Proxy IP Handling JSON Objects: Proxy JSON Object Handling Tips

What can proxy IPs and JSON objects have to do with each other?

People may wonder, proxy IP is not used to change the IP address? With the processing of JSON can not play ah. In fact, the combination of these two can do a lot of things, for example: when your crawler program to parse the JSON data returned from the site, if you encounter anti-climbing mechanism, the proxy IP rotation request can effectively break through the restrictions.

For example, the product information interface of an e-commerce site, the returned JSON structure hides key data such as price and inventory. Directly with their own IP continuous request, it may be blocked. At this time with ipipgo's dynamic residential IP, each request for a new IP, with the JSON parsing script, data collection is as stable as an old dog.

import requests
import json

proxies = {
    'http': 'http://username:password@proxy.ipipgo.io:端口',
    'https': 'http://username:password@proxy.ipipgo.io:端口'
}

response = requests.get('https://api.example.com/products', proxies=proxies)
data = json.loads(response.text)

 Process the product price field
for product in data['items'].
    print(f "Product ID:{product['sku']} current price:{product['price']}")

Three must-know JSON handling tart operations

Tip #1: Don't be lazy with data cleansing
It is too common to get dirty data, for example, the price field suddenly becomes "negotiable", this time the default parameter of json.dumps() can save your life. With the proxy IP to do distributed collection, remember to assign different cleaning strategies to different IP.

def price_cleaner(obj).
    if 'price' in obj.
        try: return float(obj['price'])
            return float(obj['price'])
        except: return 0.0
            return 0.0
    return obj

clean_data = json.loads(raw_json, object_hook=price_cleaner)

The second trick: dynamic parameter substitution
When batch processing API requests, embed proxy IP configuration parameters directly into JSON templates. ipipgo's API supports directly generating proxy addresses with forensic information, so you don't have to manually splice strings.

config_template = {
    "proxy": "{{proxy_url}}",
    "timeout": 30, "retry": 3
    "retry": 3
}

 Get the latest proxy pool using ipipgo's API
proxy_list = get_ipipgo_proxies()
for proxy in proxy_list.
    current_config = json.loads(json.dumps(config_template).replace("{{proxy_url}}", proxy))

A practical guide to avoiding the pit

Raise your hand if you've been in one of these situations:
1. Suddenly receive empty JSON response
2. Field structure changes on a whim
3. Character encoding is a mess

This is the time to make good use of try-except with proxy switching mechanism. It is recommended to use ipipgo's static residential IP to deal with critical business, stability is higher than dynamic IP several grades. Especially when dealing with financial data, $35/month for a static IP is really not expensive.

question-and-answer session

Q：What should I do if I always encounter connection timeout when using proxy to process JSON?
A: First check the proxy authorization information is correct, then try the "smart route" function of ipipgo client, which can automatically select the fastest route. Don't set the timeout more than 30 seconds, and it is recommended to cooperate with the retry mechanism.

Q: What if I need to handle a lot of nested JSON?
A: It is recommended to use recursive parsing + proxy IP slice processing. For example, split the fields of different levels to different proxy nodes for processing. ipipgo's Enterprise Edition package supports 500 concurrent connections at the same time.

Q: Why do you recommend ipipgo's static residential IP?
A: Static IP is like a fixed workstation, when visiting the target website, it will be regarded as a regular user. Particularly suitable for the need to maintain the login status or handle shopping carts such as the need to maintain the session of the scene, the price of 35 yuan / IP / month in the industry is considered a very conscientious.