从 Ollama 到云端：Hexo AI 摘要的多平台进化之路

之前我写了《使用 Ollama 为 Hexo 博客部署 AI 文章摘要》，介绍了本地部署大模型生成摘要的方案。运行一段时间后，发现几个问题：3B 模型效果一般，更大的模型又吃资源；生成速度慢，用户体验不佳；服务器配置有限，经常卡顿。于是，我重新设计了一套架构：保留前端交互，后端加入代理层，支持多个云端 API，并用 Redis 缓存加速。本文分享这个升级过程。

Ollama 方案的局限

之前的架构：

前端 JS → Ollama API (本地 11434 端口)

遇到的问题：

问题	说明
模型效果	qwen2.5:3b 摘要质量一般，7b 又太慢
资源占用	8G 内存服务器，跑模型容易卡死
生成速度	本地生成一次摘要要 5-20 秒
维护成本	需要定期更新模型，管理模型文件

新架构设计

升级后的架构：

前端 JS → Nginx → Node.js 代理 → Redis 缓存 / 云端 API
              ↑
         静态文件 (Hexo)

核心变化：

加入代理层：前端不再直接调 AI API，而是通过代理转发
支持多平台：日日新、DeepSeek、Ollama 自由切换
Redis 缓存：相同文章直接返回缓存，不重复调用 API
Key 安全：API Key 放在服务器，前端不可见

部署

Docker拉起Redis(容器编排)

# 创建目录
mkdir -p /opt/redis/data
cd /opt/redis

# 创建 docker-compose.yml
cat > docker-compose.yml << 'EOF'
version: '3.8'
services:
  redis:
    image: redis:7-alpine
    container_name: redis-ai
    restart: always
    ports:
      - "127.0.0.1:6379:6379"
    volumes:
      - /var/lib/docker//redis:/data
    command: redis-server --appendonly yes
EOF

# 启动
docker-compose up -d

# 验证
docker exec redis-ai redis-cli ping

部署AI代理

# 创建目录
mkdir -p /opt/ai-proxy
cd /opt/ai-proxy

# 初始化
npm init -y
npm install express node-fetch ioredis

# 创建 index.js（代理代码）

# 启动
pm2 start index.js --name ai-proxy
pm2 save
pm2 startup

const express = require('express');
const fetch = require('node-fetch');
const Redis = require('ioredis');
const crypto = require('crypto');

const app = express();

// Redis 连接
const redis = new Redis({
  host: '127.0.0.1',
  port: 6379,
  db: 0
});

redis.on('connect', () => console.log('[Redis] Connected'));
redis.on('error', (err) => console.error('[Redis] Error:', err));

// 缓存时间：7天（秒）
const CACHE_TTL = 7 * 24 * 60 * 60;

// 只用内容哈希生成缓存 key
function getCacheKey(text) {
  const contentHash = crypto.createHash('md5').update(text.slice(0, 4000)).digest('hex').substring(0, 16);
  return `ai:summary:${contentHash}`;
}

app.use(express.json());

app.use((req, res, next) => {
  const allowedOrigins = ['https://blog.mingliangstar.com'];
  const origin = req.headers.origin;
  
  if (allowedOrigins.includes(origin)) {
    res.header('Access-Control-Allow-Origin', origin);
  }
  
  res.header('Access-Control-Allow-Methods', 'POST, OPTIONS');
  res.header('Access-Control-Allow-Headers', 'Content-Type, Authorization');
  
  if (req.method === 'OPTIONS') return res.sendStatus(200);
  next();
});

app.post('/api/ai-summary', async (req, res) => {
  const { text } = req.body || {};
  
  if (!text || text.length < 50) {
    return res.status(400).json({ error: 'Text too short' });
  }
  
  const cacheKey = getCacheKey(text);
  
  try {
    // 1. 查 Redis 缓存
    const cached = await redis.get(cacheKey);
    if (cached) {
      console.log('[Cache] Hit:', cacheKey);
      return res.json({ summary: cached, cached: true });
    }
    
    console.log('[Cache] Miss:', cacheKey);
    
    // 2. 调日日新 API
    const response = await fetch('https://token.sensenova.cn/v1/chat/completions', {
      method: 'POST',
      headers: {
        'Authorization': 'Bearer 输入自己的key',
        'Content-Type': 'application/json'
      },
      body: JSON.stringify({
        model: 'deepseek-v4-flash',
        messages: [
          {
            role: 'system',
            content: '请为以下文章生成一段简洁的摘要，突出核心内容。'
          },
          {
            role: 'user',
            content: text.slice(0, 4000)
          }
        ],
        max_tokens: 200,
        temperature: 0.3
      })
    });
    
    if (!response.ok) {
      const error = await response.text();
      return res.status(response.status).json({ error });
    }
    
    const data = await response.json();
    const summary = data.choices?.[0]?.message?.content?.trim();
    
    if (!summary) {
      return res.status(500).json({ error: 'Empty summary' });
    }
    
