Fix async client issues.

example/http/async_client/main.cc

@@ -3,7 +3,7 @@
 #include "boost/asio/io_context.hpp"
 
 #include "webcc/logger.h"
-#include "webcc/http_async_client.h"
+#include "webcc/async_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:
@@ -19,15 +19,20 @@ void Test(boost::asio::io_context& ioc) {
 
   request->Build();
 
-  webcc::HttpAsyncClientPtr client(new webcc::HttpAsyncClient(ioc));
+  webcc::HttpAsyncClientPtr client(new webcc::AsyncHttpClient(ioc));
 
   // Response handler.
   auto handler = [](std::shared_ptr<webcc::HttpResponse> response,
-                    webcc::Error error) {
+                    webcc::Error error,
+                    bool timed_out) {
     if (error == webcc::kNoError) {
       std::cout << response->content() << std::endl;
     } else {
-      std::cout << webcc::DescribeError(error) << std::endl;
+      std::cout << webcc::DescribeError(error);
+      if (timed_out) {
+        std::cout << " (timed out)";
+      }
+      std::cout << std::endl;
     }
   };
 

example/rest/book_async_client/main.cc

@@ -3,7 +3,7 @@
 #include "json/json.h"
 
 #include "webcc/logger.h"
-#include "webcc/rest_async_client.h"
+#include "webcc/async_rest_client.h"
 
 // -----------------------------------------------------------------------------
 
@@ -44,7 +44,7 @@ class BookListClient {
   }
 
  private:
-  webcc::RestAsyncClient rest_client_;
+  webcc::AsyncRestClient rest_client_;
 };
 
 // -----------------------------------------------------------------------------
@@ -84,7 +84,7 @@ public:
   }
 
 private:
-  webcc::RestAsyncClient rest_client_;
+  webcc::AsyncRestClient rest_client_;
 };
 
 // -----------------------------------------------------------------------------
@@ -113,7 +113,8 @@ int main(int argc, char* argv[]) {
 
   // Response handler.
   auto handler = [](std::shared_ptr<webcc::HttpResponse> response,
-                    webcc::Error error) {
+                    webcc::Error error,
+                    bool timed_out) {
     if (error == webcc::kNoError) {
       std::cout << response->content() << std::endl;
     } else {

example/rest/book_client/main.cc

@@ -34,8 +34,8 @@ protected:
 
   void PrintError() {
     std::cout << webcc::DescribeError(rest_client_.error());
-    if (rest_client_.timeout_occurred()) {
+    if (rest_client_.timed_out()) {
-      std::cout << " (timeout)";
+      std::cout << " (timed out)";
     }
     std::cout << std::endl;
   }

src/webcc/CMakeLists.txt

@@ -2,10 +2,12 @@
 add_definitions(-DBOOST_ASIO_NO_DEPRECATED)
 
 set(SRCS
+	async_http_client.cc
+	async_http_client.h
+	async_rest_client.cc
+	async_rest_client.h
 	globals.cc
 	globals.h
-	http_async_client.cc
-	http_async_client.h
 	http_client.cc
 	http_client.h
 	http_connection.cc
@@ -29,8 +31,6 @@ 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
@@ -48,7 +48,23 @@ set(SRCS
 
 if(WEBCC_ENABLE_SOAP)
 	# SOAP specific sources.
-	file(GLOB SOAP_SRCS soap_*.cc soap_*.h)
+	set(SOAP_SRCS
+		soap_client.cc
+		soap_message.h
+		soap_request_handler.cc
+		soap_response.h
+		soap_xml.cc
+		soap_client.h
+		soap_request.cc
+		soap_request_handler.h
+		soap_server.h
+		soap_xml.h
+		soap_message.cc
+		soap_request.h
+		soap_response.cc
+		soap_service.h
+		)
+
 	set(SRCS ${SRCS} ${SOAP_SRCS})
 endif()
 

