Передача нескольких файлов со стороны клиента серверу через сокеты
26.12.2020, 00:01. Показов 3578. Ответов 1
Доброго времени суток. Поставлена задача: "Осуществить передачу нескольких файлов(например текстовых документов вместе с их содержимым) серверу". Написал приложение для клиента, который отправляет эти файлы, и для сервера, который должен получать эти данные. Подключаюсь к серверу успешно. Файлы выбираются тоже нормально. Проблема с передачей. То есть, когда нажимаю кнопку "Передать файл", программа-сервер просто замирает на этом
месте recvfile2((char*)&msgD, sizeof(msgD)).
Возможно вопрос покажется глупым, но я не понимаю, почему он зависает? Буду благодарен любым ответам.
Клиент
| C++ | 1
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| #define _WINSOCK_DEPRECATED_NO_WARNINGS
#define _CRT_SECURE_NO_WARNINGS
#include <Winsock2.h>
#include <Windows.h>
#include <windowsx.h>
#include <CommCtrl.h>
#include <tchar.h>
#include <strsafe.h>
#include <process.h>
#include <string>
#pragma comment(lib, "Ws2_32.lib")
using namespace std;
#define IDC_STATIC 2001
#define IDC_EDIT_OPEN_FILE_NAME 2003
#define IDC_BUTTON_CONNECTION 2004
#define IDC_BUTTON_CLOSE 2005
#define IDC_BUTTONOpen 2006
#define IDC_BUTTONSend 2007
#define IDC_BUTTONGet 2008
#define IDC_EDIT1 2011
#define IDC_EDIT2 2012
#pragma pack(1)
struct MainHeader
{
int CountofFiles; //Количество файлов
TCHAR adr[100]; //имя отправителя
};
#pragma pack()
#pragma pack(1)
struct DataHeader
{
TCHAR filename[50]; // имя файла
BYTE* filedata; //данные из файла
int filesize; //размер файла
};
#pragma pack()
SOCKET s;
SOCKET ss;
SOCKET sss;
volatile bool stoped = false;
MainHeader msgH;
//DataHeader msgD;
sockaddr_in soin;
wchar_t* NamesOfFile;
//HANDLE hFile = NULL;
TCHAR fullFileName[260];
TCHAR fileName[260] = L"";
TCHAR bufferNameIP[25];
//DWORD sizeBuffer;
//BYTE* byteBuffer;
DWORD result;
LRESULT CALLBACK WindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
void OnIdle(HWND hWnd);
BOOL OnCreate(HWND hWnd, LPCREATESTRUCT lpCreateStruct);
void OnDestroy(HWND hWnd);
void OnCommand(HWND hwnd, int id, HWND hwndCtl, UINT codeNotify);
void sendfile(SOCKET s, const char* buf, int len);
int WINAPI _tWinMain(HINSTANCE hInstance, HINSTANCE, LPTSTR lpszCmdLine, int nCmdShow) {
WNDCLASSEX wcex = { sizeof(WNDCLASSEX) };
wcex.style = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS;
wcex.lpfnWndProc = WindowProc;
wcex.hInstance = hInstance;
wcex.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW);
wcex.lpszMenuName = NULL;
wcex.lpszClassName = TEXT("WindowClass");
wcex.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
if (0 == RegisterClassEx(&wcex)) {
return -1;
}
LoadLibrary(TEXT("ComCtl32.dll"));
HWND hWnd = CreateWindowEx(NULL, TEXT("WindowClass"), TEXT("Client"),
WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, 550, 240, NULL, NULL, hInstance, NULL);
if (NULL == hWnd) {
return -1;
}
ShowWindow(hWnd, nCmdShow);
MSG msg;
BOOL bRet;
for (;;) {
while (!PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE)) {
OnIdle(hWnd);
}
bRet = GetMessage(&msg, NULL, 0, 0);
if (bRet == -1) {
}
