龍族三漫畫下載代碼

 在閱讀爬蟲-漫畫喵的100行逆襲 的代碼後，觀察龍族三漫畫圖片地址規律，簡寫專門下載龍族三漫畫的小爬蟲。

#coding=utf-8

import os 
import urllib2

#簡單下載器
def download(url, save_path):
    try:
        with open(save_path, 'wb') as fp:
            fp.write(urllib2.urlopen(url).read())

    except Exception, et:
        print(et)

#定義存儲目錄
save_folder = ".\longzu"

if not os.path.exists(save_folder):
    os.mkdir(save_folder)

#漫畫圖片連接，可經過格式化字符串的方式獲取新的圖片連接
url = 'http://mhpic.zymk.cn/comic/L%2F%E9%BE%99%E6%97%8F%E2%85%A2%2F{0}%E8%AF%9D%2F{1}.jpg-mht.middle'

#初始章節
chapter = 1

#循環下載章節
while chapter < 47:
    #生成章節目錄
    folder = os.path.join(save_folder,u"第 %d 話"%chapter)
    if not os.path.exists(folder):
        os.mkdir(folder)
    
    index = 1
    while True:
        image_url = url.format('%.2d'%chapter,index)
        save_image_name = os.path.join(folder,"%.2d"%index+"."+"jpg")
        #判斷是否到達章節最後一頁
        try:
            tmp = urllib2.urlopen(image_url).read()
        except urllib2.HTTPError:
            break
        
        print "downloading:%s from url:%s" % (save_image_name,image_url)
        download(image_url, save_image_name)
        index += 1
    chapter += 1