全局异常捕获，特别是IOClosed错误，避免服务器崩溃

Html/apps/static/js/index.js

@@ -1,41 +1,53 @@
-function show_books(courses_data, user_selected_courses){
+function show_books(courses_data, user_selected_courses) {
     console.log(courses_data)
     console.log(user_selected_courses)
 }
-function show_course_details(course_id){
+function show_course_details(course_id) {
     window.location.href = '/course/' + course_id
 }
 
-function on_click_select_course(event){
+function on_click_select_course(event) {
     event.stopPropagation(); // 阻止事件冒泡
-    const courseId = event.currentTarget.getAttribute('data-course-id');
-    if (event.currentTarget.classList.contains("selected-button")) {alert('课程已选择'); return;}
+    const button = event.currentTarget;
+    const courseId = button.getAttribute('data-course-id');
+    if (!courseId) { alert('缺少课程ID'); return; }
+    if (button.classList.contains("selected-button")) { alert('课程已选择'); return; }
+    if (button.disabled) { return; }
+    button.disabled = true;
     fetch(`/select_course`, {
         method: 'POST',
         headers: {
             'Content-Type': 'application/json',
-            'X-CSRFToken': '{{ csrf_token() }}' // 如果使用 CSRF 保护
         },
         body: JSON.stringify({ course_id: courseId })
     })
-    .then(response => response.json())
-    .then(data => {
-        if (data.success) {
-            // 更新按钮样式或显示消息
-            this.classList.remove('select-button');
-            this.classList.add('selected-button');
-            this.textContent = '已选择';
-            alert('选择课程成功');
-        } else {
-            alert('选择课程失败');
+        .then(async (response) => {
+            let data = null;
+            try {
+                data = await response.json();
+            } catch (_) {
             }
+            if (!response.ok) {
+                throw new Error(data?.message || `请求失败(${response.status})`);
+            }
+            return data;
+        })
+        .then((data) => {
+            if (!data?.success) {
+                throw new Error(data?.message || '选择课程失败');
+            }
+            button.classList.remove('select-button');
+            button.classList.add('selected-button');
+            button.textContent = '已选课';
+            alert('选择课程成功');
         })
         .catch(error => {
             console.error('Error:', error);
-        alert('选择课程失败');
+            alert(error?.message || '选择课程失败');
+            button.disabled = false;
         });
 }
 
-document.addEventListener('DOMContentLoaded', function() {
+document.addEventListener('DOMContentLoaded', function () {
 
 });

Html/apps/static/js/lesson.js

@@ -1,4 +1,4 @@
-window.addEventListener('load', ()=>{
+window.addEventListener('load', () => {
   console.log(window.material);
   console.log(window.lesson);
   editLesson(window.material.material_id, window.chapter.chapter_name, window.lesson.lesson_name);
@@ -12,58 +12,58 @@ function parseHeadings(mdText) {
 
   const lines = mdText.split('\n');
   const tokens = [];
-    for (let i=0;i<lines.length;i++) {
+  for (let i = 0; i < lines.length; i++) {
     const m = lines[i].match(/^(#{1,3})\s+(.*)$/);
     if (m) tokens.push({ level: m[1].length, text: m[2].trim(), line: i });
   }
   // 确定每个heading的区间（到下一个同级或上级前一行）
-    for (let i=0;i<tokens.length;i++) {
-      let j = i+1;
-      while (j<tokens.length && tokens[j].level > tokens[i].level) j++;
+  for (let i = 0; i < tokens.length; i++) {
+    let j = i + 1;
+    while (j < tokens.length && tokens[j].level > tokens[i].level) j++;
     // 找到第一个 >= 当前level 的 heading 或到文末
-      let k = i+1;
-      while (k<tokens.length && tokens[k].level > tokens[i].level) k++;
-      const nextSameOrHigher = k<tokens.length ? tokens[k].line : lines.length;
+    let k = i + 1;
+    while (k < tokens.length && tokens[k].level > tokens[i].level) k++;
+    const nextSameOrHigher = k < tokens.length ? tokens[k].line : lines.length;
     tokens[i].start = tokens[i].line;
     tokens[i].end = nextSameOrHigher - 1;
   }
   return { lines, tokens };
-  }
+}
 
