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perf(rewrite): anchor the rewrite regex

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There is no need to try to match the regexp over the whole input, having it
anchored is enough. If we feel extra-lenient, we might strip spaces in
front/tail, but I don't think it's necessary.

This commit also invert a condition to reduce the level of nested indentation,
and make a condition stricter.
This commit is contained in:
jvoisin 2025-07-11 00:59:35 +02:00 • committed by Frédéric Guillot
parent 9dea26c923
commit f455c18c66
1 changed files with 28 additions and 26 deletions
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10
internal/reader/rewrite/url_rewrite.go
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@ -10,14 +10,17 @@ import (
"miniflux.app/v2/internal/model" "miniflux.app/v2/internal/model"
) )
var customReplaceRuleRegex = regexp.MustCompile(`rewrite\("([^"]+)"\|"([^"]+)"\)`) var customReplaceRuleRegex = regexp.MustCompile(`^rewrite\("([^"]+)"\|"([^"]+)"\)$`)
func RewriteEntryURL(feed *model.Feed, entry *model.Entry) string { func RewriteEntryURL(feed *model.Feed, entry *model.Entry) string {
if feed.UrlRewriteRules == "" {
return entry.URL
}
var rewrittenURL = entry.URL var rewrittenURL = entry.URL
if feed.UrlRewriteRules != "" {
parts := customReplaceRuleRegex.FindStringSubmatch(feed.UrlRewriteRules) parts := customReplaceRuleRegex.FindStringSubmatch(feed.UrlRewriteRules)
if len(parts) >= 3 { if len(parts) == 3 {
re, err := regexp.Compile(parts[1]) re, err := regexp.Compile(parts[1])
if err != nil { if err != nil {
slog.Error("Failed on regexp compilation", slog.Error("Failed on regexp compilation",
@ -42,7 +45,6 @@ func RewriteEntryURL(feed *model.Feed, entry *model.Entry) string {
slog.String("url_rewrite_rules", feed.UrlRewriteRules), slog.String("url_rewrite_rules", feed.UrlRewriteRules),
) )
} }
}
return rewrittenURL return rewrittenURL
} }