wechat-article-extractor

# WeChat Article Extractor

Extract metadata and content from WeChat Official Account (微信公众号) articles.

## Capabilities

- Parse WeChat article URLs (`mp.weixin.qq.com`)
- Extract article metadata: title, author, description, publish time
- Extract account info: name, avatar, alias, description
- Get article content (HTML)
- Get cover image URL
- Support multiple article types: post, video, image, voice, text, repost
- Handle various error cases: deleted content, expired links, access limits

## Usage

### Basic Extraction from URL

```javascript
const { extract } = require('./scripts/extract.js');

const result = await extract('https://mp.weixin.qq.com/s?__biz=...');
// Returns: { done: true, code: 0, data: {...} }
```

### Extraction from HTML

```javascript
const html = await fetch(url).then(r => r.text());
const result = await extract(html, { url: sourceUrl });
```

### Options

```javascript
const result = await extract(url, {
  shouldReturnContent: true,      // Return HTML content (default: true)
  shouldReturnRawMeta: false,     // Return raw metadata (default: false)
  shouldFollowTransferLink: true, // Follow migrated account links (default: true)
  shouldExtractMpLinks: false,    // Extract embedded mp.weixin links (default: false)
  shouldExtractTags: false,       // Extract article tags (default: false)
  shouldExtractRepostMeta: false  // Extract repost source info (default: false)
});
```

## Response Format

### Success Response

```javascript
{
  done: true,
  code: 0,
  data: {
    // Account info
    account_name: "公众号名称",
    account_alias: "微信号",
    account_avatar: "头像URL",
    account_description: "功能介绍",
    account_id: "原始ID",
    account_biz: "biz参数",
    account_biz_number: 1234567890,
    account_qr_code: "二维码URL",

    // Article info
    msg_title: "文章标题",
    msg_desc: "文章摘要",
    msg_content: "HTML内容",
    msg_cover: "封面图URL",
    msg_author: "作者",
    msg_type: "post", // post|video|image|voice|text|repost
    msg_has_copyright: true,
    msg_publish_time: Date,
    msg_publish_time_str: "2024/01/15 10:30:00",

    // Link params
    msg_link: "文章链接",
    msg_source_url: "阅读原文链接",
    msg_sn: "sn参数",
    msg_mid: 1234567890,
    msg_idx: 1
  }
}
```

### Error Response

```javascript
{
  done: false,
  code: 1001,
  msg: "无法获取文章信息"
}
```

## Error Codes

| Code | Message | Description |
|------|---------|-------------|
| 1000 | 文章获取失败 | General failure |
| 1001 | 无法获取文章信息 | Missing title or publish time |
| 1002 | 请求失败 | HTTP request failed |
| 1003 | 响应为空 | Empty response |
| 1004 | 访问过于频繁 | Rate limited |
| 1005 | 脚本解析失败 | Script parsing error |
| 1006 | 公众号已迁移 | Account migrated |
| 2001 | 请提供文章内容或链接 | Missing input |
| 2002 | 链接已过期 | Link expired |
| 2003 | 内容涉嫌侵权 | Content removed (copyright) |
| 2004 | 无法获取迁移后的链接 | Migration link failed |
| 2005 | 内容已被发布者删除 | Content deleted by author |
| 2006 | 内容因违规无法查看 | Content blocked |
| 2007 | 内容发送失败 | Failed to send |
| 2008 | 系统出错 | System error |
| 2009 | 不支持的链接 | Unsupported URL |
| 2010 | 内容获取失败 | Content fetch failed |
| 2011 | 涉嫌过度营销 | Marketing/spam content |
| 2012 | 账号已被屏蔽 | Account blocked |
| 2013 | 账号已自主注销 | Account deleted |
| 2014 | 内容被投诉 | Content reported |
| 2015 | 账号处于迁移流程中 | Account migrating |
| 2016 | 冒名侵权 | Impersonation |

## Dependencies

Required npm packages:
- `cheerio` - HTML parsing
- `dayjs` - Date formatting
- `request-promise` - HTTP requests
- `qs` - Query string parsing
- `lodash.unescape` - HTML entities

## Notes

- Handles various WeChat page structures and anti-scraping measures
- Automatically detects article type from page content
- Supports extracting from Sogou WeChat search results (`weixin.sogou.com`)
- Some fields may be null depending on article type and page structure