January 2019
Beginner
132 pages
3h 14m
English
Content preview from Go Web Scraping Quick Start Guide
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Conditions
Now that you are able to launch scraper tasks into multiple threads, some controls will need to be put into place so things don't get too out of hand. It is very simple in Go to launch 1,000 goroutines to scrape 1,000 pages simultaneously from a single program. However, your machine most likely cannot handle the same load. The sync package provides a few utilities to help maintain order in your web scraper.
One common control that you will want to put into place is the number of active concurrent scraping threads. Before you launch a new goroutine, you will need to satisfy a certain condition, being that the number of active threads is less than some value. If this condition fails the check, your new goroutine will have to wait, ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.