src/webcc/async_http_client.cc

@@ -0,0 +1,215 @@
+#include "webcc/async_http_client.h"
+
+#include "boost/asio/connect.hpp"
+#include "boost/asio/read.hpp"
+#include "boost/asio/write.hpp"
+
+#include "webcc/logger.h"
+#include "webcc/utility.h"
+
+// NOTE:
+// The timeout control is inspired by the following Asio example:
+//     example\cpp03\timeouts\async_tcp_client.cpp
+
+namespace webcc {
+
+AsyncHttpClient::AsyncHttpClient(boost::asio::io_context& io_context)
+    : socket_(io_context),
+      timeout_seconds_(kMaxReceiveSeconds),
+      deadline_(io_context) {
+  resolver_.reset(new tcp::resolver(io_context));
+  response_.reset(new HttpResponse());
+  response_parser_.reset(new HttpResponseParser(response_.get()));
+}
+
+Error AsyncHttpClient::Request(std::shared_ptr<HttpRequest> request,
+                               HttpResponseHandler response_handler) {
+  assert(request);
+  assert(response_handler);
+
+  LOG_VERB("HTTP request:\n%s", request->Dump(4, "> ").c_str());
+
+  request_ = request;
+  response_handler_ = response_handler;
+
+  std::string port = request->port();
+  if (port.empty()) {
+    port = "80";
+  }
+
+  auto handler = std::bind(&AsyncHttpClient::ResolveHandler,
+                           shared_from_this(),
+                           std::placeholders::_1,
+                           std::placeholders::_2);
+
+  resolver_->async_resolve(tcp::v4(), request->host(), port, handler);
+
+  return kNoError;
+}
+
+void AsyncHttpClient::Stop() {
+  stopped_ = true;
+  boost::system::error_code ignored_ec;
+  socket_.close(ignored_ec);
+  deadline_.cancel();
+}
+
+void AsyncHttpClient::ResolveHandler(boost::system::error_code ec,
+                                     tcp::resolver::results_type results) {
+  if (ec) {
+    LOG_ERRO("Can't resolve host (%s): %s, %s", ec.message().c_str(),
+             request_->host().c_str(), request_->port().c_str());
+    response_handler_(response_, kHostResolveError, timed_out_);
+  } else {
+    // Start the connect actor.
+    endpoints_ = results;
+    AsyncConnect(endpoints_.begin());
+
+    // Start the deadline actor. You will note that we're not setting any
+    // particular deadline here. Instead, the connect and input actors will
+    // update the deadline prior to each asynchronous operation.
+    deadline_.async_wait(std::bind(&AsyncHttpClient::CheckDeadline, this));
+  }
+}
+
+void AsyncHttpClient::AsyncConnect(EndpointIterator endpoint_iter) {
+  if (endpoint_iter != endpoints_.end()) {
+    LOG_VERB("Connecting to [%s]...",
+             EndpointToString(endpoint_iter->endpoint()).c_str());
+
+    // Set a deadline for the connect operation.
+    deadline_.expires_from_now(boost::posix_time::seconds(kMaxConnectSeconds));
+
+    timed_out_ = false;
+
+    // Start the asynchronous connect operation.
+    socket_.async_connect(endpoint_iter->endpoint(),
+                          std::bind(&AsyncHttpClient::ConnectHandler,
+                                    shared_from_this(),
+                                    std::placeholders::_1,
+                                    endpoint_iter));
+  } else {
+    // There are no more endpoints to try. Shut down the client.
+    Stop();
+    response_handler_(response_, kEndpointConnectError, timed_out_);
+  }
+}
+
+void AsyncHttpClient::ConnectHandler(boost::system::error_code ec,
+                                     EndpointIterator endpoint_iter) {
+  if (stopped_) {
+    return;
+  }
+
+  if (!socket_.is_open()) {
+    // The async_connect() function automatically opens the socket at the start
+    // of the asynchronous operation. If the socket is closed at this time then
+    // the timeout handler must have run first.
+    LOG_WARN("Connect timed out.");
+
+    // Try the next available endpoint.
+    AsyncConnect(++endpoint_iter);
+  } else if (ec) {    
+    // The connect operation failed before the deadline expired.
+    // We need to close the socket used in the previous connection attempt
+    // before starting a new one.
+    socket_.close();
+
+    // Try the next available endpoint.
+    AsyncConnect(++endpoint_iter);
+  } else {
+    // Connection established.
+    AsyncWrite();
+  }
+}
+
+void AsyncHttpClient::AsyncWrite() {
+  if (stopped_) {
+    return;
+  }
+
+  deadline_.expires_from_now(boost::posix_time::seconds(kMaxSendSeconds));
+
+  boost::asio::async_write(socket_,
+                           request_->ToBuffers(),
+                           std::bind(&AsyncHttpClient::WriteHandler,
+                                     shared_from_this(),
+                                     std::placeholders::_1));
+}
+
+void AsyncHttpClient::WriteHandler(boost::system::error_code ec) {
+  if (stopped_) {
+    return;
+  }
+
+  if (ec) {
+    Stop();
+    response_handler_(response_, kSocketWriteError, timed_out_);
+  } else {
+    deadline_.expires_from_now(boost::posix_time::seconds(timeout_seconds_));
+    AsyncRead();
+  }
+}
+
+void AsyncHttpClient::AsyncRead() {
+  socket_.async_read_some(boost::asio::buffer(buffer_),
+                          std::bind(&AsyncHttpClient::ReadHandler,
+                                    shared_from_this(),
+                                    std::placeholders::_1,
+                                    std::placeholders::_2));
+}
+
+void AsyncHttpClient::ReadHandler(boost::system::error_code ec,
+                                  std::size_t length) {
+  if (stopped_) {
+    return;
+  }
+
+  if (ec || length == 0) {
+    Stop();
+    response_handler_(response_, kSocketReadError, timed_out_);
+    return;
+  }
+
+  // Parse the response piece just read.
+  // If the content has been fully received, |finished()| will be true.
+  if (!response_parser_->Parse(buffer_.data(), length)) {
+    Stop();
+    response_handler_(response_, kHttpError, timed_out_);
+    return;
+  }
+
+  if (response_parser_->finished()) {
+    LOG_VERB("HTTP response:\n%s", response_->Dump(4, "> ").c_str());
+    Stop();
+    response_handler_(response_, kNoError, timed_out_);
+    return;
+  }
+
+  AsyncRead();
+}
+
+void AsyncHttpClient::CheckDeadline() {
+  if (stopped_) {
+    return;
+  }
+
+  if (deadline_.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);
+
+    deadline_.expires_at(boost::posix_time::pos_infin);
+
+    timed_out_ = true;
+  }
+
+  // Put the actor back to sleep.
+  deadline_.async_wait(std::bind(&AsyncHttpClient::CheckDeadline,
+                                 shared_from_this()));
+}
+
+}  // namespace webcc

