Allow to add Date header to the request.

webcc/utility.cc

@@ -1,12 +1,17 @@
 #include "webcc/utility.h"
 
+#include <ctime>
+#include <iomanip>  // for put_time
 #include <sstream>
 
 #include "boost/algorithm/string.hpp"
 #include "boost/uuid/random_generator.hpp"
 #include "boost/uuid/uuid_io.hpp"
 
+#include "webcc/version.h"
+
 namespace webcc {
+namespace utility {
 
 std::string RandomUuid() {
   boost::uuids::uuid u = boost::uuids::random_generator()();
@@ -15,6 +20,18 @@ std::string RandomUuid() {
   return ss.str();
 }
 
+const std::string& UserAgent() {
+  static auto s_user_agent = std::string("Webcc/") + WEBCC_VERSION;
+  return s_user_agent;
+}
+
+std::string GetTimestamp() {
+  std::time_t t = std::time(nullptr);
+  std::stringstream ss;
+  ss << std::put_time(std::gmtime(&t), "%a, %d %b %Y %H:%M:%S") << " GMT";
+  return ss.str();
+}
+
 bool SplitKV(const std::string& str, char delimiter,
              std::string* part1, std::string* part2) {
   std::size_t pos = str.find(delimiter);
@@ -31,4 +48,5 @@ bool SplitKV(const std::string& str, char delimiter,
   return true;
 }
 
+}  // namespace utility
 }  // namespace webcc