下载Web目录中的所有图像

Question

我正在尝试使用BeautifulSoup4在我的web服务器上的特定目录中收集所有图像。你知道吗

到目前为止我得到了这个密码

from init import *
from bs4 import BeautifulSoup
import urllib
import urllib.request
# use this image scraper from the location that 
#you want to save scraped images to

def make_soup(url):
    html = urllib.request.urlopen(url)
    return BeautifulSoup(html, features="html.parser")

def get_images(url):
    soup = make_soup(url)
    #this makes a list of bs4 element tags
    images = [img for img in soup.findAll('img')]
    print (str(len(images)) + "images found.")
    print ('Downloading images to current working directory.')
    #compile our unicode list of image links
    image_links = [each.get('src') for each in images]
    for each in image_links:
        filename=each.split('/')[-1]
        urllib.request.Request(each, filename)
    return image_links

#a standard call looks like this
get_images('https://omabilder.000webhostapp.com/img/')

但是，这会导致以下错误

7images found.
Downloading images to current working directory.
Traceback (most recent call last):
  File "C:\Users\MyPC\Desktop\oma projekt\getpics.py", line 1, in <module>
    from init import *
  File "C:\Users\MyPC\Desktop\oma projekt\init.py", line 9, in <module>
    from getpics import *
  File "C:\Users\MyPC\Desktop\oma projekt\getpics.py", line 26, in <module>
    get_images('https://omabilder.000webhostapp.com/img/')
  File "C:\Users\MyPC\Desktop\oma projekt\getpics.py", line 22, in get_images
    urllib.request.Request(each, filename)
  File "C:\Users\MyPC\AppData\Local\Programs\Python\Python37-32\lib\urllib\request.py", line 328, in __init__
    self.full_url = url
  File "C:\Users\MyPC\AppData\Local\Programs\Python\Python37-32\lib\urllib\request.py", line 354, in full_url
    self._parse()
  File "C:\Users\MyPC\AppData\Local\Programs\Python\Python37-32\lib\urllib\request.py", line 383, in _parse
    raise ValueError("unknown url type: %r" % self.full_url)
ValueError: unknown url type: '/icons/blank.gif'

我不明白的是：

目录中没有GIF，也没有/icon/子目录。 此外，它吐出7个图像被发现，当只有像3上传到网站上。你知道吗

Answer 1

gif是网站链接旁边的图标（小到20x20像素的图像）。它们实际上在网站上有显示。如果我理解正确的话，你想下载png图片这些是链接，而不是你提供的url上的图片。你知道吗

如果您想从链接下载png图像，那么可以使用以下内容：

from bs4 import BeautifulSoup
import urllib
import urllib.request
import os
# use this image scraper from the location that 
#you want to save scraped images to

def make_soup(url):
    html = urllib.request.urlopen(url)
    return BeautifulSoup(html, features="html.parser")

def get_images(url):
    soup = make_soup(url)
    # get all links (start with "a")
    images  = [link["href"] for link in soup.find_all('a', href=True)]
    # keep ones that end with png
    images = [im for im in images if im.endswith(".png")]    
    print (str(len(images)) + " images found.")
    print ('Downloading images to current working directory.')
    #compile our unicode list of image links
    for each in images:
        urllib.request.urlretrieve(os.path.join(url, each), each)
    return images

# #a standard call looks like this
get_images('https://omabilder.000webhostapp.com/img/')