src/webcc/async_http_client.h

@@ -1,5 +1,5 @@
-#ifndef WEBCC_HTTP_ASYNC_CLIENT_H_
+#ifndef WEBCC_ASYNC_HTTP_CLIENT_H_
-#define WEBCC_HTTP_ASYNC_CLIENT_H_
+#define WEBCC_ASYNC_HTTP_CLIENT_H_
 
 #include <array>
 #include <functional>
@@ -16,13 +16,13 @@
 
 namespace webcc {
 
-typedef std::function<void(HttpResponsePtr, Error)> HttpResponseHandler;
+typedef std::function<void(HttpResponsePtr, Error, bool)> HttpResponseHandler;
 
-class HttpAsyncClient : public std::enable_shared_from_this<HttpAsyncClient> {
+class AsyncHttpClient : public std::enable_shared_from_this<AsyncHttpClient> {
  public:
-  explicit HttpAsyncClient(boost::asio::io_context& io_context);
+  explicit AsyncHttpClient(boost::asio::io_context& io_context);
 
-  DELETE_COPY_AND_ASSIGN(HttpAsyncClient);
+  DELETE_COPY_AND_ASSIGN(AsyncHttpClient);
 
   void set_timeout_seconds(int timeout_seconds) {
     timeout_seconds_ = timeout_seconds;
@@ -32,16 +32,22 @@ class HttpAsyncClient : public std::enable_shared_from_this<HttpAsyncClient> {
   // and call the |response_handler| when all these finish.
   Error Request(HttpRequestPtr request, HttpResponseHandler response_handler);
 
+  // Terminate all the actors to shut down the connection. It may be called by
+  // the user of the client class, or by the class itself in response to
+  // graceful termination or an unrecoverable error.
+  void Stop();
+
  private:
   using tcp = boost::asio::ip::tcp;
+  typedef tcp::resolver::results_type::iterator EndpointIterator;
 
   void ResolveHandler(boost::system::error_code ec,
                       tcp::resolver::results_type results);
 
