server : fix server_sent_event + enable verbose logs

Author: ggerganov

.github/workflows/server.yml

@@ -116,14 +116,14 @@ jobs:
         id: server_integration_tests
         run: |
           cd examples/server/tests
-          PORT=8888 ./tests.sh
+          LLAMA_LOG=10 PORT=8888 ./tests.sh
 
       - name: Slow tests
         id: server_integration_tests_slow
         if: ${{ (github.event.schedule || github.event.inputs.slow_tests == 'true') && matrix.build_type == 'Release' }}
         run: |
           cd examples/server/tests
-          PORT=8888 ./tests.sh --stop --no-skipped --no-capture --tags slow
+          LLAMA_LOG=10 PORT=8888 ./tests.sh --stop --no-skipped --no-capture --tags slow
 
 
   server-windows:

examples/server/tests/.gitignore

@@ -0,0 +1 @@
+.venv

examples/server/utils.hpp

@@ -295,9 +295,9 @@ static json probs_vector_to_json(const llama_context * ctx, const std::vector<co
 static bool server_sent_event(httplib::DataSink & sink, const char * event, const json & data) {
     const std::string str =
         std::string(event) + ": " +
-        data.dump(-1, ' ', false, json::error_handler_t::replace);
+        data.dump(-1, ' ', false, json::error_handler_t::replace) + "\n\n";
 
-    LOG_DBG("data stream, to_send: %s\n\n", str.c_str());
+    LOG_DBG("data stream, to_send: %s", str.c_str());
 
     return sink.write(str.c_str(), str.size());
 }