使用Python多线程爬虫爬取电影天堂资源

#解析首页
def CrawIndexPage(starturl):
print "正在爬取首页"
page = __getpage(starturl)
if page=="error":
return
page = page.decode('gbk', 'ignore')
tree = etree.HTML(page)
Nodes = tree.xpath("//div[@id='menu']//a")
print "首页解析出地址",len(Nodes),"条"
for node in Nodes:
CrawledURLs = []
CrawledURLs.append(starturl)
url=node.xpath("@href")[0]
if re.match(r'/html/[A-Za-z0-9_/]+/index.html', url):
if __isexit(host + url,CrawledURLs):
pass
else:
try:
catalog = node.xpath("text()")[0].encode("utf-8")
newdir = "E:/电影资源/" + catalog
os.makedirs(newdir.decode("utf-8"))
print "创建分类目录成功------"+newdir
thread = myThread(host + url, newdir,CrawledURLs)
thread.start()
except:
pass 

# 解析分类文件
def CrawListPage(indexurl,filedir,CrawledURLs):
print "正在解析分类主页资源"
print indexurl
page = __getpage(indexurl)
if page=="error":
return
CrawledURLs.append(indexurl)
page = page.decode('gbk', 'ignore')
tree = etree.HTML(page)
Nodes = tree.xpath("//div[@class='co_content8']//a")
for node in Nodes:
url=node.xpath("@href")[0]
if re.match(r'/', url):
# 非分页地址 可以从中解析出视频资源地址
if __isexit(host + url,CrawledURLs):
pass
else:
#文件命名是不能出现以下特殊符号
filename=node.xpath("text()")[0].encode("utf-8").replace("/"," ")\
.replace("\\"," ")\
.replace(":"," ")\
.replace("*"," ")\
.replace("?"," ")\
.replace("\""," ")\
.replace("<", " ") \
.replace(">", " ")\
.replace("|", " ")
CrawlSourcePage(host + url,filedir,filename,CrawledURLs)
pass
else:
# 分页地址 从中嵌套再次解析
print "分页地址 从中嵌套再次解析",url
index = indexurl.rfind("/")
baseurl = indexurl[0:index + 1]
pageurl = baseurl + url
if __isexit(pageurl,CrawledURLs):
pass
else:
print "分页地址 从中嵌套再次解析", pageurl
CrawListPage(pageurl,filedir,CrawledURLs)
pass
pass 

#处理资源页面 爬取资源地址
def CrawlSourcePage(url,filedir,filename,CrawledURLs):
print url
page = __getpage(url)
if page=="error":
return
CrawledURLs.append(url)
page = page.decode('gbk', 'ignore')
tree = etree.HTML(page)
Nodes = tree.xpath("//div[@align='left']//table//a")
try:
source = filedir + "/" + filename + ".txt"
f = open(source.decode("utf-8"), 'w')
for node in Nodes:
sourceurl = node.xpath("text()")[0]
f.write(sourceurl.encode("utf-8")+"\n")
f.close()
except:
print "!!!!!!!!!!!!!!!!!" 

class myThread (threading.Thread): #继承父类threading.Thread
def __init__(self, url, newdir,CrawledURLs):
threading.Thread.__init__(self)
self.url = url
self.newdir = newdir
self.CrawledURLs=CrawledURLs
def run(self): #把要执行的代码写到run函数里面 线程在创建后会直接运行run函数
CrawListPage(self.url, self.newdir,self.CrawledURLs)