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3rd_party/libhttpserver-0.18.2/examples/hello_world.cpp

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+/*
+     This file is part of libhttpserver
+     Copyright (C) 2011, 2012, 2013, 2014, 2015 Sebastiano Merlino
+
+     This library is free software; you can redistribute it and/or
+     modify it under the terms of the GNU Lesser General Public
+     License as published by the Free Software Foundation; either
+     version 2.1 of the License, or (at your option) any later version.
+
+     This library is distributed in the hope that it will be useful,
+     but WITHOUT ANY WARRANTY; without even the implied warranty of
+     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+     Lesser General Public License for more details.
+
+     You should have received a copy of the GNU Lesser General Public
+     License along with this library; if not, write to the Free Software
+     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+     USA
+*/
+
+#include <iostream>
+
+#include <httpserver.hpp>
+
+using namespace httpserver;
+
+class hello_world_resource : public http_resource {
+	public:
+        const std::shared_ptr<http_response> render(const http_request&);
+        void set_some_data(const std::string &s) {data = s;}
+        std::string data;
+};
+
+//using the render method you are able to catch each type of request you receive
+const std::shared_ptr<http_response> hello_world_resource::render(const http_request& req)
+{
+    //it is possible to store data inside the resource object that can be altered
+    //through the requests
+    std::cout << "Data was: " << data << std::endl;
+    std::string datapar = req.get_arg("data");
+    set_some_data(datapar == "" ? "no data passed!!!" : datapar);
+    std::cout << "Now data is:" << data << std::endl;
+
+    //it is possible to send a response initializing an http_string_response
+    //that reads the content to send in response from a string.
+    return std::shared_ptr<http_response>(new string_response("Hello World!!!", 200));
+}
+
+int main()
+{
+    //it is possible to create a webserver passing a great number of parameters.
+    //In this case we are just passing the port and the number of thread running.
+    webserver ws = create_webserver(8080).start_method(http::http_utils::INTERNAL_SELECT).max_threads(5);
+
+    hello_world_resource hwr;
+    //this way we are registering the hello_world_resource to answer for the endpoint
+    //"/hello". The requested method is called (if the request is a GET we call the render_GET
+    //method. In case that the specific render method is not implemented, the generic "render"
+    //method is called.
+    ws.register_resource("/hello", &hwr, true);
+
+    //This way we are putting the created webserver in listen. We pass true in order to have
+    //a blocking call; if we want the call to be non-blocking we can just pass false to the
+    //method.
+    ws.start(true);
+    return 0;
+}