正则表达式以html（golang）查找图像

Question

I'm parsing an xml rss feed from a couple of different sources and I want to find the images in the html.

I did some research and I found a regex that I think might work

/<img[^>]+src="?([^"\s]+)"?\s*\/>/g

but I have trouble using it in go. It gives me errors because I don't know how to make it search with that expression.

I tried using it as a string, it doesn't escape properly with single or with double quotes. I tried using it just like that, bare, and it gives me an error.

Any ideas?

Answer 1

Using a proper html parser is always better for parsing html, however a cheap / hackish regex can also work fine, here's an example:

var imgRE = regexp.MustCompile(`<img[^>]+\bsrc=["']([^"']+)["']`)
// if your img's are properly formed with doublequotes then use this, it's more efficient.
// var imgRE = regexp.MustCompile(`<img[^>]+\bsrc="([^"]+)"`)
func findImages(htm string) []string {
    imgs := imgRE.FindAllStringSubmatch(htm, -1)
    out := make([]string, len(imgs))
    for i := range out {
        out[i] = imgs[i][1]
    }
    return out
}

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