Forbit to create http async clients on stack since they are derived from std::shared_from_this.

example/github_rest_client/main.cc

@@ -2,22 +2,21 @@
 
 #include "json/json.h"
 
-#include "webcc/rest_ssl_client.h"
 #include "webcc/logger.h"
+#include "webcc/rest_ssl_client.h"
 
 const bool kSslVerify = false;
 
 #define PRINT_CONTENT 0
 
-
 static Json::Value StringToJson(const std::string& str) {
   Json::Value json;
 
   Json::CharReaderBuilder builder;
   std::stringstream stream(str);
-  std::string errs;
-  if (!Json::parseFromStream(builder, stream, &json, &errs)) {
-    std::cerr << errs << std::endl;
+  std::string errors;
+  if (!Json::parseFromStream(builder, stream, &json, &errors)) {
+    std::cerr << errors << std::endl;
   }
 
   return json;

example/http_async_client/main.cc

@@ -9,12 +9,10 @@
 //   Only HttpBin.org has this issue.
 
 static void Test(boost::asio::io_context& io_context) {
-  auto request = webcc::HttpRequest::Make(webcc::kHttpGet, "/get",
-                                          "httpbin.org");
+  auto request = webcc::HttpRequest::New(webcc::kHttpGet, "/get",
+                                         "httpbin.org");
 
-  webcc::HttpAsyncClientPtr client{
-    new webcc::HttpAsyncClient(io_context)
-  };
+  auto client = webcc::HttpAsyncClient::New(io_context);
 
   client->SetTimeout(3);
 

example/http_client/main.cc

@@ -14,8 +14,8 @@ static void PrintError(const webcc::HttpClient& client) {
 int main() {
   WEBCC_LOG_INIT("", webcc::LOG_CONSOLE);
 
-  auto request = webcc::HttpRequest::Make(webcc::kHttpGet, "/get",
-                                          "httpbin.org");
+  auto request = webcc::HttpRequest::New(webcc::kHttpGet, "/get",
+                                         "httpbin.org");
 
   webcc::HttpClient client;
 

example/http_ssl_async_client/main.cc

@@ -26,15 +26,13 @@ int main(int argc, char* argv[]) {
   boost::asio::io_context io_context;
 
   // Leave port to default value.
-  auto request = webcc::HttpRequest::Make(webcc::kHttpGet, url, host);
+  auto request = webcc::HttpRequest::New(webcc::kHttpGet, url, host);
 
   // Verify the certificate of the peer or not.
   // See HttpSslClient::Request() for more details.
   bool ssl_verify = false;
 
-  webcc::HttpSslAsyncClientPtr client{
-    new webcc::HttpSslAsyncClient{ io_context, 2000, ssl_verify }
-  };
+  auto client = webcc::HttpSslAsyncClient::New(io_context, 2000, ssl_verify);
 
   // Response callback.
   auto callback = [](webcc::HttpResponsePtr response, webcc::Error error,