$ npm install crawl-pet -g --production

$ crawl-pet

> Set project dir: ./test-crawl-pet
> Create crawl-pet in ./test-crawl-pet [y/n]: y
> Set target url: http://foodshot.co/
> Set save rule [url/simple/group]: url
> Set file type limit: 
> The limit: not limit
> Set parser rule module:
> The module: use default crawl-pet.parser

$ crawl-pet -o ./test-crawl-pet

$ crawl-pet --create-parser ./test-crawl-pet/parser.js

// crawl-pet 支持使用 cheerio，來進行頁面分析，如果你有這個需要
const cheerio = require("cheerio")

/*
 * header 函數是在請求發(fā)送前調用，可以配置請求的頭信息，如果返回 false，則中斷請求
 *
 * 參數：
 *  options:   詳細設置請看 https://github.com/request/request
 *  crawler_handle: 與隊列通信的對象，詳情見下
 *
 * header 函數是可選的，可不寫
 */
exports.header = function(options, crawler_handle) {  
}

/*
 * body 函數是在請求返回后調用，用來解析返回結果
 *
 * 參數:
 *  url:   請求的 url
 *  body:   請求返回結果, string 類型
 *  response:  請求的響應，詳情請看： https://github.com/request/request
 *  crawler_handle: 與隊列通信的對象，該對象包含以下方法
 *   .info    : crawl-pet 的配置信息
 *   .uri     : 當前請求的 uri 信息
 *   .addPage(url)  : 向隊列里添加一個待解析頁面
 *   .addDown(url)  : 向隊列里添加一個待下載文件
 *   .save(content, ext) : 保存文本到本地，ext 設置保存文件的后綴名
 *   .over()    : 結束當前隊列，取出下一條隊列數據
 */

exports.body = function(url, body, response, crawler_handle) {
 const re = /\b(href|src)\s*=\s*["']([^'"#]+)/ig
 var m = null
 while (m = re.exec(body)){
  let href = m[2]
  if (/\.(png|gif|jpg|jpeg|mp4)\b/i.test(href)) {
    // 這理添加了一條下載
   crawler_handle.addDown(href)
  }else if(!/\.(css|js|json|xml|svg)/.test(href)){
    // 這理添加了一個待解析頁面
   crawler_handle.addPage(href)
  }
 }
  // 記得在解析結束后一定要執(zhí)行
 crawler_handle.over()
}

$ crawl-pet -f ./test-crawl-pet/photos.foodshot.co/*.jpg

$ crawl-pet -l queue

$ 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()
}