    // 3. 写入 Redis 缓存
    await redis.setex(cacheKey, CACHE_TTL, summary);
    console.log('[Cache] Saved:', cacheKey);
    
    res.json({ summary, cached: false });
    
  } catch (err) {
    console.error('[AI Proxy] Error:', err.message);
    res.status(500).json({ error: err.message });
  }
});

const PORT = 3000;
app.listen(PORT, '127.0.0.1', () => {
  console.log(`AI Proxy running on http://127.0.0.1:${PORT}`);
});

Nginx反向代理

这里直接再宝塔面板中配置

前端集成

这里不在做过多缀述，参考之前的文章即可，但是需要修改ai-summary.js代码

使用 Ollama 为 Hexo 博客部署 AI 文章摘要 | Eucalyptus

/**
 * 安知鱼主题 AI 摘要 - 代理版（无前端缓存）
 */
(function() {
  'use strict';

  const CONFIG = {
    apiUrl: 'https://ai.mingliangstar.com/api/ai-summary',
    typeSpeed: 35,
    maxSummaryLength: 1000,
    retryCount: 1
  };

  let isProcessing = false;
  let typeWriterTimer = null;
  let abortController = null;

  function waitForElement(selector, timeout = 3000) {
    return new Promise((resolve, reject) => {
      const element = document.querySelector(selector);
      if (element) return resolve(element);
      const observer = new MutationObserver(() => {
        const el = document.querySelector(selector);
        if (el) { observer.disconnect(); resolve(el); }
      });
      observer.observe(document.body, { childList: true, subtree: true });
      setTimeout(() => { observer.disconnect(); reject(new Error(`Timeout waiting for ${selector}`)); }, timeout);
    });
  }

  function escapeHtml(text) {
    if (!text) return '';
    const div = document.createElement('div');
    div.textContent = text;
    return div.innerHTML;
  }

  function typeWriter(element, text, speed = CONFIG.typeSpeed) {
    return new Promise((resolve) => {
      if (typeWriterTimer) { clearInterval(typeWriterTimer); typeWriterTimer = null; }
      let index = 0;
      element.textContent = '';
      typeWriterTimer = setInterval(() => {
        if (index < text.length) { 
          element.textContent += text.charAt(index); 
          index++; 
        } else { 
          clearInterval(typeWriterTimer); 
          typeWriterTimer = null; 
          resolve(); 
        }
      }, speed);
    });
  }

  function getArticleText() {
    const selectors = [
      '#article-container .post-content',
      '#article-container #post',
      '.post-content',
      'article .entry-content',
      '#post-content',
      '.article-content',
      '.markdown-body',
      '#content article'
    ];

    let article = null;
    for (const sel of selectors) {
      article = document.querySelector(sel);
      if (article && article.innerText.trim().length > 200) break;
    }

    if (!article) { 
      console.warn('[AI Summary] Article content not found.'); 
      return ''; 
    }

    const clone = article.cloneNode(true);

    const removeSelectors = [
      'h1', 'h2.post-title', '.post-title', '.page-title',
      '.post-meta', '.meta', '.entry-meta', '.article-meta',
      '.post-date', '.post-time', '.published', '.updated',
      '.author', '.byline', '.post-author',
      '.post-tags', '.tags', '.tag-cloud', '.post-categories',
      '.categories', '.post-category', '.article-tags',
      'nav', '.nav', '.breadcrumb', '.crumbs',
            'aside', '.sidebar', '.widget', '.toc', '#toc',
            'header', '.post-header', '.entry-header', '.article-header',
            'footer', '.post-footer', '.entry-footer', '.article-footer',
            '#post-comment', '.comments', '.comment-area',
            '.share', '.social-share', '.reward', '.donate',
            '.post-copyright', '.copyright', '.license', '.declaration',
            '.relatedPosts', '.related-posts', '.related', '.recommend',
            '.anzhiyu-ai-summary', '#ai-summary',
            'script', 'style', 'pre', 'code', 'table', 
            'img', 'figure', 'figcaption', 'svg',
            'blockquote',
            '.ads-wrap', '.ad', '.advertisement',
            '.highlight', '.mermaid', '.katex', '.mathjax',
            '.pagination', '.pager', '.page-nav',
            '.notice', '.alert', '.tips', '.warning'
        ];
        
        removeSelectors.forEach(sel => {
            clone.querySelectorAll(sel).forEach(el => el.remove());
        });
        