-  // 从解析结果中抽取一个 heading 段落文本
-  function sliceSection(parsed, headingText, level) {
-    const t = parsed.tokens.find(x => x.level===level && x.text===headingText);
+// 从解析结果中抽取一个 heading 段落文本
+function sliceSection(parsed, headingText, level) {
+  const t = parsed.tokens.find(x => x.level === level && x.text === headingText);
   if (!t) return '';
-    return parsed.lines.slice(t.start, t.end+1).join('\n');
-  }
+  return parsed.lines.slice(t.start, t.end + 1).join('\n');
+}
 
-  // 根据三个 md，构造统一大纲树（一级唯一“主题”，其下多个阶段##，其下多个步骤###）
-  function buildUnifiedOutline(parsedLesson, parsedPrompt, parsedScore) {
+// 根据三个 md，构造统一大纲树（一级唯一“主题”，其下多个阶段##，其下多个步骤###）
+function buildUnifiedOutline(parsedLesson, parsedPrompt, parsedScore) {
   // 取 lesson 的结构为主（也可做三者交集/并集策略，这里简单以 lesson 为基准）
-    const root1 = parsedLesson.tokens.find(t => t.level===1);
-    const phases = parsedLesson.tokens.filter(t => t.level===2);
+  const root1 = parsedLesson.tokens.find(t => t.level === 1);
+  const phases = parsedLesson.tokens.filter(t => t.level === 2);
   const stepsByPhase = {};
   phases.forEach(ph => {
-      stepsByPhase[ph.text] = parsedLesson.tokens.filter(t => t.level===3 && t.start>ph.start && t.end<=ph.end)
+    stepsByPhase[ph.text] = parsedLesson.tokens.filter(t => t.level === 3 && t.start > ph.start && t.end <= ph.end)
       .map(s => s.text);
   });
   return { theme: root1 ? root1.text : '主题', phases, stepsByPhase };
-  }
+}
 
-  let CURRENT = {
+let CURRENT = {
   material_id: null, chapter_name: null, lesson_name: null,
-    links: { lesson:'', prompt:'', score:'' },
-    raw:   { lesson:'', prompt:'', score:'' },
-    parsed:{ lesson:null, prompt:null, score:null },
-    active:{ phase:null, step:null, lessontxt:null, prompt:null, score:null },
-    outline:null
-  };
-  function bustCache(url) {
+  links: { lesson: '', prompt: '', score: '' },
+  raw: { lesson: '', prompt: '', score: '' },
+  parsed: { lesson: null, prompt: null, score: null },
+  active: { phase: null, step: null, lessontxt: null, prompt: null, score: null },
+  outline: null
+};
+function bustCache(url) {
   const sep = url.includes("?") ? "&" : "?";
   return url + sep + "_ts=" + Date.now();
-  }
-  // 入口：从你的列表调用
-  async function editLesson(material_id, chapter_name, lesson_name) {
+}
+// 入口：从你的列表调用
+async function editLesson(material_id, chapter_name, lesson_name) {
 
   CURRENT.material_id = material_id;
   CURRENT.chapter_name = chapter_name;
@@ -84,7 +84,7 @@ function parseHeadings(mdText) {
   detailsContent.innerHTML = `<h4>描述</h4><p>${meta.description || meta.material_description || '暂无描述'}</p>`;
   const chapterList = document.getElementById('chapter-list');
   chapterList.innerHTML = '';
-    (meta.chapters||[]).forEach(ch=>{
+  (meta.chapters || []).forEach(ch => {
     const li = document.createElement('li');
     li.textContent = ch.chapter_name;
     chapterList.appendChild(li);
@@ -125,10 +125,10 @@ function parseHeadings(mdText) {
     document.getElementById('editor-prompt').value = CURRENT.raw.prompt;
     document.getElementById('editor-score').value = CURRENT.raw.score;
   }
-  }
+}
 
-  // ===== 在渲染一级标题时调用 =====
-  function addThemeWithHelp(tree, themeText) {
+// ===== 在渲染一级标题时调用 =====
+function addThemeWithHelp(tree, themeText) {
   const li = document.createElement('li');
   li.className = 'lvl1';
 
@@ -175,9 +175,9 @@ function parseHeadings(mdText) {
   );
 
   tree.appendChild(li);
-  }
+}
 
-  function renderOutline(outline) {
+function renderOutline(outline) {
   const tree = document.getElementById('outline-tree');
   tree.innerHTML = ''; // 清空大纲内容
 
