htmlquery
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Published
20 hours ago •
antchfx
antchfx
`replace()` on a query doesn't seem to work
package main
import (
"fmt"
"strings"
"github.com/antchfx/htmlquery"
)
func main() {
s := `<html><a href="https://github.com/cashapp/hermit-build/releases/download/go-tools/stringer-v0.1.12-darwin-amd64.bz2">foo</a></html>`
doc, err := htmlquery.Parse(strings.NewReader(s))
if err != nil {
panic(err)
}
nodes, err := htmlquery.QueryAll(doc, `replace((//a[contains(@href, '/stringer-')])/@href, '^.*/stringer-v([^-]*)-.*$', '$1')`)
if err != nil {
panic(err)
}
for _, node := range nodes {
fmt.Println(htmlquery.OutputHTML(node, false))
}
}
On playground: https://go.dev/play/p/jxU6UgH0DnK The same content+query works fine on https://www.freeformatter.com/xpath-tester.html
The above example without replace() works fine: https://go.dev/play/p/N22KULbkgRu
There are two problem.
-
replace()not supportd the regex syntax. -
replace()as a function and return a value with string type, you should callxpath.Evaluate(...), thehtmlquery.QueryAll()always return a set of node.
expr, err := xpath.Compile(`replace((//a[contains(@href, '/stringer-')])/@href, '^.*/stringer-v([^-]*)-.*$', '$1')`)
if err != nil {
panic(err)
}
v := expr.Evaluate(htmlquery.CreateXPathNavigator(doc))
fmt.Println(v.(string))
Thank you for the pointers, I've switched to using substring-after and substring-before. BTW it looks like replace should support regex?