[Socket] Envoi d'image par requête http post

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "windows.h"

int main()
{
    char *buffer;
    char requete[1500];
    int lSize = 0;
    size_t result = 0;
    WSADATA WSAData;
    int erreur = WSAStartup(MAKEWORD(2,2), &WSAData);

    SOCKET sock;
    SOCKADDR_IN sin;
    FILE* image = fopen("C:\\Users\\Dardanboy\\Pictures\\w.png", "rb");
    if (image == NULL){printf("Erreur !\n"); system("PAUSE"); return 0;}

    fseek (image , 0 , SEEK_END);
    lSize = ftell (image);
    rewind (image);

    // allocate memory to contain the whole file:
    buffer = (char*) malloc (sizeof(char)*lSize);
    if (buffer == NULL) {fputs ("Memory error",stderr); exit (2);}

    // copy the file into the buffer:
    result = fread (buffer,1,lSize,image);
    if (result != lSize)
    {
        printf("lSize (taille image) = %d, result = %d, buffer = %02x\n", lSize, result, buffer);
        fputs ("Reading error",stderr); exit (3);
    }

    printf("lSize (taille image) = %d, result = %d, buffer = %x\n", lSize, result, buffer);

    sprintf(requete, "POST /upload/cible_envoi.php HTTP/1.1\r\n"
                     "Accept: text/html, application/xhtml+xml, */*\r\n"
                     "Referer: http://dardanboy.franceserv.com/upload/upload.php\r\n"
                     "Accept-Language: fr-CH\r\n"
                     "User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)\r\n"
                     "Content-Type: multipart/form-data; boundary=---------------------------7db2c7420378\r\n"
                     "Accept-Encoding: gzip, deflate\r\n"
                     "Host: dardanboy.franceserv.com\r\n"
                     "Content-Length: 292\r\n"
                     "Connection: Keep-Alive\r\n"
                     "Cache-Control: no-cache\r\n\r\n"
                     "-----------------------------7db2c7420378\r\n"
                     "Content-Disposition: form-data; name=\"monfichier\"; filename=\"w.png\"\r\n"
                     "Content-Type: image/x-png\r\n\r\n"
                     "%s\r\n"
                     "-----------------------------7db2c7420378--\r\n\r\n"
                     "\r\n", buffer);
               
    sock = socket(AF_INET, SOCK_STREAM, 0);
    /* Configuration de la connexion */
    sin.sin_addr.s_addr = inet_addr("178.33.214.192"); // ip de l'hébergeur
    sin.sin_family = AF_INET;
    sin.sin_port = htons(80);

    if(!erreur)
    {
        /* connexion grâce à connect */
            if(connect(sock, (SOCKADDR*)&sin, sizeof(sin)) != SOCKET_ERROR)
            {
                printf("Connexion à %s sur le port %d\n", inet_ntoa(sin.sin_addr), htons(sin.sin_port));
                printf("strlen(requete) = %d sizeof(requete) = %d\n", strlen(requete), sizeof(requete));
                printf("\n\nrequete = %s\n\n", requete);
                send(sock, requete, strlen(requete), 0);

                    /* On ferme la connexion */
                    fclose (image);
                    free (buffer);
                    closesocket(sock);
                    WSACleanup();
                    return 1;
            }

             else{
                fclose (image);
                free (buffer);
                closesocket(sock);
                WSACleanup();
                printf("ERREUR: Impossible de se connecter à %s sur le port %d !", inet_ntoa(sin.sin_addr), htons(sin.sin_port));
                system("PAUSE");
                return 0;
            }

    }
    else{
        printf("ERREUR !\n");
        system("PAUSE");
        return 0;
    }

        return 0;
}

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "windows.h"

int main()
{
    char *buffer;
    char reception[10000], requete[2000];
    int lSize = 0;
    size_t result = 0;
    WSADATA WSAData;
    int erreur = WSAStartup(MAKEWORD(2,2), &WSAData);

    SOCKET sock;
    SOCKADDR_IN sin;
    FILE* image = fopen("C:\\Users\\albatron\\Pictures\\w.png", "rb");
    if (image == NULL){printf("Erreur !\n"); system("PAUSE"); return 0;}

    fseek (image , 0 , SEEK_END);
    lSize = ftell (image);
    rewind (image);