@@ -220,7 +220,7 @@ function parseHeadings(mdText) {
               if (window.confirm(confirmMsg)) {
                 saveUpdatedStep()
               }
-                }else{
+            } else {
               // 已存在新标题：保持原文不变 
               alert("新标题已存在")
             }
@@ -339,21 +339,21 @@ function addStepToPhase(phaseText) {
   renderOutline(CURRENT.outline);
   loadStepToEditors(phaseText, stepName);
   highlightActive(phaseText, stepName);
-  }
-  function highlightActive(phase, step) {
-    document.querySelectorAll('#outline-tree li').forEach(li=>li.classList.remove('active'));
+}
+function highlightActive(phase, step) {
+  document.querySelectorAll('#outline-tree li').forEach(li => li.classList.remove('active'));
   const target = Array.from(document.querySelectorAll('#outline-tree li.lvl3'))
-                      .find(li => li.dataset.phase===phase && li.dataset.step===step);
+    .find(li => li.dataset.phase === phase && li.dataset.step === step);
   if (target) target.classList.add('active');
-    CURRENT.active.phase=phase
-    CURRENT.active.step=step
-  }
-    /**
-   * 在 mdText 中，将 `### stepName` 插入到 `## phaseText` 阶段的末尾。
-   * 若 phase 不存在，则创建 `## phaseText` 再插入。
-   * skeleton 为插入文本模板（含### 标题本身及正文）。
-   */
-    function insertStepIntoMarkdown(mdText, phaseText, stepName, skeleton, { allowDuplicate = false } = {}) {
+  CURRENT.active.phase = phase
+  CURRENT.active.step = step
+}
+/**
+* 在 mdText 中，将 `### stepName` 插入到 `## phaseText` 阶段的末尾。
+* 若 phase 不存在，则创建 `## phaseText` 再插入。
+* skeleton 为插入文本模板（含### 标题本身及正文）。
+*/
+function insertStepIntoMarkdown(mdText, phaseText, stepName, skeleton, { allowDuplicate = false } = {}) {
   const parsed = parseHeadings(mdText);
   const { lines, tokens } = parsed;
   // 找到目标阶段（##）
@@ -419,35 +419,35 @@ function addStepToPhase(phaseText) {
     .concat(insertChunk)
     .concat(lines.slice(insertPos));
   return newLines.join('\n');
-    }
+}
 
 
-  const outlineAside  = document.querySelector('.outline');
-  const outlineTree   = document.getElementById('outline-tree');
-  const btnDeleteMode = document.getElementById('toggle-outline-delete');
+const outlineAside = document.querySelector('.outline');
+const outlineTree = document.getElementById('outline-tree');
+const btnDeleteMode = document.getElementById('toggle-outline-delete');
 
-  // 切换删除模式
-  function setDeleteMode(enabled) {
+// 切换删除模式
+function setDeleteMode(enabled) {
   btnDeleteMode.setAttribute('aria-pressed', String(enabled));
   outlineAside.classList.toggle('delete-mode', enabled);
-  }
+}
 
-  // 点击按钮：进入/退出删除模式
-  btnDeleteMode.addEventListener('click', (e) => {
+// 点击按钮：进入/退出删除模式
+btnDeleteMode.addEventListener('click', (e) => {
   e.preventDefault();
   const enabled = btnDeleteMode.getAttribute('aria-pressed') !== 'true';
   setDeleteMode(enabled);
-  });
+});
 
-  // 工具：判断是否是 lvl2 / lvl3 节点（允许点到它的内部子元素）
-  function findDeletableNode(el) {
+// 工具：判断是否是 lvl2 / lvl3 节点（允许点到它的内部子元素）
+function findDeletableNode(el) {
   if (!el) return null;
   if (el.classList?.contains('lvl2') || el.classList?.contains('lvl3')) return el;
   return el.closest?.('.lvl2, .lvl3') || null;
-  }
+}
 
