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+---
+name: wechat-article-extraction
+description: Extract full article content from WeChat public account (微信公众号) articles at mp.weixin.qq.com. Plain requests with desktop UA works; all "smarter" tools fail.
+version: 1.0
+tags: [wechat, scraping, article, chinese]
+---
+
+# WeChat Article Extraction (mp.weixin.qq.com)
+
+Extract full article content from WeChat public account (微信公众号) articles.
+
+## What Works
+
+**Plain `requests` with desktop Chrome User-Agent.** The full article HTML is server-rendered and included in the initial response — no JS rendering needed.
+
+```python
+import requests, re, html
+
+session = requests.Session()
+headers = {
+    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36',
+    'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8',
+    'Accept-Language': 'zh-CN,zh;q=0.9,en;q=0.8',
+}
+resp = session.get(url, headers=headers, timeout=20)
+content = resp.text
+
+# Title
+title = re.search(r'var\s+msg_title\s*=\s*["\'](.+?)["\']', content)
+title_text = html.unescape(title.group(1)) if title else None
+
+# Article body
+body = re.search(r'id="js_content"[^>]*>(.*?)</div>', content, re.DOTALL)
+text = re.sub(r'<[^>]+>', '\n', body.group(1))
+text = html.unescape(text)
+text = re.sub(r'\n{3,}', '\n\n', text).strip()
+```
+
+## What Does NOT Work
+
+| Tool | Result | Reason |
+|------|--------|--------|
+| Jina Reader (`r.jina.ai`) | ❌ CAPTCHA block | Detected as bot, returns "环境异常" |
+| Crawl4AI (Playwright) | ❌ Timeout | Anti-bot blocks `js_content` selector from appearing |
+| Browser automation | ❌ Sandbox/CAPTCHA | Chrome sandbox issues + verification wall |
+| Google Cache | ❌ No cache | Google hasn't cached most WeChat articles |
+| Mobile UA (MicroMessenger) | ❌ Empty content | Triggers anti-bot, content hidden behind JS |
+| SerpAPI search | ❌ No results | WeChat articles rarely indexed |
+
+## Extraction Strategy (Two Patterns)
+
+WeChat articles come in two rendering variants. Try **Pattern 1** first, fall back to **Pattern 2**.
+
+### Pattern 1: Server-rendered HTML (`js_content` div)
+
+Most common. The full article HTML is in `<div id="js_content">...</div>`.
+
+```python
+body = re.search(r'id="js_content"[^>]*>(.*?)</div>', content, re.DOTALL)
+if body and body.group(1).strip():
+    text = re.sub(r'<br\s*/?>', '\n', body.group(1))
+    text = re.sub(r'<p[^>]*>', '\n', text)
+    text = re.sub(r'</p>', '', text)
+    text = re.sub(r'<[^>]+>', '', text)
+    text = html.unescape(text)
+```
+
+### Pattern 2: JS-string embedded (`window.msg_title`)
+
+Some shorter articles embed the ENTIRE content inside a JS string assignment.
+The `<div id="js_content">` is empty — content is populated dynamically by JS.
+The article text lives in `window.msg_title = '...'` with `\\n` for newlines
+and `\\'` for escaped quotes.
+
+```python
+# Try Pattern 2 when js_content is empty
+title_match = re.search(r"window\.msg_title\s*=\s*window\.title\s*=\s*'(.+?)'\s*\|\|\s*", content, re.S)
+if not title_match:
+    title_match = re.search(r"window\.msg_title\s*=\s*window\.title\s*=\s*'(.+?)';(?:\s*$|\s*\n)", content, re.S)
+if title_match:
+    article = title_match.group(1).replace('\\n', '\n').replace("\\'", "'").replace('\\\\', '\\')
+    # First line is the title, rest is body
+    lines = article.strip().split('\n')
+    title = lines[0]
+    body = '\n'.join(lines[1:])
+```
+
+The `msg_title` variable is also the source of the `<title>` tag — it's a single JS string
+that contains the full article text. The regex MUST use `'` (single quotes) because WeChat
+uses single-quoted JS strings for this value.
+
+## Key Patterns
+
+- **Title**: `var msg_title = "...";` — HTML-escaped, use `html.unescape()`
+- **Description**: `var msg_desc = "...";`
+- **Body (Pattern 1)**: `<div id="js_content">...</div>` — server-rendered HTML with inline tags
+- **Body (Pattern 2)**: `window.msg_title = '...\\n...';` — JS-embedded, `\\n` for newlines
+- **Images**: `data-src` attribute (not `src`) — WeChat lazy-loads images
+- **Author**: `var nickname = "...";` in JS
+
+## Pitfalls
+
+- **Desktop UA is critical** — mobile/bot user agents trigger the verification wall even with `requests`
+- **Pattern 2: `js_content` div exists but is empty** — don't assume failure; check `window.msg_title` as fallback
+- **Pattern 2: use single quotes in regex** — WeChat uses `'...'` not `"..."` for `msg_title` JS strings
+- **Pattern 2: `\\n` not `\n`** — the JS string literal has escaped newlines; use `.replace('\\n', '\n')`
+- **Image URLs need transformation** — `data-src` values are relative (`//mmbiz.qpic.cn/...`), prepend `https:`
+- **Don't over-engineer** — sophisticated tools (Crawl4AI, CamouFox) are overkill and actually worse for WeChat articles
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