Piso - Upload files

====== Introduzione a Crow a "A Fast and Easy to use microframework for the web." ====== Autore: **//Fabio Di Matteo//** \\ Ultima revisione: **// 21/01/2024 - 22:03 //** // // Il seguente codice c++ imposta delle rotte che mostrano alcune caratteristiche del framework.


#include "crow.h"
#include "crow/middlewares/cookie_parser.h"
//#include "crow_all.h"

int main()
{
     //crow::SimpleApp app;
     crow::App app;


    //define your endpoint at the root directory
    CROW_ROUTE(app, "/")([](){
        auto page = crow::mustache::load_text("index.html");
        return page;
    });
    
    
    CROW_ROUTE(app, "/ciao")([](){
        auto t = crow::mustache::load_text("ciao.html");
		const char* myname="Fabio Di Matteo";
		
		auto page = crow::mustache::compile(t);
		crow::mustache::context ctx;
		ctx["name"] = myname;
		return page.render(ctx);
    });
    
    // localhost:8080/req?p=
    CROW_ROUTE(app, "/req")([](const crow::request& req){
        const char *page=req.url_params.get("p");
        return page;
    });
    
    CROW_ROUTE(app, "/cookies")([&app](const crow::request& req)
    {
        auto& ctx = app.get_context(req);
		std::string value = ctx.get_cookie("biscotto");
		std::string page;
		if (value.empty())
		{
			ctx.set_cookie("biscotto", "cioccolato");
			page="Nessun cookie impostato.";
        }else{
			page="Biscotto al gusto di : "+value;
        }
        return page;
    });
    
    // download file (esempio: /download?f=my file.png)
    CROW_ROUTE(app, "/download")([](const crow::request& req,crow::response& res){
		 const char *f=req.url_params.get("f");
		res.set_static_file_info(f);
                //res.set_header("Content-Disposition","filename=\"miofile.txt\"");
		res.end();
    });

    //set the port, set the app to run on multiple threads, and run the app
    app.port(8080).multithreaded().run();
}

**makefile** all: g++ main.cc -o server ===== Upload di un file ===== Salvataggio di un file inviato attraverso un form multipart.


...
CROW_ROUTE(app, "/save").methods(crow::HTTPMethod::POST)([=](const crow::request& req ){
		std::string root_folder="/home/fabio/progetto"; 
		crow::multipart::message msg(req);
        crow::multipart::header myheader = msg.parts[0].get_header_object("Content-Disposition");
        //std::string myheader_value=myheader.value;
		std::string  outfile_name=myheader.params["filename"];
		CROW_LOG_ERROR << "File Name ->"+outfile_name;
        
        std::ofstream out_file(root_folder+"/"+outfile_name);
         if (!out_file)
		  {
			  CROW_LOG_ERROR << " Write to file failed\n";
			  return "Write to file failed!";
		  }
                  out_file << msg.parts[0].body;
                  out_file.close();
        
        return "ok";
		 
		 
	
	});



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Piso - Upload files\
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Upload a file
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