curl data transfer: POST/PUT request example

Hands-on teaching you to use proxy IP to play with curl POST/PUT request

Many people use curl to send data requests, often stuck in the proxy IP configuration of this link. Today we will usewritings in the vernacularLet's talk about how to use ipipgo's proxy service to make data transfer both stable and fast. First of all, let's throw cold water on the fire - nine times out of ten, all the tutorials on the Internet have even misspelled the proxy parameters!

Basic equipment: curl proxy triple axe

To get curl to take the proxy channel, these three parameters must be soldered into the command:

-x http://用户名:密码@proxy-address:port
--proxy-insecure
--connect-timeout 30

As a chestnut, use ipipgo's Dynamic Residential Proxy (their long-lived nodes live for 24 hours):

curl -x http://user2024:8sdf7a@gateway.ipipgo.com:9024
--proxy-insecure
--connect-timeout 30
https://api.example.com

special attention: Don't use the -proxy parameter, that's for socks proxies, http proxies must use -x!

Practical POST requests: simulating form submission

Suppose you want to pass user data to a website, and bring a proxy IP to operate like this:

curl -X POST
-x http://user2024:8sdf7a@gateway.ipipgo.com:9024
--proxy-insecure
-H "Content-Type: application/json"
-d '{"username": "test_user", "age":28}'
https://api.example.com/users

Here is a pitfall: the quotes in the json data should be wrapped in single quotes, otherwise the linux system will report an error. Use ipipgo'sBeijing BGP NodeThe delay can be compressed to less than 80ms.

PUT Request Advanced: File Upload Tips

For file operations such as updating a user's avatar, the PUT request should be paired with a proxy in this way:

curl -X PUT
-x http://user2024:8sdf7a@gateway.ipipgo.com:9024
--proxy-insecure
-F "avatar=@/path/to/photo.jpg"
https://api.example.com/users/123/avatar

Remember to turn it on when transferring large fileslong connection modeThe Shanghai server room of ipipgo supports TCP Keep-Alive, which is more than 3 times faster than normal proxy.

Common Rollover Scene QA

Q: What can I do if the agent can't connect?
A: First check the whitelist - ipipgo console to add the local IP. and then try a different protocol: replace http with https to try!

Q: POST request returns 403?
A: Ninety percent is that the header is not full! Use ipipgo's request analysis function to see if there is anything missing in the original request header.

Q: Uploading files always timeout?
A: Set the -connect-timeout to 60 while switching to ipipgo'sEnterprise Class Dedicated LineQoS Traffic Assurance

Proxy IP Selection Guide

Finally, a big truth: don't trust those free proxies that don't even have basic data encryption. ipipgo'sBi-directional SSL tunnelsThe entire transmission process is encrypted, which is the proper posture for data.