#!/usr/bin/env python
# -*- coding: utf-8 -*-
# @Author: loveNightimport json
import itertools
import urllib
import requests
import os
import re
import sysstr_table = {'_z2C$q': ':','_z&e3B': '.','AzdH3F': '/'
}char_table = {'w': 'a','k': 'b','v': 'c','1': 'd','j': 'e','u': 'f','2': 'g','i': 'h','t': 'i','3': 'j','h': 'k','s': 'l','4': 'm','g': 'n','5': 'o','r': 'p','q': 'q','6': 'r','f': 's','p': 't','7': 'u','e': 'v','o': 'w','8': '1','d': '2','n': '3','9': '4','c': '5','m': '6','0': '7','b': '8','l': '9','a': '0'
}# str 的translate方法需要用单个字符的十进制unicode编码作为key
# value 中的数字会被当成十进制unicode编码转换成字符
# 也可以直接用字符串作为value
char_table = {ord(key): ord(value) for key, value in char_table.items()}# 解码图片URL
def decode(url):# 先替换字符串for key, value in str_table.items():url = url.replace(key, value)# 再替换剩下的字符return url.translate(char_table)# 生成网址列表
def buildUrls(word):word = urllib.quote(word)url = r"http://image.baidu.com/search/acjson?tn=resultjson_com&ipn=rj&ct=201326592&fp=result&queryWord={word}&cl=2&lm=-1&ie=utf-8&oe=utf-8&st=-1&ic=0&word={word}&face=0&istype=2nc=1&pn={pn}&rn=60"urls = (url.format(word=word, pn=x) for x in itertools.count(start=0, step=60))return urls# 解析JSON获取图片URL
re_url = re.compile(r'"objURL":"(.*?)"')
def resolveImgUrl(html):imgUrls = [decode(x) for x in re_url.findall(html)]return imgUrlsdef downImg(imgUrl, dirpath, imgName):filename = os.path.join(dirpath, imgName)try:res = requests.get(imgUrl, timeout=15)if str(res.status_code)[0] == "4":print(str(res.status_code), ":" , imgUrl)return Falseexcept Exception as e:print("抛出异常：", imgUrl)print(e)return Falsewith open(filename, "wb") as f:f.write(res.content)return Truedef mkDir(dirName):dirpath = os.path.join(sys.path[0], dirName)if not os.path.exists(dirpath):os.mkdir(dirpath)return dirpathif __name__ == '__main__':word = raw_input("请输入你要下载的图片关键词：\n")word = str(word)dirpath = mkDir("results")urls = buildUrls(word)index = 0for url in urls:print("正在请求：", url)html = requests.get(url, timeout=10).content.decode('utf-8')imgUrls = resolveImgUrl(html)if len(imgUrls) == 0:  # 没有图片则结束breakfor url in imgUrls:if downImg(url, dirpath, str(index) + ".jpg"):index += 1print("已下载 %s 张" % index)