如何使用beautiful soup和python获取favicon

Question

我写了一些愚蠢的代码只是为了学习，但它不适用于任何网站。 这是代码：

import urllib2, re
from BeautifulSoup import BeautifulSoup as Soup

class Founder:
    def Find_all_links(self, url):
        page_source = urllib2.urlopen(url)
        a = page_source.read()
        soup = Soup(a)

        a = soup.findAll(href=re.compile(r'/.a\w+'))
        return a
    def Find_shortcut_icon (self, url):
        a = self.Find_all_links(url)
        b = ''
        for i in a:
            strre=re.compile('shortcut icon', re.IGNORECASE)
            m=strre.search(str(i))
            if m:
                b = i["href"]
        return b
    def Save_icon(self, url):
        url = self.Find_shortcut_icon(url)
        print url
        host = re.search(r'[0-9a-zA-Z]{1,20}\.[a-zA-Z]{2,4}', url).group()
        opener = urllib2.build_opener()
        icon = opener.open(url).read()
        file = open(host+'.ico', "wb")
        file.write(icon)
        file.close()
        print '%s icon successfully saved' % host
c = Founder()
print c.Save_icon('http://lala.ru')

最奇怪的是它适用于网站： http://habrahabr.ru http://5pd.ru

但对于我检查过的大多数其他人来说不起作用。

Answer 1

你让事情变得比需要的复杂得多。这是一个简单的方法：

import urllib
page = urllib.urlopen("http://5pd.ru/")
soup = BeautifulSoup(page)
icon_link = soup.find("link", rel="shortcut icon")
icon = urllib.urlopen(icon_link['href'])
with open("test.ico", "wb") as f:
    f.write(icon.read())

Answer 2

Thomas K 的回答让我朝着正确的方向开始，但我发现一些网站没有说 rel="shortcut icon"，例如 1800contacts.com 只说 rel="icon"。这适用于 Python 3 并返回链接。如果需要，您可以将其写入文件。

from bs4 import BeautifulSoup
import requests

def getFavicon(domain):
    if 'http' not in domain:
        domain = 'http://' + domain
    page = requests.get(domain)
    soup = BeautifulSoup(page.text, features="lxml")
    icon_link = soup.find("link", rel="shortcut icon")
    if icon_link is None:
        icon_link = soup.find("link", rel="icon")
    if icon_link is None:
        return domain + '/favicon.ico'
    return icon_link["href"]

Answer 3

如果有人想使用正则表达式进行一次检查，以下方法对我有用：

import re

from bs4 import BeautifulSoup

html_code = "<Some HTML code you get from somewhere>"

soup = BeautifulSoup(html_code, features="lxml")

for item in soup.find_all('link', attrs={'rel': re.compile("^(shortcut icon|icon)$", re.I)}):
    print(item.get('href'))

这也将解释区分大小写的情况。

Answer 4

谢谢你，库尔德人。这是经过一些更改的代码：

import  urllib2
from BeautifulSoup import BeautifulSoup 

url = "http://www.facebook.com" 
page = urllib2.urlopen(url)
soup = BeautifulSoup(page.read())
icon_link = soup.find("link", rel="shortcut icon")
try:
    icon = urllib2.urlopen(icon_link['href'])
except:
    icon = urllib2.urlopen(url + icon_link['href'])
iconname = url.split(r'/')
iconname = iconname[2].split('.')
iconname = iconname[1] + '.' + iconname[2] + '.ico'
with open(iconname, "wb") as f:
    f.write(icon.read())

Answer 5

谢谢你，托马斯。
这是经过一些更改的代码：

import  urllib2
from BeautifulSoup import BeautifulSoup 

page = urllib2.urlopen("http://5pd.ru/")
soup = BeautifulSoup(page.read())
icon_link = soup.find("link", rel="shortcut icon")
icon = urllib2.urlopen(icon_link['href'])
with open("test.ico", "wb") as f:
    f.write(icon.read())