最近在搞爬虫,然后得知webkit是个爬虫最终利器,然后开始去了解了一下pywebkit。
发现国内很少这方面的资源,国外的话搜寻了好久也没搜到比较好的。
官网上的文档貌似也没找着,然后看了下官网给的例子,结果还是没找着想要的。
然后东凑西拼了一下,找到了一个返回html的类,如下:
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class WebView(webkit.WebView):
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def get_html(self):
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self.execute_script('oldtitle=document.title;document.title=document.documentElement.innerHTML;')
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html = self.get_main_frame().get_title()
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self.execute_script('document.title=oldtitle;')
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return html
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然后自己弄了几个webview的对象出来,open了一下一个url,然后调用get_html()发现啥都木有
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web = WebView()
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web.open(url)
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html = web.get_html()
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print html
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print str(html)
后来又google了一番,终于找到怎么调用这个类的方法:
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#!/usr/bin/env python
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import sys, threads # kudos to Nicholas Herriot (see comments)
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import gtk
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import webkit
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import warnings
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from time import sleep
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from optparse import OptionParser
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warnings.filterwarnings('ignore')
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class WebView(webkit.WebView):
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def get_html(self):
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self.execute_script('oldtitle=document.title;document.title=document.documentElement.innerHTML;')
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html = self.get_main_frame().get_title()
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self.execute_script('document.title=oldtitle;')
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return html
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class Crawler(gtk.Window):
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def __init__(self, url, file):
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gtk.gdk.threads_init() # suggested by Nicholas Herriot for Ubuntu Koala
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gtk.Window.__init__(self)
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self._url = url
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self._file = file
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def crawl(self):
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view = WebView()
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view.open(self._url)
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view.connect('load-finished', self._finished_loading)
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self.add(view)
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gtk.main()
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def _finished_loading(self, view, frame):
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with open(self._file, 'w') as f:
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f.write(view.get_html())
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gtk.main_quit()
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def main():
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options = get_cmd_options()
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crawler = Crawler(options.url, options.file)
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crawler.crawl()
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def get_cmd_options():
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"""
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gets and validates the input from the command line
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"""
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usage = "usage: %prog [options] args"
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parser = OptionParser(usage)
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parser.add_option('-u', '--url', dest = 'url', help = 'URL to fetch data from')
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parser.add_option('-f', '--file', dest = 'file', help = 'Local file path to save data to')
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(options,args) = parser.parse_args()
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if not options.url:
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print 'You must specify an URL.',sys.argv[0],'--help for more details'
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exit(1)
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if not options.file:
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print 'You must specify a destination file.',sys.argv[0],'--help for more details'
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exit(1)
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return options
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if __name__ == '__main__':
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main()
Ok,html到手
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