cURL for REST API: cURL call REST API

Hands-on with cURL to play with API requests

engaged in the development of small partners should have encountered such a situation: the local debugging interface can not be adjusted, the server does not recognize your request. At this timeproxy IPWill be able to come in handy. Let's not talk about those false today, directly on the actual case.

Let's start with a basic cURL command:

curl -X GET https://api.example.com/data

Although this command is simple, but if you encounter the target site to limit the number of IP access, minutes will be pulled black. This time, add a-xparameters, instantly solving the problem:

curl -x http://username:password@proxy.ipipgo.cc:8000 https://api.example.com/data

The right way to open a proxy IP

Many newbies tend to fall into the pit of proxy authentication. Pay attention to this format:Username:Password@Proxy Address:PortThere should never be a space in between. For example, let's sayipipgoThe proxy configuration should look like this:

If you get an error with your SSL certificate, remember to add the-kparameter skips validation:

curl -k -x http://user:pass@proxy.ipipgo.cc:8001 https://secure-api.com

Troublesome maneuvers in the real world

1. timeout control: Put a safety pin on the request. It's automatically abandoned after 5 seconds.

curl --max-time 5 -x http://proxy.ipipgo.cc:8000 https://slow-api.com

2. Masquerade request header: Some APIs check for User-Agents.

curl -H "User-Agent: Mozilla/5.0" -x http://proxy.ipipgo.cc:8000 https://api.com

The pitfalls you're bound to encounter

Q: Why does it return 407 Agent Authentication Error?
A: Ninety-nine percent of the account password is wrong, or did not bring the authentication information. Check to see if you have putusername:passwordIt's written asusername/password

Q: How can I view detailed request information?
A: Plus-vParameters, even the handshake process can be seen clearly

Q: What scenarios are ipipgo's agents suitable for?
A: Our proxy pool covers 300+ cities nationwide, especially suitable for data collection, price monitoring and other businesses that require high-frequency API calls, and each request can be exchanged for a different export IP.

Advanced Tips

This can be combined with the xargs command when requests need to be processed in bulk:

cat urls.txt | xargs -I{} curl -x http://proxy.ipipgo.cc:8000 {}

One last tip: useipipgoWhen rotating proxies, it is recommended to set up logic in the code to automatically change IPs. This is not easy to trigger the wind control, but also to ensure the stability of the request. Specifically how to realize? Let's talk about it next time!