本案例介绍从JavaScript中采集加载的数据。更多内容请参考:Python学习指南
#-*- coding:utf-8 -*-
import requests
import re
import time
import json
#数据下载器
class HtmlDownloader(object):
def download(self, url, params=None):
if url is None:
return None
user_agent = 'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0'
headers = {'User-Agent':user_agent}
if params is None:
r = requests.get(url, headers = headers)
else:
r = requests.get(url, headers = headers, params = params)
if r.status_code == 200:
r.encoding = 'utf-8'
return r.text
return None
#数据存储器
class HtmlParser(object):
#从选购电影页面中解析出所有电影信息，组成一个list
def parser_url(self, page_url, response):
pattern = re.compile(r'(http://movie.mtime.com/(\d+)/)')
urls = pattern.findall(response)
if urls != None:
#将urls去重
return list(set(urls))
else:
return None
#解析正在上映的电影
def __parser_release(self, page_url, value):
'''
解析已经上映的电影
:param page_url：电影链接
:param value: json数据
:return
'''
try:
isRelease = 1
movieRating = value.get('value').get('movieRating')
boxOffice = value.get('value').get('boxOffice')
movieTitle = value.get('value').get('movieTitle')
RPictureFinal = movieRating.get('RPictureFinal')
RStoryFinal = movieRating.get('RStoryFinal')
RDirectorFinal = movieRating.get('RDirectorFinal')
ROtherFinal = movieRating.get('ROtherFinal')
RatingFinal = movieRating.get('RatingFinal')
MovieId = movieRating.get("MovieId")
UserCount = movieRating.get("Usercount")
AttitudeCount = movieRating.get("AttitudeCount")
TotalBoxOffice = boxOffice.get("TotalBoxOffice")
TotalBoxOfficeUnit = boxOffice.get("TotalBoxOfficeUnit")
TodayBoxOffice = boxOffice.get("TodayBoxOffice")
TodayBoxOfficeUnit = boxOffice.get("TodayBoxOfficeUnit")
ShowDays = boxOffice.get('ShowDays')
try:
Rank = boxOffice.get('Rank')
except Exception,e:
Rank = 0
#返回所提取的内容
return (MovieId, movieTitle, RatingFinal, ROtherFinal, RPictureFinal, RDirectorFinal, RStoryFinal, UserCount, AttitudeCount, TotalBoxOffice+TotalBoxOfficeUnit, TodayBoxOffice+TodayBoxOfficeUnit, Rank, ShowDays, isRelease)
except Exception, e:
print e, page_url, value
return None
#解析未上映的电影
def __parser_no_release(self, page_url, value, isRelease=0):
'''
解析未上映的电影信息
:param page_url
:param value
: return
'''
try:
movieRating = value.get('value').get('movieRating')
movieTitle = value.get('value').get('movieTitle')
RPictureFinal = movieRating.get('RPictureFinal')
RStoryFinal = movieRating.get('RStoryFinal')
RDirectorFinal = movieRating.get('RDirectorFinal')
ROtherFinal = movieRating.get('ROtherFinal')
RatingFinal = movieRating.get('RatingFinal')
MovieId = movieRating.get("MovieId")
UserCount = movieRating.get("Usercount")
AttitudeCount = movieRating.get("AttitudeCount")
try:
Rank = value.get('value').get('hotValue').get('Ranking')
except Exception,e:
Rank = 0
#返回所提取的内容
return (MovieId, movieTitle, RatingFinal, ROtherFinal, RPictureFinal, RDirectorFinal, RStoryFinal, UserCount, AttitudeCount, u'无', u'无', Rank, 0, isRelease)
except Exception, e:
print e, page_url, value
return None
#解析电影中的json信息
def parser_json(self, page_url, response):
"""
解析响应
:param response
:return
"""
#将"="和";"之间的内容提取出来
pattern = re.compile(r'=(.*?);')
result = pattern.findall(response)[0]
if result != None:
#json模块加载字符串
value = json.loads(result)
# print(result)
try:
isRelease = value.get('value').get('isRelease')
except Exception, e:
print e
return None
if isRelease:
'''
isRelease:0 很长时间都不会上映的电影；1 已经上映的电影； 2 即将上映的电影
'''
if value.get('value').get('hotValue') == None:
#解析正在上映的电影
# print(self.__parser_release(page_url, value))
return self.__parser_release(page_url, value)
else:
#解析即将上映的电影
# print(self.__parser_no_release(page_url, value, isRelease = 2))
return self.__parser_no_release(page_url, value, isRelease = 2)
else:
#解析还有很长时间才能上映的电影
return self.__parser_no_release(page_url, value)
#数据存储器
#数据存储器将返回的数据插入mysql数据库中，主要包括建表，插入和关闭数据库等操作，表中设置了15个字段，用来存储电影信息，代码如下：
#这里以后补充
class SpiderMain(object):
def __init__(self):
self.downloader = HtmlDownloader()
self.parser = HtmlParser()
def crawl(self, root_url):
content = self.downloader.download(root_url)
urls = self.parser.parser_url(root_url, content)
#构造一个活的评分和票房链接
for url in urls:
try:
t = time.strftime("%Y%m%d%H%M%S3282", time.localtime())
param = {
'Ajax_CallBack':'true',
'Ajax_CallBackType': 'Mtime.Library.Services',
'Ajax_CallBackMethod': 'GetMovieOverviewRating',
'Ajax_CallBackArgument0' : '%s'%(url[1]),
'Ajax_RequestUrl' : '%s'%(url[0]),
'Ajax_CrossDomain' : '1',
't' : '%s'%t
}
rank_url = 'http://service.library.mtime.com/Movie.api?'
rank_content = self.downloader.download(rank_url, param)
data = self.parser.parser_json(rank_url, rank_content)
self.output.output_end()
except Exception, e:
print("Crawl failed")
if __name__ == '__main__':
spier = SpiderMain()
spier.crawl('http://theater.mtime.com/China_Jiangsu_Province_Nanjing/')