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Removing script tags from HTML
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| package main | |
| import ( | |
| "bytes" | |
| "fmt" | |
| "golang.org/x/net/html" | |
| "log" | |
| "strings" | |
| ) | |
| var s = ` | |
| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <script type="text/javascript" async="" src=""></script> | |
| <script src=""></script> | |
| <script type="text/javascript" async="" src=""></script> | |
| <script type="text/javascript" async="" src=""></script> | |
| <script src="" async=""></script> | |
| <script async="" src=""></script> | |
| <script type="text/javascript" async="" src=""></script> | |
| <script async="" src=""></script> | |
| <link rel="stylesheet" media="screen" href=""/> | |
| <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/> | |
| <style type="text/css">.at-icon{fill:#fff;border:0}.at-icon-wrapper{display:inline-block;overflow:hidden}</style></head><body></body></html>` | |
| func main() { | |
| doc, err := html.Parse(strings.NewReader(s)) | |
| if err != nil { | |
| log.Fatal(err) | |
| } | |
| var content bytes.Buffer | |
| removeScript(doc) | |
| html.Render(&content, doc) | |
| fmt.Printf("%s\n", content.Bytes()) | |
| } | |
| func removeScript(n *html.Node) { | |
| // if note is script tag | |
| if n.Type == html.ElementNode && n.Data == "script" { | |
| n.Parent.RemoveChild(n) | |
| return | |
| } | |
| // traverse DOM | |
| for c := n.FirstChild; c != nil; c = c.NextSibling { | |
| defer removeScript(c) | |
| } | |
| } |
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Thanks for the comment and for the link to the informative article. I guess that in languages which don't optimise recursions it is smart to avoid it for performance reasons where matters more than expressivity of the concept. Streaming the tokens from the tokeniser is a nice idea.