nsurl: Add variant of nsurl_access for logging.

utils/nsurl.h

@@ -180,6 +180,24 @@ bool nsurl_has_component(const nsurl *url, nsurl_component part);
 const char *nsurl_access(const nsurl *url);
 
 
+/**
+ * Variant of \ref nsurl_access for logging.
+ *
+ * \param url	  NetSurf URL to retrieve a string pointer for.
+ * \return the required string
+ *
+ * This will not necessarily return the actual nsurl's URL, but something
+ * that is suitable for recording to logs.  E.g. URLs with the `data` scheme
+ * will return a simple place holder, to avoid repeatedly dumping loads of data.
+ *
+ * The returned string is owned by the NetSurf URL object.  It will die
+ * with the NetSurf URL object.  Keep a reference to the URL if you need it.
+ *
+ * The returned string has a trailing '\0'.
+ */
+const char *nsurl_access_log(const nsurl *url);
+
+
 /**
  * Get a UTF-8 string (for human readable IDNs) from a NetSurf URL object
  *

utils/nsurl/nsurl.c

@@ -315,6 +315,19 @@ const char *nsurl_access(const nsurl *url)
 }
 
 
+/* exported interface, documented in nsurl.h */
+const char *nsurl_access_log(const nsurl *url)
+{
+	assert(url != NULL);
+
+	if (url->components.scheme_type == NSURL_SCHEME_DATA) {
+		return "[data url]";
+	}
+
+	return url->string;
+}
+
+
 /* exported interface, documented in nsurl.h */
 nserror nsurl_get_utf8(const nsurl *url, char **url_s, size_t *url_l)
 {