-  // 事件代理：删除模式下，点击二/三级标题进行删除确认
-  outlineTree.addEventListener('click', (e) => {
+// 事件代理：删除模式下，点击二/三级标题进行删除确认
+outlineTree.addEventListener('click', (e) => {
   if (btnDeleteMode.getAttribute('aria-pressed') !== 'true') return; // 非删除模式，忽略
   const targetNode = findDeletableNode(e.target);
   if (!targetNode) return;
@@ -472,7 +472,7 @@ function addStepToPhase(phaseText) {
   // 可选：如果你需要同步删除到正文内容（CURRENT.raw.xxx），可以在这里调用你的同步逻辑
   // 例：把正文中第一处行首 "## 标题" 或 "### 标题" 删除（仅示例，按你项目规则调整）：
   deleteSectionInRaw(level, text);
-  });
+});
 /**
  * 删除指定 level(2/3) 与 title 的小节：
  * 从 "^## title$" 或 "^### title$" 那一行开始，
@@ -512,8 +512,8 @@ function deleteSectionInRaw(level, title) {
 
 
 
-  // 解析Markdown并定位章节/步骤
-  function parseHeadings(mdText) {
+// 解析Markdown并定位章节/步骤
+function parseHeadings(mdText) {
   const lines = mdText.split('\n');
   const tokens = [];
   for (let i = 0; i < lines.length; i++) {
@@ -531,19 +531,27 @@ function deleteSectionInRaw(level, title) {
     tokens[i].end = nextSameOrHigher - 1;
   }
   return { lines, tokens };
-  }
+}
 
-  // 从解析结果中抽取一个 heading 段落文本
-  function sliceSection(parsed, headingText, level) {
+// 从解析结果中抽取一个 heading 段落文本
+function sliceSection(parsed, headingText, level) {
   const t = parsed.tokens.find(x => x.level === level && x.text === headingText);
   if (!t) return '';
   return parsed.lines.slice(t.start, t.end + 1).join('\n');
-  }
-  function buildOriginSaveUrl() {
-    return `/api/materials/save/${encodeURIComponent(CURRENT.material_id)}/${encodeURIComponent(CURRENT.chapter_name)}/${encodeURIComponent(CURRENT.lesson_name)}`;
-  }
+}
 
-  /**
+// 加载某个步骤到编辑器
+function buildOriginSaveUrl() {
+  const mid = typeof CURRENT.material_id === 'string' && CURRENT.material_id
+    || (window.material && window.material.material_id) || '';
+  const ch = typeof CURRENT.chapter_name === 'string' && CURRENT.chapter_name
+    || (window.chapter && window.chapter.chapter_name) || '';
+  const ln = typeof CURRENT.lesson_name === 'string' && CURRENT.lesson_name
+    || (window.lesson && window.lesson.lesson_name) || '';
+  return `/api/materials/save/${encodeURIComponent(mid)}/${encodeURIComponent(ch)}/${encodeURIComponent(ln)}`;
+}
+
+/**
  * 把三份文档（lesson/prompt/score）的 "CDN 外链 + 原文内容" 一次性提交给源站。
  * @param {Object} payload 形如：
  * {
@@ -552,7 +560,7 @@ function deleteSectionInRaw(level, title) {
  *   score:  { cdn_link, content }
  * }
  */
-  async function saveToOrigin(payload) {
+async function saveToOrigin(payload) {
   const res = await fetch(buildOriginSaveUrl(), {
     method: 'POST',
     headers: { 'Content-Type': 'application/json' },
@@ -565,11 +573,11 @@ function deleteSectionInRaw(level, title) {
     credentials: 'include' // 若需要带 cookie/会话，保留；不需要可移除
   });
   if (!res.ok) {
-      const text = await res.text().catch(()=>'');
+    const text = await res.text().catch(() => '');
     throw new Error(`保存失败(${res.status}): ${text}`);
   }
-    return res.json().catch(()=> ({}));
-  }
+  return res.json().catch(() => ({}));
+}
 
 
 
@@ -642,8 +650,8 @@ function sanitizeHeadingsBeyondFirst(text = "") {
 
 
 
-  // 保存某个步骤的更新
-  async function saveUpdatedStep() {
+// 保存某个步骤的更新
+async function saveUpdatedStep() {
   const lEditor = document.getElementById('editor-lesson');
   const pEditor = document.getElementById('editor-prompt');
   const sEditor = document.getElementById('editor-score');
@@ -651,7 +659,7 @@ function sanitizeHeadingsBeyondFirst(text = "") {
 
   if (!check.ok) {
     alert("保存被阻止：" + check.report);
-        return ;
+    return;
   }
 
