I have written a C# Custom Action that is supposed to get the Values of
Properties passed to the installer and create some config file. Since the
C# Custom action was done, my installer depends upon .Net too. I want to
avoid this dependency, thus I am opting to write the Custom action in C++.
Following is the C# code that I'm trying to convert in C++:
session.Log("Entering WriteFileToDisk");string ipAddress =
session["IPADDRESS"];string productCode =
session["ProductCode"];string config_path =
"C:\\SomeFolderToInstall\\";string compression =
session["COMPRESSION"];string ssl = session["SSL"];if
(string.IsNullOrEmpty(compression)){
compression = "True"; //default true}if (string.IsNullOrEmpty(ssl)){
ssl = "False"; //default false}if (string.IsNullOrEmpty(ipAddress)){
ipAddress = "127.0.0.1";}string temp = @"
{{
""logpoint_ip"" : ""{0}"",
""compression"" : ""{1}"",
""ssl"": ""{2}""
}}";string filePath =
"C:\\SomeFolderToInstall\\lpa.config";System.IO.FileInfo file = new
System.IO.FileInfo(filePath);
file.Directory.Create(); // If the directory already exists, this
method does nothing.System.IO.File.WriteAllText(file.FullName,
config);System.IO.File.WriteAllText(config_path + "productcode.txt",
productCode);
session.Log("Confile file is written");
session.Log("Product Code file is written");return ActionResult.Success;
The Visual C++ code is given below:
#include "stdafx.h"
UINT __stdcall WriteFileToDisk(MSIHANDLE hInstall){
HRESULT hr = S_OK;
UINT er = ERROR_SUCCESS;
hr = WcaInitialize(hInstall, "WriteFileToDisk");
ExitOnFailure(hr, "Failed to initialize");
LPWSTR ip = NULL;
hr = WcaGetProperty(L"IPADDRESS",&ip);
ExitOnFailure(hr, "Failure in IPADDRESS");
if(ip == L"" || ip == NULL)
{
ip = L"127.0.0.1";
}
WcaLog(LOGMSG_STANDARD, (PCSTR)ip);
LPWSTR ssl = NULL;
hr = WcaGetProperty(L"SSL",&ssl);
ExitOnFailure(hr, "Failure in SSL");
if(ssl == L"" || ssl == NULL)
{
ssl = L"False";
}
LPWSTR comp = NULL;
hr = WcaGetProperty(L"COMPRESSION",&comp);
ExitOnFailure(hr, "Failure in COMPRESSION");
if(comp == L"" || comp == NULL)
{
comp = L"True";
}
WcaLog(LOGMSG_STANDARD, "Got the Parameters");
char buffer[150];
sprintf(buffer, "{\n\"ipaddress\": \"%s\",\n\"ssl\":
\"%s\",\n\"compression\":\"%s\"\n}",ip,ssl,comp);
WcaLog(LOGMSG_STANDARD, "Config Generated is : ");
WcaLog(LOGMSG_STANDARD, buffer);
HANDLE hFile;
hFile = CreateFile(L"C://LogPointAgent//some_config.config",
// name of the write
GENERIC_WRITE, // open for writing
0, // do not share
NULL, // default security
CREATE_NEW, // create new file only
FILE_ATTRIBUTE_NORMAL, // normal file
NULL);
if (hFile == INVALID_HANDLE_VALUE)
{
WcaLog(LOGMSG_STANDARD, "Invalid Handle for Config File");
ExitFunction();
}
BOOL bErrorFlag;
DWORD dwBytesToWrite = (DWORD)strlen(buffer);
DWORD dwBytesWritten = 0;
bErrorFlag = WriteFile(
hFile, // open file handle
buffer, // start of data to write
dwBytesToWrite, // number of bytes to write
&dwBytesWritten, // number of bytes that were written
NULL); // no overlapped structure
if (FALSE == bErrorFlag)
{
WcaLog(LOGMSG_STANDARD, "Terminal failure: Unable to write to file.\n");
}
else
{
if (dwBytesWritten != dwBytesToWrite)
{
// This is an error because a synchronous write that results in
// success (WriteFile returns TRUE) should write all data as
// requested. This would not necessarily be the case for
// asynchronous writes.
WcaLog(LOGMSG_STANDARD, "Error: dwBytesWritten !=
dwBytesToWrite\n");
}
else
{
WcaLog(LOGMSG_STANDARD, "Wrote Config file Successfully");
}
}
CloseHandle(hFile);LExit:
er = SUCCEEDED(hr) ? ERROR_SUCCESS : ERROR_INSTALL_FAILURE;
return WcaFinalize(er);}
UINT __stdcall DeleteResidue(MSIHANDLE hInstall){
HRESULT hr = S_OK;
UINT er = ERROR_SUCCESS;
hr = WcaInitialize(hInstall, "DeleteResidue");
ExitOnFailure(hr, "Failed to initialize");
LExit:
er = SUCCEEDED(hr) ? ERROR_SUCCESS : ERROR_INSTALL_FAILURE;
return WcaFinalize(er);}// DllMain - Initialize and cleanup WiX
custom action utils.extern "C" BOOL WINAPI DllMain(
__in HINSTANCE hInst,
__in ULONG ulReason,
__in LPVOID
){
switch(ulReason)
{
case DLL_PROCESS_ATTACH:
WcaGlobalInitialize(hInst);
break;
case DLL_PROCESS_DETACH:
WcaGlobalFinalize();
break;
}
return TRUE;}
C++ code is successfully compiled. When used in Wix as:
<Binary Id="SetupCA"
SourceFile="..\WixCustomActionCPP\bin\Release\WixCustomActionCPP.dll"/><CustomAction
Id="WRITEFILETODISK" Execute="immediate" BinaryKey="SetupCA"
DllEntry="WriteFileToDisk" /><InstallExecuteSequence>
<Custom Action="WRITEFILETODISK" Before="InstallFinalize">NOT
Installed</Custom></InstallExecuteSequence>
When installer is supposed to get installed as msiexec /i installer.msi
/l*v out.txt IPADDRESS="192.168.2.208", following config should have been
created
{"ip":"192.168.2.208","ssl":"False","compression":"True"}
but what it generates is:
{"ipaddress": "1","ssl": "","compression":""}
What is wrong in my C++ code here? Any help would be appreciated. Thanks.
--
*sarvagya*
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