Slight cleanup and added convenience function to retrieve Request::content string.

http_examples.cpp

@@ -24,10 +24,12 @@ int main() {
     //Add resources using path-regex and method-string, and an anonymous function
     //POST-example for the path /string, responds the posted string
     server.resource["^/string$"]["POST"]=[](HttpServer::Response& response, shared_ptr<HttpServer::Request> request) {
-        //Retrieve string from istream (request->content)
-        stringstream ss;
-        ss << request->content.rdbuf();
-        string content=ss.str();
+        //Retrieve string:
+        auto content=request->content.string();
+        //request->content.string() is a convenience function for:
+        //stringstream ss;
+        //ss << request->content.rdbuf();
+        //string content=ss.str();
         
         response << "HTTP/1.1 200 OK\r\nContent-Length: " << content.length() << "\r\n\r\n" << content;
     };