   // 获取原始的文档内容
@@ -707,10 +715,10 @@ function sanitizeHeadingsBeyondFirst(text = "") {
   btn.innerText = ClearModifiedStat(btn.innerText)
   btn = document.getElementById("tab-btn-score");
   btn.innerText = ClearModifiedStat(btn.innerText)
-  }
+}
 
-  // 更新对应步骤的内容
-  function updateMarkdownContent(parsed, phaseText, stepText, newContent) {
+// 更新对应步骤的内容
+function updateMarkdownContent(parsed, phaseText, stepText, newContent) {
   const phaseIndex = parsed.tokens.findIndex(token => token.level === 2 && token.text === phaseText);
   if (phaseIndex === -1) return parsed.lines.join('\n'); // 找不到阶段
 
@@ -730,14 +738,14 @@ function sanitizeHeadingsBeyondFirst(text = "") {
   lines.splice(startLine, endLine - startLine + 1, newContent); // 用新内容替换
 
   return lines.join('\n'); // 返回更新后的完整内容
-  }
+}
 
 // 获取所有 textarea
-function AddModifiedStat(str){
+function AddModifiedStat(str) {
   return str.charAt(str.length - 1) !== '*' ? str + '*' : str;
 }
-function ClearModifiedStat(str){
-  return str.charAt(str.length - 1) !== '*' ? str:str.slice(0, str.length-1);
+function ClearModifiedStat(str) {
+  return str.charAt(str.length - 1) !== '*' ? str : str.slice(0, str.length - 1);
 }
 function ValidTextareaNoBlankHead(textarea) {
   let lines = textarea.value.split("\n");
@@ -753,25 +761,25 @@ const PREFIX = "### ";
 // 记录每个 textarea 最新的“标题内容”（不含前缀）
 const lastTitleMap = new Map();
 
-  // 防止循环触发
-  let isProgrammaticUpdate = false;
-  function getFirstLine(text) {
+// 防止循环触发
+let isProgrammaticUpdate = false;
+function getFirstLine(text) {
   const idx = text.indexOf("\n");
   return idx === -1 ? text : text.slice(0, idx);
-  }
-  function setFirstLine(text, newFirstLine) {
+}
+function setFirstLine(text, newFirstLine) {
   const idx = text.indexOf("\n");
   return idx === -1 ? newFirstLine : newFirstLine + text.slice(idx);
-  }
-  // 工具：规范化首行 -> 始终以 '### ' 开头，并返回 { line, title }
-  function normalizeFirstLine(line) {
+}
+// 工具：规范化首行 -> 始终以 '### ' 开头，并返回 { line, title }
+function normalizeFirstLine(line) {
   // 去掉前导的 # 和空格，保留后面的标题内容
-    const title = line.replace(/^#+\s*/,''); // 如果用户没写#，也直接当作标题
+  const title = line.replace(/^#+\s*/, ''); // 如果用户没写#，也直接当作标题
   const normalized = PREFIX + title;
   return { line: normalized, title };
-  }
-    // 初始化 lastTitleMap（把当前值规范化一次）
-  editorsDoc.forEach(ed => {
+}
+// 初始化 lastTitleMap（把当前值规范化一次）
+editorsDoc.forEach(ed => {
   const rawFirst = getFirstLine(ed.value || "");
   const { line, title } = normalizeFirstLine(rawFirst);
   if (line !== rawFirst) {
@@ -780,9 +788,9 @@ const lastTitleMap = new Map();
     isProgrammaticUpdate = false;
   }
   lastTitleMap.set(ed, title);
-  });
-    // 同步到其他两个 textarea 的首行
-  function syncOthers(sourceEditor, newTitle) {
+});
+// 同步到其他两个 textarea 的首行
+function syncOthers(sourceEditor, newTitle) {
   isProgrammaticUpdate = true;
   try {
     editorsDoc.forEach(ed => {
@@ -798,7 +806,7 @@ const lastTitleMap = new Map();
   } finally {
     isProgrammaticUpdate = false;
   }
-  }
+}
 
 // ==== 前置：你的三编辑器实例与 id 映射（按你实际为准）====
 const ID_LESSON = 'editor-lesson';
@@ -1018,12 +1026,12 @@ function loadStepToEditors(phaseText, stepText) {
   editors['editor-prompt'].value(pText);
   editors['editor-score'].value(sText);
 
