DeviceDriverMiddleware/standalone-test.html at master · 39499740/DeviceDriverMiddleware · GitHub

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<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>TWAIN中间件 - 独立测试页面</title>
    <style>
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            max-width: 800px;
            margin: 0 auto;
            padding: 20px;
            background-color: #f5f5f5;
        }

        .container {
            background-color: white;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            padding: 30px;
        }

        h1 {
            color: #333;
            text-align: center;
            margin-bottom: 30px;
        }

        .status-bar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px;
            border-radius: 5px;
            margin-bottom: 20px;
            font-weight: bold;
        }

        .status-bar.connected {
            background-color: #d4edda;
            color: #155724;
            border: 1px solid #c3e6cb;
        }

        .status-bar.disconnected {
            background-color: #f8d7da;
            color: #721c24;
            border: 1px solid #f5c6cb;
        }

        .button-group {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            margin-bottom: 20px;
        }

        .btn {
            padding: 10px 20px;
            border: none;
            border-radius: 5px;
            cursor: pointer;
            font-size: 14px;
            font-weight: bold;
            transition: all 0.3s ease;
        }

        .btn:disabled {
            opacity: 0.5;
            cursor: not-allowed;
        }

        .btn-primary {
            background-color: #007bff;
            color: white;
        }

        .btn-primary:hover:not(:disabled) {
            background-color: #0056b3;
        }

        .btn-success {
            background-color: #28a745;
            color: white;
        }

        .btn-success:hover:not(:disabled) {
            background-color: #1e7e34;
        }

        .log-container {
            background-color: #f8f9fa;
            border: 1px solid #dee2e6;
            border-radius: 5px;
            padding: 15px;
            height: 300px;
            overflow-y: auto;
            font-family: monospace;
            font-size: 12px;
            line-height: 1.4;
        }

        .log-entry {
            margin-bottom: 5px;
            padding: 2px 5px;
            border-radius: 3px;
        }

        .log-info {
            background-color: #e3f2fd;
            color: #1976d2;
        }

        .log-success {
            background-color: #e8f5e8;
            color: #2e7d32;
        }

        .log-error {
            background-color: #ffebee;
            color: #c62828;
        }

        .log-warning {
            background-color: #fff3e0;
            color: #f57c00;
        }

        .form-group {
            margin-bottom: 15px;
        }

        .form-group label {
            display: block;
            font-weight: bold;
            margin-bottom: 5px;
        }

        .form-group select,
        .form-group input {
            width: 100%;
            padding: 8px;
            border: 1px solid #ddd;
            border-radius: 4px;
            font-size: 14px;
        }
    </style>
</head>
<body>
    <div class="container">
        <h1>🖨️ TWAIN中间件 - 独立测试页面</h1>

        <div class="status-bar disconnected" id="statusBar">
            <span id="statusText">❌ 未连接</span>
            <span id="statusTime"></span>
        </div>

        <div class="button-group">
            <button class="btn btn-primary" id="connectBtn">🔗 连接中间件</button>
            <button class="btn btn-primary" id="disconnectBtn" disabled>🔌 断开连接</button>
            <button class="btn btn-success" id="getPrintersBtn" disabled>📋 获取打印机列表</button>
            <button class="btn btn-success" id="clearLogBtn">🗑️ 清空日志</button>
        </div>

        <div class="form-group">
            <label for="printerSelect">选择打印机:</label>
            <select id="printerSelect" disabled>
                <option value="">请先连接中间件</option>
            </select>
        </div>

        <div id="printerDetails"></div>

        <div class="log-container" id="logContainer"></div>
    </div>

    <script>
        /**
         * TWAIN扫描仪中间件 JavaScript SDK (内嵌版本)
         * 版本: 1.2.0
         */
        class TwainMiddlewareSDK {
            constructor(options = {}) {
                this.options = {
                    host: options.host || 'localhost',
                    port: options.port || 45677,
                    autoReconnect: options.autoReconnect || true,
                    reconnectInterval: options.reconnectInterval || 3000,
                    maxReconnectAttempts: options.maxReconnectAttempts || 3,
                    debug: options.debug || false
                };

                this.ws = null;
                this.isConnected = false;
                this.reconnectAttempts = 0;
                this.requestCallbacks = new Map();
                this.eventListeners = new Map();
                this.requestId = 0;

                // 初始化事件监听器映射
                this.eventListeners.set('connected', []);
                this.eventListeners.set('disconnected', []);
                this.eventListeners.set('error', []);
                this.eventListeners.set('printersUpdated', []);
            }

            /**
             * 连接到中间件服务
             */
            connect() {
                return new Promise((resolve, reject) => {
                    const wsUrl = `ws://${this.options.host}:${this.options.port}/twain`;
                    this.log('正在连接到:', wsUrl);

                    try {
                        this.ws = new WebSocket(wsUrl);

