cURL request parameters: cURL proxy request parameter optimization guide

Hands-on teaching you to play proxy IP with cURL

The old iron people who engage in network requests know that cURL is like our Swiss army knife. But many people use proxy IP always step on the pit, either timeout or anti-climbing. Today we do not talk about false, directly on the practical skills, and by the way, the good use of their own!ipipgoAgency services.

First, the correct opening posture of the proxy IP

Let's look at a typical error demonstration first:

curl -x 123.123.123.123:8080 https://example.com

Writing it that way works, but it's like driving a manual car without shifting gears - it costs gas and hurts the car. The optimized position should be:

curl -x socks5://user:pass@123.123.123.123:1080
--connect-timeout 15
--max-time 30
-H "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64)"
https://example.com

Focused Explanation:

1. Protocols should be written in full (socks5:// is more reliable than just writing the IP)
2. Timeout setting is divided into two phases: connection/transmission
3. UA header disguised as a real browser

Second, the three major tricks of parameter tuning

First move: timeout control

A lot of people get stuck on timeout settings, remember this golden combination:

--connect-timeout 10 Handshake wait up to 10 seconds
--max-time 60 The entire request should take no more than 1 minute.
--retry 2 Failure is automatically retried 2 times.

Tip #2: Requesting Camouflage

Remember to add these headers when using ipipgo's Dynamic Residential IP:

-H "Accept-Language: en-US,en;q=0.9"
-H "Referer: https://www.google.com/"
--compressed Enable compressed transmission

Tip #3: Large File Transfer Tips

curl -x http://ipipgo_proxy:port
--limit-rate 500K limit to prevent blocking
-C - Supports intermittent uploading
-O https://example.com/bigfile.zip

III. Guidelines for demining common problems

Q: The proxy setting is successful but it doesn't take effect?
A: First remove the proxy parameters directly request, if you can still access the success, that is not at all go proxy. Check whether the IP port is alive or not, we recommend using ipipgo client'sOne-Click TestingFunction.

Q: What should I do if I encounter a 407 agent authentication error?
A：密码里有特殊符号时要用URL编码，比如@符号要写成%40。用ipipgo的API ExtractionThe links generated by the function handle these automatically.

Q: What should I do if my overseas website access is super slow?
A: change ipipgo'sTK Linepackage, the measured latency can drop 60% or more. Remember to specify the socks5 protocol in the code:

-x socks5://tk line exclusive IP:port

Fourth, ipipgo practical program recommendations

Recently helped customers debug a typical case: a cross-border e-commerce business ordinary agent was blocked 30 times per hour, replaced with ipipgo'sStatic Home PackageAfter, with our customized solution, it ran stable for 72 hours straight away.

One last piece of trivia: cURL's -proxy-anyauth parameter automatically selects the authentication method to use in conjunction with ipipgo'sIntelligent Routingfeature that automatically matches the fastest routes. This combo technique is unknown to many veteran drivers, so hurry up and take it!