Reading JSON files as dictionaries in Python using proxy IPs

Hands-on teaching you to use proxy IP to process JSON data

Recently, a lot of small partners are asking, with Python to read JSON files have to engage in what proxy IP, here in fact there is a misunderstanding, we are not talking about reading local files directly, but through the network request to obtain remote JSON data, you need to use the proxy IP to protect the real address. Today we take ipipgo proxy service to give a chestnut, teach you how to safely and efficiently complete this operation.

Figuring out the basics of proxy IP configuration

First of all, there must be a reliable agent service, here are the recommendationsipipgoThe package. Their proxies support a variety of authentication methods, let's just choose the HTTP protocol. After you get the proxy information, memorize these three parameters:

Sample code

The following code demonstrates how to take a proxy to get remote JSON data. HighlightsProxies parametersThe setup is easy to step in the puddle here:

import requests
from json import JSONDecodeError

 Proxy configuration (remember to replace it with your own account)
PROXY_HOST = "proxy.ipipgo.com:9021"
PROXY_AUTH = "user:pass123"

def fetch_json(url).
    proxies = {
        "http": f "http://{PROXY_AUTH}@{PROXY_HOST}",
        "https": f "http://{PROXY_AUTH}@{PROXY_HOST}"
    }

    try: response = requests.get(url)
        response = requests.get(url, proxies=proxies, timeout=10)
        response.raise_for_status() automatically throws HTTP errors
        return response.json() directly to the dictionary
    except JSONDecodeError: print("JSONDecodeError").
        print("The interface returned a JSON structure that is not a proper JSON structure.")
    except requests.exceptions.ProxyError: print("The interface returned a JSON structure that is not proper.")
        ProxyError: print("Something went wrong with the proxy configuration, check the address or password.")

 Example of use
data = fetch_json("https://api.example.com/data")
print(data.get('result'))

Details that must be attended to

1. timeout settingNever forget! Some sites will deliberately slow down the response time, it is recommended to set it at 10-15 seconds
2. Encounter407 Agent Authentication ErrorFirst, check if the account password format is a user:pass splice.
3. When returning a large amount of data, remember to use thestream modeSegmented reads to avoid memory blowing up

Frequently Asked Questions QA

Q：Why can't I connect with ipipgo's proxy?
A: First check the whitelist settings, if it is terminal IP authentication, remember to bind the public IP of the device used in the background

Q: What should I do if there is an error in parsing the returned data?
A: first use response.text to print out the raw data, may be the interface returned is not standard JSON. you can also use jsonlint.com to verify the data structure

Q: What if I need to change agents frequently?
A: ipipgo's dynamic proxy pool can be specified directly in the request URL, for example, change the proxy address to auto.proxy.ipipgo.com, the system will automatically rotate IPs

Personal experience in the pits

When I first started using it, I always encounteredCertificate Validation FailureThe problem. It was later discovered that the protocols for proxy configuration were mixed up. If the target site is HTTPS, the proxy address must be configured using thehttp://It starts with (that's right, it's going to be http) and then automatically upgrades the encryption on request. This counter-intuitive setup pinged me all afternoon!

There were also times when I encountered a situation where the returned data had a BOM header, and parsing it directly with json() would report an error. Later, I added theresponse.encoding = 'utf-8-sig'before resolving it. These details are recommended to be handled ahead of time when wrapping the request method.

Last but not least, if it's too much trouble to maintain your own proxy IP, just go to theipipgoThe ready-made service saves a lot of heartache. They have a smart routing feature that automatically selects the fastest node, saving more time than tossing it yourself. New users can also sign up for a 3-day trial, which is perfect for testing code.