1 files changed, 39 insertions, 0 deletions
diff --git a/libs/surfaces/websockets/json.cc b/libs/surfaces/websockets/json.cc
new file mode 100644
index 0000000000..b46857721e
--- /dev/null
+++ b/libs/surfaces/websockets/json.cc
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2020 Luciano Iam <lucianito@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the/GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <iomanip>
+#include <sstream>
+
+#include "json.h"
+
+/* adapted from https://stackoverflow.com/questions/7724448/simple-json-string-escape-for-c
+   CC BY-SA 4.0 license */
+std::string
+Json::escape (const std::string &s) {
+    std::ostringstream o;
+
+    for (std::string::const_iterator it = s.begin(); it != s.end(); ++it) {
+        if (*it == '"' || *it == '\\' || ('\x00' <= *it && *it <= '\x1f')) {
+            o << "\\u" << std::hex << std::setw (4) << std::setfill ('0') << static_cast<int>(*it);
+        } else {
+            o << *it;
+        }
+    }
+    
+    return o.str ();
+}