Fixed yhirose#35

Author: yhirose

example/server.cc

@@ -7,6 +7,7 @@
 
 #include <httplib.h>
 #include <cstdio>
+#include <chrono>
 
 #define SERVER_CERT_FILE "./cert.pem"
 #define SERVER_PRIVATE_KEY_FILE "./key.pem"
@@ -77,7 +78,13 @@ int main(void)
     });
 
     svr.get("/hi", [](const auto& /*req*/, auto& res) {
-        res.set_content("Hello World!", "text/plain");
+        res.set_content("Hello World!\n", "text/plain");
+    });
+
+    svr.get("/slow", [](const auto& /*req*/, auto& res) {
+        using namespace std::chrono_literals;
+        std::this_thread::sleep_for(2s);
+        res.set_content("Slow...\n", "text/plain");
     });
 
     svr.get("/dump", [](const auto& req, auto& res) {

httplib.h

@@ -55,6 +55,7 @@ typedef int socket_t;
 #include <memory>
 #include <regex>
 #include <string>
+#include <thread>
 #include <sys/stat.h>
 #include <assert.h>
 
@@ -1236,7 +1237,13 @@ inline bool Server::listen(const char* host, int port, int socket_flags)
         }
 
         // TODO: should be async
+#ifdef CPPHTTPLIB_NO_MULTI_THREAD_SUPPORT
         read_and_close_socket(sock);
+#else
+        std::thread([=]() {
+            read_and_close_socket(sock);
+        }).detach();
+#endif
     }
 
     return ret;