# *-* coding:utf-8 *-*
import requests
from bs4 import BeautifulSoup
import os
import sys
import getopt
class Dlcx(object):
#初始化：检测链接是否有效
def __init__(self, url, items = 'all', output = '.\\', raw_options='', video_id=""):
if url[:33] == 'http://video.chaoxing.com/serie_4' and url[41:] == '.shtml':
self.url = url
self.serverlist = ['1', '2', '3', '4', '5']
self.items = items
self.output = output+"\\"
self.raw_options = raw_options
self.video_id = video_id
else:
print('请检查链接格式, \"cxdl.exe -h\" 获取帮助')
exit
def getpage(self):
session = requests.Session()
headers = {'User-Agent':'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:47.0) Gecko/20100101 Firefox/47.0'}
self.r = session.get(self.url)
def usefulserver(self):
for j in self.serverlist:
test_url = self.filelist[1][1][:33] + j + self.filelist[1][1][34:]
# print(test_url)
try:
test_r = requests.get(test_url, stream=True)
except :
# print(j+"号服务器连接失败！")
if j == '5':
exit
else:
self.server = j
print("文件位于 " + j + " 号服务器")
break
for i in range(0, len(self.filelist)):
self.filelist[i][1] = self.filelist[i][1][:33] + self.server + self.filelist[i][1][34:]
self.filelist[i][0] = self.output + self.filelist[i][0]
def getdllist(self):
for i in range(34,41):
if self.url[i] != '0':
not_zero = i
break
video_id = self.url[not_zero:self.url.index('shtml')-1]
if self.video_id != '':
video_id = self.video_id
rtext = self.r.text
teacher_index = rtext.index('/teacher_')
teacher_id = rtext[teacher_index+9: teacher_index+16]
teacher = teacher_id[:teacher_id.index('.')]
screen = BeautifulSoup(rtext, 'lxml').select('.screen')[1]
all_a = screen.find_all('a')
self.filelist = []
for i in range(0,len(all_a)):
proc = all_a[i]
href = proc.attrs['href']
filename = '第'+str(i+1)+'集-'+proc.attrs['title']+'.flv'
href_id = href[href.rfind('_')+1: href.index('.')]
filehref = 'http://video.superlib.com/shipin0'+ '0' +'/cx/'+video_id+'/0/'+teacher+'/'+href_id+'.flv'
self.filelist.append([filename, filehref])
def dl(self):
if items == 'all':
for task in self.filelist:
os.system('wget.exe -O '+ task[0] + ' ' + task[1])
else:
if max(self.items) > len(self.filelist) or min(self.items) < 1:
print("请求下载的编号不在编号区间")
sys.exit(1)
for i in self.items:
rtc = os.system('wget.exe -c -O '+self.filelist[i-1][0]+' '+self.raw_options+' '+self.filelist[i-1][1])
while rtc:
os.system('wget.exe -c -O '+self.filelist[i-1][0]+' '+self.raw_options+' '+self.filelist[i-1][1])
def extend(string, toint=False):
ext = []
start =0
end = 0
i = 0
while i < len(string):
while string[i] != ',':
i += 1
if i == (len(string)):
break
end = i
i += 1
if toint:
s = string[start:end]
if '-' in s:
if s.index('-') == 0:
sys.exit('不允许存在负数编号')
for j in range(int(s[:s.index('-')]),int(s[s.index('-')+1:])+1):
ext.append(j)
else:
ext.append(int(string[start:end]))
else:
ext.append(string[start:end])
start = end+1
return ext
#main
if __name__ == "__main__" :
version = "cxdl version 0.3 Time:2017/7/15 Author:iokeyz@Github Blog:yaoz.cnblogs.com"
helpdoc = '''
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
用法：
-h , --help 获取帮助信息
-v , --version 获取版本信息
-s , --serie 超星课程列表地址,多个用逗号分隔,如："http://video.chaoxing.com/serie_400000001.shtml"
-g , --get 选择课程列表的某项或某几项(逗号分隔)下载,如："1,5-10,11"
-o , --output 选择输出路径,如："D:\Download\\"
-r , --raw 支持wget源命令，如："--limit-rate=1024k"
-i , --id 指定video_id，某些情况下，无法仅由列表获取下载链接
获取方法:使用idm下载其中任意一个视频，对照如下链接格式，使用-i参数指定video_id即可
http://video.superlib.com/shipin0(server_id)/cx/(video_id)/0/(teacher_id)/(video_number).flv
例如：
>>> cxdl.exe -s http://video.chaoxing.com/serie_400015556.shtml -r "--limit-rate=20k" -g 1,45-58,25 -i 8049
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
'''
try:
opts, args = getopt.getopt(sys.argv[1:], "hvs:g:o:r:i:", ["help","version","serie=","get=","output=","raw=","id="])
all_opt = []
all_val = []
for opt_val in opts:
all_opt.append(opt_val[0])
all_val.append(opt_val[1])
items = None
output = None
video_id= ''
raw_options = ''
if '-v' in all_opt or '--version' in all_opt:
print(version)
if '-h' in all_opt or '--help' in all_opt:
print(helpdoc)
elif '-s' in all_opt or '--serie' in all_opt:
if '-s' in all_opt:
series = extend(all_val[all_opt.index('-s')], toint=False)
else:
series = extend(all_val[all_opt.index('--serie')], toint=False)
if '-g' in all_opt:
items = extend(all_val[all_opt.index('-g')], toint=True)
elif '--get' in all_opt:
items = extend(all_val[all_opt.index('--get')], toint=True)
if '-o' in all_opt:
output = all_val[all_opt.index('-o')]
elif '--output' in all_opt:
output = all_val[all_opt.index('--output')]
if '-r' in all_opt:
raw_options = all_val[all_opt.index('-r')]
elif '--raw' in all_opt:
raw_options = all_val[all_opt.index('--raw')]
if '-i' in all_opt:
video_id = all_val[all_opt.index('-i')]
elif '--id' in all_opt:
video_id = all_val[all_opt.index('--id')]
for i in range(0, len(series)):
if items == None:
items = 'all'
if output == None:
output = '.\\'
if raw_options == None:
raw_options = ''
dlcx = Dlcx(series[i], items, output, raw_options, video_id)
dlcx.getpage()
dlcx.getdllist()
print("开始下载："+series[i])
print("下载内容："+str(items))
print("保存地址："+output)
print("下载参数："+raw_options+" -O filename.flv")
dlcx.usefulserver()
dlcx.dl()
else:
print(helpdoc)
except getopt.GetoptError:
print("getopt error!")
sys.exit(1)
