Add async-client support; refine http message dump format.

CMakeLists.txt

@@ -4,8 +4,7 @@ project(webcc)
 option(WEBCC_ENABLE_LOG "Enable console logger?" ON)
 option(WEBCC_ENABLE_SOAP "Enable SOAP support (need pugixml)?" ON)
 option(WEBCC_BUILD_UNITTEST "Build unit test?" ON)
-option(WEBCC_BUILD_REST_EXAMPLE "Build REST example?" ON)
+option(WEBCC_BUILD_EXAMPLE "Build examples?" ON)
-option(WEBCC_BUILD_SOAP_EXAMPLE "Build SOAP example?" ON)
 
 if(WEBCC_ENABLE_LOG)
     add_definitions(-DWEBCC_ENABLE_LOG)
@@ -45,7 +44,12 @@ if(WIN32)
 	message(STATUS "_WIN32_WINNT=${ver}")
     # Asio needs this!
 	add_definitions(-D_WIN32_WINNT=${ver})
-endif(WIN32)
+endif()
+
+if(WIN32)
+	# Disable warning on boost string algorithms.
+	add_definitions(-D_SCL_SECURE_NO_WARNINGS)
+endif()
 
 # Group sources by dir.
 # Usage: source_group_by_dir(SRCS)
@@ -104,18 +108,22 @@ endif()
 
 add_subdirectory(src/webcc)
 
-if(WEBCC_BUILD_REST_EXAMPLE)
+if(WEBCC_BUILD_EXAMPLE)
+	add_subdirectory(${PROJECT_SOURCE_DIR}/example/http/client)
+	add_subdirectory(${PROJECT_SOURCE_DIR}/example/http/async_client)
+
 	# REST example needs jsoncpp to parse and create JSON.
 	add_subdirectory(${PROJECT_SOURCE_DIR}/third_party/jsoncpp)
 	include_directories(${PROJECT_SOURCE_DIR}/third_party/jsoncpp)
 
-	add_subdirectory(${PROJECT_SOURCE_DIR}/example/rest_book_server)
+	add_subdirectory(${PROJECT_SOURCE_DIR}/example/rest/book_server)
-	add_subdirectory(${PROJECT_SOURCE_DIR}/example/rest_book_client)
+	add_subdirectory(${PROJECT_SOURCE_DIR}/example/rest/book_client)
-endif()
+	add_subdirectory(${PROJECT_SOURCE_DIR}/example/rest/book_async_client)
 
-if(WEBCC_BUILD_SOAP_EXAMPLE)
+	if(WEBCC_ENABLE_SOAP)
-	add_subdirectory(${PROJECT_SOURCE_DIR}/example/soap_calc_server)
+		add_subdirectory(${PROJECT_SOURCE_DIR}/example/soap/calc_server)
-	add_subdirectory(${PROJECT_SOURCE_DIR}/example/soap_calc_client)
+		add_subdirectory(${PROJECT_SOURCE_DIR}/example/soap/calc_client)
+	endif()
 endif()
 
 if(WEBCC_BUILD_UNITTEST)

example/http/async_client/CMakeLists.txt

@@ -0,0 +1,4 @@
+add_executable(http_async_client main.cc)
+
+target_link_libraries(http_async_client webcc ${Boost_LIBRARIES})
+target_link_libraries(http_async_client "${CMAKE_THREAD_LIBS_INIT}")

example/http/async_client/main.cc

@@ -0,0 +1,49 @@
+#include <iostream>
+
+#include "boost/asio/io_context.hpp"
+
+#include "webcc/logger.h"
+#include "webcc/http_async_client.h"
+
+// In order to test this client, create a file index.html whose content is
+// simply "Hello, World!", then start a HTTP server with Python 3:
+//     $ python -m http.server
+// The default port number should be 8000.
+
+void Test(boost::asio::io_context& ioc) {
+  std::shared_ptr<webcc::HttpRequest> request(new webcc::HttpRequest());
+
+  request->set_method(webcc::kHttpGet);
+  request->set_url("/index.html");
+  request->SetHost("localhost", "8000");
+
+  request->Build();
+
+  webcc::HttpAsyncClientPtr client(new webcc::HttpAsyncClient(ioc));
+
+  // Response handler.
+  auto handler = [](std::shared_ptr<webcc::HttpResponse> response,
+                    webcc::Error error) {
+    if (error == webcc::kNoError) {
+      std::cout << response->content() << std::endl;
+    } else {
+      std::cout << webcc::DescribeError(error) << std::endl;
+    }
+  };
+
+  client->Request(request, handler);
+}
+
+int main() {
+  LOG_INIT(webcc::ERRO, 0);
+
+  boost::asio::io_context ioc;
+
+  Test(ioc);
+  Test(ioc);
+  Test(ioc);
+
+  ioc.run();
+
+  return 0;
+}

example/http/client/CMakeLists.txt

@@ -0,0 +1,4 @@
+add_executable(http_client main.cc)
+
+target_link_libraries(http_client webcc ${Boost_LIBRARIES})
+target_link_libraries(http_client "${CMAKE_THREAD_LIBS_INIT}")

example/http/client/main.cc

@@ -0,0 +1,38 @@
+#include <iostream>
+
+#include "webcc/logger.h"
+#include "webcc/http_client.h"
+
+// In order to test this client, create a file index.html whose content is
+// simply "Hello, World!", then start a HTTP server with Python 3:
+//     $ python -m http.server
+// The default port number should be 8000.
+
+void Test() {
+  webcc::HttpRequest request;
+
+  request.set_method(webcc::kHttpGet);
+  request.set_url("/index.html");
+  request.SetHost("localhost", "8000");
+
+  request.Build();
+
+  webcc::HttpResponse response;
+
+  webcc::HttpClient client;
+  if (!client.Request(request)) {
+    return;
+  }
+
+  std::cout << response.content() << std::endl;
+}
+
+int main() {
+  LOG_INIT(webcc::ERRO, 0);
+
+  Test();
+  Test();
+  Test();
+
+  return 0;
+}

example/rest/book_async_client/CMakeLists.txt

@@ -0,0 +1,4 @@
+add_executable(rest_book_async_client main.cc)
+
+target_link_libraries(rest_book_async_client webcc jsoncpp ${Boost_LIBRARIES})
+target_link_libraries(rest_book_async_client "${CMAKE_THREAD_LIBS_INIT}")