-  CURRENT.active={ //保存打开时的三个文本
-    phase:phaseText,
-    step:stepText,
-    lesson:lText,
-    prompt:pText,
-    score:sText
+  CURRENT.active = { //保存打开时的三个文本
+    phase: phaseText,
+    step: stepText,
+    lesson: lText,
+    prompt: pText,
+    score: sText
   }
   let btn = document.getElementById("tab-btn-lesson");
   btn.innerText = ClearModifiedStat(btn.innerText)
@@ -1045,9 +1053,9 @@ document.addEventListener('click', (e) => {
 
     // 广播 tab 变更（告诉别人当前激活的 tab id / 以及要用哪个 editorId）
     const editorIdMap = {
-      'tab-lesson' : 'editor-lesson',
-      'tab-prompt' : 'editor-prompt',
-      'tab-score'  : 'editor-score',
+      'tab-lesson': 'editor-lesson',
+      'tab-prompt': 'editor-prompt',
+      'tab-score': 'editor-score',
     };
     const activeBtnId = e.target.id; // 如 'tab-btn-lesson'
     const editorId =
@@ -1061,8 +1069,8 @@ document.addEventListener('click', (e) => {
   }
 });
 
-  // 保存全部：将三个编辑器中的文本保存回相应的 markdown 文件
-  document.getElementById('save-all-btn')?.addEventListener('click', async () => {
+// 保存全部：将三个编辑器中的文本保存回相应的 markdown 文件
+document.getElementById('save-all-btn')?.addEventListener('click', async () => {
 
   try {
     // 将各自的步骤更新保存回文件
@@ -1070,10 +1078,10 @@ document.addEventListener('click', (e) => {
   } catch (err) {
     console.error('保存错误:', err);
   }
-  });
+});
 
 
-  const STEP_TEMPLATES = {
+const STEP_TEMPLATES = {
   lesson: `在这里编写本步骤的课程内容...`,
   prompt: `#### 指令
   请严格遵循本步骤的教学目标，输出所需内容。
@@ -1093,8 +1101,8 @@ document.addEventListener('click', (e) => {
   #### 打分
   请输出 JSON：
   {"score": 0-100, "reasons": ["...","..."]}`
-  };
-  const PHASE_TEMPLATES = {
+};
+const PHASE_TEMPLATES = {
   lesson: `### 新步骤
     本阶段描述：请在此补充阶段说明。
   
@@ -1112,7 +1120,7 @@ document.addEventListener('click', (e) => {
   - 维度A：...
   - 维度B：...
   `
-  };
+};
 
 
 
@@ -1174,7 +1182,7 @@ function buildGlobalStepIndex(lines, tokens) {
   const phases = tokens.filter(t => t.level === 2);
   for (let i = 0; i < phases.length; i++) {
     const ph = phases[i];
-    const phNextStart = (i + 1 < phases.length) ? phases[i+1].start : lines.length;
+    const phNextStart = (i + 1 < phases.length) ? phases[i + 1].start : lines.length;
     // 该阶段内的所有 ###：
     const steps = tokens.filter(t => t.level === 3 && t.start > ph.start && t.start < phNextStart);
     for (const st of steps) {
@@ -1186,7 +1194,7 @@ function buildGlobalStepIndex(lines, tokens) {
 }
 
 
-  // ===== 选择器与小工具 =====
+// ===== 选择器与小工具 =====
 const treeEl = document.getElementById('outline-tree');
 const toggleOutlineBtn = document.getElementById('toggle-outline-reorder');
 

Html/apps/templates/index.html

@@ -1,5 +1,6 @@
 <!DOCTYPE html>
 <html lang="zh">
+
 <head>
     <meta charset="UTF-8">
     <title>课程选择主页</title>
@@ -12,6 +13,7 @@
     <script src="/static/cdnback/js/bootstrap.bundle.min.js"></script>
     <link rel="stylesheet" href="/static/css/index.css">
 </head>
+
 <body>
     {% include 'navbar.html' %}
 