                        this.ws.onopen = () => {
                            this.isConnected = true;
                            this.reconnectAttempts = 0;
                            this.log('WebSocket连接已建立');
                            this.emit('connected');
                            resolve();
                        };

                        this.ws.onmessage = (event) => {
                            this.handleMessage(event.data);
                        };

                        this.ws.onclose = (event) => {
                            this.isConnected = false;
                            this.log('WebSocket连接已关闭:', event.code, event.reason);
                            this.emit('disconnected', { code: event.code, reason: event.reason });
                        };

                        this.ws.onerror = (error) => {
                            this.log('WebSocket错误:', error);
                            this.emit('error', error);
                            if (!this.isConnected) {
                                reject(error);
                            }
                        };

                    } catch (error) {
                        this.log('连接失败:', error);
                        reject(error);
                    }
                });
            }

            /**
             * 断开连接
             */
            disconnect() {
                if (this.ws && this.isConnected) {
                    this.ws.close();
                }
            }

            /**
             * 发送命令到中间件
             */
            sendCommand(action, data = null) {
                return new Promise((resolve, reject) => {
                    if (!this.isConnected) {
                        reject(new Error('WebSocket未连接'));
                        return;
                    }

                    const requestId = `req-${++this.requestId}`;
                    const command = {
                        Id: requestId,
                        Action: action,
                        Data: data
                    };

                    // 存储回调函数
                    this.requestCallbacks.set(requestId, { resolve, reject });

                    // 设置超时
                    setTimeout(() => {
                        if (this.requestCallbacks.has(requestId)) {
                            this.requestCallbacks.delete(requestId);
                            reject(new Error('请求超时'));
                        }
                    }, 10000);

                    // 发送命令
                    try {
                        this.ws.send(JSON.stringify(command));
                        this.log('发送命令:', command);
                    } catch (error) {
                        this.requestCallbacks.delete(requestId);
                        reject(error);
                    }
                });
            }

            /**
             * 获取系统中的真实打印机列表
             */
            async getPrinters() {
                try {
                    const response = await this.sendCommand('getprinters');
                    this.emit('printersUpdated', response.Data);
                    return response.Data || [];
                } catch (error) {
                    this.log('获取打印机列表失败:', error);
                    throw error;
                }
            }

            /**
             * 处理服务器消息
             */
            handleMessage(data) {
                try {
                    const message = JSON.parse(data);
                    this.log('收到消息:', message);

                    // 处理请求响应
                    if (message.Id && this.requestCallbacks.has(message.Id)) {
                        const callback = this.requestCallbacks.get(message.Id);
                        this.requestCallbacks.delete(message.Id);

                        if (message.Success) {
                            callback.resolve(message);
                        } else {
                            callback.reject(new Error(message.Message || '未知错误'));
                        }
                    }
                } catch (error) {
                    this.log('处理消息失败:', error);
                }
            }

            /**
             * 添加事件监听器
             */
            on(event, callback) {
                if (!this.eventListeners.has(event)) {
                    this.eventListeners.set(event, []);
                }
                this.eventListeners.get(event).push(callback);
            }

            /**
             * 触发事件
             */
            emit(event, data) {
                if (this.eventListeners.has(event)) {
                    this.eventListeners.get(event).forEach(callback => {
                        try {
                            callback(data);
                        } catch (error) {
                            this.log('事件回调错误:', error);
                        }
                    });
                }
            }

            /**
             * 获取连接状态
             */
            getConnectionState() {
                return this.isConnected;
            }

            /**
             * 日志输出
             */
            log(...args) {
                if (this.options.debug) {
                    console.log('[TwainSDK]', ...args);
                }
            }
        }

        // 主程序
        let twainSDK = null;
        let isConnected = false;

        // DOM元素
        const elements = {
            statusBar: document.getElementById('statusBar'),
            statusText: document.getElementById('statusText'),
            statusTime: document.getElementById('statusTime'),
            connectBtn: document.getElementById('connectBtn'),
            disconnectBtn: document.getElementById('disconnectBtn'),
            getPrintersBtn: document.getElementById('getPrintersBtn'),
            clearLogBtn: document.getElementById('clearLogBtn'),
            printerSelect: document.getElementById('printerSelect'),
            printerDetails: document.getElementById('printerDetails'),
            logContainer: document.getElementById('logContainer')
        };

        // 初始化
        document.addEventListener('DOMContentLoaded', function() {
            initSDK();
            bindEvents();
            updateUI(false);
            addLog('🚀 页面已加载，可以开始测试', 'info');
        });

        function initSDK() {
            try {
                twainSDK = new TwainMiddlewareSDK({
                    host: 'localhost',
                    port: 45677,
                    debug: true
                });

                twainSDK.on('connected', () => {
                    addLog('✅ WebSocket连接已建立', 'success');
                    updateUI(true);

