Add get function to tree, and implement basic tree in router

util.hpp

@@ -0,0 +1,27 @@
+#ifndef UTIL_H
+#define UTIL_H
+
+#include <string>
+#include <vector>
+
+inline std::vector<std::string> split(std::string s, std::string delimiter) {
+  size_t pos_start = 0, pos_end, delim_len = delimiter.length();
+  std::string token;
+  std::vector<std::string> res;
+
+  while ((pos_end = s.find(delimiter, pos_start)) != std::string::npos) {
+    token = s.substr(pos_start, pos_end - pos_start);
+    pos_start = pos_end + delim_len;
+    if (token != "") {
+      res.push_back(token);
+    }
+  }
+
+  token = s.substr(pos_start);
+  if (token != "") {
+    res.push_back(token);
+  }
+  return res;
+}
+
+#endif