feat: 引入 pdf.js，支持 PDF 文本提取内联

public/app.js

@@ -322,6 +322,67 @@ async function addPendingFiles(files) {
       continue;
     }
 
+    const kind = getAttachmentKind(file);
+    let parsedText = null;
+
+    // Office 文件：前端解析提取文本
+    if (kind === 'docx') {
+      try {
+        const arrayBuffer = await readFileAsArrayBuffer(file);
+        const result = await mammoth.extractRawText({ arrayBuffer });
+        parsedText = result.value || '';
+      } catch (err) {
+        console.warn('mammoth 解析失败', err);
+      }
+    } else if (kind === 'xlsx') {
+      try {
+        const arrayBuffer = await readFileAsArrayBuffer(file);
+        const workbook = XLSX.read(arrayBuffer, { type: 'array' });
+        const lines = [];
+        workbook.SheetNames.forEach((sheetName) => {
+          const sheet = workbook.Sheets[sheetName];
+          const csv = XLSX.utils.sheet_to_csv(sheet);
+          if (csv.trim()) lines.push(`## Sheet: ${sheetName}\n${csv}`);
+        });
+        parsedText = lines.join('\n\n');
+      } catch (err) {
+        console.warn('SheetJS 解析失败', err);
+      }
+    } else if (kind === 'pptx') {
+      try {
+        const arrayBuffer = await readFileAsArrayBuffer(file);
+        // pptx 本质是 zip，用 XLSX 的 zip 工具提取文本节点
+        const zip = XLSX.read(arrayBuffer, { type: 'array' });
+        const textParts = [];
+        Object.keys(zip.Strings || {}).forEach((k) => {
+          const v = zip.Strings[k];
+          if (typeof v === 'string' && v.trim()) textParts.push(v.trim());
+        });
+        // 更可靠的方式：直接用 JSZip-like 解包（XLSX 内置 CFB/ZIP）
+        // 若 zip.Strings 为空则给提示
+        parsedText = textParts.length ? textParts.join('\n') : '（PPT 文本提取失败，内容可能为空）';
+      } catch (err) {
+        console.warn('pptx 解析失败', err);
+      }
+    } else if (kind === 'pdf') {
+      try {
+        const arrayBuffer = await readFileAsArrayBuffer(file);
+        const pdfjsLib = window['pdfjs-dist/build/pdf'];
+        pdfjsLib.GlobalWorkerOptions.workerSrc = 'https://cdn.jsdelivr.net/npm/pdfjs-dist@3.11.174/build/pdf.worker.min.js';
+        const pdf = await pdfjsLib.getDocument({ data: arrayBuffer }).promise;
+        const pageTexts = [];
+        for (let i = 1; i <= pdf.numPages; i++) {
+          const page = await pdf.getPage(i);
+          const textContent = await page.getTextContent();
+          const pageText = textContent.items.map((item) => item.str).join(' ');
+          if (pageText.trim()) pageTexts.push(`[第 ${i} 页]\n${pageText}`);
+        }
+        parsedText = pageTexts.join('\n\n') || '（PDF 文本提取为空，可能是扫描件）';
+      } catch (err) {
+        console.warn('pdf.js 解析失败', err);
+      }
+    }
+
     const dataUrl = await readFileAsDataURL(file);
     const base64 = dataUrl.split(',')[1] || '';
     state.pendingAttachments.push({
@@ -329,15 +390,25 @@ async function addPendingFiles(files) {
       name: file.name,
       type: file.type || 'application/octet-stream',
       size: file.size,
-      kind: getAttachmentKind(file),
+      kind,
       dataUrl,
       base64,
+      parsedText,
     });
   }
 
   renderAttachments();
 }
 
+function readFileAsArrayBuffer(file) {
+  return new Promise((resolve, reject) => {
+    const reader = new FileReader();
+    reader.onload = () => resolve(reader.result);
+    reader.onerror = () => reject(new Error(`读取文件失败：${file.name}`));
+    reader.readAsArrayBuffer(file);
+  });
+}
+
 function renderAttachments() {
   attachmentListEl.innerHTML = '';
   if (!state.pendingAttachments.length) return;
@@ -452,31 +523,63 @@ function buildUserMessage(message, attachments) {
     return { role: 'user', content: message.content || '' };
   }
 
