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Allow serving custom error page (#393)

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It might be useful for those self-hosting a Codeberg Pages instance to be able to serve a different error page than the one embedded with go:embed

Reviewed-on: https://codeberg.org/Codeberg/pages-server/pulls/393
Co-authored-by: Gnarwhal <git.aspect893@passmail.net>
Co-committed-by: Gnarwhal <git.aspect893@passmail.net>
This commit is contained in:
Gnarwhal 2024-11-17 16:28:52 +00:00 • committed by crapStone
parent bef866faae
commit 23a8e83e80
3 changed files with 33 additions and 6 deletions
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20
html/html.go
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@ -3,6 +3,8 @@ package html
import (
_ "embed"
"net/http"
"os"
"path"
"text/template" // do not use html/template here, we sanitize the message before passing it to the template
"codeberg.org/codeberg/pages/server/context"
@ -14,7 +16,7 @@ import (
var errorPage string
var (
errorTemplate = template.Must(template.New("error").Parse(errorPage))
errorTemplate = template.Must(template.New("error").Parse(loadCustomTemplateOrDefault()))
sanitizer = createBlueMondayPolicy()
)
@ -51,3 +53,19 @@ func createBlueMondayPolicy() *bluemonday.Policy {
return p
}
func loadCustomTemplateOrDefault() string {
contents, err := os.ReadFile("custom/error.html")
if err != nil {
if !os.IsNotExist(err) {
wd, wdErr := os.Getwd()
if wdErr != nil {
log.Err(err).Msg("could not load custom error page 'custom/error.html'")
} else {
log.Err(err).Msgf("could not load custom error page '%v'", path.Join(wd, "custom/error.html"))
}
}
return errorPage
}
return string(contents)
}