Curl POST file data: Curl proxy POST file uploads

Teach you how to upload files with proxy IP by hand

Engaged in web development understand, with Curl file transfer is like sending a courier, but directly exposed to the home address (real IP) is always unsafe. This timeproxy IPIt's like a professional collection point that protects privacy and improves efficiency. Today we focus on how to use ipipgo's proxy service to play around with Curl file uploads.

Why do you need a proxy to transfer files?

For example, if you upload pictures to 10 different websites and use the same IP, the servers may think that you are a robot. ipipgo's proxy IP pool has millions of addresses, so every time you change your "armor" to send files, you can avoid being blocked and increase your success rate. The actual test found that the use of high-quality proxy upload speed can be 2-3 times faster, especially when the transmission of large files is particularly obvious.

Specific operation of the three axes

Step 1: Get your stuff ready

 Normal upload command
curl -F "file=@test.zip" http://目标网站.com

 Add the ipipgo proxy pose
curl -x http://user:pass@gateway.ipipgo.io:9023 -F "file=@test.zip" http://目标网站.com

Pay attention to the proxy address format, ipipgo username and password do not write directly into the code, it is recommended to use environment variables stored in a more secure.

Step 2: Check the network posture

• Make sure the proxy port is not blocked by firewall (ipipgo uses ports 9023/9024 by default)
• Remember to add a timeout parameter for transferring large files: -max-time 600
• Try the -k parameter if you have problems with SSL certificates

Step 3: Real-world verification

 Example of an upload with a progress bar
curl -x http://user:pass@gateway.ipipgo.io:9023 -F "file=@4k_video.mp4" --progress-bar http://upload.site/api | tee log.txt

Common pitfalls QA

Why ipipgo?

The project's own measured data: 100 consecutive transmission of 500MB file, the success rate of ordinary agents only 72%, change ipipgo high stash of agents directly to 98%. They have two masterpieces: ① dynamic adjustment of the bandwidth mechanism, transmission of large files are automatically assigned to the high-speed channel ② automatic error retry function, more reliable than manually write a retry script.

Advanced Player Tips

This is how you can play when you need to pass multiple files at the same time:

 Batch Upload Script Template
for file in .log; do
  curl -x http://user:pass@gateway.ipipgo.io:9023 -F "file=@$file" http://backup.server &
done
wait
echo "All files have been uploaded!"

Remember to add & to the loop to let the task run in the background, and wait with wait at the end to wrap it up. ipipgo's proxy supports 100,000 concurrent connections, and is perfectly capable of holding this kind of operation.

Finally, a cold knowledge: when you pass the file, add a X-Forward-For parameter in the Header, and use it with the proxy IP to make the target server believe that you are a real person. The best way to do this is to use ipipgo's residential proxy, which has been tested to be effective!