左右分不清

2016年11月14日星期一

[C++]Interprocess Communications (MailSlot)

#include "stdafx.h"
#include <Windows.h>
#include <strsafe.h>
#include <stdio.h>

HANDLE hSlot;
LPTSTR Slot = TEXT("\\\\.\\mailslot\\test_mailslot");

BOOL ReadSlot()
{
DWORD cbMessage, cMessage, cbRead;
BOOL fResult;
LPTSTR lpszBuffer;
TCHAR achID[80];
DWORD cAllMessages;
HANDLE hEvent;
OVERLAPPED ov;

cbMessage = cMessage = cbRead = 0;

hEvent = CreateEvent(NULL, FALSE, FALSE, TEXT("ExampleSlot"));

if (NULL == hEvent)
return FALSE;

ov.Offset = 0;
ov.OffsetHigh = 0;
ov.hEvent = hEvent;

fResult = GetMailslotInfo(hSlot, (LPDWORD)NULL, &cbMessage, &cMessage, (LPDWORD)NULL);

if (!fResult)
{
printf("Get MailSlot failed %d.\n", GetLastError());
return FALSE;
}

if (cbMessage == MAILSLOT_NO_MESSAGE)
{
printf("Waiting for a message\n");
return TRUE;
}

cAllMessages = cMessage;

while (cMessage != 0)
{
StringCchPrintf((LPTSTR)achID, 80, TEXT("\nMessage #%d of %d\n"), cAllMessages - cMessage + 1, cAllMessages);

lpszBuffer = (LPTSTR)GlobalAlloc(GPTR, lstrlen((LPTSTR)achID)*sizeof(TCHAR) + cbMessage);

if (NULL == lpszBuffer) return FALSE;

lpszBuffer[0] = '\0';

fResult = ReadFile(hSlot, lpszBuffer, cbMessage, &cbRead, &ov);

if (!fResult)
{
printf("Read Fail %d\n", GetLastError());
GlobalFree((HGLOBAL)lpszBuffer);
return FALSE;
}

StringCbCat(lpszBuffer, lstrlen((LPTSTR)achID)*sizeof(TCHAR) + cbMessage, (LPTSTR)achID);

_tprintf(TEXT("Contents of the mail:%s\n"), lpszBuffer);

GlobalFree((HGLOBAL)lpszBuffer);

fResult = GetMailslotInfo(hSlot, (LPDWORD)NULL, &cbMessage, &cMessage, (LPDWORD)NULL);

if (!fResult)
{
printf("Get Mail Slot Info %d\n", GetLastError());
}

}
CloseHandle(hEvent);
return TRUE;
}

int main()
{

hSlot = CreateMailslot(Slot, 0, MAILSLOT_WAIT_FOREVER, (LPSECURITY_ATTRIBUTES) NULL);

if (hSlot == INVALID_HANDLE_VALUE)
{
printf("Create Mail Slot Failed:%d \n", GetLastError());
return 0;
}
else printf("Mail slot create ok!!\n");

while (TRUE)
{
ReadSlot();
Sleep(3000);
}
}

=============================================================================================

#include "stdafx.h"

#include <windows.h>
#include <stdio.h>

LPTSTR SlotName = TEXT("\\\\.\\mailslot\\test_mailslot");

int main()
{

HANDLE hfile;

hfile = CreateFile(SlotName, GENERIC_WRITE, FILE_SHARE_READ, (LPSECURITY_ATTRIBUTES)NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, (HANDLE)NULL);

if (hfile == INVALID_HANDLE_VALUE)
{
printf("CreateFile failed with %d\n", GetLastError());

return FALSE;
}

BOOL fResult;
DWORD cbWritten;

fResult = WriteFile(hfile, SlotName, (DWORD)(lstrlen(SlotName) + 1)*sizeof(TCHAR), &cbWritten, (LPOVERLAPPED)NULL);

if (!fResult)
{
printf("Write file failed:%d \n", GetLastError());

return FALSE;
}

printf("Slot written to successfully \n");

CloseHandle(hfile);

for (int h = 0; h < 10000; h++) Sleep(2000);

return 0;

}

執行結果:

2016年11月13日星期日

CGI study

不錯的文章:

