log the connect error

CMakeLists.txt

@@ -56,13 +56,10 @@ set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_CXX_EXTENSIONS OFF)
 
 # Boost
-
 set(BOOST_COMPONENTS system date_time)
-
 if(NOT WEBCC_USE_STD_FILESYSTEM)
     set(BOOST_COMPONENTS ${BOOST_COMPONENTS} filesystem)
 endif()
-
 set(Boost_USE_STATIC_LIBS ON)
 set(Boost_USE_MULTITHREADED ON)
 find_package(Boost 1.66.0 REQUIRED COMPONENTS ${BOOST_COMPONENTS})
@@ -84,6 +81,14 @@ if(WEBCC_ENABLE_SSL)
     endif()
 endif()
 
+if(WEBCC_ENABLE_GZIP)
+    find_package(ZLIB REQUIRED)
+    if(ZLIB_FOUND)
+        # You can link to ${ZLIB_LIBRARIES} or the imported target ZLIB::ZLIB.
+        include_directories(${ZLIB_INCLUDE_DIRS})
+    endif()
+endif()
+
 include_directories(
     # For including its own headers as "webcc/client.h".
     ${PROJECT_SOURCE_DIR}
@@ -96,14 +101,6 @@ set(THIRD_PARTY_DIR ${PROJECT_SOURCE_DIR}/third_party)
 # For jsoncpp
 include_directories(${THIRD_PARTY_DIR}/src)
 
-if(WEBCC_ENABLE_GZIP)
-    find_package(ZLIB REQUIRED)
-    if(ZLIB_FOUND)
-        # You can link to ${ZLIB_LIBRARIES} or the imported target ZLIB::ZLIB.
-        include_directories(${ZLIB_INCLUDE_DIRS})
-    endif()
-endif()
-
 set_property(GLOBAL PROPERTY USE_FOLDERS ON)
 
 add_subdirectory(webcc)

webcc/client_base.cc

@@ -4,6 +4,7 @@
 
 #include "webcc/logger.h"
 #include "webcc/socket.h"
+#include "webcc/utility.h"
 
 using boost::asio::ip::tcp;
 using namespace std::placeholders;
@@ -112,15 +113,22 @@ void ClientBase::OnResolve(boost::system::error_code ec,
 
   LOG_VERB("Connect socket");
 
+  // Enable the following log only for debug purpose.
+#if 0
+  LOG_USER("Resolved endpoints:");
+  for (auto& endpoint : endpoints) {
+    LOG_USER("    - %s", utility::EndpointToString(endpoint).c_str());
+  }
+#endif
+
   AsyncWaitDeadlineTimer(connect_timeout_);
 
   socket_->AsyncConnect(request_->host(), endpoints,
                         std::bind(&ClientBase::OnConnect, this, _1, _2));
 }
 
-void ClientBase::OnConnect(boost::system::error_code ec, tcp::endpoint) {
+void ClientBase::OnConnect(boost::system::error_code ec,
-  LOG_VERB("On connect");
+                           tcp::endpoint endpoint) {
-
   StopDeadlineTimer();
 
   if (ec) {
@@ -128,7 +136,7 @@ void ClientBase::OnConnect(boost::system::error_code ec, tcp::endpoint) {
       // Socket has been closed by OnDeadlineTimer() or CloseSocket().
       LOG_WARN("Connect operation aborted");
     } else {
-      LOG_INFO("Connect error");
+      LOG_ERRO("Connect error (%s)", ec.message().c_str());
       // No need to close socket since no async operation is on it.
       //   socket_->Close();
     }

webcc/client_base.h

@@ -91,7 +91,8 @@ protected:
   void OnResolve(boost::system::error_code ec,
                  boost::asio::ip::tcp::resolver::results_type endpoints);
 
-  void OnConnect(boost::system::error_code ec, boost::asio::ip::tcp::endpoint);
+  void OnConnect(boost::system::error_code ec,
+                 boost::asio::ip::tcp::endpoint endpoint);
 
   void AsyncWrite();
   void OnWrite(boost::system::error_code ec, std::size_t length);