The official version of Somao is a professional and practical web spider tool. The latest version of Socat can continuously crawl according to the hyperlinks in the web pages, download and write the web pages to local folders, or write them into the *. mdb database, which is very convenient and fast. The most important feature of Socat software is to analyze web pages. It can automatically grab the program or script of network information according to certain rules.
Introduction to Socat software
The software can only intercept a part of the web page (it can be a joke, a novel or even just the link address of a movie or MP3, depending on your configuration). With it, you can copy a website (or its link) in a few hours.
Description of Socat software
The description and definition of the crawl target is the basis for determining how to formulate the web page analysis algorithm and URL search strategy. Web page analysis algorithm and candidate URL sorting algorithm are the key to determine the service form provided by search engines and crawler web page crawling behavior. The algorithms of these two parts are closely related.
The description of the target crawler can be divided into three types: based on the characteristics of the target web page, based on the target data pattern, and based on the domain concept.
Based on the characteristics of the target web page
The objects crawlers crawl, store and index based on the characteristics of the target page are generally websites or pages. According to the method of obtaining seed samples, it can be divided into:
(1) Pre given initial grab seed samples;
(2) Pre given web page classification directory and seed samples corresponding to the classification directory, such as Yahoo! Classification structure;
(3) Grab target samples determined by user behavior are divided into: (a) Grab samples displayed during user browsing; (b) Access patterns and related samples are obtained through user log mining.
Among them, the web page feature can be the content feature of the web page, or the link structure feature of the web page, and so on.
Based on target data schema
Crawlers based on the target data pattern target the data on the web page, and the data captured should generally conform to a certain pattern, or can be converted or mapped to the target data pattern.
Based on domain concept
Another description method is to establish an ontology or dictionary of the target domain, which is used to analyze the importance of different features in a topic from the semantic perspective.
Installation steps of Socat
1. Download the official Socat installation package in the Huajun Software Park
2. After downloading, unzip the compressed package to a folder named after this software
3. Open the folder and double-click the "exe" program
4. Socat is green software, which can be used without installation
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