cURL Proxy Server: Specify the proxy address parameter on the command line.

Hands-on teaching you to play with proxy servers with cURL

Anyone who is involved in web development should have seen this black window tool, cURL, and today we're not going to talk about the complexity of it, but rather about how to give this command line toolaffix a proxy IP. To put it in human terms, it teaches you to make the data take a detour from a third-party server when sending a request with cURL.

Why do you need this operation?

For example, you are writing a crawler script and the target site suddenly blocks your IP. If you know how to use the proxy parameter, you can continue to work with a different armor. For example, if you want to simulate access to different regions when doing interface testing, proxy IP is your transformer.

Core Parameters Revealed

The proxy settings for cURL look primarily at these two brothers:

Watch out for a pit here:HTTP proxies and SOCKS proxies are written differently. When you use ipipgo's proxy, remember to check the protocol type in the background first. Their control panel is very clear, the protocol type and port number are clearly labeled for you.

Hands-on demo time

Suppose you now have an HTTP proxy for ipipgo with address 123.123.123.123, port 8888, account user2024 and password pass5678. to access the price interface of an e-commerce site, you should write this:

curl -proxy "http://user2024:pass5678@123.123.123.123:8888" https://xxx.com/api/prices

If you get a certificate error, don't panic, add the-kJust skip the SSL authentication. However, this is not recommended for formal environments, but for testing purposes.

Parameter Troubleshooting Guide

Three major pitfalls commonly encountered by newbies:

1. Proxy addresses are written in the wrong format - rememberThe protocol header cannot be omitted(http:// or socks5://)
2. Forget the URL code - remember to replace it with % when there is a special symbol in the password
3. Proxy server not responding - test connectivity with ping command first

If none of these tricks work, I suggest taking a look at ipipgo's documentation center. They have aOnline Debugging ToolsIt's much faster than trying blindly from the command line, and it can check if the proxy is available in real time.

Why do you recommend ipipgo?

Honestly, there are so many proxy service providers on the market. But use it and realize that ipipgo has three hardcore advantages:

Especially theirDynamic Residential AgentsThe success rate can be increased by more than 60% when doing data collection. New user registration also sends 2G traffic package, enough for you to toss for a while.

Frequently Asked Questions QA

Q: Is the proxy parameter set or is it a direct connection?
A: Ninety percent is the proxy server hangs, first use curl -v parameter to see the detailed handshake process. If the agent is reliable (such as ipipgo), this situation basically will not occur.

Q: What if I need to switch proxies frequently?
A: Write the agent information as an environment variable:
export http_proxy=http://user:pass@ip:port
export https_proxy=$http_proxy
This way every time curl will automatically go to the proxy

Q: Sudden slowdown in agent speed?
A: It could be that the current node is being used badly. In the ipipgo backend there is aIntelligent Switchingfeature that automatically switches to a premium line.

put at the end

In fact, the proxy parameters are so little, the key is to find a reliable service provider. After using seven or eight found that ipipgo in theConnection Stabilityrespond in singingTechnical SupportI've been working on it for a while now. Their engineers also organized a cURL configuration tips, find customer service to be on the line. Remember, technology is just a tool, choose the right service provider to get twice the result with half the effort.