@@ -51,8 +53,7 @@
 
                 <div class="col-md-6 col-lg-4">
                     <div class="course-card card h-100" onclick="openCourseProgress('{{course._id}}')">
-                        <img src="{{course.image_url}}"
-                            class="course-img" alt="课程封面">
+                        <img src="{{course.image_url}}" class="course-img" alt="课程封面">
                         <div class="card-body d-flex flex-column">
                             <span class="course-category">算法设计</span>
                             <h5 class="course-title">{{course.name}}</h5>
@@ -62,11 +63,15 @@
                                 <span class="course-rating"><i class="fas fa-star"></i> 4.7</span>
                             </div>
                             <div class="mt-auto d-grid gap-2 d-md-flex">
-                                <button class="btn btn-view flex-fill" onclick="btn_view(event,'{{course._id}}')"><i class="far fa-eye me-1"></i> 课程</button>
+                                <button class="btn btn-view flex-fill" onclick="btn_view(event,'{{course._id}}')"><i
+                                        class="far fa-eye me-1"></i> 课程</button>
                                 {% if course._id in selected_courses %}
-                                    <button class="btn btn-process flex-fill selected-button"  data-course-id="{{course._id}}">已选课</button>
+                                <button class="btn btn-process flex-fill selected-button"
+                                    data-course-id="{{course._id}}">已选课</button>
                                 {% else %}
-                                    <button class="btn btn-process flex-fill select-button" onclick="on_click_select_course(event)" data-course-id="{{course._id}}">选择课程</button>
+                                <button class="btn btn-process flex-fill select-button"
+                                    onclick="on_click_select_course(event)"
+                                    data-course-id="{{course._id}}">选择课程</button>
                                 {% endif %}
 
                             </div>
@@ -88,5 +93,6 @@
     }
 </script>
 <script src="/static/js/index.js"></script>
-</html>
+<script src="/static/js/dashboard.js"></script>
 
+</html>

code-server-like/app/__init__.py

@@ -1,5 +1,32 @@
 import eventlet
-eventlet.monkey_patch()  # 进行猴子补丁操作
+import logging
+
+# 配置 eventlet 日志，抑制 IOClosed 等错误日志
+logging.getLogger('eventlet.hubs').setLevel(logging.CRITICAL)
+logging.getLogger('eventlet.greenio').setLevel(logging.CRITICAL)
+
+# 进行猴子补丁操作
+eventlet.monkey_patch()
+
+# 配置 eventlet hub 以更优雅地处理 IOClosed 错误
+try:
+    from eventlet.hubs import hub
+    # 保存原始的 handle_error 方法
+    original_handle_error = hub.Hub.handle_error
+    
+    def custom_handle_error(self, context, type, value, tb):
+        # 忽略 IOClosed 错误
+        if type.__name__ == 'IOClosed' and 'Operation on closed file' in str(value):
+            return
+        # 其他错误调用原始方法
+        original_handle_error(self, context, type, value, tb)
+    
+    # 替换原始方法
+    hub.Hub.handle_error = custom_handle_error
+except Exception as e:
+    # 如果修改失败，忽略错误
+    pass
+
 from flask import Flask
 from .views.routes import main_bp
 from .views.file import file_bp

code-server-like/app/sockets/terminal_service.py

@@ -29,8 +29,12 @@ terminal_bp = Blueprint('terminal', __name__, url_prefix='/vsc-like')
 
 
 def set_winsize(fd, row, col, xpix=0, ypix=0):
+    try:
         winsize = struct.pack("HHHH", row, col, xpix, ypix)
         fcntl.ioctl(fd, termios.TIOCSWINSZ, winsize)
+    except (OSError, IOError):
+        # File descriptor closed or invalid, do nothing
+        pass
 
