Hugin monitors web page changes and pushes them

Take the weekly special price page of Turing community as an example:https://www.ituring.com.cn/tag/36527

Grab content

This page will update three half price e-books every Monday

After copying and pasting, you can see that the XPath of the three books are:

//*[@id="tag-book"]/div/ul/li[1]/div[2]/h4/a

//*[@id="tag-book"]/div/ul/li[2]/div[2]/h4/a

//*[@id="tag-book"]/div/ul/li[3]/div[2]/h4/a

Only the middleli[]The content is different

So the options section and the XPath part can be usedli[*]Match all cases. You can write as follows:

{
  "expected_update_period_in_days": "2",
  "url": "https://www.ituring.com.cn/tag/36527",
  "type": "html",
  "mode": "on_change",
  "extract": {
    "url": {
      "xpath": "//*[@id=\"tag-book\"]/div/ul/li[*]/div[2]/h4/a",
      "value": "@href"
    },
    "title": {
      "xpath": "//*[@id=\"tag-book\"]/div/ul/li[*]/div[2]/h4/a",
      "value": "@title"
    }
  }
}

Push content

Use slack agent to push
Options section:

{
  "webhook_url": "https://hooks.slack.com/services/xxxx/xxxxxxxx",
  "channel": "#book",
  "username": "Huginn",
  "message": "{{title}}    https://www.ituring.com.cn{{url}}",
  "icon": ""
}

effect