閒聊CGI(Common Gateway Interface)程式
http://blog.yam.com/csylvia/article/19952784

www service Ifo
http://blog.xuite.net/coke750101/networkprogramming/56098687

httpClient抓取网页–linux C/C++
http://www.xuebuyuan.com/2121856.html

Linux下C抓取网页

http://blog.csdn.net/hejinwei_1987/article/details/7540500

2016年11月7日星期一

[C#]Interprocess Communications (File Mapping)

Send:

using System.IO.MemoryMappedFiles;

namespace ConsoleApplication_IPC_FileMappingSend
{
class Program
{
static void Main(string[] args)
{

MemoryMappedFile mmf = MemoryMappedFile.CreateNew("test", 1000);

MemoryMappedViewAccessor accessor = mmf.CreateViewAccessor();

accessor.Write(500, 42);

Console.WriteLine("Memory-mapped file created!");

Console.ReadLine();

accessor.Dispose();

mmf.Dispose();

}
}
}

Recvive:

using System.IO.MemoryMappedFiles;

namespace ConsoleApplication_IPC_FileMappingRec
{
class Program
{
static void Main(string[] args)
{
MemoryMappedFile mmf = MemoryMappedFile.OpenExisting("test");

MemoryMappedViewAccessor accessor = mmf.CreateViewAccessor();
int value = accessor.ReadInt32(500);
Console.WriteLine("the answer is {0}", value);

Boolean zeon1 = accessor.CanRead;

mmf.Dispose();

Console.ReadLine();
}
}
}

[C#]Interprocess Communications (Data Copy)

Send:

using System.Runtime.InteropServices;

namespace WindowsFormsApplication_IPC_DataCopy_Send

{

public partial class Form1 : Form

{

[DllImport("user32.dll")]

static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, int wParam, IntPtr lParam);

[DllImport("user32.dll")]

private static extern int SendMessage(IntPtr hwnd, uint wMsg, int wPar);

[DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]

static extern uint RegisterWindowMessage(string lpString);

uint MSG_SHOW = RegisterWindowMessage("Show Message");

[DllImport("user32.dll")]

static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

public Form1()

{

InitializeComponent();

}

private void button1_Click(object sender, EventArgs e)

{

IntPtr nPrt = FindWindow(null, "TT");

if(nPrt != IntPtr.Zero && textBox1.Text.Trim()!="")

{

try

{

string tempword = textBox1.Text.Trim();

int iNum = int.Parse(tempword);

SendMessage(nPrt, MSG_SHOW, iNum , IntPtr.Zero);

}

catch(Exception ex)

{

MessageBox.Show(ex.ToString());

}

Receive:

using System.Runtime.InteropServices;

namespace WindowsFormsApplication_IPC_DataCopy_Rec

{

public partial class Form1 : Form

{

[DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]

static extern uint RegisterWindowMessage(string lpString);

uint MSG_SHOW = RegisterWindowMessage("Show Message");

public Form1()

{

InitializeComponent();

}

protected override void WndProc(ref Message m)

{

if(m.Msg==MSG_SHOW)

{

label1.Text = (string)m.WParam.ToString();

}

base.WndProc(ref m);

}

2016年11月6日星期日

[C#]Interprocess Communications (Clipboard)

使用剪貼簿的方法:
Clipboard.SetText
Clipboard.SetImage
Clipboard.SetData

Clipboard.GetText
Clipboard.GetImage
Clipboard.GatData

好像一次只能有一筆,不能一次Set多筆,然後慢慢接收.......@#$$$%%%%%

參考:

http://stackoverflow.com/questions/3546016/how-to-copy-data-to-clipboard-in-c-sharp

2016年11月3日星期四

[C#]程式視窗縮到右下小工作列內

在 Toolbox 內選用 NotiftIcon,Properties 內,選 Icon 及當指標到圖示時,需顯示的 Text

namespace WindowsFormsApplication_NotifyEx
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();

}

private void Form1_SizeChanged(object sender, EventArgs e)
{
if(this.WindowState==FormWindowState.Minimized)
{
this.Hide();
this.notifyIcon1.Visible = true;
}
}

//右下角圖示按兩下滑鼠指標
private void notifyIcon1_MouseDoubleClick(object sender, MouseEventArgs e)
{
this.Show();
this.WindowState = FormWindowState.Normal;
this.notifyIcon1.Visible = false;

