curl with request body POST: Send JSON data example

Teach you how to use curl to send JSON data, with proxy IP is more stable!

When we do interface debugging, we often use the POST method to pass JSON data. Today take curl as a chestnut, teach you how to play around with this operation in the command line, by the way, how to use theProxy IP for ipipgoto protect the real server address.

Why do I need a proxy IP to send a request?

To cite a real scenario: you are debugging an e-commerce platform's commodity price comparison interface, frequent requests are easy to be blocked by IP.Dynamic proxies for ipipgoThe IP is automatically switched with each request to protect the machine and avoid being restricted.

curl -x http://user:pass@proxy.ipipgo.cc:8080
-H "Content-Type: application/json"
-d '{"product_id":123, "price":99.9}'
-X POST https://api.example.com/price

Note these three key points:
1. -x parameterSpecify the proxy server (here the address provided by ipipgo)
2. -H parameterMust be set in json format
3. -d parameterDirectly follow the json content

Common Rollover Scene QA

Q: What should I do if I return a 407 agent authentication error?
A: Check whether the account password of ipipgo background is filled in correctly, pay special attention to the special symbols to use the URL code

Q: What about double quotes in json data?
A: Escape with a backslash, for example:

'{"message": "This is an "important" notice"}'

Parameter comparison table

Advanced Tips: Automatically Switching IP Pools

With ipipgo.Polling Agent Package, you can batch test interfaces like this:

for i in {1..10}
do
  curl -x http://user:pass@rotate.ipipgo.cc:8888
  -d '{"page":'$i'}'
  -X POST https://api.example.com/list
done

This script will automatically switch 10 different IPs to collect data, effectively avoiding the anti-climbing mechanism.

Why ipipgo?

Three solid points from over two years of experience in my own home:
1. Responsive enough，国内平均＜80ms
2. High IP survival rateThe measured 24-hour survival rate is 92% or more.
3. Package FlexibilityThe packages range from pay-as-you-go to monthly packages.

Finally, a reminder for newbies: don't use the proxy package of the production environment when testing interfaces, first use theipipgo's experience packageIt is more cost-effective to practice and wait to figure out the rules before going on the high-traffic package. When you encounter technical problems directly to their customer service, the response time is much faster than most of their counterparts.