-  void AsyncConnect(tcp::resolver::results_type::iterator endpoint_it);
+  void AsyncConnect(EndpointIterator endpoint_iter);
 
   void ConnectHandler(boost::system::error_code ec,
-                      tcp::resolver::results_type::iterator endpoint_it);
+                      EndpointIterator endpoint_iter);
 
   void AsyncWrite();
   void WriteHandler(boost::system::error_code ec);
@@ -51,6 +57,9 @@ class HttpAsyncClient : public std::enable_shared_from_this<HttpAsyncClient> {
 
   void CheckDeadline();
 
+  bool stopped_ = false;
+  bool timed_out_ = false;
+
   tcp::socket socket_;
 
   std::shared_ptr<HttpRequest> request_;
@@ -70,11 +79,11 @@ class HttpAsyncClient : public std::enable_shared_from_this<HttpAsyncClient> {
   int timeout_seconds_;
 
   // Timer for the timeout control.
-  boost::asio::deadline_timer deadline_timer_;
+  boost::asio::deadline_timer deadline_;
 };
 
-typedef std::shared_ptr<HttpAsyncClient> HttpAsyncClientPtr;
+typedef std::shared_ptr<AsyncHttpClient> HttpAsyncClientPtr;
 
 }  // namespace webcc
 
-#endif  // WEBCC_HTTP_ASYNC_CLIENT_H_
+#endif  // WEBCC_ASYNC_HTTP_CLIENT_H_

src/webcc/async_rest_client.cc

@@ -1,8 +1,8 @@
-#include "webcc/rest_async_client.h"
+#include "webcc/async_rest_client.h"
 
 namespace webcc {
 
-void RestAsyncClient::Request(const std::string& method,
+void AsyncRestClient::Request(const std::string& method,
                               const std::string& url,
                               const std::string& content,
                               HttpResponseHandler response_handler) {
@@ -20,7 +20,7 @@ void RestAsyncClient::Request(const std::string& method,
 
   request->Build();
 
-  HttpAsyncClientPtr http_client(new HttpAsyncClient(io_context_));
+  HttpAsyncClientPtr http_client(new AsyncHttpClient(io_context_));
   http_client->Request(request, response_handler_);
 }
 

src/webcc/async_rest_client.h

@@ -1,17 +1,17 @@
-#ifndef WEBCC_REST_ASYNC_CLIENT_H_
+#ifndef WEBCC_ASYNC_REST_CLIENT_H_
-#define WEBCC_REST_ASYNC_CLIENT_H_
+#define WEBCC_ASYNC_REST_CLIENT_H_
 
 #include <string>
 
 #include "webcc/globals.h"
-#include "webcc/http_async_client.h"
+#include "webcc/async_http_client.h"
 
 namespace webcc {
 
-class RestAsyncClient {
+class AsyncRestClient {
  public:
-  RestAsyncClient(boost::asio::io_context& io_context,
+  AsyncRestClient(boost::asio::io_context& io_context,
-                   const std::string& host, const std::string& port)
+                  const std::string& host, const std::string& port)
       : io_context_(io_context), host_(host), port_(port) {
   }
 
