snapshot of https://github.com/ory/keto.git (master, 2026-09-16; blobs > 131072B omitted)

oryx/pagination/keysetpagination_v2/parse_header.go

@@ -0,0 +1,35 @@
+// Copyright © 2023 Ory Corp
+// SPDX-License-Identifier: Apache-2.0
+
+package keysetpagination
+
+import (
+	"net/http"
+	"net/url"
+
+	"github.com/peterhellberg/link"
+)
+
+// ParseHeader parses the response header's Link and returns the first and next page tokens.
+func ParseHeader(r *http.Response) (first, next string, isLast bool) {
+	links := link.ParseResponse(r)
+	first, _ = findRel(links, "first")
+	next, hasNext := findRel(links, "next")
+	return first, next, !hasNext
+}
+
+func findRel(links link.Group, rel string) (string, bool) {
+	for idx, l := range links {
+		if idx == rel {
+			parsed, err := url.Parse(l.URI)
+			if err != nil {
+				continue
+			}
+			q := parsed.Query()
+
+			return q.Get("page_token"), q.Has("page_token")
+		}
+	}
+
+	return "", false
+}