January 2019
Beginner
132 pages
3h 14m
English
Content preview from Go Web Scraping Quick Start Guide
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Example – Doctype check
Another useful method in the strings package is the Contains() method. This is used to check for the existence of a substring in a string. For example, you could check for the HTML Version used to build a web page similar to the one given here:
package mainimport ( "io/ioutil" "net/http" "strings")func main() { resp, err := http.Get("https://www.packtpub.com/") if err != nil { panic(err) } data, err := ioutil.ReadAll(resp.Body) if err != nil { panic(err) } stringBody := strings.ToLower(string(data)) if strings.Contains(stringBody, "<!doctype html>") { println("This webpage is HTML5") } else if strings.Contains(stringBody, "html/strict.dtd") { println("This webpage is HTML4 (Strict)") } else if strings.Contains(stringBody, ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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