class SpiderMan(object):
#进行类的初始化
def __init__(self):
self.manager = UrlManager()
self.downloader = HtmlDownLoader()
self.parser = HtmlParser()
self.output = DataOutput()
def crawl(self,root_url):
#添加入口url
self.manager.add_new_url(root_url)
#判断url管理器中是否有新的url,同时判断抓取了多少个url
while (self.manager.has_new_url() and self.manager.old_url_size() < 20):
time.sleep(1)
try:
#从url管理器中获取新的url
new_url = self.manager.get_new_url()
#HTML 下载器下载页面
html = self.downloader.download(new_url)
#HTML 解析器抽取页面数据
new_urls,data = self.parser.parser(new_url,html)
#将抽取的url 添加到url管理器中
self.manager.add_new_urls(new_urls)
#数据存储器存储文件
self.output.store_data(data)
print '已经抓取%s个链接' % self.manager.old_url_size()
except Exception,e: #Exception 常规错误的基类
print 'crawl failed'
#数据存储器将文件输出成指定格式
self.output.output_html()
class SpiderMan(object): def _init_(self): self.manager = UrlManager() self.downloader = HtmlDownloader() self.parser = HtmlParser() self.output = DataOutput() def crawl(self,root_url): #添加入口URL self.manager.add_new_url(root_url) #判断url管理器中是否有新的url，同时判断抓取了多少个url while(self.manager.has_new_url() and self.manager.old_url_size()<100): try: #从URL管理器获取新的url new_url = self.manager.get_new_url() #HTML下载器下载网页 html = self.downloader.download(new_url) #HTML解析器抽取网页数据 new_urls,data = self.parser.parser(new_url,html) #将抽取的url添加到URL管理器中 self.output.store_data(data) print "已经抓取%s个链接"%self.manager.old_url_size() except Exception,e: print "crawl failed" #数据存储器将文件输出成指定格式 self.output.output_html()
class SpiderMan(object):
def __init__(self):
self.manager = UrlManager()
self.downloader = HtmlDownloader()
self.parser = HtmlParser()
self.output = DataOutput()
def crawl(self):
# 添加URL入口
self.manager.add_new_url(
"https://www.amazon.cn/gp/bestsellers/books/ref=zg_bs_pg_1?ie=UTF8&pg=1"
)
self.manager.add_new_url(
"https://www.amazon.cn/gp/bestsellers/books/ref=zg_bs_pg_2?ie=UTF8&pg=2"
)
while (self.manager.has_new_url()
and self.manager.old_url_size() < 100):
try:
# 从URL管理器获取新的URL
new_url = self.manager.get_new_url()
# HTML下载器下载网页
html = self.downloader.download(new_url)
# HTML解析器抽取网页数据
book_details = self.parser.parser(new_url, html)
# 数据存储器存储文件
print(book_details)
for book_detail in book_details:
self.output.store_book(book_detail)
except Exception as e:
print("crawl failed")
self.output.output_html()
class SpiderMan(object):
def __init__(self):
self.manager = UrlManager()
self.downloader = HtmlDownloader()
self.parser = HtmlParser()
self.output = DataOutput()
def crawlHTML(self, root_url):
# 添加入口URL
self.manager.add_new_url(root_url)
# 判断url管理中时候是否有新的url， 同时判断抓取了多少个url
while (self.manager.has_new_url()):
try:
# 从URL管理器获取新的url
new_url = self.manager.get_new_url()
# HTML下载器下载网页
html = self.downloader.download(new_url)
# HTML解析器抽取网页数据
self.parser.parser(new_url, html)
except Exception, e:
print e
print "crawl failed"
class SpiderMan(object):
def __init__(self):
self.manager = UrlManager()
self.output = DataOutput()
self.downloader = HtmlDownloader
self.parser = HtmlParser()
def crawl(self, root_url):
self.manager.add_new_url(root_url)
while (self.manager.has_new_url() and self.manager.get_old_url_size() < 100):
try:
new_url = self.manager.get_new_url()
html = HtmlDownloader.download(new_url)
data = self.parser.parser(new_url, html)
# self.manager.add_new_url(new_urls)
self.output.store_data(data)
# print '已经抓取%s个链接' % self.manager.get_old_url_size()
except Exception, e:
print 'craml execption %s' % e
self.output.output_html()
class SpiderMan(object):
def __init__(self):
self.manager = UrlManager()
self.downloader = HtmlDownloader()
self.parser = HtmlParser()
self.output = DataOutput()
def crawl(self, root_url):
self.manager.add_new_url(root_url)
while (self.manager.has_new_url()
and self.manager.old_url_size() < 300):
try:
new_url = self.manager.get_new_url()
html = self.downloader.download(new_url)
new_urls, data = self.parser.parser(new_url, html)
self.manager.add_new_urls(new_urls)
self.output.store_data(data)
print("已经抓取%s个链接" % self.manager.old_url_size())
except Exception as e:
print("crawl failed")
self.output.output_html()