How Golang Is Used For Web Scraping With Concurrency?
Concurrency is required to collect data from several sites and update it. In general, this could create a queue that would have to wait for each page to be completed before moving on to the next. Concurrency will allow you to scrape numerous sites at once. Data Flow Designs When scraping many websites, you must wait for each page to finish before moving on to the next. The Data Flow diagram shows how ordinary scraping works. On other hand, a web scraper may scrape several pages at the same time using parallelism in a single request. The Data flow below explains how this differs from traditional scraping. Use Cases There might be various reasons to employ concurrency when scraping. We will try to acquire historical exchange rates for a certain currency in this case. Extracting historical data for a month will require 30 queries, and the loading time will grow in proportion to the number of requests. Here, we will try to find a historical currency between two currencies with a certain cu...