用C++上传图像文件

我是C++环境的新手。我尝试用C++将一个图像文件上传到PHP服务器。但它不会发送完整的文件。只有我上传的图像文件大小是1 KB。

我得到了一个非常像我的职位。但我不知道如何将图像二进制转换为base64字符串。我尝试了另一种解决方案memcpy，它也不起作用。

通过POST 上传文件

我的C++代码：

#define _CRT_SECURE_NO_DEPRECATE
#include <iostream>
#include <tchar.h>
#include <Urlmon.h>
#pragma comment (lib, "Urlmon.lib")
#include <windows.h>
#include <wininet.h>
#include <iostream>
#include <tchar.h>
#include <stdio.h>
#pragma comment(lib,"wininet.lib")
#define ERROR_OPEN_FILE       10
#define ERROR_MEMORY          11
#define ERROR_SIZE            12
#define ERROR_INTERNET_OPEN   13
#define ERROR_INTERNET_CONN   14
#define ERROR_INTERNET_REQ    15
#define ERROR_INTERNET_SEND   16
using namespace cv;
using namespace std;
int main()
{
    // Local variables
    static char *filename = "test.jpg";   //Filename to be loaded
    static char *filepath = "test.jpg";   //Filename to be loaded
    static char *type = "text/jpeg";
    static TCHAR hdrs[] = "Content-Type: multipart/form-data; boundary=---------------------------7d82751e2bc0858";
    static char boundary[] = "-----------------------------7d82751e2bc0858";            //Header boundary
    static char nameForm[] = "uploadedfile";     //Input form name
    static char iaddr[] = "server";        //IP address
    static char url[] = "uploader.php";
    char * buffer;                   //Buffer containing file + headers
    char * content;                  //Buffer containing file
    FILE * pFile;                    //File pointer
    long lSize;                      //File size
    size_t result;
    char *pos; // used in the loop
    // Open file
    pFile = fopen(filepath, "rb");
    if (pFile == NULL)
    {
        printf("ERROR_OPEN_FILE");
        getchar();
        return ERROR_OPEN_FILE;
    }
    printf("OPEN_FILEn");
    // obtain file size:
    fseek(pFile, 0, SEEK_END);
    lSize = ftell(pFile);
    rewind(pFile);
    // allocate memory to contain the whole file:
    content = (char*)malloc(sizeof(char)*lSize);
    if (content == NULL)
    {
        printf("ERROR_MEMORY");
        getchar();
        return ERROR_OPEN_FILE;
    }
    printf("MEMORY_ALLOCATEDt "%d" n", lSize);
    // copy the file into the buffer:
    result = fread(content, 1, lSize, pFile);
    rewind (pFile);
    if (result != lSize)
    {
        printf("ERROR_SIZE");
        getchar();
        return ERROR_OPEN_FILE;
    }
    printf("SIZE_OKn");
    // terminate
    fclose(pFile);
    printf("FILE_CLOSEn");
    //allocate memory to contain the whole file + HEADER
    buffer = (char*)malloc(sizeof(char)*lSize + 2048);
    //print header
    sprintf(buffer, "%srnContent-Disposition: form-data; name="%s"; filename="%s"rn", boundary, nameForm, filename);
    sprintf(buffer, "%sContent-Type: %srn", buffer, type);
    //sprintf(buffer, "%sContent-Length: %drn", buffer, lSize);
    sprintf(buffer, "%srn%srn", buffer, content);
    /**
    sprintf(buffer, "%srn", buffer);
    memcpy(buffer + strlen(buffer),content,lSize);
    sprintf(buffer, "%srn", buffer);
    */
    sprintf(buffer, "%s%s--rn", buffer, boundary);
    //Open internet connection
    HINTERNET hSession = InternetOpen("WINDOWS", INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0);
    if (hSession == NULL)
    {
        printf("ERROR_INTERNET_OPEN");
        getchar();
        return ERROR_OPEN_FILE;
    }
    printf("INTERNET_OPENEDn");
    HINTERNET hConnect = InternetConnect(hSession, iaddr, INTERNET_DEFAULT_HTTP_PORT, NULL, NULL, INTERNET_SERVICE_HTTP, 0, 1);
    if (hConnect == NULL)
    {
        printf("ERROR_INTERNET_CONN");
        getchar();
        return ERROR_INTERNET_CONN;
    }
    printf("INTERNET_CONNECTEDn");
    HINTERNET hRequest = HttpOpenRequest(hConnect, (const char*)"POST", _T(url), NULL, NULL, NULL, INTERNET_FLAG_RELOAD, 1);
    if (hRequest == NULL)
    {
        printf("ERROR_INTERNET_REQ");
        getchar();
    }
    printf("INTERNET_REQ_OPENn");
    BOOL sent = HttpSendRequest(hRequest, hdrs, strlen(hdrs), buffer, strlen(buffer));
    if (!sent)
    {
        printf("ERROR_INTERNET_SEND");
        getchar();
        return ERROR_INTERNET_CONN;
    }
    printf("INTERNET_SEND_OKn");
    printf("rn%srn",buffer);
    //close any valid internet-handles
    InternetCloseHandle(hSession);
    InternetCloseHandle(hConnect);
    InternetCloseHandle(hRequest);
}

输出：

OPEN_FILE
MEMORY_ALLOCATED     "44358" 
SIZE_OK
FILE_CLOSE
INTERNET_OPENED
INTERNET_CONNECTED
INTERNET_REQ_OPEN
INTERNET_SEND_OK

-----------------------------7d82751e2bc0858
Content-Disposition: form-data; name="uploadedfile"; filename="test.jpg"
Content-Type: text/jpeg

ÿØÿà
-----------------------------7d82751e2bc0858--

感谢