Proxy IP sends cURL POST request: cURL is submitted using proxy IP POST

Figuring out the relationship between proxy IPs and cURLs

We usually use cURL to send a POST request like a courier.Proxy IP is to help you change the shipping address on the delivery noteThe first thing you need to do is to test your website interface. For example, if you want to test the website interface, directly use your own IP to send a wild request, or maybe it will be blocked. This time with ipipgo's proxy IP, equivalent to every time you send a courier to change a different courier point, the other side simply can not feel the real source.

curl -x http://user:pass@proxy.ipipgo.com:8080
-X POST https://api.example.com/login
-d "username=test&password=123456"

In this example, theThe -x parameter is the key to specifying the proxy server. Note that the proxy address for ipipgo should be filled in for your own account in the formatUsername:Password@Proxy Server Address:PortThe first thing you need to do is to check for formatting errors. Many newbies fall prey to formatting errors, so be sure to check that you haven't missed the @ symbol or the port number.

A practical guide to avoiding the pit

The table below is a cross-reference of common mistakes, save it for less:

Special note: When sending POST with a proxy IP, theBe sure to add the -proxy-anyauth parameterOtherwise, you will encounter strange authentication problems. This detail is not necessarily written in the official documentation, but the actual test eight out of ten times works.

Why ipipgo?

There are a bunch of proxy providers on the market, but it's still a hard sell to do tech docking. ipipgo has three killer features:

1. exclusive IP pool: Each user is assigned an independent resource, so you won't be dragged down by the next user.
2. Millisecond switching: automatically rotate IPs when sending requests, no need to manually change the configuration
3. Full protocol support: HTTP/HTTPS/Socks5 full compatibility, especially to handle HTTPS requests without dropping the chain!

Their API access documentation is written in the vernacular, just copy it and you can use it. Unlike some platforms, the documentation is written like a book, and the configuration of a proxy can be tossed around all day.

Questions you might ask

Q: Does proxy IP affect the request speed?
A: With ipipgo's high quality lines, the delay is basically within 200ms. If you find that it becomes slow, it is recommended to cut to a node closer to the target server

Q: How can I tell if a proxy is in effect?
A: Measure with this command first:curl --proxy http://代理IP -L http://ip.ipipgo.comIf the returned IP is not local, it means it's successful.

Q: How long does a proxy IP last?
A: ipipgo's short-lived proxy default 15 minutes, long-lived can be used for 1 month. To do crawlers suggest using dynamic pools, automatic IP change to save

High-level play: automatic IP rotation

Use shell script to realize automatic IP switching, suitable for scenarios that require a large number of requests:

! /bin/bash
API_URL="https://api.ipipgo.com/getproxy"
PROXY_LIST=$(curl -s $API_URL | jq -r '.proxies[]')

for PROXY in $PROXY_LIST; do
  curl -x $PROXY
  -X POST https://target.com/api
  -d "data=example"
  sleep 5 Control request frequency
done

This script first calls the ipipgo API to get a list of the latest proxy IPs, and then sends requests using each IP in turn. Note thatControl request intervalIf it's too frequent, even the best agents can't carry it.

One last thing: Proxy IP is not a panacea, but a reasonable timeout and error retry mechanism is the way to go. If you encounter problems, check ipipgo's status monitoring page, their node status is updated in real time, better than blindly.