else if (FALSE == bRet) {
break;
}
else {
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
return (int)msg.wParam;
}
LRESULT CALLBACK WindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {
switch (uMsg) {
HANDLE_MSG(hWnd, WM_CREATE, OnCreate);
HANDLE_MSG(hWnd, WM_DESTROY, OnDestroy);
HANDLE_MSG(hWnd, WM_COMMAND, OnCommand);
break;
}
return DefWindowProc(hWnd, uMsg, wParam, lParam);
}
BOOL OnCreate(HWND hWnd, LPCREATESTRUCT lpCreateStruct) {
CreateWindowEx(0, WC_BUTTON, TEXT("Соединиться c сервером"),
WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON, 275, 20, 240, 27, hWnd, (HMENU)IDC_BUTTON_CONNECTION, lpCreateStruct->hInstance, NULL);
CreateWindowEx(0, TEXT("Edit"), NULL, WS_CHILD | WS_VISIBLE | WS_BORDER | ES_MULTILINE, 20, 20, 240, 27, hWnd, (HMENU)IDC_EDIT1, lpCreateStruct->hInstance, NULL);
CreateWindowEx(0, TEXT("Edit"), NULL, WS_CHILD | WS_VISIBLE | WS_BORDER | ES_MULTILINE, 20, 60, 240, 27, hWnd, (HMENU)IDC_EDIT2, lpCreateStruct->hInstance, NULL);
CreateWindowEx(0, WC_STATIC, TEXT("- Никнейм отправителя"), WS_CHILD | WS_VISIBLE, 275, 60, 240, 27, hWnd, NULL, lpCreateStruct->hInstance, NULL);
CreateWindowEx(0, WC_BUTTON, TEXT("Завершить соединение"),
WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON, 20, 150, 240, 27, hWnd, (HMENU)IDC_BUTTON_CLOSE, lpCreateStruct->hInstance, NULL);
CreateWindowEx(0, WC_BUTTON, TEXT("Файл для отправки"),
WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON, 20, 110, 240, 27, hWnd, (HMENU)IDC_BUTTONOpen, lpCreateStruct->hInstance, NULL);
CreateWindowEx(0, WC_BUTTON, TEXT("Передать файл"),
WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON, 275, 110, 240, 27, hWnd, (HMENU)IDC_BUTTONSend, lpCreateStruct->hInstance, NULL);
WSADATA wsaData;
int err = WSAStartup(MAKEWORD(2, 2), &wsaData);
s = socket(AF_INET, SOCK_STREAM, 0);
return TRUE;
}
void OnDestroy(HWND hWnd)
{
closesocket(s);
WSACleanup();
PostQuitMessage(0);
}
void OnCommand(HWND hwnd, int id, HWND hwndCtl, UINT codeNotify)
{
if (BN_CLICKED == codeNotify)
{
HINSTANCE hInstance = GetWindowInstance(hwnd);
switch (id)
{
case IDC_BUTTON_CONNECTION:
{
GetDlgItemText(hwnd, IDC_EDIT1, (LPWSTR)bufferNameIP, _countof(bufferNameIP));
sockaddr_in sin = { 0 };
sin.sin_family = AF_INET;
sin.sin_port = htons(7581);
sin.sin_addr.s_addr = inet_addr("192.168.1.122");
int err = connect(s, (sockaddr*)&sin, sizeof(sin));
}
break;
case IDC_BUTTON_CLOSE:
{
int err = shutdown(s, SD_BOTH);
}
break;
case IDC_BUTTONOpen:
{
OPENFILENAME ofn;
ZeroMemory(&ofn, sizeof(ofn));
ofn.lStructSize = sizeof(ofn);
ofn.hwndOwner = hwnd;
ofn.hInstance = GetModuleHandle(NULL);
ofn.lpstrFile = fullFileName;
ofn.nMaxFile = MAX_PATH;
ofn.lpstrFilter = TEXT("Text files\0*.txt");
ofn.nFilterIndex = 1;
ofn.lpstrFileTitle = fileName;
ofn.nMaxFileTitle = MAX_PATH;
ofn.lpstrInitialDir = NULL;
ofn.Flags = OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST | OFN_EXPLORER | OFN_ALLOWMULTISELECT;
if (GetOpenFileName(&ofn) == TRUE)
{
MessageBox(NULL, TEXT("Файлы успешно выбраны"), TEXT("Client"), MB_OK | MB_ICONINFORMATION);
int nOffset = ofn.nFileOffset;
if (nOffset > lstrlen(ofn.lpstrFile))