example/rest/book_async_client/main.cc

@@ -0,0 +1,137 @@
+#include <iostream>
+
+#include "json/json.h"
+
+#include "webcc/logger.h"
+#include "webcc/rest_async_client.h"
+
+// -----------------------------------------------------------------------------
+
+// Write a JSON object to string.
+std::string JsonToString(const Json::Value& json) {
+  Json::StreamWriterBuilder builder;
+  return Json::writeString(builder, json);
+}
+
+// -----------------------------------------------------------------------------
+
+class BookListClient {
+ public:
+  BookListClient(boost::asio::io_context& io_context,
+                 const std::string& host, const std::string& port)
+      : client_(io_context, host, port) {
+  }
+
+  void ListBooks(webcc::HttpResponseHandler handler) {
+    std::cout << "ListBooks" << std::endl;
+
+    client_.Get("/books", handler);
+  }
+
+  void CreateBook(const std::string& id,
+                  const std::string& title,
+                  double price,
+                  webcc::HttpResponseHandler handler) {
+    std::cout << "CreateBook: " << id << " " << title << " " << price
+              << std::endl;
+
+    Json::Value json(Json::objectValue);
+    json["id"] = id;
+    json["title"] = title;
+    json["price"] = price;
+
+    client_.Post("/books", JsonToString(json), handler);
+  }
+
+ private:
+  webcc::RestAsyncClient client_;
+};
+
+// -----------------------------------------------------------------------------
+
+class BookDetailClient {
+public:
+  BookDetailClient(boost::asio::io_context& io_context,
+                   const std::string& host, const std::string& port)
+      : rest_client_(io_context, host, port) {
+  }
+
+  void GetBook(const std::string& id, webcc::HttpResponseHandler handler) {
+    std::cout << "GetBook: " << id << std::endl;
+
+    rest_client_.Get("/book/" + id, handler);
+  }
+
+  void UpdateBook(const std::string& id,
+                  const std::string& title,
+                  double price,
+                  webcc::HttpResponseHandler handler) {
+    std::cout << "UpdateBook: " << id << " " << title << " " << price
+              << std::endl;
+
+    // NOTE: ID is already in the URL.
+    Json::Value json(Json::objectValue);
+    json["title"] = title;
+    json["price"] = price;
+
+    rest_client_.Put("/book/" + id, JsonToString(json), handler);
+  }
+
+  void DeleteBook(const std::string& id, webcc::HttpResponseHandler handler) {
+    std::cout << "DeleteBook: " << id << std::endl;
+
+    rest_client_.Delete("/book/" + id, handler);
+  }
+
+private:
+  webcc::RestAsyncClient rest_client_;
+};
+
+// -----------------------------------------------------------------------------
+
+void Help(const char* argv0) {
+  std::cout << "Usage: " << argv0 << " <host> <port>" << std::endl;
+  std::cout << "  E.g.," << std::endl;
+  std::cout << "    " << argv0 << " localhost 8080" << std::endl;
+}
+
+int main(int argc, char* argv[]) {
+  if (argc != 3) {
+    Help(argv[0]);
+    return 1;
+  }
+
+  LOG_INIT(webcc::ERRO, 0);
+
+  std::string host = argv[1];
+  std::string port = argv[2];
+
+  boost::asio::io_context io_context;
+
+  BookListClient list_client(io_context, host, port);
+  BookDetailClient detail_client(io_context, host, port);
+
+  // Response handler.
+  auto handler = [](std::shared_ptr<webcc::HttpResponse> response,
+                    webcc::Error error) {
+    if (error == webcc::kNoError) {
+      std::cout << response->content() << std::endl;
+    } else {
+      std::cout << webcc::DescribeError(error) << std::endl;
+    }
+  };
+
+  list_client.ListBooks(handler);
+  list_client.CreateBook("1", "1984", 12.3, handler);
+
+  detail_client.GetBook("1", handler);
+  detail_client.UpdateBook("1", "1Q84", 32.1, handler);
+  detail_client.GetBook("1", handler);
+  detail_client.DeleteBook("1", handler);
+
+  list_client.ListBooks(handler);
+
+  io_context.run();
+
+  return 0;
+}

example/rest/book_client/main.cc

@@ -1,12 +1,8 @@
 #include <iostream>
 
-#include "boost/algorithm/string.hpp"
 #include "json/json.h"
 
 #include "webcc/logger.h"
-#include "webcc/http_client.h"
-#include "webcc/http_request.h"
-#include "webcc/http_response.h"
 #include "webcc/rest_client.h"
 
 // -----------------------------------------------------------------------------
@@ -21,26 +17,28 @@ std::string JsonToString(const Json::Value& json) {
 
 class BookListClient {
 public:
-  BookListClient(const std::string& host, const std::string& port)
+  BookListClient(const std::string& host, const std::string& port,
-      : rest_client_(host, port) {
+                 int timeout_seconds)
+      : client_(host, port) {
+    client_.set_timeout_seconds(timeout_seconds);
   }
 
   bool ListBooks() {
     std::cout << "ListBooks" << std::endl;
 
-    webcc::HttpResponse http_response;
+    if (!client_.Get("/books")) {
-    if (!rest_client_.Get("/books", &http_response)) {
+      std::cout << webcc::DescribeError(client_.error()) << std::endl;
       return false;
     }
 
-    std::cout << http_response.content() << std::endl;
+    std::cout << client_.response_content() << std::endl;
     return true;
   }
 
   bool CreateBook(const std::string& id,
                   const std::string& title,
                   double price) {
-    std::cout << "CreateBook: " << id << " " << title << " " << price
+    std::cout << "CreateBook: " << id << ", " << title << ", " << price
               << std::endl;
 
     Json::Value json(Json::objectValue);
@@ -48,44 +46,46 @@ public:
     json["title"] = title;
     json["price"] = price;
 
-    webcc::HttpResponse http_response;
+    if (!client_.Post("/books", JsonToString(json))) {
-    if (!rest_client_.Post("/books", JsonToString(json), &http_response)) {
+      std::cout << webcc::DescribeError(client_.error()) << std::endl;
       return false;
     }
 
-    std::cout << http_response.status() << std::endl;
+    std::cout << client_.response_status() << std::endl;
 
     return true;
   }
 
 private:
-  webcc::RestClient rest_client_;
+  webcc::RestClient client_;
 };
 
 // -----------------------------------------------------------------------------
 
 class BookDetailClient {
 public:
-  BookDetailClient(const std::string& host, const std::string& port)
+  BookDetailClient(const std::string& host, const std::string& port,
+                   int timeout_seconds)
       : rest_client_(host, port) {
+    rest_client_.set_timeout_seconds(timeout_seconds);
   }
 
   bool GetBook(const std::string& id) {
     std::cout << "GetBook: " << id << std::endl;
 
-    webcc::HttpResponse http_response;
+    if (!rest_client_.Get("/book/" + id)) {
-    if (!rest_client_.Get("/book/" + id, &http_response)) {
+      std::cout << webcc::DescribeError(rest_client_.error()) << std::endl;
       return false;
     }
 
-    std::cout << http_response.content() << std::endl;
+    std::cout << rest_client_.response_content() << std::endl;
     return true;
   }
 
   bool UpdateBook(const std::string& id,
                   const std::string& title,
                   double price) {
-    std::cout << "UpdateBook: " << id << " " << title << " " << price
+    std::cout << "UpdateBook: " << id << ", " << title << ", " << price
               << std::endl;
 
     // NOTE: ID is already in the URL.
@@ -93,24 +93,24 @@ public:
     json["title"] = title;
     json["price"] = price;
 
-    webcc::HttpResponse http_response;
+    if (!rest_client_.Put("/book/" + id, JsonToString(json))) {
-    if (!rest_client_.Put("/book/" + id, JsonToString(json), &http_response)) {
+      std::cout << webcc::DescribeError(rest_client_.error()) << std::endl;
       return false;
     }
 
-    std::cout << http_response.status() << std::endl;
+    std::cout << rest_client_.response_status() << std::endl;
     return true;
   }
 
   bool DeleteBook(const std::string& id) {
     std::cout << "DeleteBook: " << id << std::endl;
 
-    webcc::HttpResponse http_response;
+    if (!rest_client_.Delete("/book/" + id)) {
-    if (!rest_client_.Delete("/book/" + id, &http_response)) {
+      std::cout << webcc::DescribeError(rest_client_.error()) << std::endl;
       return false;
     }
 
-    std::cout << http_response.status() << std::endl;
+    std::cout << rest_client_.response_status() << std::endl;
     return true;
   }
 
@@ -121,24 +121,30 @@ private:
 // -----------------------------------------------------------------------------
 
 void Help(const char* argv0) {
-  std::cout << "Usage: " << argv0 << " <host> <port>" << std::endl;
+  std::cout << "Usage: " << argv0 << " <host> <port> [timeout]" << std::endl;
   std::cout << "  E.g.," << std::endl;
   std::cout << "    " << argv0 << " localhost 8080" << std::endl;
+  std::cout << "    " << argv0 << " localhost 8080 2" << std::endl;
 }
 
 int main(int argc, char* argv[]) {
-  if (argc != 3) {
+  if (argc < 3) {
     Help(argv[0]);
     return 1;
   }
 
-  LOG_INIT(webcc::ERRO, 0);
+  LOG_INIT(webcc::VERB, 0);
 
   std::string host = argv[1];
   std::string port = argv[2];
 
-  BookListClient list_client(host, port);
+  int timeout_seconds = -1;
-  BookDetailClient detail_client(host, port);
+  if (argc > 3) {
+    timeout_seconds = std::atoi(argv[3]);
+  }
+
+  BookListClient list_client(host, port, timeout_seconds);
+  BookDetailClient detail_client(host, port, timeout_seconds);
 
   list_client.ListBooks();
   list_client.CreateBook("1", "1984", 12.3);

example/rest/book_server/book_services.cc

@@ -4,7 +4,9 @@
 #include <iostream>
 
 #include "boost/lexical_cast.hpp"
+#include "boost/thread/thread.hpp"
 #include "json/json.h"
+#include "webcc/logger.h"
 