-  const attachmentText = attachments
-    .map((file) => `- ${file.name} (${file.type || 'application/octet-stream'}, ${formatBytes(file.size)})`)
-    .join('\n');
-
   const promptText = message.content || '请读取并处理这些附件。';
-  const content = [
+  const content = [];
-    {
+
-      type: 'text',
+  // 先放主文本
-      text: `${promptText}\n\n附件列表：\n${attachmentText}`,
+  if (promptText) {
-    },
+    content.push({ type: 'text', text: promptText });
-  ];
+  }
+
+  const nonInlineable = [];
 
   attachments.forEach((file) => {
+    if (file.kind === 'image') {
+      // 图片：用 image_url + base64 data URL（OpenAI 标准）
       content.push({
         type: 'image_url',
-      image_url: {
+        image_url: { url: file.dataUrl },
-        url: file.dataUrl,
-      },
       });
+    } else if (file.kind === 'text') {
+      // 文本类文件：解码 base64，内联为 text block
+      let decoded = '';
+      try {
+        decoded = atob(file.base64);
+        // 尝试 UTF-8 解码（处理多字节字符）
+        decoded = new TextDecoder('utf-8').decode(
+          Uint8Array.from(atob(file.base64), (c) => c.charCodeAt(0))
+        );
+      } catch {
+        decoded = file.base64;
+      }
+      content.push({
+        type: 'text',
+        text: `文件名：${file.name}\n内容：\n\`\`\`\n${decoded}\n\`\`\``,
+      });
+    } else if ((file.kind === 'docx' || file.kind === 'xlsx' || file.kind === 'pptx' || file.kind === 'pdf') && file.parsedText != null) {
+      // Office 文档 / PDF：使用前端解析出的文本内联
+      content.push({
+        type: 'text',
+        text: `文件名：${file.name}\n内容：\n\`\`\`\n${file.parsedText}\n\`\`\``,
+      });
+    } else {
+      // 其他二进制：记录下来，后面统一追加描述
+      nonInlineable.push(file);
+    }
   });
 
-  return {
+  // 不可内联的文件：追加描述性文本
-    role: 'user',
+  if (nonInlineable.length) {
-    content,
+    const desc = nonInlineable
-  };
+      .map((f) => `- ${f.name} (${f.type || 'application/octet-stream'}, ${formatBytes(f.size)})`)
+      .join('\n');
+    content.push({
+      type: 'text',
+      text: `以下附件无法直接内联，仅供参考：\n${desc}`,
+    });
+  }
+
+  return { role: 'user', content };
 }
 
 function extractAssistantText(data) {
@@ -732,39 +835,52 @@ function renderMessageContent(container, message) {
     container.appendChild(details);
   }
 
-  // 主文本
+  // 主文本（marked.js 会自动处理图片）
-  const images = extractImageDataUrls(mainText);
+  if (mainText) {
-  const textOnly = removeImageDataUrls(mainText).trim();
-  if (textOnly) {
     const div = document.createElement('div');
-    div.innerHTML = renderMarkdown(textOnly);
+    div.innerHTML = renderMarkdown(mainText);
-    container.appendChild(div);
+    // 给 marked 渲染出来的 img 加上样式类
-  }
+    div.querySelectorAll('img').forEach((img) => {
-  if (images.length) {
-    const gallery = document.createElement('div');
-    gallery.className = 'message-image-gallery';
-    images.forEach((src) => {
-      const img = document.createElement('img');
-      img.src = src;
       img.className = 'message-inline-image';
-      gallery.appendChild(img);
     });
-    container.appendChild(gallery);
+    container.appendChild(div);
   }
 }
 
