POST request curl: Command Line Data Submission

Teach you how to play with curl POST request + proxy IP

Recently, a lot of friends asked Lao Zhang, using curl to send POST request always encounter network jam, especially when you need to operate frequently. Today let's talk about how to use proxy IP tosteady as a dogGround hair data, incidentally, a reliable tool ipipgo.

Basic operations of curl sending POST

Let's start with the basics. curl is like the Swiss Army Knife of the web, and the basic format for sending a POST request looks like this:

curl -X POST
  -d 'username=zhangsan&password=123456'
  https://example.com/login

Watch this.-X POSTSpecify the request method.-dfollowed by the data to be transferred. If the amount of data is large, it is recommended to store the parameters in a file and call them with the @ symbol:

curl -X POST -d @data.json https://example.com/api

Putting a proxy vest on curl

The point is! Proxy IP is your savior when you need to operate in bulk or when the target website has access restrictions. ipipgo's proxy configuration is super simple, follow this template to change:

curl -x http://user:pass@proxy.ipipgo.com:9023
  -X POST
  -H "Content-Type: application/json"
  -d '{"action": "update", "id":10086}'
  https://target-site.com/api

here are-x parameteris the proxy switch, ipipgo's address format ishttp://用户名:密码@proxy-address:port. Their agent pool is updated quickly, and real-world peak times are kept90%+ availabilityThe

Trifecta of combat techniques

1. Automatic IP Change Script: With ipipgo's API to dynamically obtain proxies, make a loop script to automatically switch, anti-blocking magic weapon!

! /bin/bash
for i in {1..10}
do
  proxy=$(curl -s ipipgo.com/api/getproxy)
  curl -x $proxy -X POST -d "page=$i" https://data-collector.com
done

2. The Great Disguise: With the addition of a random User-Agent header, ipipgo's residential proxy is better suited for this scenario

curl -x http://ipipgo.proxy:9023
  -H "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) ..."
  -X POST ...

3. Debugging Essentials: Add the -v parameter to see the detailed communication process, and troubleshoot the problem by yourself first.

White QA time

Q: Is it okay to use a free proxy?
A: Temporary test can be, but long-term use of recommended ipipgo such professional services. Free proxy often dropped not to mention, there is a risk of data leakage, do not lose a lot of money for small reasons.

Q: Error when POST data is large?
A: Two options: 1) change the -data-binary parameter 2) let ipipgo tech support open a high traffic channel

Q: How can I tell if a proxy is in effect?
A: First visit http://ip.ipipgo.com/checkip to see if the returned IP is a proxy address

As a final word of caution, choosing a proxy service depends on theresponsivenessrespond in singingafter-sales service. Like ipipgo this can 7 × 24 hours technical support, with really save heart. Their recent new dynamic port function, the same IP can cut different ports, anti-blocking effect directly doubled, there is a need to go to the official website to get a trial.