HTTP Proxy Cache Troubleshooting | HTTP Proxy Cache Exception Solution Collection

How to quickly identify HTTP proxy caching issues?

When using proxy IPs, you often encounter situations where web content is not updated and data loading is abnormal. This type of problem 80% is related to the proxy caching mechanism. When multiple users access the same URL through the same proxy IP, the server may return cached content instead of the latest data. It is recommended to first pass thetime-stamping test methodVerification: Add a random parameter at the end of the request URL (e.g. ?timestamp=123456) and observe if the return result changes.

Dynamic IP Rotation Cracks the Caching Dilemma

Fixed proxy IPs are prone to triggering the caching mechanism of the target website, resulting in the acquisition of stale data. ipipgo provides theDynamic Residential Proxy IPSupports automatic IP address switching, using different exit nodes for each request. This rotation mechanism can effectively bypass the server cache identification, especially suitable for scenarios that require real-time data collection. In practice, it is recommended to set an IP replacement interval of 2-5 minutes to avoid triggering the security mechanism by frequent switching.

Precise control of request headers to prevent cache interference

Some websites have caching mechanisms that check HTTP headers. Configuration via the ipipgo proxy serviceCustomized request headers, which can significantly reduce the cache hit rate. Focus on modifying the following parameters:
- Cache-Control: no-cache
- Pragma: no-cache
- Delete If-Modified-Since field
In practice, it is recommended to use developer tools to grab the original request header and compare the differences before and after the proxy.

Session Hold and Cache Clearing Tips

Caching issues may cause session anomalies when you need to stay logged in. ipipgo'sSession-holding agentsSupport for binding specific IPs to handle complete business processes. Suggestions at critical operation nodes (e.g. before submitting a form):
1. Clear the local DNS cache
2. Send an empty POST request to refresh the server-side cache.
3. Pre-checking the status of resources using the HEAD methodology

Frequently Asked Questions QA

Q: Why do I still get the old data after changing the proxy IP?
A: may encounter ISP-level cache or CDN cache, it is recommended to replace the User-Agent and add random request parameters at the same time

Q: How to verify whether the proxy IP is with cache?
A: via ipipgoReal-Time Response Detection InterfaceCompare the difference in response to the same request from different IPs.

Q: How to deal with the delay of API interface data update?
A: Enable ipipgo'sMixed multi-geographic requestsFunctionality to initiate requests from different geographic nodes to break through regional caching limitations

Intelligent Cache Policy Configuration Solution

For enterprise level users, ipipgo offersIntelligent Routing System, automatically selects the proxy node with the least cache interference. The system makes decisions based on the following dimensions:
- Fluctuations in response time of target websites
- HTTP Status Code Distribution
- Content similarity threshold
Dynamically adjusting the proxy policy through machine learning can reduce the cache interference problem of 90%. It is recommended to use with request interval randomization (0.5-3 seconds) for better results.

By combining the above methods with ipipgo's global residential IP resource pool, all kinds of proxy caching problems can be effectively dealt with. It is recommended to choose a combination of 2-3 programs according to the actual business scenarios, and regularly pass theProxy Health CheckerMonitor the level of cache impact and adjust response strategies in a timely manner.