我正在尝试从网址列表中找到无法到达的网址。代码如下:
def sanity(url,errors):
global count
count+=1
if count%1000==0:
print(count)
try:
if 'media' in url[:10]:
url = "http://edoola.s3.amazonaws.com" + url
headers={'User-Agent': "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.84 Safari/537.36",
}
req=urllib.request.Request(url,headers=headers)
ret = urllib.request.urlopen(req)
return 1
except:
print(e, url)
errors.append(url)
return 0
limit=1000
count=0
errors = []
with open('file.csv','r',encoding="utf-8") as file:
text = file.read()
text = str(text)
urls = re.findall(r'<img.*?src=""(.*?)""[\s>]', text, flags=re.DOTALL)
arr = list(range(0,len(urls)+1,limit))
start=0
for i in arr:
threads = [threading.Thread(target=sanity, args=(url, errors,)) for url in urls[start:i]]
[thread.start() for thread in threads]
[thread.join() for thread in threads]
if i==0:
start=0
else:
start=i+1
print(errors)
with open('errors_urls.txt','w') as file:
file.write('\n'.join(errors))
该代码可以正常运行1000次,但是在我的Chrome浏览器中可以访问的下一千个打印网址中。我研究了this和others。我已经在ipython终端中尝试了这些方法,选择了特定的网址,并且效果很好。但是,当我对上面的代码使用相同的方法时。我得到了可访问的网址。我该如何解决?
网址数量约为15000。因此,在上面的代码中,我以1000个块运行,因此产生了1000个线程。
感谢您的帮助!