Upload public.js

backend/src/routes/public.js

@@ -259,6 +259,28 @@ router.get('/api-view/:userId/:pptId/:slideIndex?', async (req, res, next) => {
     }
 
     const slideIdx = parseInt(slideIndex);
+    
+    // 安全检查：确保 slides 数组存在
+    if (!pptData.slides || !Array.isArray(pptData.slides)) {
+      console.log(`❌ Invalid PPT data: slides array not found`);
+      
+      if (format === 'svg') {
+        const invalidDataSvg = `<svg width="800" height="450" xmlns="http://www.w3.org/2000/svg">
+          <rect width="100%" height="100%" fill="#f8f9fa"/>
+          <text x="400" y="200" text-anchor="middle" font-family="Arial, sans-serif" font-size="24" fill="#6c757d">Invalid PPT Data</text>
+          <text x="400" y="250" text-anchor="middle" font-family="Arial, sans-serif" font-size="16" fill="#6c757d">Slides data not found</text>
+          <text x="400" y="300" text-anchor="middle" font-family="Arial, sans-serif" font-size="12" fill="#999">${new Date().toISOString()}</text>
+        </svg>`;
+        
+        res.setHeader('Content-Type', 'image/svg+xml; charset=utf-8');
+        return res.send(invalidDataSvg);
+      } else {
+        const errorPage = generateErrorPage('Invalid PPT Data', 'PPT slides data not found or corrupted.');
+        res.setHeader('Content-Type', 'text/html; charset=utf-8');
+        return res.status(400).send(errorPage);
+      }
+    }
+    
     if (slideIdx >= pptData.slides.length || slideIdx < 0) {
       return res.status(404).json({ error: 'Slide not found' });
     }
@@ -421,6 +443,28 @@ router.get('/screenshot/:userId/:pptId/:slideIndex?', async (req, res, next) =>
     }
 
     const slideIdx = parseInt(slideIndex);
+    
+    // 安全检查：确保 slides 数组存在
+    if (!pptData.slides || !Array.isArray(pptData.slides)) {
+      console.log(`❌ Invalid PPT data: slides array not found`);
+      
+      if (format === 'svg') {
+        const invalidDataSvg = `<svg width="800" height="450" xmlns="http://www.w3.org/2000/svg">
+          <rect width="100%" height="100%" fill="#f8f9fa"/>
+          <text x="400" y="200" text-anchor="middle" font-family="Arial, sans-serif" font-size="24" fill="#6c757d">Invalid PPT Data</text>
+          <text x="400" y="250" text-anchor="middle" font-family="Arial, sans-serif" font-size="16" fill="#6c757d">Slides data not found</text>
+          <text x="400" y="300" text-anchor="middle" font-family="Arial, sans-serif" font-size="12" fill="#999">${new Date().toISOString()}</text>
+        </svg>`;
+        
+        res.setHeader('Content-Type', 'image/svg+xml; charset=utf-8');
+        return res.send(invalidDataSvg);
+      } else {
+        const errorPage = generateErrorPage('Invalid PPT Data', 'PPT slides data not found or corrupted.');
+        res.setHeader('Content-Type', 'text/html; charset=utf-8');
+        return res.status(400).send(errorPage);
+      }
+    }
+    
     if (slideIdx >= pptData.slides.length || slideIdx < 0) {
       return res.status(404).json({ error: 'Invalid slide index' });
     }
@@ -528,6 +572,28 @@ router.get('/image/:userId/:pptId/:slideIndex?', async (req, res, next) => {
     }
 
     const slideIdx = parseInt(slideIndex);
+    
+    // 安全检查：确保 slides 数组存在
+    if (!pptData.slides || !Array.isArray(pptData.slides)) {
+      console.log(`❌ Invalid PPT data: slides array not found`);
+      
+      if (format === 'svg') {
+        const invalidDataSvg = `<svg width="800" height="450" xmlns="http://www.w3.org/2000/svg">
+          <rect width="100%" height="100%" fill="#f8f9fa"/>
+          <text x="400" y="200" text-anchor="middle" font-family="Arial, sans-serif" font-size="24" fill="#6c757d">Invalid PPT Data</text>
+          <text x="400" y="250" text-anchor="middle" font-family="Arial, sans-serif" font-size="16" fill="#6c757d">Slides data not found</text>
+          <text x="400" y="300" text-anchor="middle" font-family="Arial, sans-serif" font-size="12" fill="#999">${new Date().toISOString()}</text>
+        </svg>`;
+        
+        res.setHeader('Content-Type', 'image/svg+xml; charset=utf-8');
+        return res.send(invalidDataSvg);
+      } else {
+        const errorPage = generateErrorPage('Invalid PPT Data', 'PPT slides data not found or corrupted.');
+        res.setHeader('Content-Type', 'text/html; charset=utf-8');
+        return res.status(400).send(errorPage);
+      }
+    }
+    
     if (slideIdx >= pptData.slides.length || slideIdx < 0) {
       console.log(`❌ Invalid slide index: ${slideIndex}`);
       
