Created
August 19, 2014 03:17
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C++ Webserver using libmicrohttpd. A simple wrapper for libmicrohttpd to create websites using C++.
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| #ifndef _CONTROLLER_ | |
| #define _CONTROLLER_ | |
| #include <sstream> | |
| /** | |
| * Base controller for handling http requests. | |
| */ | |
| class Controller{ | |
| public: | |
| /** | |
| * Check if given path and method are handled by this controller. | |
| */ | |
| virtual bool validPath(const char* path, const char* method) = 0; | |
| /** | |
| * Handles given request. | |
| */ | |
| virtual int handleRequest(struct MHD_Connection* connection, | |
| const char* url, const char* method, const char* upload_data, | |
| size_t* upload_data_size) = 0; | |
| }; | |
| /** | |
| * The dynamic controller is a controller for creating user defined pages. | |
| */ | |
| class DynamicController:public Controller{ | |
| public: | |
| virtual bool validPath(const char* path, const char* method) = 0; | |
| /** | |
| * User defined http response. | |
| */ | |
| virtual void createResponse(struct MHD_Connection* connection, | |
| const char* url, const char* method, const char* upload_data, | |
| size_t* upload_data_size, std::stringstream& response) = 0; | |
| virtual int handleRequest(struct MHD_Connection* connection, | |
| const char* url, const char* method, const char* upload_data, | |
| size_t* upload_data_size){ | |
| std::stringstream response_string; | |
| createResponse(connection, url, method, upload_data, upload_data_size, response_string); | |
| //Send response. | |
| struct MHD_Response * response = MHD_create_response_from_buffer(strlen(response_string.str().c_str()), | |
| (void*)response_string.str().c_str(), MHD_RESPMEM_MUST_COPY); | |
| int ret = MHD_queue_response(connection, MHD_HTTP_OK, response); | |
| MHD_destroy_response(response); | |
| return ret; | |
| } | |
| }; | |
| #endif |
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| #include "WebServer.hpp" | |
| #include <time.h> | |
| class MyController:public DynamicController{ | |
| public: | |
| virtual bool validPath(const char* path, const char* method){ | |
| if(strcmp(path, "/") == 0 && strcmp("GET", method) == 0){ | |
| return true; | |
| } | |
| return false; | |
| } | |
| virtual void createResponse(struct MHD_Connection * connection, | |
| const char * url, const char * method, const char * upload_data, | |
| size_t * upload_data_size, std::stringstream& response){ | |
| time_t time_cur; | |
| time(&time_cur); | |
| struct tm* time_now = localtime(&time_cur); | |
| response << "<html><head><title>Hello World from cpp</title></head><body>Hello World at " | |
| << time_now->tm_hour << ":" << time_now->tm_min << ":" << time_now->tm_sec << "!</body></html>"; | |
| } | |
| }; | |
| int main(int argc, char** argv){ | |
| MyController myPage; | |
| WebServer server(8080); | |
| server.addController(&myPage); | |
| server.start(); | |
| } | |
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| #include "WebServer.hpp" | |
| #include "Controller.hpp" | |
| int WebServer::request_handler(void* cls, struct MHD_Connection* connection, | |
| const char* url, const char* method, const char* version, | |
| const char* upload_data, size_t* upload_data_size, void** ptr) { | |
| std::cout << "Request: " << url << ", Method: " << method << std::endl; | |
| WebServer* server = (WebServer*)cls; | |
| Controller* controller = 0; | |
| for(int i = 0; i < server->controllers.size(); i++){ | |
| Controller* c = server->controllers.at(i); | |
| if(c->validPath(url, method)){ | |
| controller = c; | |
| break; | |
| } | |
| } | |
| if(!controller){ | |
| std::cout << "Path not found.\n"; | |
| struct MHD_Response* response = MHD_create_response_from_buffer(0, 0, MHD_RESPMEM_PERSISTENT); | |
| return MHD_queue_response (connection, MHD_HTTP_NOT_FOUND, response); | |
| } | |
| return controller->handleRequest(connection, url, method, upload_data, upload_data_size); | |
| } | |
| WebServer::WebServer(int p){ | |
| port = p; | |
| daemon = 0; | |
| } | |
| void WebServer::addController(Controller* controller){ | |
| controllers.push_back(controller); | |
| } | |
| int WebServer::start(){ | |
| daemon = MHD_start_daemon(MHD_USE_THREAD_PER_CONNECTION, | |
| 8080, NULL, NULL, &request_handler, this, MHD_OPTION_END); | |
| if(!daemon) | |
| return 1; | |
| while(1){ | |
| sleep(10000); | |
| } | |
| MHD_stop_daemon(daemon); | |
| return 0; | |
| } |
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| #ifndef _WEBSERVER_ | |
| #define _WEBSERVER_ | |
| #include <microhttpd.h> | |
| #include <iostream> | |
| #include <string.h> | |
| #include <vector> | |
| #include "Controller.hpp" | |
| class WebServer{ | |
| private: | |
| int port; | |
| struct MHD_Daemon* daemon; | |
| /** List of controllers this server has. */ | |
| std::vector<Controller*> controllers; | |
| static int request_handler(void * cls, struct MHD_Connection * connection, | |
| const char * url, const char * method, const char * version, | |
| const char * upload_data, size_t * upload_data_size, void ** ptr); | |
| public: | |
| WebServer(int p); | |
| void addController(Controller* controller); | |
| int start(); | |
| }; | |
| #endif |
When I try to send a post request the upload_data comes empty. (upload_data_size = 0)
Could you please help me why is this happening? This is quite urgent request.
Thanks so much.
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Very useful, Thanks!