$ crawl-pet --help

 Crawl-pet options help:

 -u, --url  string    Destination address
 -o, --outdir string    Save the directory, Default use pwd
 -r, --restart      Reload all page
 --clear        Clear queue
 --save   string    Save file rules following options
          = url: Save the path consistent with url
          = simple: Save file in the project path
          = group: Save 500 files in one folder
 --types   array    Limit download file type
 --limit   number=5   Concurrency limit
 --sleep   number=200   Concurrent interval
 --timeout  number=180000  Queue timeout
 --proxy   string    Set up proxy
 --parser  string    Set crawl rule, it's a js file path!
          The default load the parser.js file in the project path
 --maxsize  number    Limit the maximum size of the download file
 --minwidth  number    Limit the minimum width of the download file
 --minheight  number    Limit the minimum height of the download file
 -i, --info       View the configuration file
 -l, --list  array    View the queue data 
          e.g. [page/down/queue],0,-1
 -f, --find  array    Find the download URL of the local file
 --json        Print result to json format
 -v, --version      View version
 -h, --help       View help

$ crawl-pet -u https://www.reddit.com/r/funny/ -o reddit --save group

{
 "url": "https://www.reddit.com/r/funny/",
 "outdir": ".",
 "save": "group",
 "types": "",
 "limit": "5",
 "parser": "my_parser.js",
 "sleep": "200",
 "timeout": "180000",
 "proxy": "",
 "maxsize": 0,
 "minwidth": 0,
 "minheight": 0,


 "cookie": "over18=1"
}

exports.body = function(url, body, response, crawler_handle) {
 const re = /\b(data-url|href|src)\s*=\s*["']([^'"#]+)/ig
 var m = null
 while (m = re.exec(body)){
  let href = m[2]
  if (/thumb|user|icon|\.(css|json|js|xml|svg)\b/i.test(href)) {
   continue
  }
  if (/\.(png|gif|jpg|jpeg|mp4)\b/i.test(href)) {
   crawler_handle.addDown(href)
   continue
  }
  if(/reddit\.com\/r\//i.test(href)){
   crawler_handle.addPage(href)
  }
 }
 crawler_handle.over()
}