    // allocate memory to contain the whole file:
    buffer = (char*) malloc (sizeof(char)*lSize);
    if (buffer == NULL) {fputs ("Memory error",stderr); exit (2);}

    // copy the file into the buffer:
    result = fread (buffer,1,lSize,image);
    if (result != lSize)
    {
        fputs ("Reading error",stderr); exit (3);
    }
    printf("lSize (taille image) = %d, result = %d\n", lSize, result);

                        strncat(requete, "POST /upload/cible_envoi.php HTTP/1.1\r\n"
                                         "Accept: text/html, application/xhtml+xml, */*\r\n"
                                         "Referer: http://dardanboy.franceserv.com/upload/upload.php\r\n"
                                         "Accept-Language: fr-CH\r\n"
                                         "User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)\r\n"
                                         "Content-Type: multipart/form-data; boundary=---------------------------7db2c7420378\r\n"
                                         "Accept-Encoding: gzip, deflate\r\n"
                                         "Host: dardanboy.franceserv.com\r\n"
                                         "Content-Length: 292\r\n"
                                         "Connection: Keep-Alive\r\n"
                                         "Cache-Control: no-cache\r\n\r\n"
                                         "-----------------------------7db2c7420378\r\n"
                                         "Content-Disposition: form-data; name=\"monfichier\"; filename=\"w.png\"\r\n"
                                         "Content-Type: image/x-png\r\n\r\n", 10000);
                        memcpy(requete, buffer, sizeof(buffer)+1);
                        strncat(requete, "\r\n"
                                         "-----------------------------7db2c7420378--\r\n\r\n"
                                         "\r\n", 10000);
    sock = socket(AF_INET, SOCK_STREAM, 0);
    /* Configuration de la connexion */
    sin.sin_addr.s_addr = inet_addr("178.33.214.192");// 62.50.35.202
    sin.sin_family = AF_INET;
    sin.sin_port = htons(80);

    if(!erreur)
    {
        /* connexion grâce à connect */
            if(connect(sock, (SOCKADDR*)&sin, sizeof(sin)) != SOCKET_ERROR)
            {
                printf("Connexion à %s sur le port %d\n", inet_ntoa(sin.sin_addr), htons(sin.sin_port));
                printf("strlen(requete) = %d sizeof(requete) = %d\n", strlen(requete), sizeof(requete));
                printf("\n\nrequete = %s\n\n", requete);
                if(send(sock, requete, sizeof(requete), 0) != SOCKET_ERROR){}
                else{printf("Erreur avec send !\n"); system("PAUSE"); return 0;}

                    /* On récupère la réponse du serveur et on la met dans buffer*/
                    //recv(sock, buffer, sizeof(buffer), 0);
                    if(recv(sock, buffer, sizeof(buffer)+1, 0)!= SOCKET_ERROR){}
                    else{printf("Erreur avec recv !\n"); system("PAUSE"); return 0;}
                    printf("\nreception = %s", reception);
                    
                    /* On ferme la connexion */
                    fclose (image);
                    free (buffer);
                    closesocket(sock);
                    WSACleanup();
                    return 1;
            }

             else{
                fclose (image);
                free (buffer);
                closesocket(sock);
                WSACleanup();
                printf("ERREUR: Impossible de se connecter à %s sur le port %d !", inet_ntoa(sin.sin_addr), htons(sin.sin_port));
                system("PAUSE");
                return 0;
            }

            /* send permet d'envoyer une requête à l'adresse scok. Dans ce cas, au site www.habbo.fr
            la requête est de type http:
            "GET /groups/jeux_sponso HTTP/1.0\r\n"
            "Host: www.habbo.fr\r\n"
            "\r\n"; */

    }
    else{
        printf("ERREUR !\n");
        system("PAUSE");
        return 0;
    }

        return 0;
}

buffer = (char*) malloc (sizeof(char)*lSize);
//devient
buffer = (char*) malloc (lSize+1); //sizeof(char) ça ne change jamais