cURL Setting Proxy: Command Line Configuration of HTTP/SOCKS Proxy

Teach you how to use cURL to hang a proxy!

Web developers should have encountered the need to debug the interface, right? This time cURL is definitely a good helper you can not do without. But if you encounter some site access restrictions, or need to simulate different regions of the user access, we have to call out our secret weapon - proxy IP. Today we will takeipipgoThe proxy service to give a chestnut, hand in hand to teach you how to play in the command line proxy settings.

Let's see if cURL is installed.

Before you start, make sure you have cURL installed on your computer. open a terminal and hitcurl -versionIf you can't find the command, go to the website and download a binary package. If you can't find the command, Windows users can go to the website and download a binary package, and Mac users can just use brew install curl.

HTTP Proxy Setup Trilinear

Assuming that you've already started with theipipgoGetting the proxy address (e.g. proxy.ipipgo.com:8000) was as easy as drinking water to set up:

curl -x http://username:password@proxy.ipipgo.com:8000 https://目标网址

There are three key points to note here:
1. -xParameters must be followed by a protocol header (http://)
2. Remember to escape % if the account password contains special symbols.
3. Proxy server address must not write the wrong port number

SOCKS agents save more

When you need to go socks protocol, just replace the http above with socks5:

curl --socks5 username:password@proxy.ipipgo.com:1080 https://目标网站

Here's an easy one to plant - the difference between socks5 and socks5h. Simply put, a suffix with an h will let a proxy server help resolve the domain name, which is suitable for certain cases where DNS is restricted.

Great job on the environment variables!

If it's too much of a hassle to type the command every time, you can set an environment variable to do it once and for all:

export http_proxy=http://user:pass@proxy.ipipgo.com:8000
export https_proxy=$http_proxy

After this setting, all requests that go http/https will be automatically proxied. However, you should remember to cancel the setting in time after the test, otherwise it may affect other network operations.

Common Rollover Scene QA

Q：Why can't I connect even after setting up the proxy?
A: First, check the three-piece suit: whether the network is smooth, whether the account is valid, and whether the fire prevention is released. This can be done withcurl -vWatch the handshake in detail

Q: What if I need more than one agent at the same time?
A: RecommendedipipgoDynamic Proxy Pooling Service, which supports on-demand IP switching, saving you a lot of work compared to manual switching.

Q: What's the best way to test if a proxy is working?
A: Direct accessipipgo</strong's IP detection interface. If the IP address returned is a proxy address, it means it's successful.