HttpSendRequest 返回为什么是0 ？

[麦壳饼]

int   UploadFile(char * filename)
{

	const char *type = "text/jpeg";
	TCHAR hdrs[] = L"Content-Type: multipart/form-data; boundary=---------------------------7d82751e2bc0858";
	char boundary[] = "-----------------------------7d82751e2bc0858";            //Header boundary
	char nameForm[] = "file";     //Input form name
	wchar_t iaddr[] = L"198.216.3.173";        //IP address
	char url[] = "/api/Prober/UploadFile";
	int port = 9090;
	char * buffer;                   //Buffer containing file + headers
	char * content;                  //Buffer containing file
	FILE * pFile;                    //File pointer
	long lSize;                      //File size
	size_t result;

	// Open file
	pFile = fopen(filename, "rb");
	if (pFile == NULL)
	{
		printf("ERROR_OPEN_FILE");
		return ERROR_OPEN_FILE;
	}
	printf("OPEN_FILE\n");

	// 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");
		return ERROR_OPEN_FILE;
	}

	printf("MEMORY_ALLOCATED\t \"%d\" \n", lSize);
	// copy the file into the buffer:
	result = fread(content, 1, lSize, pFile);

	rewind(pFile);

	if (result != lSize)
	{
		printf("ERROR_SIZE");
		return ERROR_OPEN_FILE;
	}
	printf("SIZE_OK\n");

	// terminate
	fclose(pFile);
	printf("FILE_CLOSE\n");
	//allocate memory to contain the whole file + HEADER
	buffer = (char*)malloc(sizeof(char)*lSize + 2048);

	//print header
	sprintf(buffer, "%s\r\nContent-Disposition: form-data; name=\"%s\"; filename=\"%s\"\r\n", boundary, nameForm, filename);
	sprintf(buffer, "%sContent-Type: %s\r\n", buffer, type);
	//sprintf(buffer, "%sContent-Length: %d\r\n", buffer, lSize);
	sprintf(buffer, "%s\r\n%s\r\n", buffer, content);

	/**
	sprintf(buffer, "%s\r\n", buffer);
	memcpy(buffer + strlen(buffer),content,lSize);
	sprintf(buffer, "%s\r\n", buffer);
	*/
	sprintf(buffer, "%s%s--\r\n", buffer, boundary);

	//Open internet connection
	HINTERNET hSession = InternetOpen(L"WINDOWS", INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0);
	if (hSession == NULL)
	{
		printf("ERROR_INTERNET_OPEN");
		return ERROR_OPEN_FILE;
	}
	printf("INTERNET_OPENED\n");

	HINTERNET hConnect = InternetConnect(hSession, iaddr, port, NULL, NULL, INTERNET_SERVICE_HTTP, 0, 1);
	if (hConnect == NULL)
	{
		printf("ERROR_INTERNET_CONN");
		return ERROR_INTERNET_CONN;
	}
	printf("INTERNET_CONNECTED\n");

	HINTERNET hRequest = HttpOpenRequest(hConnect, L"POST", T2W((LPTSTR)&url), NULL, NULL, NULL, INTERNET_FLAG_RELOAD, 1);
	if (hRequest == NULL)
	{
		printf("ERROR_INTERNET_REQ");
		return ERROR_INTERNET_REQ;
	}
	printf("INTERNET_REQ_OPEN\n");

	BOOL sent = HttpSendRequest(hRequest, hdrs, strlen((char*)&hdrs), buffer, (DWORD)strlen(buffer));

	if (!sent)
	{
		printf("ERROR_INTERNET_SEND");
		return ERROR_INTERNET_CONN;
	}
	printf("INTERNET_SEND_OK\n");
	printf("\r\n%s\r\n", buffer);

	//close any valid internet-handles
	InternetCloseHandle(hSession);
	InternetCloseHandle(hConnect);
	InternetCloseHandle(hRequest);
	return NOERROR;
}

BOOL IsExistProcess(CONST CHAR* szProcessName) {
	PROCESSENTRY32 processEntry32;
	HANDLE toolHelp32Snapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
	if (((int)toolHelp32Snapshot) != -1) {
		processEntry32.dwSize = sizeof(processEntry32);
		if (Process32First(toolHelp32Snapshot, &processEntry32))
		{
			do {
				char output[300];
				sprintf_s(output, "%ws", processEntry32.szExeFile);
				if (strcmp(szProcessName, output) == 0)
				{
					return TRUE;
				}
			} while (Process32Next(toolHelp32Snapshot, &processEntry32));
		}
		CloseHandle(toolHelp32Snapshot);
	}
	return FALSE;
}