        let text = clone.innerText
            .replace(/\s+/g, ' ')
            .replace(/[*#\-_`~\[\]()>|]/g, ' ')
            .replace(/\b[A-Z]{5,}\b/g, ' ')
            .replace(/\d{4}[年/-]\d{1,2}[月/-]\d{1,2}[日]?/g, ' ')
            .replace(/[^\u4e00-\u9fa5a-zA-Z0-9，。！？；：""''（）【】《》.,;:!?'"()\[\]<>、\-—\n]/g, ' ')
            .replace(/\s+/g, ' ')
            .trim();
        
        if (text.length < 100) {
            console.warn('[AI Summary] Content too short, trying fallback...');
            const paragraphs = Array.from(document.querySelectorAll('p'));
            const longestP = paragraphs
                .filter(p => {
                    const t = p.innerText.trim();
                    return t.length > 50 && !t.includes('标签') && !t.includes('分类') && !t.includes('作者');
                })
                .sort((a, b) => b.innerText.length - a.innerText.length)
                .slice(0, 10);
            
            if (longestP.length > 0) {
                text = longestP.map(p => p.innerText).join(' ');
                text = text.replace(/\s+/g, ' ').trim();
            }
        }
        
        return text;
    }

    async function callSummaryAPI(text, retry = 0) {
        if (abortController) abortController.abort();
        abortController = new AbortController();
        const timeoutId = setTimeout(() => abortController.abort(), 120000);
        
        try {
            const response = await fetch(CONFIG.apiUrl, {
                method: 'POST',
                headers: { 
                    'Content-Type': 'application/json'
                },
                body: JSON.stringify({
                    text: text.slice(0, 4000)
                }),
                signal: abortController.signal
            });
            
            clearTimeout(timeoutId);
            
            if (!response.ok) {
                const errorText = await response.text();
                throw new Error(`HTTP ${response.status}: ${errorText}`);
            }
            
            const data = await response.json();
            let summary = data.summary || '';
            
            if (!summary) throw new Error('Empty response');
            
            summary = summary
                .replace(/^\s*(摘要|总结|概括)[：:]\s*/i, '')
                .replace(/^\s*["']?|["']?\s*$/g, '')
                .replace(/\*\*/g, '')
                .replace(/^\s*[-*]\s+/gm, '')
                .replace(/^#{1,6}\s+/gm, '')
                .replace(/这篇文章主要(介绍|讲述|讨论|分析)了/g, '本文介绍了')
                .replace(/本文主要(介绍|讲述|讨论|分析)了/g, '本文介绍了')
                .replace(/该文章(介绍|讲述|讨论|分析)了/g, '本文介绍了')
                .replace(/此文章(介绍|讲述|讨论|分析)了/g, '本文介绍了')
                .replace(/综上所述[，。]/g, '')
                .replace(/总之[，。]/g, '')
                .replace(/总而言之[，。]/g, '')
                .trim();

            if (!/^本文(主要)?介绍了/.test(summary)) {
                summary = '本文介绍了' + summary.replace(/^[，。！？\s]+/, '');
            }

            const sentences = summary.split(/[。！？.!?]/).filter(s => s.trim());
            if (sentences.length > 3) {
                summary = sentences.slice(0, 3).join('。') + '。';
            }
            
            if (summary.length > CONFIG.maxSummaryLength) {
                summary = summary.slice(0, CONFIG.maxSummaryLength);
                const lastPunct = Math.max(
                    summary.lastIndexOf('。'),
                    summary.lastIndexOf('！'),
                    summary.lastIndexOf('？')
                );
                if (lastPunct > CONFIG.maxSummaryLength * 0.7) {
                    summary = summary.slice(0, lastPunct + 1);
                } else {
                    summary = summary.replace(/[^。！？]*$/, '') + '。';
                }
            }
            
            if (!/[。！？.!?]$/.test(summary)) {
                summary += '。';
            }
            
            return summary;
            
        } catch (err) {
            clearTimeout(timeoutId);
            if (retry < CONFIG.retryCount) {
                console.log(`[AI Summary] Retrying... (${retry + 1}/${CONFIG.retryCount})`);
                await new Promise(r => setTimeout(r, 2000));
                return callSummaryAPI(text, retry + 1);
            }
            throw err;
        }
    }

    function renderContainer(targetContainer, isLoading = false, content = '') {
        if (!targetContainer) return null;
        
        const loadingHtml = `
            <span class="ai-loading-inline">
                <svg class="ai-loading-svg" width="16" height="16" viewBox="0 0 50 50">
                    <circle cx="25" cy="25" r="20" fill="none" stroke="currentColor" stroke-width="3" 
                        stroke-linecap="round" stroke-dasharray="80" stroke-dashoffset="60">
                        <animateTransform attributeName="transform" type="rotate" from="0 25 25" to="360 25 25" dur="1s" repeatCount="indefinite"/>
                    </circle>
                </svg>
                <span class="ai-loading-dots">AI 正在分析文章</span>
            </span>
        `;
        
