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This article introduces python crawler using proxy IP request failure to do, the content is very detailed, interested friends can refer to, hope to be helpful to you.

Some users reported that they used the proxy IP during the crawler, but the request still failed. What is this all about? In fact, if the crawler uses improperly or uses low-quality proxy IP, it will lead to the above situation. Therefore, there is no need to panic when you encounter such a situation. We can take the following measures:

1. Slow down the crawling speed and reduce the pressure on the target site.

But it will reduce the number of crawls per unit time category, try the speed limit set by the website, and set a reasonable access speed.

2. Set the interval access. For the time interval of collection, you can first test the maximum access frequency allowed by the target site.

The closer to the maximum access frequency, the easier it is to encapsulate IP, which requires setting a reasonable time interval, which not only meets the acquisition speed but also is not limited by IP.

3. Using the highly anonymous proxy IP, sometimes it takes a lot of work.

For python web crawlers, distributed crawlers are the best way to improve efficiency. Like distributed crawlers, there is an urgent need for a large number of IP resources, this free IP can not be satisfied, and free agents usually do not provide highly anonymous proxy IP, so it is recommended that you do not use free proxy IP. Dragon HTTP agent highly anonymous IP can completely hide the user's IP information, so that the target site is not detected at all, which is very suitable for crawlers.

4. Multithreading crawling, multithreading technology aims to realize the synchronous processing of multiple tasks and improve the efficiency of the system.

Improve the utilization rate of the system. It is only implemented when a thread needs to complete multiple tasks at the same time. Even if you use multiple reptiles to grab at the same time. This is the same for human strength and reptile ability, which can greatly improve the crawling rate.

About the python crawler using proxy IP request failure to share here, I hope the above content can be of some help to you, can learn more knowledge. If you think the article is good, you can share it for more people to see.

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