At present, there are many software and tutorials about crawlers on the Internet, but it is not easy to choose a good collection tool.
I don’t recommend that you use online crawler tutorials and source code, not that they are not good, but crawler tutorials generally take a long time, and you need to learn the corresponding programming code, etc., and the crawler code is in the actual collection process There are often many problems. If you can't write code, basically this crawler program is useless. Therefore, a good crawler software or collection tool is still necessary, so how to choose?
1. The scope of collection
A good crawler software must be able to collect data on most websites, otherwise you will not have any preparation. As a result, your software cannot collect the information on this website, which is a tragedy.
2. The operation is simple and the
use should be simple and convenient. No matter how powerful a software is, there is no use for it if you can’t use it. A good software can do it even if you don’t learn programming knowledge and don’t understand the code information. Still does not affect the use. Cheese HTTP software does not require you to learn related technologies, even if you are a novice web page knowledge, you can still operate, and many other software on the market require you to have certain technical knowledge and code knowledge.
3. The number of ips
In most cases, what we collect is not only the information of a website, but also the challenge of big data and big data collection, which requires our ip system to support such large-scale collection. Imagine that if you need to collect several or even dozens of hundreds of websites, a few IPs are not enough to support our work. Sesame HTTP software can provide a large number of IP resources to meet your needs.
Many websites have set up anti-crawler programs to prevent malicious collection, which may cause the current IP to be unavailable. If there are not enough IPs, your collection process will be difficult to continue. Therefore, a new IP address is needed to support your work, but At present, many softwares do not provide ip resources, or the quality of ip resources is not good.
Of course, everyone has different collection requirements, and you need to choose crawler software according to your actual needs, but there are some basic measurement standards that you need to have.