 // -----------------------------------------------------------------------------
 
@@ -121,6 +123,11 @@ static bool BookFromJson(const std::string& json, Book* book) {
 // TODO: Support query parameters.
 bool BookListService::Get(const webcc::UrlQuery& /* query */,
                           std::string* response_content) {
+  if (sleep_seconds_ > 0) {
+    LOG_INFO("Sleep %d seconds...", sleep_seconds_);
+    boost::this_thread::sleep_for(boost::chrono::seconds(sleep_seconds_));
+  }
+
   Json::Value root(Json::arrayValue);
   for (const Book& book : g_book_store.books()) {
     root.append(book.ToJson());
@@ -136,10 +143,16 @@ bool BookListService::Get(const webcc::UrlQuery& /* query */,
 // No response content.
 bool BookListService::Post(const std::string& request_content,
                            std::string* /* response_content */) {
+  if (sleep_seconds_ > 0) {
+    LOG_INFO("Sleep %d seconds...", sleep_seconds_);
+    boost::this_thread::sleep_for(boost::chrono::seconds(sleep_seconds_));
+  }
+
   Book book;
   if (BookFromJson(request_content, &book)) {
     return g_book_store.AddBook(book);
   }
+
   return false;
 }
 
@@ -148,6 +161,11 @@ bool BookListService::Post(const std::string& request_content,
 bool BookDetailService::Get(const std::vector<std::string>& url_sub_matches,
                             const webcc::UrlQuery& query,
                             std::string* response_content) {
+  if (sleep_seconds_ > 0) {
+    LOG_INFO("Sleep %d seconds...", sleep_seconds_);
+    boost::this_thread::sleep_for(boost::chrono::seconds(sleep_seconds_));
+  }
+
   if (url_sub_matches.size() != 1) {
     return false;
   }
@@ -168,6 +186,11 @@ bool BookDetailService::Get(const std::vector<std::string>& url_sub_matches,
 bool BookDetailService::Put(const std::vector<std::string>& url_sub_matches,
                             const std::string& request_content,
                             std::string* response_content) {
+  if (sleep_seconds_ > 0) {
+    LOG_INFO("Sleep %d seconds...", sleep_seconds_);
+    boost::this_thread::sleep_for(boost::chrono::seconds(sleep_seconds_));
+  }
+
   if (url_sub_matches.size() != 1) {
     return false;
   }
@@ -185,6 +208,11 @@ bool BookDetailService::Put(const std::vector<std::string>& url_sub_matches,
 
 bool BookDetailService::Delete(
     const std::vector<std::string>& url_sub_matches) {
+  if (sleep_seconds_ > 0) {
+    LOG_INFO("Sleep %d seconds...", sleep_seconds_);
+    boost::this_thread::sleep_for(boost::chrono::seconds(sleep_seconds_));
+  }
+
   if (url_sub_matches.size() != 1) {
     return false;
   }

example/rest/book_server/book_services.h

@@ -12,17 +12,25 @@
 //   - /books?name={BookName}
 // The query parameters could be regular expressions.
 class BookListService : public webcc::RestListService {
+ public:
+  BookListService(int sleep_seconds) : sleep_seconds_(sleep_seconds) {
+  }
+
  protected:
   // Return a list of books based on query parameters.
   // URL examples:
   //   - /books
   //   - /books?name={BookName}
   bool Get(const webcc::UrlQuery& query,
-           std::string* response_content) final;
+           std::string* response_content) override;
 
   // Create a new book.
   bool Post(const std::string& request_content,
-            std::string* response_content) final;
+            std::string* response_content) override;
+
+ private:
+   // Sleep for the client to test timeout control.
+   int sleep_seconds_ = 0;
 };
 
 // -----------------------------------------------------------------------------
@@ -30,16 +38,24 @@ class BookListService : public webcc::RestListService {
 // The URL is like '/books/{BookID}', and the 'url_sub_matches' parameter
 // contains the matched book ID.
 class BookDetailService : public webcc::RestDetailService {
+ public:
+  BookDetailService(int sleep_seconds) : sleep_seconds_(sleep_seconds) {
+  }
+
  protected:
   bool Get(const std::vector<std::string>& url_sub_matches,
            const webcc::UrlQuery& query,
-           std::string* response_content) final;
+           std::string* response_content) override;
 
   bool Put(const std::vector<std::string>& url_sub_matches,
            const std::string& request_content,
-           std::string* response_content) final;
+           std::string* response_content) override;
 
-  bool Delete(const std::vector<std::string>& url_sub_matches) final;
+  bool Delete(const std::vector<std::string>& url_sub_matches) override;
+
+ private:
+  // Sleep for the client to test timeout control.
+  int sleep_seconds_ = 0;
 };
 
 #endif  // BOOK_SERVICE_H_

example/rest/book_server/main.cc

@@ -0,0 +1,52 @@
+#include <iostream>
+
+#include "webcc/logger.h"
+#include "webcc/rest_server.h"
+
+#include "book_services.h"
+
+void Help(const char* argv0) {
+  std::cout << "Usage: " << argv0 << " <port> [seconds]" << std::endl;
+  std::cout << "If |seconds| is provided, the server will sleep these seconds "
+               "before sending back each response."
+            << std::endl;
+  std::cout << "  E.g.," << std::endl;
+  std::cout << "    " << argv0 << " 8080" << std::endl;
+  std::cout << "    " << argv0 << " 8080 3" << std::endl;
+}
+
+int main(int argc, char* argv[]) {
+  if (argc < 2) {
+    Help(argv[0]);
+    return 1;
+  }
+
+  LOG_INIT(webcc::VERB, 0);
+
+  unsigned short port = std::atoi(argv[1]);
+
+  int sleep_seconds = 0;
+  if (argc >= 3) {
+    sleep_seconds = std::atoi(argv[2]);
+  }
+
+  std::size_t workers = 2;
+
+  try {
+    webcc::RestServer server(port, workers);
+
+    server.Bind(std::make_shared<BookListService>(sleep_seconds),
+                "/books", false);
+
+    server.Bind(std::make_shared<BookDetailService>(sleep_seconds),
+                "/book/(\\d+)", true);
+
+    server.Run();
+
+  } catch (std::exception& e) {
+    std::cerr << "Exception: " << e.what() << std::endl;
+    return 1;
+  }
+
+  return 0;
+}

example/rest_book_server/main.cc

@@ -1,41 +0,0 @@
-#include <iostream>
-
-#include "webcc/logger.h"
-#include "webcc/rest_server.h"
-
-#include "book_services.h"
-
-static void Help(const char* argv0) {
-  std::cout << "Usage: " << argv0 << " <port>" << std::endl;
-  std::cout << "  E.g.," << std::endl;
-  std::cout << "    " << argv0 << " 8080" << std::endl;
-}
-
-int main(int argc, char* argv[]) {
-  if (argc != 2) {
-    Help(argv[0]);
-    return 1;
-  }
-
-  LOG_INIT(webcc::VERB, 0);
-
-  unsigned short port = std::atoi(argv[1]);
-
-  std::size_t workers = 2;
-
-  try {
-    webcc::RestServer server(port, workers);
-
-    server.Bind(std::make_shared<BookListService>(), "/books", false);
-
-    server.Bind(std::make_shared<BookDetailService>(), "/book/(\\d+)", true);
-
-    server.Run();
-
-  } catch (std::exception& e) {
-    std::cerr << "Exception: " << e.what() << std::endl;
-    return 1;
-  }
-
-  return 0;
-}

example/soap/calc_client/CMakeLists.txt

@@ -1,7 +1,3 @@
-set(CMAKE_CXX_STANDARD 11)
-set(CMAKE_CXX_STANDARD_REQUIRED ON)
-set(CMAKE_CXX_EXTENSIONS OFF)
-
 file(GLOB SRCS *.cc *.h)
 
 add_executable(soap_calc_client ${SRCS})

