Curl Command Usage: cURL Proxy Command Parameter Guide

Teach you how to use cURL to hang a proxy to access the Internet.

Crawlers should be engaged in the old iron should understand, cURL this thing is like the Swiss army knife of the network world. Today we're going to talk about how to give itacting as agent, especially with ipipgo home premium IP resources. Remember this universal formula first:

curl -x [protocol]://[account]:[password]@[IP]:[port] destination URL

Take a real example: to use HTTP proxy to access a certain treasure, this is the whole thing

curl -x http://user123:pass456@1.2.3.4:8888 https://www.taobao.com

Troubleshooting of different proxy protocols

Nowadays, there are three types of mainstream proxies, corresponding to different usage scenarios:

Here's the kicker.Account Password AuthenticationThis pitfall: many people will writeuser:pass@ip:portThe result is an error, in fact, to put the special symbols with thePercentage code处理。比如密码里有@符号就得转成%40，这个细节不注意能卡半天。

Verify that the proxy is actually working

I'm going to teach you an old-fashioned way: visit an IP testing site and look at the results. Here we recommend using ipipgo's own detection interface, which is accurate and will not expose your privacy:

curl -x http://代理IP:端口 https://api.ipipgo.com/checkip

If the result shows the proxy's IP address, it means that theMatching value successfulIf you have a 407 authentication error. If a 407 authentication error is reported, it is 80% likely that the account password was entered incorrectly, or the package traffic ran out.

QA First Aid Kit

Q: What should I do if the request times out after the proxy is set?
A: First do not panic, in this order to check: 1. local network is normal 2. proxy IP whether the expiration date 3. fire whether the interception 4. contact ipipgo customer service to check the status of the port

Q: What if I need to switch between different IPs frequently?
A: It is recommended to use ipipgo's API to obtain IP dynamically, with shell scripts to realize automatic switching. Their extraction interface response speed thief, measured 1 second can change 3 IP.

Why ipipgo?

I'm sure you'll want to brag about your own products, but let's be honest: he's got a lot to offer.Dynamic Residential PackageStarting from $7+ 1G, it's cheaper than buying milk tea. Especially brothers who do data collection, supported by the Enterprise Edition packageconcurrent multi-openingThe efficiency of the crawler is directly doubled.

Focused functional delineation:
✔️ Global Operator Resources in 200+ Countries
✔️ Support HTTP/HTTPS/Socks5 full protocols
✔️ provides off-the-shelf code samples and client-side tools
✔️ Customized solutions can pinpoint city-level positioning

One last hidden trick: use-vParameters to view the detailed request process, you can clearly see the proxy connection status. If you encounter a problem, look at the log first, which is much more reliable than asking people everywhere.