Try to scrape image from image url (using python urllib ) but get html instead

问题

I've tried to get the image from the following url.

http://upic.me/i/fj/the_wonderful_mist_once_again_01.jpg

I can do right-click and save-as but when I tried to use urlretrieve like

import urllib
img_url = 'http://upic.me/i/fj/the_wonderful_mist_once_again_01.jpg'
urllib.urlretrieve( img_url, 'cover.jpg')

I found that it is html instead of .jpg image but I don't know why. Could you please tell me why does my method not work? Are there any option that can mimic right-click save-as method?

回答1:

You can use Requests, if you havn't installed yet, pip install requests

Because this img_url was redirected by the server to another html page ( that was the html page you just downloaded) if you didn't provide a referer header.

So the following code first find the redirect url, and add it to the HTTP Referer header.

import requests
img_url = 'http://upic.me/i/fj/the_wonderful_mist_once_again_01.jpg'

r = requests.get(img_url, allow_redirects=False)   #  stop redirect 302 , capture redirects url

headers = {}
headers['Referer'] = r.headers['location']    # add this url to referer 'http://upic.me/show/55132055'

r = requests.get(img_url, headers=headers)
filename = img_url.split('/')[-1]             # find the file name in `img_url`
with open(filename, 'wb') as fh:             # use 'wb' to write in binary mode
    fh.write(r.content)

回答2:

try like this:

import urllib2

image = urllib2.urlopen('http://upic.me/i/fj/the_wonderful_mist_once_again_01.jpg').read()
f = open('some_name.jpg','w')
f.write(image)
f.close()

来源：https://stackoverflow.com/questions/29433699/try-to-scrape-image-from-image-url-using-python-urllib-but-get-html-instead