@@ -670,6 +736,28 @@ router.get('/screenshot-data/:userId/:pptId/:slideIndex?', async (req, res, next
     }
 
     const slideIdx = parseInt(slideIndex);
+    
+    // 安全检查：确保 slides 数组存在
+    if (!pptData.slides || !Array.isArray(pptData.slides)) {
+      console.log(`❌ Invalid PPT data: slides array not found`);
+      
+      if (format === 'svg') {
+        const invalidDataSvg = `<svg width="800" height="450" xmlns="http://www.w3.org/2000/svg">
+          <rect width="100%" height="100%" fill="#f8f9fa"/>
+          <text x="400" y="200" text-anchor="middle" font-family="Arial, sans-serif" font-size="24" fill="#6c757d">Invalid PPT Data</text>
+          <text x="400" y="250" text-anchor="middle" font-family="Arial, sans-serif" font-size="16" fill="#6c757d">Slides data not found</text>
+          <text x="400" y="300" text-anchor="middle" font-family="Arial, sans-serif" font-size="12" fill="#999">${new Date().toISOString()}</text>
+        </svg>`;
+        
+        res.setHeader('Content-Type', 'image/svg+xml; charset=utf-8');
+        return res.send(invalidDataSvg);
+      } else {
+        const errorPage = generateErrorPage('Invalid PPT Data', 'PPT slides data not found or corrupted.');
+        res.setHeader('Content-Type', 'text/html; charset=utf-8');
+        return res.status(400).send(errorPage);
+      }
+    }
+    
     if (slideIdx >= pptData.slides.length || slideIdx < 0) {
       return res.status(404).json({ error: 'Invalid slide index' });
     }
@@ -775,6 +863,28 @@ router.get('/screenshot-tool/:userId/:pptId/:slideIndex?', async (req, res, next
     }
 
     const slideIdx = parseInt(slideIndex);
+    
+    // 安全检查：确保 slides 数组存在
+    if (!pptData.slides || !Array.isArray(pptData.slides)) {
+      console.log(`❌ Invalid PPT data: slides array not found`);
+      
+      if (format === 'svg') {
+        const invalidDataSvg = `<svg width="800" height="450" xmlns="http://www.w3.org/2000/svg">
+          <rect width="100%" height="100%" fill="#f8f9fa"/>
+          <text x="400" y="200" text-anchor="middle" font-family="Arial, sans-serif" font-size="24" fill="#6c757d">Invalid PPT Data</text>
+          <text x="400" y="250" text-anchor="middle" font-family="Arial, sans-serif" font-size="16" fill="#6c757d">Slides data not found</text>
+          <text x="400" y="300" text-anchor="middle" font-family="Arial, sans-serif" font-size="12" fill="#999">${new Date().toISOString()}</text>
+        </svg>`;
+        
+        res.setHeader('Content-Type', 'image/svg+xml; charset=utf-8');
+        return res.send(invalidDataSvg);
+      } else {
+        const errorPage = generateErrorPage('Invalid PPT Data', 'PPT slides data not found or corrupted.');
+        res.setHeader('Content-Type', 'text/html; charset=utf-8');
+        return res.status(400).send(errorPage);
+      }
+    }
+    
     if (slideIdx >= pptData.slides.length || slideIdx < 0) {
       const errorPage = generateErrorPage('Invalid Slide', `Slide ${slideIndex} not found in PPT`);
       res.setHeader('Content-Type', 'text/html; charset=utf-8');
@@ -955,6 +1065,28 @@ router.get('/direct-image/:userId/:pptId/:slideIndex?', async (req, res, next) =
     }
 
     const slideIdx = parseInt(slideIndex);
+    
+    // 安全检查：确保 slides 数组存在
+    if (!pptData.slides || !Array.isArray(pptData.slides)) {
+      console.log(`❌ Invalid PPT data: slides array not found`);
+      
+      if (format === 'svg') {
+        const invalidDataSvg = `<svg width="800" height="450" xmlns="http://www.w3.org/2000/svg">
+          <rect width="100%" height="100%" fill="#f8f9fa"/>
+          <text x="400" y="200" text-anchor="middle" font-family="Arial, sans-serif" font-size="24" fill="#6c757d">Invalid PPT Data</text>
+          <text x="400" y="250" text-anchor="middle" font-family="Arial, sans-serif" font-size="16" fill="#6c757d">Slides data not found</text>
+          <text x="400" y="300" text-anchor="middle" font-family="Arial, sans-serif" font-size="12" fill="#999">${new Date().toISOString()}</text>
+        </svg>`;
+        
+        res.setHeader('Content-Type', 'image/svg+xml; charset=utf-8');
+        return res.send(invalidDataSvg);
+      } else {
+        const errorPage = generateErrorPage('Invalid PPT Data', 'PPT slides data not found or corrupted.');
+        res.setHeader('Content-Type', 'text/html; charset=utf-8');
+        return res.status(400).send(errorPage);
+      }
+    }
+    
     if (slideIdx >= pptData.slides.length || slideIdx < 0) {
       console.log(`❌ Invalid slide index: ${slideIndex}`);
       // 返回404幻灯片SVG