What is parsing and parser interests many people. Parsing should be understood as a process during which a certain document is analyzed from the perspective of vocabulary and syntax. Parser (syntactic analyzer) - a part of the program that is responsible for studying content in automatic mode and finding the necessary fragments.
What is parsing for?
Parsing allows you to process large amounts of information in the shortest possible time. This refers to a structured syntactic evaluation of data posted on Internet pages. Thus, parsing is much more efficient than manual labor that requires a lot of time and effort.
Parsers have the following capabilities:
- Updating data, allowing you to have the latest information (exchange rates, news, weather forecast).
- Collection and instant duplication of material from other sites for display on your Internet project. The material obtained through parsing is usually rewritten.
- Connecting data streams. A huge amount of information is received from various resources, which is very convenient when filling news sites.
- Parsing significantly speeds up the work with keywords or phrases. Thanks to this, it becomes possible to quickly select the necessary requests for the promotion of the project.
Parser types
Obtaining information on the Internet is a very difficult, routine and long-term procedure. Parsers are capable of processing, automating and sorting the lion's share of web resources in just a day in search of the information they need.
Parsing allows you to control the uniqueness of articles by quickly and accurately matching the content of thousands of Internet pages with the provided text.
Today, you can download or purchase a lot of effective scraping programs, including Import.io, Webhose.io, Scrapinghub, ParseHub, Spinn3r and others.
What is a site parser
The parser of sites is carried out according to the installed program, comparing certain combinations of words with what was found on the Web.
How to work with the received information is written in the command line, called "regular expression". It is formed from signs and organizes the search principle.
The site parser goes through several stages:
- Searching for the required information in the original version: acquiring access to the code of the Internet site, downloading, downloading.
- Obtaining functions from the code of a web page, with the extraction of the necessary material from the program code of the page.
- Creation of a report in accordance with the established requirements (recording information directly into databases, articles).
