huodongxing-qr

name	huodongxing-qr
description	Download WeChat mini-program QR codes from huodongxing.com for AI Breakfast events. Use when the organizer needs QR codes for event posters or sharing.
argument-hint	[event numbers, e.g. '32-38' or '40 41 42']
user-invocable	true
allowed-tools	["Bash","Read","Glob"]

Huodongxing QR Code Downloader

Download the circular WeChat mini-program QR codes (小程序二维码) for AI Breakfast events from huodongxing.com.

How It Works

Each event on huodongxing has a unique event ID. The WeChat mini-program QR code is hosted on their CDN at:

https://cdn.huodongxing.com/logo/YYYYMM/EVENT_ID/promoteMini.png

• The YYYYMM prefix is based on when the event was created (not the event date). For events created in batch, they typically share the same prefix.
• A Referer: https://www.huodongxing.com/ header is required or the CDN returns an error.
• The images are 400x400 PNG files with transparent background.

Step-by-Step Process

1. Find Event IDs

If event IDs are not already known, use agent-browser (headed mode) to look them up:

# Open the browser for user to login (WeChat QR or SMS verification required)
agent-browser --headed open https://www.huodongxing.com/login

# After user confirms login, navigate to organizer console
agent-browser open https://www.huodongxing.com/console/eventadmin

# IMPORTANT: Chinese websites often open links in new tabs.
# Always check for new tabs after clicking:
agent-browser tab

# Extract event IDs from the event list page
agent-browser eval "Array.from(document.querySelectorAll('a')).filter(a => a.textContent.includes('AI Breakfast')).map(a => ({text: a.textContent.trim(), href: a.href})).filter((v,i,arr) => arr.findIndex(x => x.text === v.text) === i)"

The event ID is the numeric portion at the end of each event URL (e.g., 8851274990600 from .../event/8851274990600).

2. Determine the CDN Date Prefix

The QR code URL uses a YYYYMM prefix based on creation month. To find the correct prefix:

1. Navigate to any event's promote page: https://www.huodongxing.com/myevent/promote?id=EVENT_ID&tab=0 (Note: clicking "推广活动" from the event list may open this in a new tab)
2. Find the image source:

   agent-browser eval "Array.from(document.querySelectorAll('img')).filter(i => i.alt === '小程序二维码').map(i => i.src)"
   

3. Extract the YYYYMM from the URL.

For events created in the same batch, they usually share the same prefix (e.g., all created in March 2026 use 202603).

3. Download QR Codes

mkdir -p ~/Downloads/ai-breakfast-qrcodes

# Download with required Referer header
curl -sf -H "Referer: https://www.huodongxing.com/" \
  -o ~/Downloads/ai-breakfast-qrcodes/ai-breakfast-NUM.png \
  "https://cdn.huodongxing.com/logo/YYYYMM/EVENT_ID/promoteMini.png"

Download in batch for multiple events:

for pair in "NUM1:EVENT_ID1" "NUM2:EVENT_ID2"; do
  NUM="${pair%%:*}"
  ID="${pair##*:}"
  curl -sf -H "Referer: https://www.huodongxing.com/" \
    -o ~/Downloads/ai-breakfast-qrcodes/ai-breakfast-${NUM}.png \
    "https://cdn.huodongxing.com/logo/YYYYMM/${ID}/promoteMini.png"
  echo "#${NUM} done"
done

Look up event IDs from the huodongxing console or the event's promote page.

Troubleshooting

• 1KB file / doesn't open: Missing Referer header. Always include -H "Referer: https://www.huodongxing.com/" with curl.
• CDN 404: Wrong YYYYMM prefix. Check the promote page to find the correct one.
• Login required: huodongxing uses SMS verification codes or WeChat QR scan. Open browser in --headed mode so the user can log in manually.
• New tabs opening silently: Always run agent-browser tab after clicking links — Chinese websites frequently use target="_blank".