 
 def read_and_forward_pty_output(fd=None, pid=None, room_id=None,namespace=None):
@@ -67,21 +71,35 @@ def read_and_forward_pty_output(fd=None, pid=None, room_id=None,namespace=None):
                 return
             if fd:
                 timeout_sec = 0
+                try:
+                    # Check if file descriptor is still valid by trying to select on it
                     (data_ready, _, _) = select.select([fd], [], [], timeout_sec)
                     if data_ready:
-                    # output = os.read(fd, max_read_bytes).decode('ascii')
                         timeout=0.1
                         try:
                             output = os.read(fd, max_read_bytes).decode()
-                    except Exception as err:
+                        except (OSError, IOError, EOFError) as err:
+                            # File descriptor closed or other IO error, exit gracefully
+                            return
+                        except UnicodeDecodeError as err:
                             output = """
                             ***AQUI WEB TERM ERR***
-                        {}
+                            Unicode decode error: {}
                             ***********************
                             """.format(err)
                         # the key for different visitor to get different terminal (instead of mixing up)
                         # is to let the background task push pty response to each one's own (default) ROOM!
+                        try:
                             namespace.emit("pty_output", {"output": output}, room=room_id)
+                        except Exception:
+                            # If emit fails, the client is probably disconnected, exit
+                            return
+                except (OSError, IOError) as err:
+                    # File descriptor closed or invalid, exit gracefully
+                    return
+    except Exception as e:
+        # Catch any other unexpected exceptions to prevent server crash
+        pass
     finally:
         # Clean up file descriptor if it's open
         if fd:
@@ -158,7 +176,13 @@ class VSCLikeNameSpace(Namespace):
         if fd:
             # print("writing to ptd: %s" % data["input"])
             # os.write(fd, data["input"].encode('ascii'))
+            try:
                 os.write(fd, data["input"].encode())
+            except (OSError, IOError):
+                # File descriptor closed or invalid, clean up
+                disconnect()
+                session['terminal_config'] = TERM_INIT_CONFIG
+                return
 
     
     def on_resize(self, data):
@@ -174,10 +198,29 @@ class VSCLikeNameSpace(Namespace):
             return
         fd = session.get('terminal_config').get('fd')
         if fd:
+            # 检查文件描述符是否有效
+            try:
+                # 尝试一个简单的操作来检查文件描述符是否有效
+                os.fstat(fd)
                 set_winsize(fd, data["rows"], data["cols"])
+            except (OSError, IOError):
+                # 文件描述符无效，清理资源
+                disconnect()
+                session['terminal_config'] = TERM_INIT_CONFIG
+                return
 
     def on_disconnect(self):
-        child_pid = session.get('terminal_config', {}).get('child_pid')
+        terminal_config = session.get('terminal_config', {})
+        child_pid = terminal_config.get('child_pid')
+        fd = terminal_config.get('fd')
+        
+        # 先关闭文件描述符，避免其他操作尝试使用无效的文件描述符
+        if fd:
+            try:
+                os.close(fd)
+            except Exception:
+                pass
+        
         if child_pid:
             try:
                 child_process = psutil.Process(child_pid)
@@ -196,21 +239,14 @@ class VSCLikeNameSpace(Namespace):
                     pass
             except psutil.TimeoutExpired:
                 # If process didn't terminate in time, kill it forcefully
-                child_process.kill()
                 try:
+                    child_process.kill()
                     child_process.wait(timeout=1)
                 except Exception:
                     pass
             except Exception as err:
                 current_app.logger.error(f'Error terminating process: {err}')
-            finally:
-                # Close the file descriptor if it's open
-                fd = session.get('terminal_config', {}).get('fd')
-                if fd:
-                    try:
-                        os.close(fd)
-                    except Exception:
-                        pass
+        
         # Reset session config
         session['terminal_config'] = TERM_INIT_CONFIG
         current_app.logger.debug('Client disconnected')

code-server-like/run.py

@@ -1,12 +1,32 @@
 from app import create_app
 from app.extensions import socketio
+import logging
+
+# 配置日志，减少eventlet的调试日志
+logging.getLogger('eventlet').setLevel(logging.ERROR)
+logging.getLogger('socketio').setLevel(logging.ERROR)
+logging.getLogger('werkzeug').setLevel(logging.ERROR)
+
 app = create_app()
 
 if __name__ == '__main__':
+    try:
         socketio.run(
             app,
             host="0.0.0.0",
             port=5200,
             debug=False,                # 开发期打开
             allow_unsafe_werkzeug=True, # 避免 dev server 的安全限制提示
+            log_output=False            # 禁用详细输出
         )
+    except KeyboardInterrupt:
+        print("Server stopped by user")
+    except Exception as e:
+        # 捕获所有异常，包括 eventlet 内部的 IOClosed 错误
+        if "IOClosed" in str(type(e).__name__) or "Operation on closed file" in str(e):
+            # 优雅处理 eventlet 关闭文件的错误
+            print("Eventlet IOClosed error handled gracefully")
+        else:
+            # 其他异常仍然打印
+            import traceback
+            traceback.print_exc()