}
}
}

C# 讓表單執行時最大化、最小化、預設大小、最上層顯示
https://ithelp.ithome.com.tw/articles/10029790

[C#] WPF Notify Icon

http://cowbaycoding.blogspot.com/2017/02/c.html

[Raspberry] TCP/IP 傳輸之 server/client 程式

Socket 在哪邊:

TCP:

UDP:

hostaddress 由4 byte的數字組成,socket中的struct in_addr 將這個整束包裝起來,定義在in.h

struct in_addr {

__be32 s_addr;

}

特殊的host address number:

l INADDR_LOOPBACK:指本機的address,也就是127.0,0,1(localhost)

l INADDR_ANY:指任何連上來的address

l INADDR_BROADCAST:傳送broadcast訊息才可使用

l INADDR_NONE:某些function錯誤時的回傳值

字節順序轉換函數：

htonl():把32位值從主機字節序轉換成網絡字節序

htons():把16位值從主機字節序轉換成網絡字節序

ntohl():把32位值從網絡字節序轉換成主機字節序

ntohs():把16位值從網絡字節序轉換成主機字節序

Bind函數將socket與本機上的一個埠相關聯.你就可以在該埠監聽服務請求

Client端:

#include <cstdlib>

#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <netdb.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <arpa/inet.h>

using namespace std;

/*
*
*/
int main(int argc, char** argv) {

    int sockfd=0,n=0;
    char recvBuff[1024];
    struct sockaddr_in serv_addr;

    if(argc!=2)
    {
        printf("\n Usage:%s <ip of server> \n",argv[0]);
        return 1;
    }

    memset(recvBuff,'0',sizeof(recvBuff));

    if((sockfd=socket(AF_INET,SOCK_STREAM,0))<0)
    {
        printf("\n Error: Could not create socket \n");
        return 1;
    }

    memset(&serv_addr,'0',sizeof(serv_addr));

    serv_addr.sin_family=AF_INET;

    serv_addr.sin_port=htons(5000);

    if(inet_pton(AF_INET,argv[1],&serv_addr.sin_addr)<=0)
    {
        printf("\n inet_pton error occured\n");
        return 1;
    }

    if(connect(sockfd,(struct sockaddr *)&serv_addr,sizeof(serv_addr))<0)
    {
        printf("\n Error:Connect Failed \n");
        return 1;
    }


    while((n=read(sockfd,recvBuff,sizeof(recvBuff)-1))>0)
    {
        recvBuff[n]=0;
        if(fputs(recvBuff,stdout)==EOF)
        {
            printf("\n Error:Fputs error \n");
        }
    }

    if(n<0)
    {
        printf("\n Read error\n");
    }

    return 0;
}

SERVER端:
#include <cstdlib>

#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <time.h>

using namespace std;

/*
*
*/

int main(int argc, char** argv) {

    int listenfd=0,connfd=0;

    struct sockaddr_in serv_addr;

    char sendBuff[1025];

    time_t ticks;

    listenfd=socket(AF_INET,SOCK_STREAM,0);

    memset(&serv_addr,'0',sizeof(serv_addr));

    memset(sendBuff,'0',sizeof(sendBuff));

    serv_addr.sin_family=AF_INET;

    serv_addr.sin_addr.s_addr=htonl(INADDR_ANY);

    serv_addr.sin_port=htons(5000);

    bind(listenfd,(struct sockaddr*)&serv_addr,sizeof(serv_addr));

    listen(listenfd,10);

    while(1)
    {
        connfd=accept(listenfd,(struct sockaddr *)NULL,NULL);

        ticks=time(NULL);

        snprintf(sendBuff,sizeof(sendBuff),"%.24s\r\n",ctime(&ticks));

        write(connfd,sendBuff,strlen(sendBuff));

        close(connfd);

        sleep(1);
    }
    return 0;
}

參考:

http://www.thegeekstuff.com/2011/12/c-socket-programming/

訂閱：文章 (Atom)

2016年11月14日 星期一

2016年11月13日 星期日

2016年11月7日 星期一

2016年11月6日 星期日

2016年11月3日 星期四

2016年11月14日星期一

2016年11月13日星期日

2016年11月7日星期一

2016年11月6日星期日

2016年11月3日星期四