        targetContainer.innerHTML = `
            <div class="ai-content">
                <div class="ai-header">
                    <i class="eucalyptus icon-bilibili"></i><span class="ai-titles">AI 摘要</span><span class="ai-badge">AGENT</span>
                </div>
                <div class="ai-text-box">
                    <p id="ai-summary-text">${isLoading ? loadingHtml : escapeHtml(content)}</p>
                </div>
            </div>
        `;
        return targetContainer.querySelector('#ai-summary-text');
    }

    function renderError(targetContainer, message) {
        if (!targetContainer) return;
        targetContainer.innerHTML = `
            <div class="ai-content">
                <div class="ai-header">
                    <i class="eucalyptus icon-bilibili"></i><span class="ai-titles">AI 摘要</span><span class="ai-badge">AGENT</span>
                </div>
                <div class="ai-text-box">
                    <p style="color: #999;">${escapeHtml(message)}</p>
                </div>
            </div>
        `;
    }

    function bootstrap() {
        if (abortController) {
            abortController.abort();
            abortController = null;
        }
        if (typeWriterTimer) { 
            clearInterval(typeWriterTimer); 
            typeWriterTimer = null; 
        }
        isProcessing = false;
        
        if (document.getElementById('ai-summary')) {
            setTimeout(initAISummary, 100);
        }
    }

    async function initAISummary() {
        if (isProcessing) return;
        isProcessing = true;
        
        try {
            const container = await waitForElement('#ai-summary');
            const text = getArticleText();
            
            if (!text || text.length < 50) {
                renderContainer(container, false, '本文篇幅较短，暂无详细摘要。');
                isProcessing = false;
                return;
            }
            
            renderContainer(container, true);
            
            let summary;
            try { 
                summary = await callSummaryAPI(text); 
            }
            catch (err) { 
                console.error('[AI Summary] API failed:', err); 
                renderError(container, `AI 服务暂时不可用：${err.message}`); 
                isProcessing = false; 
                return; 
            }
            
            const textEl = renderContainer(container, false, '');
            await typeWriter(textEl, summary);
            
        } catch (err) {
            console.error('[AI Summary] Init Error:', err);
            const container = document.getElementById('ai-summary');
            if (container) renderError(container, '初始化失败');
        } finally { 
            isProcessing = false; 
        }
    }

    if (document.readyState === 'loading') {
        document.addEventListener('DOMContentLoaded', bootstrap);
    } else {
        bootstrap();
    }

    document.addEventListener('pjax:complete', bootstrap);
    document.addEventListener('turbolinks:load', bootstrap);

    let lastUrl = location.pathname;
    new MutationObserver(() => { 
        const url = location.pathname; 
        if (url !== lastUrl) { 
            lastUrl = url; 
            bootstrap(); 
        } 
    }).observe(document, { subtree: true, childList: true });

})();

重新构建Hexo

hexo clean
hexo generate

查看Redis缓存

#查看所有 AI 摘要缓存
docker exec redis-ai redis-cli KEYS "ai:summary:*"

#查看缓存数量
docker exec redis-ai redis-cli DBSIZE

#查看某个缓存内容
docker exec redis-ai redis-cli GET "ai:summary:具体的hash值"

#查看缓存剩余过期时间（秒）
docker exec redis-ai redis-cli TTL "ai:summary:具体的hash值"

#查看缓存详细信息（长度、类型等）
docker exec redis-ai redis-cli DEBUG OBJECT "ai:summary:具体的hash值"

删除Redis缓存

#删除单个缓存
docker exec redis-ai redis-cli DEL "ai:summary:具体的hash值"

#批量删除所有 AI 摘要缓存
docker exec redis-ai redis-cli EVAL "return redis.call('del', unpack(redis.call('keys', 'ai:summary:*')))" 0

#删除所有缓存（慎用）
docker exec redis-ai redis-cli FLUSHDB

进入Redis CLI交互式模式

docker exec -it redis-ai redis-cli

# 然后可以执行各种命令
127.0.0.1:6379> KEYS ai:summary:*
127.0.0.1:6379> GET ai:summary:5bc22daf2d8a9026
127.0.0.1:6379> TTL ai:summary:5bc22daf2d8a9026
127.0.0.1:6379> DEL ai:summary:5bc22daf2d8a9026
127.0.0.1:6379> exit

效果对比

指标	Ollama (3b)	新方案 (日日新)
生成速度	5-10 秒	1-3 秒
摘要质量	一般	较好
资源占用	500MB-1GB 内存	20MB 内存
并发能力	单用户	多用户共享缓存
成本	免费	按 API 调用计费