example/soap/calc_client/calc_client.cc

@@ -74,7 +74,7 @@ bool CalcClient::Calc(const std::string& operation,
   if (error != webcc::kNoError) {
     LOG_ERRO("Operation '%s' failed: %s",
              operation.c_str(),
-             webcc::GetErrorMessage(error));
+             webcc::DescribeError(error));
     return false;
   }
 

example/soap/calc_server/CMakeLists.txt

@@ -1,7 +1,3 @@
-set(CMAKE_CXX_STANDARD 11)
-set(CMAKE_CXX_STANDARD_REQUIRED ON)
-set(CMAKE_CXX_EXTENSIONS OFF)
-
 file(GLOB SRCS *.cc *.h)
 
 add_executable(soap_calc_server ${SRCS})

example/soap/calc_server/main.cc

@@ -1,6 +1,8 @@
 #include <iostream>
+
 #include "webcc/logger.h"
 #include "webcc/soap_server.h"
+
 #include "calc_service.h"
 
 static void Help(const char* argv0) {

src/webcc/CMakeLists.txt

@@ -4,6 +4,8 @@ add_definitions(-DBOOST_ASIO_NO_DEPRECATED)
 set(SRCS
 	globals.cc
 	globals.h
+	http_async_client.cc
+	http_async_client.h
 	http_client.cc
 	http_client.h
 	http_message.cc
@@ -27,6 +29,8 @@ set(SRCS
 	logger.cc
 	logger.h
 	queue.h
+	rest_async_client.cc
+	rest_async_client.h
 	rest_client.cc
 	rest_client.h
 	rest_request_handler.cc

src/webcc/globals.cc

@@ -31,7 +31,7 @@ const std::string kHttpDelete = "DELETE";
 
 // -----------------------------------------------------------------------------
 
-const char* GetErrorMessage(Error error) {
+const char* DescribeError(Error error) {
   switch (error) {
     case kHostResolveError:
       return "Cannot resolve the host.";

src/webcc/globals.h

@@ -4,38 +4,15 @@
 #include <string>
 #include <vector>
 
-namespace webcc {
-
 // -----------------------------------------------------------------------------
 // Macros
 
-// Explicitly declare the assignment operator as deleted.
-#define DISALLOW_ASSIGN(TypeName) TypeName& operator=(const TypeName&) = delete;
-
 // Explicitly declare the copy constructor and assignment operator as deleted.
-#define DISALLOW_COPY_AND_ASSIGN(TypeName) \
+#define DELETE_COPY_AND_ASSIGN(TypeName) \
   TypeName(const TypeName&) = delete; \
-  DISALLOW_ASSIGN(TypeName)
+  TypeName& operator=(const TypeName&) = delete;
 
-// Explicitly declare all implicit constructors as deleted, namely the
+namespace webcc {
-// default constructor, copy constructor and operator= functions.
-// This is especially useful for classes containing only static methods.
-#define DISALLOW_IMPLICIT_CONSTRUCTORS(TypeName) \
-  TypeName() = delete;                           \
-  DISALLOW_COPY_AND_ASSIGN(TypeName)
-
-// Disallow copying a type, but provide default construction, move construction
-// and move assignment. Especially useful for move-only structs.
-#define MOVE_ONLY_WITH_DEFAULT_CONSTRUCTORS(TypeName) \
-  TypeName() = default;                               \
-  MOVE_ONLY_NO_DEFAULT_CONSTRUCTOR(TypeName)
-
-// Disallow copying a type, and only provide move construction and move
-// assignment. Especially useful for move-only structs.
-#define MOVE_ONLY_NO_DEFAULT_CONSTRUCTOR(TypeName) \
-  TypeName(TypeName&&) = default;                  \
-  TypeName& operator=(TypeName&&) = default;       \
-  DISALLOW_COPY_AND_ASSIGN(TypeName)
 
 // -----------------------------------------------------------------------------
 // Constants
@@ -46,6 +23,11 @@ const std::size_t kBufferSize = 1024;
 
 const std::size_t kInvalidLength = static_cast<std::size_t>(-1);
 
+// Timeout seconds.
+const int kMaxConnectSeconds = 10;
+const int kMaxSendSeconds = 10;
+const int kMaxReceiveSeconds = 30;
+
 extern const std::string kContentType;
 extern const std::string kContentLength;
 extern const std::string kSoapAction;
@@ -107,7 +89,7 @@ enum Error {
 };
 
 // Return a descriptive message for the given error code.
-const char* GetErrorMessage(Error error);
+const char* DescribeError(Error error);
 
 // -----------------------------------------------------------------------------
 

src/webcc/http_async_client.cc

@@ -1,41 +1,42 @@
 #include "webcc/http_async_client.h"
 
-#if 0
-#include "boost/asio.hpp"
-#else
 #include "boost/asio/connect.hpp"
 #include "boost/asio/read.hpp"
 #include "boost/asio/write.hpp"
-#endif
 
-#include "webcc/http_response_parser.h"
+#include "webcc/logger.h"
-#include "webcc/http_request.h"
-#include "webcc/http_response.h"
-
-using boost::asio::ip::tcp;
 
 namespace webcc {
 
 HttpAsyncClient::HttpAsyncClient(boost::asio::io_context& io_context)
-    : socket_(io_context) {
+    : socket_(io_context),
-
+      timeout_seconds_(kMaxReceiveSeconds),
+      deadline_timer_(io_context) {
   resolver_.reset(new tcp::resolver(io_context));
-
   response_.reset(new HttpResponse());
-  parser_.reset(new HttpResponseParser(response_.get()));
+  response_parser_.reset(new HttpResponseParser(response_.get()));
+
+  deadline_timer_.expires_at(boost::posix_time::pos_infin);
+
+  // Start the persistent actor that checks for deadline expiry.
+  CheckDeadline();
 }
 
-Error HttpAsyncClient::SendRequest(std::shared_ptr<HttpRequest> request,
+Error HttpAsyncClient::Request(std::shared_ptr<HttpRequest> request,
                                HttpResponseHandler response_handler) {
+  assert(request);
+  assert(response_handler);
+
   request_ = request;
+  response_handler_ = response_handler;
 
   std::string port = request->port();
   if (port.empty()) {
     port = "80";
   }
 
-  auto handler = std::bind(&HttpAsyncClient::HandleResolve,
+  auto handler = std::bind(&HttpAsyncClient::ResolveHandler,
-                           this,
+                           shared_from_this(),
                            std::placeholders::_1,
                            std::placeholders::_2);
 
@@ -44,110 +45,113 @@ Error HttpAsyncClient::SendRequest(std::shared_ptr<HttpRequest> request,
   return kNoError;
 }
 
-void HttpAsyncClient::HandleResolve(boost::system::error_code ec,
+void HttpAsyncClient::ResolveHandler(boost::system::error_code ec,
                                      tcp::resolver::results_type results) {
   if (ec) {
-    std::cerr << "Resolve: " << ec.message() << std::endl;
+    LOG_ERRO("Can't resolve host (%s): %s, %s", ec.message().c_str(),
-    //  return kHostResolveError;
+             request_->host().c_str(), request_->port().c_str());
+    response_handler_(response_, kHostResolveError);
   } else {
     endpoints_ = results;
-    DoConnect(endpoints_.begin());
+    AsyncConnect(endpoints_.begin());
   }
 }
 
-void HttpAsyncClient::DoConnect(tcp::resolver::results_type::iterator endpoint_it) {
+void HttpAsyncClient::AsyncConnect(tcp::resolver::results_type::iterator endpoint_it) {
   if (endpoint_it != endpoints_.end()) {
+    deadline_timer_.expires_from_now(
+        boost::posix_time::seconds(kMaxConnectSeconds));
+
     socket_.async_connect(endpoint_it->endpoint(),
-                          std::bind(&HttpAsyncClient::HandleConnect,
+                          std::bind(&HttpAsyncClient::ConnectHandler,
-                          this,
+                                    shared_from_this(),
                                     std::placeholders::_1,
                                     endpoint_it));
   }
 }
 
