1 #-*- coding:UTF-8 -*-

2 importrequests3 from lxml importetree4 importsys5 importio6 importos7

8

9 sys.stdout = io.TextIOWrapper(sys.stdout.buffer, encoding='gb18030')10

11

12 classCnBlogs:13 """"14 Auth：reader15 发表地址：https://www.cnblogs.com/reader/p/11487398.html16 作者地址：https://www.cnblogs.com/reader17 """

18 def __init__(self):19 self.headers = {'User-Agent':'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.132 Safari/537.36'}20

21 self.target_domain = "https://www.cnblogs.com"

22 self.page = 1

23 self.lists ={}24

25 defclearscreen(self):26 """根据系统，清屏操作"""

27 #window下的清屏方式

28 os.system("cls")29

30 defset_target_url(self, page):31 if page == 1:32 self.target_url =self.target_domain33 else:34 self.target_url = 'https://www.cnblogs.com/sitehome/p/'+str(page)35

36 defdownload(self, page):37 """下载html页面内容"""

38 self.set_target_url(page)39 response = requests.get(self.target_url, headers=self.headers)40 if response.status_code == 200:41 returnresponse.content42 else:43 print("download fail")44 return ""

45

46 defisascii(self, ch):47 return ch <= u'\u007f'

48

49 defformatByWidth(self, text, width):50 """格式化字符串长度"""

51 count =052 for u intext:53 if notself.isascii(u):54 count += 1

55 return text + " " * (width - count -len(text))56

57 defparse(self, content):58 """解析HTML内容"""

59 html =etree.HTML(content)60 lists = html.xpath('//div[@id="post_list"]//div[@class="post_item_body"]')61

62 delhtml63 k = 1

64 print('+', '--' * 50, '+')65 print('|', str("当前页码："+str(self.page)).ljust(95), '|')66 print('+', '--' * 50, '+')67 for li inlists:68 title = str(li.xpath('h3/a/text()')[0])69 link = li.xpath('h3/a/@href')[0]70 desc = li.xpath('p')[0].xpath('string(.)')71

72 self.lists[k] ={73 'title': title,74 'desc': desc.strip(),75 'link': link76 }77

78 print('|', k, self.formatByWidth(title, 100-1-len(str(k))), '|')79 k += 1

80 dellists81 print('+', '--' * 50, '+')82

83 defdescopt(self, k):84 """读取详情"""

85 k =int(k)86 if k not inself.lists.keys():87 return

88 self.clearscreen()89 print('+', '--' * 50, '+')90 print('|', self.formatByWidth(self.lists[k]['title'], 100), '|')91 print('+', '--' * 50, '+')92 print('|', self.formatByWidth(self.lists[k]['link'], 100), '|')93 print('+', '--' * 50, '+')94

95 print('|', self.formatByWidth(self.lists[k]['desc'], 100), '|')96

97 print('+', '--' * 50, '+')98 input("输入任意键返回...\r\n")99

100 defreadopt(self):101 """开始阅读操作"""

102 whileTrue:103 self.clearscreen()104 print("\r\n")105 html = self.download(page=self.page)106 self.parse(html)107

108 print("[N]：下一页，[B]：上一页，[H]：首页，[D {num}]：简述, [Q]：返回")109

110 cmd = input("请输入操作编号[N、B、H、D、Q]：")111

112 if cmd == 'Q' or cmd == 'q': #返回

113 break

114 elif cmd == 'N' or cmd == 'n': #下一页

115 self.page += 1

116 elif cmd == 'B' or cmd == 'b': #上一页

117 self.page -= 1

118 if self.page <=0:119 self.page = 1

120 elif cmd == 'H' or cmd == 'h': #首页

121 self.page = 1

122 else:123 cmd = cmd.split(' ')124

125 if len(cmd) != 2:126 continue

127 #读取简述

128 if cmd[0] == 'D' or cmd[0] == 'd':129 self.descopt(cmd[1])130

131 defaboutopt(self):132 self.clearscreen()133 print("博客园地址: https://www.cnblogs.com/reader\r\n")134 input("输入任意键返回...\r\n")135

136 defstart(self):137 self.clearscreen()138 whileTrue:139 print('+', '--'*50, '+')140 print('|', "欢迎使用博客园阅读器(reader 开发)".center(88), '|')141 print('+', '--' * 50, '+')142 print('|', "[1]：开始阅读".center(95), '|')143 print('|', "[2]：关于作者".center(95), '|')144 print('|', "[Q]：退出软件".center(95), '|')145 print('+', '--' * 50, '+')146

147 cmd = input("请输入操作编号[1、2、Q]：")148 if cmd == '1':149 self.readopt()150 elif cmd == '2':151 self.aboutopt()152 elif cmd == 'Q' or cmd == 'q':153 break

154

155 os.system("cls")156

157 print("已退出，欢迎使用！")158

159

160 if __name__ == "__main__":161 obj =CnBlogs()162 obj.start()