Working clock stream. Propagate up write errors

example_clock.cc

@@ -1,5 +1,6 @@
 #include <gflags/gflags.h>
 #include <glog/logging.h>
+#include <sys/time.h>
 
 #include "sse.h"
 
@@ -10,6 +11,15 @@ int main(int argc, char *argv[]) {
 	gflags::ParseCommandLineFlags(&argc, &argv, true);
 
 	SSEServer server(FLAGS_port, [](std::unique_ptr<SSEStream> stream) {
+		while (true) {
+			timeval tv;
+			PCHECK(gettimeofday(&tv, nullptr) == 0);
+			uint64_t time_ms = tv.tv_sec * 1000 + tv.tv_usec / 1000;
+			if (!stream->WriteEvent(std::to_string(time_ms), 0, "time")) {
+				break;
+			}
+			sleep(1);
+		}
 	});
 	server.Serve();
 }