-void HttpAsyncClient::HandleConnect(boost::system::error_code ec,
+void HttpAsyncClient::ConnectHandler(
+    boost::system::error_code ec,
     tcp::resolver::results_type::iterator endpoint_it) {
   if (ec) {
-    // Will be here if the end point is v6.
+    // Will be here if the endpoint is IPv6.
-    std::cout << "Connect error: " << ec.message() << std::endl;
+    response_handler_(response_, kEndpointConnectError);
-    //  return kEndpointConnectError;
-
     socket_.close();
-
     // Try the next available endpoint.
-    DoConnect(++endpoint_it);
+    AsyncConnect(++endpoint_it);
   } else {
-    DoWrite();
+    AsyncWrite();
   }
 }
 
-// Send HTTP request.
+void HttpAsyncClient::AsyncWrite() {
-void HttpAsyncClient::DoWrite() {
+  deadline_timer_.expires_from_now(boost::posix_time::seconds(kMaxSendSeconds));
+
   boost::asio::async_write(socket_,
                            request_->ToBuffers(),
-                           std::bind(&HttpAsyncClient::HandleWrite,
+                           std::bind(&HttpAsyncClient::WriteHandler,
-                           this,
+                                     shared_from_this(),
                                      std::placeholders::_1));
 }
 
-void HttpAsyncClient::HandleWrite(boost::system::error_code ec) {
+void HttpAsyncClient::WriteHandler(boost::system::error_code ec) {
   if (ec) {
-    //return kSocketWriteError;
+    response_handler_(response_, kSocketWriteError);
-    return;
+  } else {
+    AsyncRead();
+  }
 }
 
-  DoRead();
+void HttpAsyncClient::AsyncRead() {
-}
+  deadline_timer_.expires_from_now(
+      boost::posix_time::seconds(timeout_seconds_));
 
-void HttpAsyncClient::DoRead() {
   socket_.async_read_some(boost::asio::buffer(buffer_),
-                          std::bind(&HttpAsyncClient::HandleRead,
+                          std::bind(&HttpAsyncClient::ReadHandler,
-                          this,
+                                    shared_from_this(),
                                     std::placeholders::_1,
                                     std::placeholders::_2));
 }
 
-void HttpAsyncClient::HandleRead(boost::system::error_code ec,
+void HttpAsyncClient::ReadHandler(boost::system::error_code ec,
                                   std::size_t length) {
   if (ec || length == 0) {
-    //return kSocketReadError;
+    response_handler_(response_, kSocketReadError);
     return;
   }
 
   // Parse the response piece just read.
-  // If the content has been fully received, next time flag "finished_"
+  // If the content has been fully received, |finished()| will be true.
-  // will be set.
+  Error error = response_parser_->Parse(buffer_.data(), length);
-  Error error = parser_->Parse(buffer_.data(), length);
 
   if (error != kNoError) {
-    //return error;
+    response_handler_(response_, error);
-  }
-
-  if (parser_->finished()) {
     return;
   }
 
-  // Read and parse HTTP response.
+  if (response_parser_->finished()) {
+    response_handler_(response_, error);
+    return;
+  }
 
-  // NOTE:
+  AsyncRead();
-  // We must stop trying to read once all content has been received,
+}
-  // because some servers will block extra call to read_some().
-  //while (!parser_.finished()) {
-  //  size_t length = socket_.read_some(boost::asio::buffer(buffer_), ec);
 
-    //if (length == 0 || ec) {
+void HttpAsyncClient::CheckDeadline() {
-    //  return kSocketReadError;
+  if (deadline_timer_.expires_at() <=
-    //}
+      boost::asio::deadline_timer::traits_type::now()) {
+    // The deadline has passed.
+    // The socket is closed so that any outstanding asynchronous operations
+    // are canceled.
+    boost::system::error_code ignored_ec;
+    socket_.close(ignored_ec);
 
-    // Parse the response piece just read.
+    deadline_timer_.expires_at(boost::posix_time::pos_infin);
-    // If the content has been fully received, next time flag "finished_"
+  }
-    // will be set.
-    //Error error = parser_.Parse(buffer_.data(), length);
 
-    //if (error != kNoError) {
+  // Put the actor back to sleep.
-    //  return error;
+  deadline_timer_.async_wait(std::bind(&HttpAsyncClient::CheckDeadline,
-    //}
+                                       shared_from_this()));
-  //}
 }
 
 }  // namespace webcc

src/webcc/http_async_client.h

@@ -2,61 +2,79 @@
 #define WEBCC_HTTP_ASYNC_CLIENT_H_
 
 #include <array>
+#include <functional>
+#include <memory>
 
-#include "boost/smart_ptr/scoped_ptr.hpp"
+#include "boost/asio/deadline_timer.hpp"
-
 #include "boost/asio/io_context.hpp"
 #include "boost/asio/ip/tcp.hpp"
 
-#include "webcc/common.h"
+#include "webcc/globals.h"
+#include "webcc/http_request.h"
+#include "webcc/http_response.h"
 #include "webcc/http_response_parser.h"
 
 namespace webcc {
 
-class HttpRequest;
+typedef std::function<void(HttpResponsePtr, Error)> HttpResponseHandler;
-class HttpResponse;
 
-typedef void(*HttpResponseHandler)(std::shared_ptr<HttpResponse>);
+class HttpAsyncClient : public std::enable_shared_from_this<HttpAsyncClient> {
-
-class HttpAsyncClient {
  public:
-  HttpAsyncClient(boost::asio::io_context& io_context);
+  explicit HttpAsyncClient(boost::asio::io_context& io_context);
 
-  Error SendRequest(std::shared_ptr<HttpRequest> request,
+  DELETE_COPY_AND_ASSIGN(HttpAsyncClient);
-                    HttpResponseHandler response_handler);
+
+  void set_timeout_seconds(int timeout_seconds) {
+    timeout_seconds_ = timeout_seconds;
+  }
+
+  // Asynchronously connect to the server, send the request, read the response,
+  // and call the |response_handler| when all these finish.
+  Error Request(HttpRequestPtr request, HttpResponseHandler response_handler);
 
  private:
-  void HandleResolve(boost::system::error_code ec,
+  using tcp = boost::asio::ip::tcp;
-                     boost::asio::ip::tcp::resolver::results_type results);
 
-  void DoConnect(boost::asio::ip::tcp::resolver::results_type::iterator endpoint_it);
+  void ResolveHandler(boost::system::error_code ec,
+                      tcp::resolver::results_type results);
 
-  void HandleConnect(boost::system::error_code ec,
+  void AsyncConnect(tcp::resolver::results_type::iterator endpoint_it);
-                     boost::asio::ip::tcp::resolver::results_type::iterator endpoint_it);
 
-  void DoWrite();
+  void ConnectHandler(boost::system::error_code ec,
+                      tcp::resolver::results_type::iterator endpoint_it);
 
-  void HandleWrite(boost::system::error_code ec);
+  void AsyncWrite();
+  void WriteHandler(boost::system::error_code ec);
 
-  void DoRead();
+  void AsyncRead();
+  void ReadHandler(boost::system::error_code ec, std::size_t length);
 
-  void HandleRead(boost::system::error_code ec, std::size_t length);
+  void CheckDeadline();
 
-private:
+  tcp::socket socket_;
-  boost::asio::ip::tcp::socket socket_;
 
   std::shared_ptr<HttpRequest> request_;
 
-  std::unique_ptr<boost::asio::ip::tcp::resolver> resolver_;
+  std::unique_ptr<tcp::resolver> resolver_;
-  boost::asio::ip::tcp::resolver::results_type endpoints_;
+  tcp::resolver::results_type endpoints_;
 
   std::array<char, kBufferSize> buffer_;
 
-  std::unique_ptr<HttpResponseParser> parser_;
+  std::unique_ptr<HttpResponseParser> response_parser_;
 
-  std::shared_ptr<HttpResponse> response_;
+  HttpResponsePtr response_;
+  HttpResponseHandler response_handler_;
+
+  // Maximum seconds to wait before the client cancels the operation.
+  // Only for receiving response from server.
+  int timeout_seconds_;
+
+  // Timer for the timeout control.
+  boost::asio::deadline_timer deadline_timer_;
 };
 