@@ -57,4 +57,4 @@ class RestAsyncClient {
 
 }  // namespace webcc
 
-#endif  // WEBCC_REST_ASYNC_CLIENT_H_
+#endif  // WEBCC_ASYNC_REST_CLIENT_H_

src/webcc/http_async_client.cc

@@ -1,155 +0,0 @@
-#include "webcc/http_async_client.h"
-
-#include "boost/asio/connect.hpp"
-#include "boost/asio/read.hpp"
-#include "boost/asio/write.hpp"
-
-#include "webcc/logger.h"
-
-namespace webcc {
-
-HttpAsyncClient::HttpAsyncClient(boost::asio::io_context& io_context)
-    : socket_(io_context),
-      timeout_seconds_(kMaxReceiveSeconds),
-      deadline_timer_(io_context) {
-  resolver_.reset(new tcp::resolver(io_context));
-  response_.reset(new HttpResponse());
-  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::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::ResolveHandler,
-                           shared_from_this(),
-                           std::placeholders::_1,
-                           std::placeholders::_2);
-
-  resolver_->async_resolve(tcp::v4(), request->host(), port, handler);
-
-  return kNoError;
-}
-
-void HttpAsyncClient::ResolveHandler(boost::system::error_code ec,
-                                     tcp::resolver::results_type results) {
-  if (ec) {
-    LOG_ERRO("Can't resolve host (%s): %s, %s", ec.message().c_str(),
-             request_->host().c_str(), request_->port().c_str());
-    response_handler_(response_, kHostResolveError);
-  } else {
-    endpoints_ = results;
-    AsyncConnect(endpoints_.begin());
-  }
-}
-
-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::ConnectHandler,
-                                    shared_from_this(),
-                                    std::placeholders::_1,
-                                    endpoint_it));
-  }
-}
-
-void HttpAsyncClient::ConnectHandler(
-    boost::system::error_code ec,
-    tcp::resolver::results_type::iterator endpoint_it) {
-  if (ec) {
-    // Will be here if the endpoint is IPv6.
-    response_handler_(response_, kEndpointConnectError);
-    socket_.close();
-    // Try the next available endpoint.
-    AsyncConnect(++endpoint_it);
-  } else {
-    AsyncWrite();
-  }
-}
-
-void HttpAsyncClient::AsyncWrite() {
-  deadline_timer_.expires_from_now(boost::posix_time::seconds(kMaxSendSeconds));
-
-  boost::asio::async_write(socket_,
-                           request_->ToBuffers(),
-                           std::bind(&HttpAsyncClient::WriteHandler,
-                                     shared_from_this(),
-                                     std::placeholders::_1));
-}
-
-void HttpAsyncClient::WriteHandler(boost::system::error_code ec) {
-  if (ec) {
-    response_handler_(response_, kSocketWriteError);
-  } else {
-    AsyncRead();
-  }
-}
-
-void HttpAsyncClient::AsyncRead() {
-  deadline_timer_.expires_from_now(
-      boost::posix_time::seconds(timeout_seconds_));
-
-  socket_.async_read_some(boost::asio::buffer(buffer_),
-                          std::bind(&HttpAsyncClient::ReadHandler,
-                                    shared_from_this(),
-                                    std::placeholders::_1,
-                                    std::placeholders::_2));
-}
-
-void HttpAsyncClient::ReadHandler(boost::system::error_code ec,
-                                  std::size_t length) {
-  if (ec || length == 0) {
-    response_handler_(response_, kSocketReadError);
-    return;
-  }
-
-  // Parse the response piece just read.
-  // If the content has been fully received, |finished()| will be true.
-  if (!response_parser_->Parse(buffer_.data(), length)) {
-    response_handler_(response_, kHttpError);
-    return;
-  }
-
-  if (response_parser_->finished()) {
-    response_handler_(response_, kHttpError);
-    return;
-  }
-
-  AsyncRead();
-}
-
-void HttpAsyncClient::CheckDeadline() {
-  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);
-
-    deadline_timer_.expires_at(boost::posix_time::pos_infin);
-  }
-
-  // Put the actor back to sleep.
-  deadline_timer_.async_wait(std::bind(&HttpAsyncClient::CheckDeadline,
-                                       shared_from_this()));
-}
-
-}  // namespace webcc

src/webcc/http_client.cc

@@ -22,15 +22,15 @@ namespace webcc {
 HttpClient::HttpClient()
     : socket_(io_context_),
       timeout_seconds_(kMaxReceiveSeconds),
-      deadline_timer_(io_context_) {
+      deadline_(io_context_) {
-  deadline_timer_.expires_at(boost::posix_time::pos_infin);
+  deadline_.expires_at(boost::posix_time::pos_infin);
 }
 
 bool HttpClient::Request(const HttpRequest& request) {
   response_.reset(new HttpResponse());
   response_parser_.reset(new HttpResponseParser(response_.get()));
 
-  timeout_occurred_ = false;
+  timed_out_ = false;
 
   // Start the persistent actor that checks for deadline expiry.
   CheckDeadline();
@@ -69,8 +69,7 @@ Error HttpClient::Connect(const HttpRequest& request) {
     return kHostResolveError;
   }
 
-  deadline_timer_.expires_from_now(
+  deadline_.expires_from_now(boost::posix_time::seconds(kMaxConnectSeconds));
-      boost::posix_time::seconds(kMaxConnectSeconds));
 
   ec = boost::asio::error::would_block;
 
