Web Screen Scraping

Looking for the best way to finish web screen scraping within twenty-four hours? Web scraping or harvesting is, technically, any of the various methods by which one can extract content from a website over HTTP. This content is almost always changed into another format for use in another context, such as marketing. In this brief article, we’ll take a look at how you can most efficiently scrape web data, as well as the legal issues and technical scripting that may pose a problem to web scrapers.

The most common form of web screen scraping is the web crawler, used by such sites as Google. The most commonly seen use for web scraping is the scraper site, a website in which none of the content is original, and all information is taken from existing websites. The best way to scrape data is with one of the many online programs, which generally range from personal to corporate. Personal data scraping programs can be free or cheap, while corporation-grade scrapers can run upwards of thousands of dollars. Scrapers basically work by going over a website and collecting relevant data from any number of fields, be it simple text or e-mail addresses and phone and fax information.

Common legal issues with web screen scraping are invasion of privacy and violation of terms of use. Certain publication licenses like Creative Commons allow reproduction of material, and a recent lawsuit ruled that reproduction of facts was not a legal violation, but the web scraper must be careful what he or she chooses to reproduce. Gathering personal information like phone and fax data and e-mail addresses can be an invasion of privacy if the user is not informed, or if the information is improperly used, so some sort of agreement must be made by the user upon collection, otherwise serious legal action may, in some cases, be taken by the user.

There are certain ways to avoid web screen scraping, of which anyone who wants to scrape should be aware. Some sites will block scrapers’ IP addresses and some will have entries in robots.txt. Some sites will block bots based on what they declare themselves to be (though poorly-behaved crawler robots might list themselves as actual users). Excess traffic monitoring and verification programs can also block crawlers. Being aware of these obstacles and having a legitimate way to overcome them is very helpful to anyone trying to scrape information.

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