+typedef std::shared_ptr<HttpAsyncClient> HttpAsyncClientPtr;
+
 }  // namespace webcc
 
 #endif  // WEBCC_HTTP_ASYNC_CLIENT_H_

src/webcc/http_client.cc

@@ -19,43 +19,33 @@
 
 namespace webcc {
 
-static const int kConnectMaxSeconds = 10;
-static const int kSendMaxSeconds = 10;
-static const int kReceiveMaxSeconds = 30;
-
 HttpClient::HttpClient()
     : socket_(io_context_),
-      timeout_seconds_(kReceiveMaxSeconds),
+      timeout_seconds_(kMaxReceiveSeconds),
       deadline_timer_(io_context_) {
   deadline_timer_.expires_at(boost::posix_time::pos_infin);
 
+  response_.reset(new HttpResponse());
+  response_parser_.reset(new HttpResponseParser(response_.get()));
+
   // Start the persistent actor that checks for deadline expiry.
   CheckDeadline();
 }
 
-Error HttpClient::Request(const HttpRequest& request, HttpResponse* response) {
+bool HttpClient::Request(const HttpRequest& request) {
-  assert(response != nullptr);
+  if ((error_ = Connect(request)) != kNoError) {
-
+    return false;
-  Error error = kNoError;
-
-  if ((error = Connect(request)) != kNoError) {
-    return error;
   }
 
-  // Send HTTP request.
+  if ((error_ = SendReqeust(request)) != kNoError) {
-
+    return false;
-  if ((error = SendReqeust(request)) != kNoError) {
-    return error;
   }
 
-  // Read and parse HTTP response.
+  if ((error_ = ReadResponse()) != kNoError) {
+    return false;
+  }
 
-  // NOTE: Don't use make_unique because it's since C++14.
+  return true;
-  parser_.reset(new HttpResponseParser(response));
-
-  error = ReadResponse(response);
-
-  return error;
 }
 
 Error HttpClient::Connect(const HttpRequest& request) {
@@ -72,15 +62,13 @@ Error HttpClient::Connect(const HttpRequest& request) {
   auto endpoints = resolver.resolve(tcp::v4(), request.host(), port, ec);
 
   if (ec) {
-    LOG_ERRO("cannot resolve host: %s, %s",
+    LOG_ERRO("Can't resolve host (%s): %s, %s", ec.message().c_str(),
-             request.host().c_str(),
+             request.host().c_str(), port.c_str());
-             port.c_str());
-
     return kHostResolveError;
   }
 
   deadline_timer_.expires_from_now(
-      boost::posix_time::seconds(kConnectMaxSeconds));
+      boost::posix_time::seconds(kMaxConnectSeconds));
 
   ec = boost::asio::error::would_block;
 
@@ -110,9 +98,9 @@ Error HttpClient::Connect(const HttpRequest& request) {
 }
 
 Error HttpClient::SendReqeust(const HttpRequest& request) {
-  LOG_VERB("http request:\n{\n%s}", request.Dump().c_str());
+  LOG_VERB("HTTP request:\n%s", request.Dump(4, "> ").c_str());
 
-  deadline_timer_.expires_from_now(boost::posix_time::seconds(kSendMaxSeconds));
+  deadline_timer_.expires_from_now(boost::posix_time::seconds(kMaxSendSeconds));
 
   boost::system::error_code ec = boost::asio::error::would_block;
 
@@ -132,7 +120,7 @@ Error HttpClient::SendReqeust(const HttpRequest& request) {
   return kNoError;
 }
 
-Error HttpClient::ReadResponse(HttpResponse* response) {
+Error HttpClient::ReadResponse() {
   deadline_timer_.expires_from_now(
       boost::posix_time::seconds(timeout_seconds_));
 
@@ -141,31 +129,33 @@ Error HttpClient::ReadResponse(HttpResponse* response) {
 
   socket_.async_read_some(
       boost::asio::buffer(buffer_),
-      [this, &ec, &error, response](boost::system::error_code inner_ec,
+      [this, &ec, &error](boost::system::error_code inner_ec,
                           std::size_t length) {
         ec = inner_ec;
 
         if (inner_ec || length == 0) {
+          LOG_ERRO("Socket read error.");
           error = kSocketReadError;
-        } else {
-          // Parse the response piece just read.
-          // If the content has been fully received, next time flag "finished_"
-          // will be set.
-          error = parser_->Parse(buffer_.data(), length);
-
-          if (error != kNoError) {
-            LOG_ERRO("failed to parse http response.");
           return;
         }
 
-          if (parser_->finished()) {
+        // Parse the response piece just read.
+        // If the content has been fully received, next time flag "finished_"
+        // will be set.
+        error = response_parser_->Parse(buffer_.data(), length);
+
+        if (error != kNoError) {
+          LOG_ERRO("Failed to parse HTTP response.");
+          return;
+        }
+
+        if (response_parser_->finished()) {
           // Stop trying to read once all content has been received,
           // because some servers will block extra call to read_some().
           return;
         }
 
-          ReadResponse(response);
+        ReadResponse();
-        }
       });
 
   // Block until the asynchronous operation has completed.
@@ -174,7 +164,7 @@ Error HttpClient::ReadResponse(HttpResponse* response) {
   } while (ec == boost::asio::error::would_block);
 
   if (error == kNoError) {
-    LOG_VERB("http response:\n{\n%s}", response->Dump().c_str());
+    LOG_VERB("HTTP response:\n%s", response_->Dump(4, "> ").c_str());
   }
 
   return error;

src/webcc/http_client.h

@@ -9,32 +9,37 @@
 #include "boost/asio/ip/tcp.hpp"
 
 #include "webcc/globals.h"
+#include "webcc/http_request.h"
+#include "webcc/http_response.h"
 #include "webcc/http_response_parser.h"
 
 namespace webcc {
 
-class HttpRequest;
-class HttpResponse;
-
 class HttpClient {
  public:
   HttpClient();
+
   ~HttpClient() = default;
 
+  DELETE_COPY_AND_ASSIGN(HttpClient);
+
   void set_timeout_seconds(int timeout_seconds) {
     timeout_seconds_ = timeout_seconds;
   }
 
-  // Connect to the server, send the request, wait until the response is
+  HttpResponsePtr response() const { return response_; }
-  // received.
+
-  Error Request(const HttpRequest& request, HttpResponse* response);
+  Error error() const { return error_; }
+
+  // Connect to server, send request, wait until response is received.
+  bool Request(const HttpRequest& request);
 
  private:
   Error Connect(const HttpRequest& request);
 
   Error SendReqeust(const HttpRequest& request);
 
-  Error ReadResponse(HttpResponse* response);
+  Error ReadResponse();
 
   void CheckDeadline();
 
@@ -44,7 +49,10 @@ class HttpClient {
 
   std::array<char, kBufferSize> buffer_;
 
-  std::unique_ptr<HttpResponseParser> parser_;
+  HttpResponsePtr response_;
+  std::unique_ptr<HttpResponseParser> response_parser_;
+
+  Error error_ = kNoError;
 
   // Maximum seconds to wait before the client cancels the operation.
   // Only for receiving response from server.
@@ -52,8 +60,6 @@ class HttpClient {
 
   // Timer for the timeout control.
   boost::asio::deadline_timer deadline_timer_;
-
-  DISALLOW_COPY_AND_ASSIGN(HttpClient);
 };
 
 }  // namespace webcc

src/webcc/http_message.cc

@@ -1,5 +1,9 @@
 #include "webcc/http_message.h"
 
+#include <sstream>
+
+#include "boost/algorithm/string.hpp"
+
 namespace webcc {
 
 void HttpMessage::SetHeader(const std::string& name, const std::string& value) {
@@ -13,4 +17,45 @@ void HttpMessage::SetHeader(const std::string& name, const std::string& value) {
   headers_.push_back({ name, value });
 }
 