@@ -90,7 +89,7 @@ Error HttpClient::Connect(const HttpRequest& request) {
   // or failed.
   if (ec || !socket_.is_open()) {
     if (!ec) {
-      timeout_occurred_ = true;
+      timed_out_ = true;
     }
     return kEndpointConnectError;
   }
@@ -101,7 +100,7 @@ Error HttpClient::Connect(const HttpRequest& request) {
 Error HttpClient::SendReqeust(const HttpRequest& request) {
   LOG_VERB("HTTP request:\n%s", request.Dump(4, "> ").c_str());
 
-  deadline_timer_.expires_from_now(boost::posix_time::seconds(kMaxSendSeconds));
+  deadline_.expires_from_now(boost::posix_time::seconds(kMaxSendSeconds));
 
   boost::system::error_code ec = boost::asio::error::would_block;
 
@@ -114,7 +113,6 @@ Error HttpClient::SendReqeust(const HttpRequest& request) {
     io_context_.run_one();
   } while (ec == boost::asio::error::would_block);
 
-  // TODO: timeout_occurred_
   if (ec) {
     return kSocketWriteError;
   }
@@ -134,8 +132,7 @@ Error HttpClient::ReadResponse() {
 }
 
 void HttpClient::DoReadResponse(Error* error) {
-  deadline_timer_.expires_from_now(
+  deadline_.expires_from_now(boost::posix_time::seconds(timeout_seconds_));
-      boost::posix_time::seconds(timeout_seconds_));
 
   boost::system::error_code ec = boost::asio::error::would_block;
 
@@ -176,7 +173,7 @@ void HttpClient::DoReadResponse(Error* error) {
 }
 
 void HttpClient::CheckDeadline() {
-  if (deadline_timer_.expires_at() <=
+  if (deadline_.expires_at() <=
       boost::asio::deadline_timer::traits_type::now()) {
     // The deadline has passed.
     // The socket is closed so that any outstanding asynchronous operations
@@ -184,14 +181,13 @@ void HttpClient::CheckDeadline() {
     boost::system::error_code ignored_ec;
     socket_.close(ignored_ec);
 
-    // TODO
+    deadline_.expires_at(boost::posix_time::pos_infin);
-    timeout_occurred_ = true;
 
-    deadline_timer_.expires_at(boost::posix_time::pos_infin);
+    timed_out_ = true;
   }
 
   // Put the actor back to sleep.
-  deadline_timer_.async_wait(std::bind(&HttpClient::CheckDeadline, this));
+  deadline_.async_wait(std::bind(&HttpClient::CheckDeadline, this));
 }
 
 }  // namespace webcc

src/webcc/http_client.h

@@ -31,7 +31,7 @@ class HttpClient {
 
   Error error() const { return error_; }
 
-  bool timeout_occurred() const { return timeout_occurred_; }
+  bool timed_out() const { return timed_out_; }
 
   // Connect to server, send request, wait until response is received.
   bool Request(const HttpRequest& request);
@@ -59,14 +59,13 @@ class HttpClient {
   Error error_ = kNoError;
 
   // If the error was caused by timeout or not.
-  bool timeout_occurred_ = false;
+  bool timed_out_ = false;
 
   // 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_;
-  boost::asio::deadline_timer deadline_timer_;
 };
 
 }  // namespace webcc

src/webcc/rest_client.cc

@@ -10,7 +10,7 @@ bool RestClient::Request(const std::string& method,
                          const std::string& content) {
   response_.reset();
   error_ = kNoError;
-  timeout_occurred_ = false;
+  timed_out_ = false;
 
   HttpRequest request;
 
@@ -29,7 +29,7 @@ bool RestClient::Request(const std::string& method,
 
   if (!http_client.Request(request)) {
     error_ = http_client.error();
-    timeout_occurred_ = http_client.timeout_occurred();
+    timed_out_ = http_client.timed_out();
     return false;
   }
 

src/webcc/rest_client.h

@@ -33,7 +33,7 @@ class RestClient {
 
   Error error() const { return error_; }
 
-  bool timeout_occurred() const { return timeout_occurred_; }
+  bool timed_out() const { return timed_out_; }
 
   bool Get(const std::string& url) {
     return Request(kHttpGet, url, "");
@@ -71,7 +71,7 @@ class RestClient {
   Error error_ = kNoError;
 
