?')[1] || '');
+      const sessionId = urlParams.get('sessionId');
+      
+      console.log('获取合格证信息，sessionId:', sessionId);
+      
+      // 从数据库获取对应会话的最新合格证信息
+      let query, params;
+      if (sessionId) {
+        query = 'SELECT company as subjectName, phoneNumber as contact, productName, grossWeight as weight, commitBasis as basis, origin, DATE_FORMAT(issueDate, "%Y-%m-%d") as date, signature FROM certificate WHERE sessionId = ? ORDER BY id DESC LIMIT 1';
+        params = [sessionId];
+      } else {
+        query = 'SELECT company as subjectName, phoneNumber as contact, productName, grossWeight as weight, commitBasis as basis, origin, DATE_FORMAT(issueDate, "%Y-%m-%d") as date, signature FROM certificate WHERE sessionId IS NULL ORDER BY id DESC LIMIT 1';
+        params = [];
+      }
+      
+      const [rows] = await pool.execute(query, params);
      
      const certificate = rows.length > 0 ? rows[0] : null;
      console.log('从数据库获取的最新合格证信息:', certificate);
@ -123,6 +136,8 @@ const server = http.createServer(async (req, res) => {
          // 使用当前时间作为开具日期，数据库连接已配置为北京时间
          const now = new Date();
          
+          const sessionId = formData.get('sessionId');
+          
          const certificate = {
            subjectName: formData.get('subjectName'),
            contact: formData.get('contact'),
@ -131,7 +146,8 @@ const server = http.createServer(async (req, res) => {
            basis: formData.get('basis'),
            origin: formData.get('origin'),
            date: now,
-            signature: formData.get('signature')
+            signature: formData.get('signature'),
+            sessionId: sessionId
          };
          
          console.log('接收到的表单数据:', {
@ -142,7 +158,8 @@ const server = http.createServer(async (req, res) => {
            basis: certificate.basis,
            origin: certificate.origin,
            date: certificate.date.toISOString(),
-            hasSignature: !!certificate.signature
+            hasSignature: !!certificate.signature,
+            sessionId: sessionId
          });
          
          // 处理手写签名，上传到OSS
@ -169,8 +186,8 @@ const server = http.createServer(async (req, res) => {
          
          // 插入数据到数据库
          await pool.execute(
-            'INSERT INTO certificate (company, phoneNumber, productName, grossWeight, commitBasis, origin, issueDate, signature) VALUES (?, ?, ?, ?, ?, ?, ?, ?)',
-            [certificate.subjectName, certificate.contact, certificate.productName, certificate.weight, certificate.basis, certificate.origin, certificate.date, signatureUrl]
+            'INSERT INTO certificate (company, phoneNumber, productName, grossWeight, commitBasis, origin, issueDate, signature, sessionId) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)',
+            [certificate.subjectName, certificate.contact, certificate.productName, certificate.weight, certificate.basis, certificate.origin, certificate.date, signatureUrl, certificate.sessionId]
          );
          
          console.log('数据插入数据库成功');
--- a/upload-qr.js
+++ b/upload-qr.js
@ -0,0 +1,38 @@
+const fs = require('fs');
+const path = require('path');
+const OssUploader = require('./oss-uploader');
+
+// 二维码图片路径
+const qrPath = path.join(__dirname, 'qrcode.png');
+
+// 上传二维码到 OSS
+async function uploadQRCode() {
+  try {
+    console.log('正在上传二维码到 OSS...');
+    
+    // 读取二维码图片文件
+    const buffer = fs.readFileSync(qrPath);
+    
+    // 生成文件名
+    const filename = 'certificate_qrcode.png';
+    
+    // 上传到 OSS
+    const qrUrl = await OssUploader.uploadBuffer(buffer, filename, 'certificate/qrcode', 'image');
+    
+    console.log(`二维码上传成功！OSS 地址：${qrUrl}`);
+    console.log('用户可以通过以下方式获取二维码：');
+    console.log('1. 直接使用本地生成的 qrcode.png 文件');
+    console.log('2. 通过 OSS 地址访问：', qrUrl);
+    console.log('3. 将 OSS 地址分享给需要的用户');
+    
+  } catch (error) {
+    console.error('上传二维码失败:', error.message);
+  }
+}
+
+// 执行上传
+if (require.main === module) {
+  uploadQRCode();
+}
+
+module.exports = { uploadQRCode };