hello all

i'm using cUrl and mysql in PHP but new to c++

for connecting to remote mysql database and run query what i need?
should i install mysql connector? where are mysql libraries?

may i download a large file for example 400 mb in c++ using cUrl ?

i found these example codes :

/*****************************************************************************
 *                                  _   _ ____  _
 *  Project                     ___| | | |  _ \| |
 *                             / __| | | | |_) | |
 *                            | (__| |_| |  _ <| |___
 *                             \___|\___/|_| \_\_____|
 *
 */ 
 
#include <stdio.h>
 
#include <curl/curl.h>
#include <curl/types.h>
#include <curl/easy.h>
 
/*
 * This is an example showing how to get a single file from an FTP server.
 * It delays the actual destination file creation until the first write
 * callback so that it won't create an empty file in case the remote file
 * doesn't exist or something else fails.
 */ 
 
struct FtpFile {
  const char *filename;
  FILE *stream;
};
 
static size_t my_fwrite(void *buffer, size_t size, size_t nmemb, void *stream)
{
  struct FtpFile *out=(struct FtpFile *)stream;
  if(out && !out->stream) {
    /* open file for writing */ 
    out->stream=fopen(out->filename, "wb");
    if(!out->stream)
      return -1; /* failure, can't open file to write */ 
  }
  return fwrite(buffer, size, nmemb, out->stream);
}
 
 
int main(void)
{
  CURL *curl;
  CURLcode res;
  struct FtpFile ftpfile={
    "curl.tar.gz", /* name to store the file as if succesful */ 
    NULL
  };
 
  curl_global_init(CURL_GLOBAL_DEFAULT);
 
  curl = curl_easy_init();
  if(curl) {
    /*
     * Get curl 7.9.2 from sunet.se's FTP site. curl 7.9.2 is most likely not
     * present there by the time you read this, so you'd better replace the
     * URL with one that works!
     */ 
    curl_easy_setopt(curl, CURLOPT_URL,
                     "ftp://ftp.sunet.se/pub/www/utilities/curl/curl-7.9.2.tar.gz");
    /* Define our callback to get called when there's data to be written */ 
    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, my_fwrite);
    /* Set a pointer to our struct to pass to the callback */ 
    curl_easy_setopt(curl, CURLOPT_WRITEDATA, &ftpfile);
 
    /* Switch on full protocol/debug output */ 
    curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
 
    res = curl_easy_perform(curl);
 
    /* always cleanup */ 
    curl_easy_cleanup(curl);
 
    if(CURLE_OK != res) {
      /* we failed */ 
      fprintf(stderr, "curl told us %d\n", res);
    }
  }
 
  if(ftpfile.stream)
    fclose(ftpfile.stream); /* close the local file */ 
 
  curl_global_cleanup();
 
  return 0;
}
#include <mysql++.h>
#include <stdlib.h>
 
using namespace std;
using namespace mysqlpp;
 
int main() {
    try {
        Connection conn(false);
        conn.connect("DB NAME", "DB HOST probably localhost", "DB USER", "DB PASS");
        Query query = conn.query();
    } catch (BadQuery er) { // handle any connection or
        // query errors that may come up
        cerr << "Error: " << er.what() << endl;
        return -1;
    } catch (const BadConversion& er) {
        // Handle bad conversions
        cerr << "Conversion error: " << er.what() << endl <<
                "\tretrieved data size: " << er.retrieved <<
                ", actual size: " << er.actual_size << endl;
        return -1;
    } catch (const Exception& er) {
        // Catch-all for any other MySQL++ exceptions
        cerr << "Error: " << er.what() << endl;
        return -1;
    }
 
    return (EXIT_SUCCESS);
}

in curl example , how to use it? which function to declare? where to enter url?
how to get download progress and show it?

please help

when retrieving a file with cUrl , how to show progress?

thanks

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