   // If the error was caused by timeout or not.
-  bool timeout_occurred_ = false;
+  bool timed_out_ = false;
 };
 
 }  // namespace webcc

src/webcc/soap_client.cc

@@ -55,7 +55,7 @@ Error SoapClient::Call(const std::string& operation,
   }
 
   if (!http_client.Request(http_request)) {
-    timeout_occurred_ = http_client.timeout_occurred();
+    timed_out_ = http_client.timed_out();
     return http_client.error();
   }
 

src/webcc/soap_client.h

@@ -11,12 +11,11 @@ namespace webcc {
 
 // Base class for your SOAP client.
 // Set URL, host, port, etc. in your sub-class before make the call.
-//
 class SoapClient {
  public:
   virtual ~SoapClient() = default;
 
-  bool timeout_occurred() const { return timeout_occurred_; }
+  bool timed_out() const { return timed_out_; }
 
  protected:
   SoapClient() = default;
@@ -31,7 +30,7 @@ class SoapClient {
   int timeout_seconds_ = -1;
 
   // If the error was caused by timeout or not.
-  bool timeout_occurred_ = false;
+  bool timed_out_ = false;
 
   SoapNamespace soapenv_ns_;  // SOAP envelope namespace.
   SoapNamespace service_ns_;  // Namespace for your web service.

src/webcc/utility.cc

@@ -1,28 +1,37 @@
 #include "webcc/utility.h"
 
-#include <iostream>
+#include <ostream>
+#include <sstream>
 
 using tcp = boost::asio::ip::tcp;
 
 namespace webcc {
 
-// Print the resolved endpoints.
+void PrintEndpoint(std::ostream& ostream,
-// NOTE: Endpoint is one word, don't use "end point".
+                   const boost::asio::ip::tcp::endpoint& endpoint) {
-void DumpEndpoints(const tcp::resolver::results_type& endpoints) {
+  ostream << endpoint;
-  std::cout << "Endpoints: " << endpoints.size() << std::endl;
+  if (endpoint.protocol() == tcp::v4()) {
-
+    ostream << ", v4";
-  tcp::resolver::results_type::iterator it = endpoints.begin();
+  } else if (endpoint.protocol() == tcp::v6()) {
-  for (; it != endpoints.end(); ++it) {
+    ostream << ", v6";
-    std::cout << "  - " << it->endpoint();
-
-    if (it->endpoint().protocol() == tcp::v4()) {
-      std::cout << ", v4";
-    } else if (it->endpoint().protocol() == tcp::v6()) {
-      std::cout << ", v6";
-    }
-
-    std::cout << std::endl;
   }
 }
 
+void PrintEndpoints(std::ostream& ostream,
+                    const tcp::resolver::results_type& endpoints) {
+  ostream << "Endpoints: " << endpoints.size() << std::endl;
+  tcp::resolver::results_type::iterator it = endpoints.begin();
+  for (; it != endpoints.end(); ++it) {
+    ostream << "  - ";
+    PrintEndpoint(ostream, it->endpoint());
+    ostream << std::endl;
+  }
+}
+
+std::string EndpointToString(const boost::asio::ip::tcp::endpoint& endpoint) {
+  std::stringstream ss;
+  PrintEndpoint(ss, endpoint);
+  return ss.str();
+}
+
 }  // namespace webcc

src/webcc/utility.h

@@ -1,15 +1,22 @@
 #ifndef WEBCC_UTILITY_H_
 #define WEBCC_UTILITY_H_
 
+#include <iosfwd>
+#include <string>
+
 #include "boost/asio/ip/tcp.hpp"
 
 namespace webcc {
 
-// Print the resolved endpoints.
+void PrintEndpoint(std::ostream& ostream,
-// NOTE: Endpoint is one word, don't use "end point".
+                   const boost::asio::ip::tcp::endpoint& endpoint);
-void DumpEndpoints(
+
+void PrintEndpoints(
+    std::ostream& ostream,
     const boost::asio::ip::tcp::resolver::results_type& endpoints);
 
+std::string EndpointToString(const boost::asio::ip::tcp::endpoint& endpoint);
+
 }  // namespace webcc
 
 #endif  // WEBCC_UTILITY_H_