C/CPP/C++ cURL Download File

cppcURLdownload.cpp

// 14:20 28/09/2022
// Adapted from https://curl.haxx.se/libcurl/c/https.html
// Source https://www.devdungeon.com/content/curl-tutorial, https://stackoverflow.com/questions/4984391/cmd-line-rename-file-with-date-and-time
// disable : 4996 https://learn.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-3-c4996?f1url=%3FappId%3DDev16IDEF1%26l%3DEN-US%26k%3Dk(C4996)%26rd%3Dtrue&view=msvc-170

#include <iostream>
#include <fstream>
#include <sstream>
#include <string>
#include <curl.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <sys/types.h>
#pragma warning(disable : 4996)

size_t write_data(void* ptr, size_t size, size_t nmemb, FILE* stream) {
    size_t written = fwrite(ptr, size, nmemb, stream);
    return written;
}

int dirExists(const char* path)
{
    struct stat info;
    if (stat(path, &info) != 0)
        return 0;
    else if (info.st_mode & S_IFDIR)
        return 1;
    else
        return 0;
}

int main(void)
{
    CURL* curl;
    CURLcode result;
    FILE* fp;
    //char* url = "http://www.hanyajasa.com/";

    curl_global_init(CURL_GLOBAL_DEFAULT);

    const char* path = "report";
    const char* pathreportc = "C:\\simrs\\report";

    std::ifstream inFile;
    inFile.open("server.bkb"); //open the input file: http://192.168.88.100/report1.zip
    std::stringstream strStream;
    strStream << inFile.rdbuf(); //read the file
    std::string strserver = strStream.str(); //str holds the content of the file
    std::cout << strserver << "\n"; //you can do anything with the string!!!
    std::cout << " " << std::endl;

    printf("%d\n", dirExists(path));
    if ("%d\n", dirExists(path) == 1) {
        std::cout << "Folder report sudah ada, tak perlu download ulang ke server." << std::endl;
        if ("%d\n", dirExists(pathreportc) == 1) {
            std::cout << "Rename C_simrs_report." << std::endl;
            system("move C:\\simrs\\report  C:\\simrs\\report_%time:~0,2%%time:~3,2%-%DATE:/=%");
        }
        system("IF exist C:\\simrs\\report\\ (echo Direktori report sudah ada di C, rename dulu.) ELSE IF exist report (move report C:\\simrs\\report && echo Menyesuaikan report sesuai keperluan.)");
        std::cout << "Selesai...." << std::endl;
        system("pause");
        exit(0);
    }

    system("IF exist C:\\simrs\\ (echo Direktori SIMRS sudah ada di C.) ELSE (mkdir C:\\simrs\\ && echo Direktori SIMRS belum ada maka akan dibuatkan di C.)");
    //system("IF exist C:\\simrs\\report\\ (echo Direktori report sudah ada di C, rename dulu.) ELSE IF exist report (move report C:\\simrs\\report && echo Menyesuaikan report sesuai keperluan.)");
    std::cout << "Bismillah, mulai download report...." << std::endl;
    //system("echo Bismillah, mulai download report....");

    curl = curl_easy_init();
    //char outfilename[FILENAME_MAX] = "C:\\simrs\\report.zip";
    char outfilename[FILENAME_MAX] = "report.zip";


    if (curl) {
        fp = fopen(outfilename, "wb");
        // Set URL
        //curl_easy_setopt(curl, CURLOPT_URL, "http://192.168.88.100/report1.zip");
        //curl_easy_setopt(curl, CURLOPT_URL, str + "/report1.zip");
        curl_easy_setopt(curl, CURLOPT_URL, strserver);
        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
        curl_easy_setopt(curl, CURLOPT_WRITEDATA, fp);

        // If you want to set any more options, do it here, before making the request.
        // Perform the request which prints to stdout
        result = curl_easy_perform(curl);

        // Error check
        if (result != CURLE_OK) {
            std::cerr << "Error during curl request: "
                << curl_easy_strerror(result) << std::endl;
        }

        curl_easy_cleanup(curl);
        fclose(fp);
        std::cout << "Selesai mendownload report.zip, silakan extract dulu, lalu jalankan kembali program ini." << std::endl;
    }
    else {
        std::cerr << "Error initializing curl." << std::endl;
    }

    curl_global_cleanup();
    system("pause");
    return 0;
}