使用Wininet如何使用外部API将图像文件上传到Web服务器C ++

Question

USES_CONVERSION;
INTERNET_DATA internetData;
DWORD  dwAccessType = 0;

dwAccessType |= INTERNET_OPEN_TYPE_PRECONFIG;
LPCSTR userName = "someusername";
LPCSTR password = "somepassword";

internetData.hOpen = InternetOpen(_T("agentname"),  
dwAccessType,                                                   
NULL,       
NULL,                                                           
0);

if (internetData.hOpen != NULL)
{
    internetData.hConnect = InternetConnectA(internetData.hOpen,    
    W2A(L"webserverIP"),                                    
    port,                                               
    userName,                                                       
    password,                                                       
    INTERNET_SERVICE_HTTP,                                      
    0,                                                          
    0);                                                     
    if (internetData.hConnect != NULL)
    {
     cout << "hconnect is not null" << "\n";
    }
}


internetData.hRequest = HttpOpenRequestA(internetData.hConnect,
W2A(L"POST"),                                   
"api/photo",                                                    
"HTTP/1.1",                                                     
NULL,                                                           
NULL,                                                           
NULL,                                                       
0);

HttpAddRequestHeadersA(internetData.hRequest, authInfo.c_str(), 
authInfo.size(), HTTP_ADDREQ_FLAG_COALESCE_WITH_COMMA);


CString upFile = "temp.jpg";
CString m_sBoundary = "---------------------------8d611c5f734a415";

LPCSTR    sHeader = "Content-Type: multipart/form-data; boundary=----------- 
----------------8d611c5f734a415\r\n";
HttpAddRequestHeadersA(internetData.hRequest,
    sHeader,
    lstrlenA(sHeader),
    HTTP_ADDREQ_FLAG_ADD);

LPCSTR extraHeaders = "Accept:application/json";
HttpAddRequestHeadersA(internetData.hRequest,
    extraHeaders,
    lstrlenA(extraHeaders),
    HTTP_ADDREQ_FLAG_ADD_IF_NEW);

LPCSTR    sTail = "\r\n---------------------------8d611c5f734a415\r\nContent-Disposition: form-data; name=\"image[file]\"; filename=\"2.jpg\"\r\nContent-Type: image/jpeg\r\n\r\n";

CString Tail = L"--";
Tail += m_sBoundary;
Tail += L"--\r\n";

HANDLE hFile = CreateFile(L"E:\\temp.jpg", GENERIC_READ, FILE_SHARE_READ,
    NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);

if (hFile == INVALID_HANDLE_VALUE)
{
    cout << "Invalid File Handle\n";
}

INTERNET_BUFFERS BufferIn = { 0 };
BufferIn.dwStructSize = sizeof(INTERNET_BUFFERS);
BufferIn.dwBufferTotal = lstrlenA(sTail) + GetFileSize(hFile, NULL) + Tail.GetLength();

cout << BufferIn.dwBufferTotal << "\n";

if (!HttpSendRequestEx(internetData.hRequest, &BufferIn,NULL, HSR_INITIATE, 0))
{
    printf("Error on HttpSendRequestEx %d\n", GetLastError());
    cout << "request ex failed\n";
}

DWORD sum = 0;
unsigned long ulWrote = 0;
BOOL bWrote = false;

//stream header
bWrote = InternetWriteFile(internetData.hRequest, (const void*)sTail, lstrlenA(sTail), &ulWrote);
sum += ulWrote;
if (!bWrote)
{
    cout << "Stream Header Failed\n";
}

DWORD dwBytesRead;
BYTE pBuffer[1024]; // Read from file in 1K chunks
BOOL bRead;             // stream binary file
do
{
    if (!(bRead = ReadFile(hFile, pBuffer, sizeof(pBuffer),&dwBytesRead, NULL)))
    {
        cout << "Faile read failed\n";
    }
    if (!(bRead = InternetWriteFile(internetData.hRequest, pBuffer, dwBytesRead, &ulWrote)))
    {
        cout << "Stream write failed\n";
    }
    sum += ulWrote;
} while (dwBytesRead == sizeof(pBuffer));




bWrote = InternetWriteFile(internetData.hRequest, (const void*)Tail, Tail.GetAllocLength(), &ulWrote);
sum += ulWrote;
if (!bWrote)
{
    cout << "Taile failed\n";
}

CloseHandle(hFile);

cout << sum << "\n";

if (!HttpEndRequest(internetData.hRequest, NULL, HSR_INITIATE, 0))
{
    if (!HttpEndRequest(internetData.hRequest, NULL, 0, 0))
    {
        cout << GetLastError() << "\n";     
    }
}


DWORD nRead = 0L;
char inbuf[1024];
do 
{
    nRead = 0L;
    bRead = InternetReadFile(internetData.hRequest, inbuf, 1023, &nRead);

    if (nRead > 0) 
    {
        inbuf[nRead] = '\0';


        CString aText = inbuf;
        cout << inbuf << "\n";
    }
} while (bRead == TRUE && nRead > 0);

程序已成功编译。从服务器端运行时，我收到错误的请求错误。

在服务器端，image [file]属性中未收到文件。此代码有什么问题？代码是否有错误？我正在努力争取两天的问题...任何人都可以帮助获得想法。