                    // 自动获取打印机列表
                    setTimeout(() => {
                        getPrinters();
                    }, 500);
                });

                twainSDK.on('disconnected', (data) => {
                    addLog(`⚠️ WebSocket连接已断开 (代码: ${data.code})`, 'warning');
                    updateUI(false);
                });

                twainSDK.on('error', (error) => {
                    addLog(`❌ WebSocket错误: ${error.message || error}`, 'error');
                });

                twainSDK.on('printersUpdated', (printers) => {
                    addLog(`🖨️ 打印机列表已更新，找到 ${printers.length} 个打印机`, 'info');
                });

                addLog('✅ SDK已初始化完成', 'success');
            } catch (error) {
                addLog(`❌ SDK初始化失败: ${error.message}`, 'error');
            }
        }

        function bindEvents() {
            elements.connectBtn.onclick = connect;
            elements.disconnectBtn.onclick = disconnect;
            elements.getPrintersBtn.onclick = getPrinters;
            elements.clearLogBtn.onclick = clearLog;
        }

        async function connect() {
            try {
                addLog('🔄 正在连接到中间件...', 'info');
                await twainSDK.connect();
                addLog('✅ 连接成功！', 'success');
            } catch (error) {
                addLog(`❌ 连接失败: ${error.message}`, 'error');
                addLog('💡 请确保中间件程序正在运行', 'warning');
            }
        }

        function disconnect() {
            twainSDK.disconnect();
            addLog('🔌 已断开连接', 'info');
        }

        async function getPrinters() {
            try {
                addLog('🔄 正在获取打印机列表...', 'info');
                const printers = await twainSDK.getPrinters();
                updatePrinterList(printers);
                addLog(`✅ 获取打印机列表成功: ${printers.length} 个设备`, 'success');

                // 显示详细信息
                if (printers.length > 0) {
                    printers.forEach((printer, index) => {
                        addLog(`   ${index + 1}. ${printer.Name} ${printer.IsDefault ? '(默认)' : ''}`, 'info');
                    });
                }
            } catch (error) {
                addLog(`❌ 获取打印机列表失败: ${error.message}`, 'error');
            }
        }

        function updatePrinterList(printers) {
            elements.printerSelect.innerHTML = '';

            if (printers.length === 0) {
                elements.printerSelect.innerHTML = '<option value="">未找到打印机</option>';
                elements.printerDetails.innerHTML = '';
                return;
            }

            printers.forEach((printer, index) => {
                const option = document.createElement('option');
                option.value = index;
                option.textContent = `${printer.Name}${printer.IsDefault ? ' (默认)' : ''}`;
                elements.printerSelect.appendChild(option);
            });

            // 默认选择第一个打印机
            if (printers.length > 0) {
                elements.printerSelect.value = '0';
                showPrinterDetails(printers[0]);
            }

            // 添加选择变化事件
            elements.printerSelect.onchange = function() {
                const selectedIndex = this.value;
                if (selectedIndex !== '') {
                    showPrinterDetails(printers[parseInt(selectedIndex)]);
                }
            };
        }

        function showPrinterDetails(printer) {
            let details = `
                <h3>打印机详细信息</h3>
                <p><strong>名称:</strong> ${printer.Name}</p>
                <p><strong>是否默认:</strong> ${printer.IsDefault ? '是' : '否'}</p>
                <p><strong>状态:</strong> ${printer.Status || '未知'}</p>
                <p><strong>端口:</strong> ${printer.PortName || '未知'}</p>
                <p><strong>驱动:</strong> ${printer.DriverName || '未知'}</p>
            `;

            if (printer.IsNetworkPrinter !== undefined) {
                details += `<p><strong>网络打印机:</strong> ${printer.IsNetworkPrinter ? '是' : '否'}</p>`;
            }

            elements.printerDetails.innerHTML = details;
        }

        function updateUI(connected) {
            isConnected = connected && twainSDK.getConnectionState();

            elements.statusText.textContent = isConnected ? '✅ 已连接' : '❌ 未连接';
            elements.statusTime.textContent = new Date().toLocaleTimeString();
            elements.statusBar.className = `status-bar ${isConnected ? 'connected' : 'disconnected'}`;

            elements.connectBtn.disabled = isConnected;
            elements.disconnectBtn.disabled = !isConnected;
            elements.getPrintersBtn.disabled = !isConnected;
            elements.printerSelect.disabled = !isConnected;

            if (!isConnected) {
                elements.printerSelect.innerHTML = '<option value="">请先连接中间件</option>';
                elements.printerDetails.innerHTML = '';
            }
        }

        function addLog(message, type = 'info') {
            const timestamp = new Date().toLocaleTimeString();
            const logEntry = document.createElement('div');
            logEntry.className = `log-entry log-${type}`;
            logEntry.innerHTML = `[${timestamp}] ${message}`;

            elements.logContainer.appendChild(logEntry);
            elements.logContainer.scrollTop = elements.logContainer.scrollHeight;
        }

        function clearLog() {
            elements.logContainer.innerHTML = '';
            addLog('📝 日志已清空', 'info');
        }
    </script>
</body>
</html>