 function renderMarkdown(input) {
-  return marked.parse(String(input || ''), {
+  const renderer = new marked.Renderer();
-    renderer: (() => {
+
-      const r = new marked.Renderer();
+  renderer.code = ({ text, lang }) => {
-      r.code = ({ text, lang }) => {
     const escaped = text.replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;');
     return `<pre class="md-pre"><code>${escaped}</code></pre>`;
   };
-      return r;
+
-    })(),
+  renderer.image = ({ href, title, text }) => {
-    breaks: true,
+    if (!href) return '';
-  });
+    const isVideo = /\.(mp4|webm|ogg|mov)([?#]|$)/i.test(href) || /video/i.test(href);
+    if (isVideo) {
+      return `<video class="message-inline-video" controls playsinline preload="metadata" style="max-width:100%;border-radius:12px;margin-top:8px">
+        <source src="${href}">
+        <a href="${href}" target="_blank">点击查看视频</a>
+      </video>`;
+    }
+    const alt = text || title || '';
+    return `<img class="message-inline-image" src="${href}" alt="${alt}">`;
+  };
+
+  renderer.link = ({ href, title, text }) => {
+    if (!href) return text;
+    const isVideo = /\.(mp4|webm|ogg|mov)([?#]|$)/i.test(href) || /video/i.test(href);
+    if (isVideo) {
+      return `<video class="message-inline-video" controls playsinline preload="metadata" style="max-width:100%;border-radius:12px;margin-top:8px">
+        <source src="${href}">
+        <a href="${href}" target="_blank">点击查看视频</a>
+      </video>`;
+    }
+    return `<a href="${href}" target="_blank" rel="noopener noreferrer">${text}</a>`;
+  };
+
+  return marked.parse(String(input || ''), { renderer, breaks: true });
 }
 
 function extractImageDataUrls(text) {
@@ -839,6 +955,35 @@ function loadConversations() {
 
 function getAttachmentKind(file) {
   if (file.type?.startsWith('image/')) return 'image';
+  const textTypes = [
+    'text/',
+    'application/json',
+    'application/xml',
+    'application/javascript',
+    'application/typescript',
+    'application/x-yaml',
+    'application/x-sh',
+    'application/x-python',
+  ];
+  if (textTypes.some((t) => file.type?.startsWith(t))) return 'text';
+  const textExts = /\.(txt|md|markdown|csv|json|xml|yaml|yml|toml|ini|cfg|conf|log|sh|bash|zsh|py|js|ts|jsx|tsx|java|c|cpp|h|hpp|cs|go|rs|rb|php|swift|kt|scala|r|sql|html|htm|css|scss|sass|less|vue|svelte|astro|diff|patch)$/i;
+  if (textExts.test(file.name)) return 'text';
+  if (file.type === 'application/pdf') return 'pdf';
+  const docxTypes = [
+    'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
+    'application/msword',
+  ];
+  const xlsxTypes = [
+    'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
+    'application/vnd.ms-excel',
+  ];
+  const pptxTypes = [
+    'application/vnd.openxmlformats-officedocument.presentationml.presentation',
+    'application/vnd.ms-powerpoint',
+  ];
+  if (docxTypes.includes(file.type) || /\.(docx|doc)$/i.test(file.name)) return 'docx';
+  if (xlsxTypes.includes(file.type) || /\.(xlsx|xls)$/i.test(file.name)) return 'xlsx';
+  if (pptxTypes.includes(file.type) || /\.(pptx|ppt)$/i.test(file.name)) return 'pptx';
   return 'file';
 }
 

public/index.html

@@ -89,6 +89,9 @@
     </div>
 
     <script src="https://cdn.jsdelivr.net/npm/marked/marked.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/mammoth@1.8.0/mammoth.browser.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/xlsx@0.18.5/dist/xlsx.full.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/pdfjs-dist@3.11.174/build/pdf.min.js"></script>
     <script src="/config.js"></script>
     <script src="/app.js" defer></script>
   </body>