Crawling has become a well-known term in today's popular internet, relying on script files. Developers write code based on certain logic to crawl information from the World Wide Web according to predetermined rules.

Web crawlers are actually using scripts to access a large number of web pages in a short period of time, tracking scripts to specify specific targets, and crawling information. But because the browser has a limit on the frequency of accessing the same IP address at a fixed time, the restriction is to prevent errors caused by excessive server running pressure. At this point, in order to lift restrictions and quickly obtain data, proxy IP becomes the preferred choice for web crawlers. ISPKEY's overseas agents have a massive number of dynamic residential IPs, with IP proxy pools spread across the world, providing strong technical support for web crawlers.

IP proxies provide flexible IP addresses for web crawlers, and by constantly changing IP addresses, prevent the occurrence of anti crawling mechanisms that touch the server. The details are as follows.

Obtain the address and port number, which refers to obtaining the API link IP address

def get_ip_list():

url=”XXX”

resp=requests.get(url)

//Extract page data

resp_json=resp.text

Convert JSON string data to a dictionary

resp_dict=json.loads(resp_json)

ip_dict_list=resp_dict.get(‘data’)

Extract data from the data string

return ip_dict_list

Some non IP whitelisted IPs require user password verification, and API links will encrypt usernames and passwords. If necessary, code verification encryption is required.

Send a request to the target website to obtain relevant data. If successful, access the response information; if unsuccessful, print the result

Def spider_ip (ip_port, URL)://The actual URL address to be requested

headers1 = {

"User-Agent": 'XXX'

//Browser Information

}

headers = {

'Proxy-Authorization': 'Basic %s' % (base_code(username, password))

//User name+password

}

//Place the proxy IP address in the proxy parameter

proxy = {

'http':'http://{}'.format(ip_port)

}

//Send network request

Request successful

try:

reap = requests.get(url, proxies=proxy,headers=headers,headers1=headers1)

//Parsing Access Data

result = reap.text

//Sending failed, printing this agent is invalid

except:

Result='This agent is invalid'

That's all for the introduction of this article. For more IP information, please look forward to the following text.