add helpers to retrieve URI encoded data (likely binary) from json objects

Author: guss77

daemon/json-helpers.c

@@ -46,6 +46,14 @@ str *json_object_get_str(JsonObject* json, const char *key) {
 	return out;
 }
 
+str *json_object_get_str_uri_enc(JsonObject *json, const char *key) {
+	str *strval = NULL;
+	strval = json_object_get_str(json, key);
+	if (!strval)
+		return NULL;
+	return str_uri_decode_len(strval->s, strval->len);
+}
+
 str *json_array_get_str(JsonArray *json, unsigned idx) {
 	const gchar *strval;
 	str *out = NULL;

include/json-helpers.h

@@ -23,6 +23,16 @@ str *json_reader_get_str(JsonReader *reader, const char *key);
  */
 str *json_object_get_str(JsonObject *json, const char *key);
 
+/**
+ * Retrieve a string value from a JSON object, using the JsonObject API, according to a key, decoding the
+ * URI encoded value. The resulting buffer might contain NULL values.
+ * @param json glib JsonObject from which to get the string
+ * @param key name of the string value to retrieve
+ * @return `str` string created from the string value, or `NULL` if no such value was found,
+ *   the reader is in an error state or not pointing to a JSON object. Release using `free()`.
+ */
+str *json_object_get_str_uri_enc(JsonObject *json, const char *key);
+
 /**
  * Retrieve a string value from a JSON list, using the JsonArray API, according to a key.
  * @param json glib JsonArray from which to get the string