{
while (ofn.lpstrFile[nOffset])
{
nOffset = nOffset + wcslen(ofn.lpstrFile + nOffset) + 1;
msgH.CountofFiles++;
}
}
else
{
msgH.CountofFiles++;
}
}
}
break;
case IDC_BUTTONSend:
{
TCHAR Buf[100] = L"";
GetDlgItemTextA(hwnd, IDC_EDIT2, (LPSTR)Buf, 128);
StringCchCopy(msgH.adr, 100, Buf);
sendfile(s, (const char*)&msgH, sizeof(msgH));
NamesOfFile = fullFileName;
wstring directory = NamesOfFile;
NamesOfFile += (directory.length() + 1);
while (*NamesOfFile)
{
wstring filename = NamesOfFile;
HANDLE hFile = CreateFile(NamesOfFile, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, NULL, NULL);
if (INVALID_HANDLE_VALUE != hFile) {
OVERLAPPED ReadOL;
//ReadOL.Offset = 0;
//ReadOL.OffsetHigh = 0;
LARGE_INTEGER li;
GetFileSizeEx(hFile, &li);
DWORD sizeBuffer = li.LowPart;
BYTE* byteBuffer = new BYTE[sizeBuffer];
ReadFile(hFile, byteBuffer, sizeBuffer, NULL, NULL);
DataHeader msgD;
StringCchCopy(msgD.filename, MAX_PATH, NamesOfFile);
msgD.filesize = sizeBuffer;
msgD.filedata = byteBuffer;
sendfile(s, (const char*)&msgD, sizeof(msgD));
delete[] byteBuffer;
CloseHandle(ReadOL.hEvent);
}
CloseHandle(hFile);
NamesOfFile += (filename.length() + 1);
}
}
break;
}
}
}
void sendfile(SOCKET s, const char* buf, int len) {
int n, l = 0;
while (len > 0) {
n = send(s, buf + l, len, 0);
if (n > 0) {
l += n;
len -= n;
}
}
} |
|
Сервер
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| #define _WINSOCK_DEPRECATED_NO_WARNINGS
#define _CRT_SECURE_NO_WARNINGS
#include <Winsock2.h>
#include <Windows.h>
#include <windowsx.h>
#include <CommCtrl.h>
#include <tchar.h>
#include <strsafe.h>
#include <process.h>
#pragma comment(lib, "Ws2_32.lib")
#define IDC_BUTTON1 2001
#define IDC_BUTTON2 2002
#define IDC_BUTTON3 2003
#pragma pack(1)
struct MainHeader
{
int CountofFiles; //Количество файлов
char adr[15]; //имя отправителя
};
#pragma pack()
#pragma pack(1)
struct DataHeader
{
char filename[50]; // имя файла
BYTE* filedata[260]; //данные из файла
int filesize; //размер файла
};
#pragma pack()
HWND hListBox = NULL;
volatile bool stoped = false;
SOCKET s;
SOCKET ss;
sockaddr_in sOut;
MainHeader msgH;
//DataHeader msgD;
char bufferNameIP[15];
HANDLE hFile = NULL;
void recvfile2(char* buf, int len);
unsigned __stdcall ListenThread(LPVOID lpParameter);
unsigned __stdcall RecvData(LPVOID lpParameter);
//unsigned __stdcall RecvHeader(LPVOID lpParameter);
LRESULT CALLBACK WindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
BOOL OnCreate(HWND hWnd, LPCREATESTRUCT lpCreateStruct);
void OnDestroy(HWND hWnd);
int WINAPI _tWinMain(HINSTANCE hInstance, HINSTANCE, LPTSTR lpszCmdLine, int nCmdShow) {
WNDCLASSEX wcex = { sizeof(WNDCLASSEX) };
wcex.style = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS;
wcex.lpfnWndProc = WindowProc;
wcex.hInstance = hInstance;
wcex.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW);
wcex.lpszMenuName = NULL;
wcex.lpszClassName = TEXT("WindowClass");
wcex.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
if (0 == RegisterClassEx(&wcex)) {
return -1;
}
LoadLibrary(TEXT("ComCtl32.dll"));
HWND hWnd = CreateWindowEx(NULL, TEXT("WindowClass"), TEXT("Server"),
WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, 550, 200, NULL, NULL, hInstance, NULL);
if (NULL == hWnd) {
return -1;
}
ShowWindow(hWnd, nCmdShow);
MSG msg;
BOOL bRet;
for (;;) {
bRet = GetMessage(&msg, NULL, 0, 0);
if (bRet == -1) {
}
else if (FALSE == bRet) {
break;
}
else {
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
return (int)msg.wParam;
}
LRESULT CALLBACK WindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {
switch (uMsg) {
HANDLE_MSG(hWnd, WM_CREATE, OnCreate);
HANDLE_MSG(hWnd, WM_DESTROY, OnDestroy);
case WM_COMMAND:
{
switch (LOWORD(wParam)) {
case IDC_BUTTON2:
{
int err = shutdown(ss, SD_BOTH);
}
break;
case IDC_BUTTON3:
{
recvfile2((char*)&msgH, sizeof(msgH));
TCHAR adr[100];
CHAR name[MAX_PATH] = "";
StringCchPrintf(adr, 100, TEXT("Файл получен от %s"), msgH.adr);
MessageBox(NULL, adr, TEXT("Server"), MB_OK | MB_ICONINFORMATION);
for (int i = 0; i < msgH.CountofFiles; i++)
{
DataHeader msgD;
[B] recvfile2((char*)&msgD, sizeof(msgD));[/B]
BYTE* byteBuffer = new BYTE[msgD.filesize];
//for (int i = 0; i < msgH.CountofFiles; i++)
//{
//BYTE* byteBuffer = new BYTE[msgD.filesize];
//byteBuffer = msgD.filedata;
hFile = CreateFile((LPCWSTR)msgD.filename, GENERIC_WRITE, FILE_SHARE_READ, NULL, CREATE_ALWAYS, FILE_FLAG_OVERLAPPED, NULL);
OVERLAPPED oWrite = { 0 };
oWrite.Offset = 0;
oWrite.hEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
if (INVALID_HANDLE_VALUE != hFile) {
WriteFile(hFile, msgD.filedata, msgD.filesize, NULL, &oWrite);
WaitForSingleObject(oWrite.hEvent, INFINITE);
CloseHandle(oWrite.hEvent);
//}
}
CloseHandle(hFile);
}
}
break;
return TRUE;
}
return 0;
}
}
return DefWindowProc(hWnd, uMsg, wParam, lParam);
}
BOOL OnCreate(HWND hWnd, LPCREATESTRUCT lpCreateStruct) {
CreateWindowEx(0, WC_BUTTON, TEXT("Завершить соединение"),
WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON, 150, 20, 240, 30, hWnd, (HMENU)IDC_BUTTON2, lpCreateStruct->hInstance, NULL);
CreateWindowEx(0, WC_BUTTON, TEXT("Получить файлы"),
WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON, 150, 60, 240, 30, hWnd, (HMENU)IDC_BUTTON3, lpCreateStruct->hInstance, NULL);
WSADATA wsaData;
int err = WSAStartup(MAKEWORD(2, 2), &wsaData);
if (0 == err) {
ss = socket(AF_INET, SOCK_STREAM, 0);
if (ss != INVALID_SOCKET) {
sOut = { AF_INET, htons(7581), INADDR_ANY };
bind(ss, (sockaddr*)&sOut, sizeof(sOut));
_beginthreadex(NULL, 0, ListenThread, NULL, 0, NULL);
}
}
return TRUE;
}
void OnDestroy(HWND hWnd) {
stoped = true;
closesocket(ss);
WSACleanup();
PostQuitMessage(0);
}
void recvfile2(char* buf, int len) {
int n;
while (len > 0 && stoped == false) {
n = recv(s, buf, len, 0);
if (n > 0) {
buf += n;
len -= n;
}
}
}
unsigned __stdcall ListenThread(LPVOID lpParameter)
{
int err = listen(ss, 5);
if (SOCKET_ERROR != err)
{
for (;;)
{
s = accept(ss, NULL, NULL);
MessageBox(NULL, TEXT("Соединение установлено"), TEXT("Server"), MB_OK | MB_ICONINFORMATION);
if (INVALID_SOCKET == s)
{
if (WSAEINTR == WSAGetLastError()) break;
}
}
}
return 0;
} |
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Сообщение от Just_Dava
