目前我有一个程序只能下载给定页面的HTML。现在我想要一个可以下载网页所有文件的程序,包括HTML,CSS,JS和图像文件(与我们在任何网站上的ctrl-s相同)。
我目前的计划是:
import urllib
urllib.urlretrieve ("https://en.wikipedia.org/wiki/Python_%28programming_language%29", "t3.html")
我在Stack Overflow中访问了很多这样的问题,但它们都只是下载HTML文件。
答案 0 :(得分:7)
以下实现使您可以获取子HTML网站。它可以更加开发,以获得您需要的其他文件。我为您设置了depth
变量,以设置要解析的最大sub_websites。
import urllib2
from BeautifulSoup import *
from urlparse import urljoin
def crawl(pages, depth=None):
indexed_url = [] # a list for the main and sub-HTML websites in the main website
for i in range(depth):
for page in pages:
if page not in indexed_url:
indexed_url.append(page)
try:
c = urllib2.urlopen(page)
except:
print "Could not open %s" % page
continue
soup = BeautifulSoup(c.read())
links = soup('a') #finding all the sub_links
for link in links:
if 'href' in dict(link.attrs):
url = urljoin(page, link['href'])
if url.find("'") != -1:
continue
url = url.split('#')[0]
if url[0:4] == 'http':
indexed_url.append(url)
pages = indexed_url
return indexed_url
pagelist=["https://en.wikipedia.org/wiki/Python_%28programming_language%29"]
urls = crawl(pagelist, depth=2)
print urls
答案 1 :(得分:2)
您可以使用简单的python库pywebcopy
轻松地做到这一点。
对于当前版本:5.0.1
from pywebcopy import save_webpage
url = 'http://some-site.com/some-page.html'
download_folder = '/path/to/downloads/'
kwargs = {'bypass_robots': True, 'project_name': 'recognisable-name'}
save_webpage(url, download_folder, **kwargs)
您的download_folder中将包含html,css,js。完全像原始网站一样工作。
答案 2 :(得分:1)
尝试使用Python库Scrapy。您可以通过下载其页面,扫描以及以下链接来对Scrapy进行编程以递归扫描网站:
用于从网站中提取所需数据的开源和协作框架。以快速,简单,可扩展的方式。
答案 3 :(得分:1)
使用Python 3+ Requests 和其他标准库。
函数savePage
接收一个requests.Response
和一个pagefilename
的保存位置。
pagefilename
。html 保存在当前文件夹中javascripts
,css
和images
下载script
,link
和img
,并保存在文件夹 pagefilename
_文件。 sys.stderr
上打印任何异常,并返回BeautifulSoup
对象。 session
必须是全局变量,除非有人在这里为我们编写了更简洁的代码。 您当然可以做得更好。
import os, sys
import requests
from urllib.parse import urljoin
from bs4 import BeautifulSoup
def soupfindAllnSave(pagefolder, url, soup, tag2find='img', inner='src'):
if not os.path.exists(pagefolder): # create only once
os.mkdir(pagefolder)
for res in soup.findAll(tag2find): # images, css, etc..
try:
filename = os.path.basename(res[inner])
fileurl = urljoin(url, res.get(inner))
# rename to saved file path
# res[inner] # may or may not exist
filepath = os.path.join(pagefolder, filename)
res[inner] = filepath
if not os.path.isfile(filepath): # was not downloaded
with open(filepath, 'wb') as file:
filebin = session.get(fileurl)
file.write(filebin.content)
except Exception as exc:
print(exc, file=sys.stderr)
return soup
def savePage(response, pagefilename='page'):
url = response.url
soup = BeautifulSoup(response.text)
pagefolder = pagefilename+'_files' # page contents
soup = soupfindAllnSave(pagefolder, url, soup, 'img', inner='src')
soup = soupfindAllnSave(pagefolder, url, soup, 'link', inner='href')
soup = soupfindAllnSave(pagefolder, url, soup, 'script', inner='src')
with open(pagefilename+'.html', 'w') as file:
file.write(soup.prettify())
return soup
示例保存google页面及其内容(google_files
文件夹)
session = requests.Session()
#... whatever requests config you need here
response = session.get('https://www.google.com')
savePage(response, 'google')