+void HttpMessage::Dump(std::ostream& os, std::size_t indent,
+                       const std::string& prefix) const {
+  std::string indent_str;
+  if (indent > 0) {
+    indent_str.append(indent, ' ');
+  }
+  indent_str.append(prefix);
+
+  os << indent_str << start_line_;
+
+  for (const HttpHeader& h : headers_) {
+    os << indent_str << h.name << ": " << h.value << std::endl;
+  }
+
+  os << std::endl;
+
+  if (!content_.empty()) {
+    if (indent == 0) {
+      os << content_ << std::endl;
+    } else {
+      std::vector<std::string> splitted;
+      boost::split(splitted, content_, boost::is_any_of("\r\n"));
+      for (const std::string& line : splitted) {
+        os << indent_str << line << std::endl;
+      }
+    }
+  }
+}
+
+std::string HttpMessage::Dump(std::size_t indent,
+                              const std::string& prefix) const {
+  std::stringstream ss;
+  Dump(ss, indent, prefix);
+  return ss.str();
+}
+
+std::ostream& operator<<(std::ostream& os, const HttpMessage& message) {
+  message.Dump(os);
+  return os;
+}
+
 }  // namespace webcc

src/webcc/http_message.h

@@ -53,6 +53,14 @@ class HttpMessage {
     SetContentLength(content_.size());
   }
 
+  // Dump to output stream.
+  void Dump(std::ostream& os, std::size_t indent = 0,
+            const std::string& prefix = "") const;
+
+  // Dump to string, only used by logger.
+  std::string Dump(std::size_t indent = 0,
+                   const std::string& prefix = "") const;
+
  protected:
   void SetContentLength(std::size_t content_length) {
     content_length_ = content_length;
@@ -69,6 +77,8 @@ class HttpMessage {
   std::string content_;
 };
 
+std::ostream& operator<<(std::ostream& os, const HttpMessage& message);
+
 }  // namespace webcc
 
 #endif  // WEBCC_HTTP_MESSAGE_H_

src/webcc/http_parser.cc

@@ -117,7 +117,8 @@ void HttpParser::ParseContentLength(const std::string& line) {
 }
 
 void HttpParser::Finish() {
-  message_->SetContent(content_);
+  // Move temp content to message.
+  message_->SetContent(std::move(content_));
   finished_ = true;
 }
 

src/webcc/http_parser.h

@@ -16,6 +16,8 @@ class HttpParser {
 
   virtual ~HttpParser() = default;
 
+  DELETE_COPY_AND_ASSIGN(HttpParser);
+
   bool finished() const {
     return finished_;
   }
@@ -50,8 +52,6 @@ class HttpParser {
   bool content_length_parsed_;
   bool header_parsed_;
   bool finished_;
-
-  DISALLOW_COPY_AND_ASSIGN(HttpParser);
 };
 
 }  // namespace webcc

src/webcc/http_request.cc

@@ -1,27 +1,7 @@
 #include "webcc/http_request.h"
 
-#include <sstream>
-
-#include "boost/algorithm/string.hpp"
-
 namespace webcc {
 
-std::ostream& operator<<(std::ostream& os, const HttpRequest& request) {
-  os << request.start_line();
-
-  for (const HttpHeader& h : request.headers_) {
-    os << h.name << ": " << h.value << std::endl;
-  }
-
-  os << std::endl;
-
-  if (!request.content().empty()) {
-    os << request.content() << std::endl;
-  }
-
-  return os;
-}
-
 void HttpRequest::SetHost(const std::string& host, const std::string& port) {
   host_ = host;
   port_ = port;
@@ -73,10 +53,4 @@ std::vector<boost::asio::const_buffer> HttpRequest::ToBuffers() const {
   return buffers;
 }
 
-std::string HttpRequest::Dump() const {
-  std::stringstream ss;
-  ss << *this;
-  return ss.str();
-}
-
 }  // namespace webcc

src/webcc/http_request.h

@@ -1,6 +1,7 @@
 #ifndef WEBCC_HTTP_REQUEST_H_
 #define WEBCC_HTTP_REQUEST_H_
 
+#include <memory>
 #include <string>
 #include <vector>
 
@@ -10,10 +11,6 @@
 
 namespace webcc {
 
-class HttpRequest;
-
-std::ostream& operator<<(std::ostream& os, const HttpRequest& request);
-
 class HttpRequest : public HttpMessage {
  public:
   HttpRequest() = default;
@@ -60,12 +57,7 @@ class HttpRequest : public HttpMessage {
   // and not be changed until the write operation has completed.
   std::vector<boost::asio::const_buffer> ToBuffers() const;
 
-  // Dump as string, only used by logger.
-  std::string Dump() const;
-
  private:
-  friend std::ostream& operator<<(std::ostream& os, const HttpRequest& request);
-
   // HTTP method.
   std::string method_;
 
@@ -78,6 +70,8 @@ class HttpRequest : public HttpMessage {
   std::string port_;
 };
 
+typedef std::shared_ptr<HttpRequest> HttpRequestPtr;
+
 }  // namespace webcc
 
 #endif  // WEBCC_HTTP_REQUEST_H_

src/webcc/http_request_handler.h

@@ -21,6 +21,8 @@ class HttpRequestHandler {
   HttpRequestHandler() = default;
   virtual ~HttpRequestHandler() = default;
 
+  DELETE_COPY_AND_ASSIGN(HttpRequestHandler);
+
   // Put the session into the queue.
   void Enqueue(HttpSessionPtr session);
 
@@ -38,8 +40,6 @@ class HttpRequestHandler {
 
   Queue<HttpSessionPtr> queue_;
   boost::thread_group workers_;
-
-  DISALLOW_COPY_AND_ASSIGN(HttpRequestHandler);
 };
 
 }  // namespace webcc

src/webcc/http_response.cc

@@ -1,26 +1,7 @@
 #include "webcc/http_response.h"
 
-#include <iostream>
-#include <sstream>
-
 namespace webcc {
 
-std::ostream& operator<<(std::ostream& os, const HttpResponse& response) {
-  os << response.start_line();
-
-  for (const HttpHeader& h : response.headers_) {
-    os << h.name << ": " << h.value << std::endl;
-  }
-
-  os << std::endl;
-
-  if (!response.content().empty()) {
-    os << response.content() << std::endl;
-  }
-
-  return os;
-}
-
 namespace status_strings {
 
 const std::string OK = "HTTP/1.1 200 OK\r\n";
@@ -115,10 +96,4 @@ HttpResponse HttpResponse::Fault(HttpStatus::Enum status) {
   return response;
 }
 
-std::string HttpResponse::Dump() const {
-  std::stringstream ss;
-  ss << *this;
-  return ss.str();
-}
-
 }  // namespace webcc

src/webcc/http_response.h

@@ -1,6 +1,7 @@
 #ifndef WEBCC_HTTP_RESPONSE_H_
 #define WEBCC_HTTP_RESPONSE_H_
 
+#include <memory>
 #include <string>
 #include <vector>
 
@@ -10,10 +11,6 @@
 
 namespace webcc {
 
-class HttpResponse;
-
-std::ostream& operator<<(std::ostream& os, const HttpResponse& response);
-
 class HttpResponse : public HttpMessage {
  public:
   HttpResponse() = default;
@@ -32,19 +29,15 @@ class HttpResponse : public HttpMessage {
   // and not be changed until the write operation has completed.
   std::vector<boost::asio::const_buffer> ToBuffers() const;
 
-  // Dump as string, only used by logger.
-  std::string Dump() const;
-
   // Get a fault response when HTTP status is not OK.
   static HttpResponse Fault(HttpStatus::Enum status);
 
  private:
-  friend std::ostream& operator<<(std::ostream& os,
-                                  const HttpResponse& response);
-
   int status_ = HttpStatus::kOK;
 };
 
+typedef std::shared_ptr<HttpResponse> HttpResponsePtr;
+
 }  // namespace webcc
 
 #endif  // WEBCC_HTTP_RESPONSE_H_

src/webcc/http_server.h

@@ -25,6 +25,8 @@ class HttpServer {
 
   virtual ~HttpServer() = default;
 
+  DELETE_COPY_AND_ASSIGN(HttpServer);
+
   // Run the server's io_service loop.
   void Run();
 
