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-rw-r--r--src/shared/web-util.c66
1 files changed, 66 insertions, 0 deletions
diff --git a/src/shared/web-util.c b/src/shared/web-util.c
new file mode 100644
index 0000000..39a300f
--- /dev/null
+++ b/src/shared/web-util.c
@@ -0,0 +1,66 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <stdbool.h>
+
+#include "string-util.h"
+#include "strv.h"
+#include "utf8.h"
+#include "web-util.h"
+
+bool http_etag_is_valid(const char *etag) {
+ if (isempty(etag))
+ return false;
+
+ if (!endswith(etag, "\""))
+ return false;
+
+ if (!STARTSWITH_SET(etag, "\"", "W/\""))
+ return false;
+
+ return true;
+}
+
+bool http_url_is_valid(const char *url) {
+ const char *p;
+
+ if (isempty(url))
+ return false;
+
+ p = STARTSWITH_SET(url, "http://", "https://");
+ if (!p)
+ return false;
+
+ if (isempty(p))
+ return false;
+
+ return ascii_is_valid(p);
+}
+
+bool file_url_is_valid(const char *url) {
+ const char *p;
+
+ if (isempty(url))
+ return false;
+
+ p = startswith(url, "file:/");
+ if (isempty(p))
+ return false;
+
+ return ascii_is_valid(p);
+}
+
+bool documentation_url_is_valid(const char *url) {
+ const char *p;
+
+ if (isempty(url))
+ return false;
+
+ if (http_url_is_valid(url) || file_url_is_valid(url))
+ return true;
+
+ p = STARTSWITH_SET(url, "info:", "man:");
+ if (isempty(p))
+ return false;
+
+ return ascii_is_valid(p);
+}