@@ -49,8 +51,6 @@ class HttpServer {
 
   // Acceptor used to listen for incoming connections.
   boost::scoped_ptr<boost::asio::ip::tcp::acceptor> acceptor_;
-
-  DISALLOW_COPY_AND_ASSIGN(HttpServer);
 };
 
 }  // namespace webcc

src/webcc/http_session.h

@@ -18,14 +18,13 @@ class HttpRequestHandler;
 
 class HttpSession : public std::enable_shared_from_this<HttpSession> {
  public:
-  HttpSession(const HttpSession&) = delete;
-  HttpSession& operator=(const HttpSession&) = delete;
-
   HttpSession(boost::asio::ip::tcp::socket socket,
               HttpRequestHandler* handler);
 
   ~HttpSession() = default;
 
+  DELETE_COPY_AND_ASSIGN(HttpSession);
+
   const HttpRequest& request() const {
     return request_;
   }

src/webcc/rest_async_client.cc

@@ -0,0 +1,27 @@
+#include "webcc/rest_async_client.h"
+
+namespace webcc {
+
+void RestAsyncClient::Request(const std::string& method,
+                              const std::string& url,
+                              const std::string& content,
+                              HttpResponseHandler response_handler) {
+  response_handler_ = response_handler;
+
+  HttpRequestPtr request(new webcc::HttpRequest());
+
+  request->set_method(method);
+  request->set_url(url);
+  request->SetHost(host_, port_);
+
+  if (!content.empty()) {
+    request->SetContent(content);
+  }
+
+  request->Build();
+
+  HttpAsyncClientPtr http_client(new HttpAsyncClient(io_context_));
+  http_client->Request(request, response_handler_);
+}
+
+}  // namespace webcc

src/webcc/rest_async_client.h

@@ -0,0 +1,60 @@
+#ifndef WEBCC_REST_ASYNC_CLIENT_H_
+#define WEBCC_REST_ASYNC_CLIENT_H_
+
+#include <string>
+
+#include "webcc/globals.h"
+#include "webcc/http_async_client.h"
+
+namespace webcc {
+
+class RestAsyncClient {
+ public:
+  RestAsyncClient(boost::asio::io_context& io_context,
+                   const std::string& host, const std::string& port)
+      : io_context_(io_context), host_(host), port_(port) {
+  }
+
+  void Get(const std::string& url,
+           HttpResponseHandler response_handler) {
+    Request(kHttpGet, url, "", response_handler);
+  }
+
+  void Post(const std::string& url,
+            const std::string& content,
+            HttpResponseHandler response_handler) {
+    Request(kHttpPost, url, content, response_handler);
+  }
+
+  void Put(const std::string& url,
+           const std::string& content,
+           HttpResponseHandler response_handler) {
+    Request(kHttpPut, url, content, response_handler);
+  }
+
+  void Patch(const std::string& url,
+             const std::string& content,
+             HttpResponseHandler response_handler) {
+    Request(kHttpPatch, url, content, response_handler);
+  }
+
+  void Delete(const std::string& url,
+              HttpResponseHandler response_handler) {
+    Request(kHttpDelete, url, "", response_handler);
+  }
+
+ private:
+  void Request(const std::string& method,
+               const std::string& url,
+               const std::string& content,
+               HttpResponseHandler response_handler);
+
+  boost::asio::io_context& io_context_;
+  std::string host_;
+  std::string port_;
+  HttpResponseHandler response_handler_;
+};
+
+}  // namespace webcc
+
+#endif  // WEBCC_REST_ASYNC_CLIENT_H_

src/webcc/rest_client.cc

@@ -8,8 +8,7 @@ namespace webcc {
 
 bool RestClient::Request(const std::string& method,
                          const std::string& url,
-                         const std::string& content,
+                         const std::string& content) {
-                         HttpResponse* response) {
   HttpRequest request;
 
   request.set_method(method);
@@ -23,9 +22,17 @@ bool RestClient::Request(const std::string& method,
   request.Build();
 
   HttpClient http_client;
-  Error error = http_client.Request(request, response);
+  http_client.set_timeout_seconds(timeout_seconds_);
 
-  return error == kNoError;
+  error_ = kNoError;
+
+  if (!http_client.Request(request)) {
+    error_ = http_client.error();
+    return false;
+  }
+
+  response_ = http_client.response();
+  return true;
 }
 
 }  // namespace webcc

src/webcc/rest_client.h

@@ -4,51 +4,60 @@
 #include <string>
 
 #include "webcc/globals.h"
+#include "webcc/http_response.h"
 
 namespace webcc {
 
-class HttpResponse;
-
 class RestClient {
  public:
   RestClient(const std::string& host, const std::string& port)
       : host_(host), port_(port) {
   }
 
-  bool Get(const std::string& url, HttpResponse* response) {
+  void set_timeout_seconds(int timeout_seconds) {
-    return Request(kHttpGet, url, "", response);
+    timeout_seconds_ = timeout_seconds;
   }
 
-  bool Post(const std::string& url,
+  HttpResponsePtr response() const { return response_; }
-            const std::string& content,
+  int response_status() const { return response_->status(); }
-            HttpResponse* response) {
+  const std::string& response_content() const { return response_->content(); }
-    return Request(kHttpPost, url, content, response);
+
+  Error error() const { return error_; }
+
+  bool Get(const std::string& url) {
+    return Request(kHttpGet, url, "");
   }
 
-  bool Put(const std::string& url,
+  bool Post(const std::string& url, const std::string& content) {
-           const std::string& content,
+    return Request(kHttpPost, url, content);
-           HttpResponse* response) {
-    return Request(kHttpPut, url, content, response);
   }
 
-  bool Patch(const std::string& url,
+  bool Put(const std::string& url, const std::string& content) {
-             const std::string& content,
+    return Request(kHttpPut, url, content);
-             HttpResponse* response) {
-    return Request(kHttpPatch, url, content, response);
   }
 
-  bool Delete(const std::string& url, HttpResponse* response) {
+  bool Patch(const std::string& url, const std::string& content) {
-    return Request(kHttpDelete, url, "", response);
+    return Request(kHttpPatch, url, content);
+  }
+
+  bool Delete(const std::string& url) {
+    return Request(kHttpDelete, url, "");
   }
 
  private:
   bool Request(const std::string& method,
                const std::string& url,
-               const std::string& content,
+               const std::string& content);
-               HttpResponse* response);
 
   std::string host_;
   std::string port_;
+
+  // -1 means default timeout (normally 30s) will be used.
+  int timeout_seconds_ = -1;
+
+  HttpResponsePtr response_;
+
+  Error error_ = kNoError;
 };
 
 }  // namespace webcc

src/webcc/rest_request_handler.h

@@ -12,6 +12,7 @@ namespace webcc {
 
 class RestRequestHandler : public HttpRequestHandler {
  public:
+  RestRequestHandler() = default;
   ~RestRequestHandler() override = default;
 
   bool Bind(RestServicePtr service, const std::string& url, bool is_regex);

src/webcc/rest_service_manager.h

@@ -14,6 +14,8 @@ class RestServiceManager {
  public:
   RestServiceManager() = default;
 
+  DELETE_COPY_AND_ASSIGN(RestServiceManager);
+
   // Add a service and bind it with the given URL.
   // The |url| should start with "/" and will be treated as a regular expression
   // if |regex| is true.
@@ -59,8 +61,6 @@ class RestServiceManager {
   };
 
   std::vector<ServiceItem> service_items_;
-
-  DISALLOW_COPY_AND_ASSIGN(RestServiceManager);
 };
 
 }  // namespace webcc

src/webcc/soap_client.cc

@@ -54,16 +54,14 @@ Error SoapClient::Call(const std::string& operation,
     http_client.set_timeout_seconds(timeout_seconds_);
   }
 
-  Error error = http_client.Request(http_request, &http_response);
+  if (!http_client.Request(http_request)) {
-
+    return http_client.error();
-  if (error != kNoError) {
-    return error;
   }
 
   SoapResponse soap_response;
   soap_response.set_result_name(result_name_);
 
-  if (!soap_response.FromXml(http_response.content())) {
+  if (!soap_response.FromXml(http_client.response()->content())) {
     return kXmlError;
   }