Hi, After searching for two days now, I could not find a simple recepie to on how to connect to a python local com server (exe) from a C++ client (VC6.0). Note that eventually I would want to package my server using py2exe, however even without this step - it doesn't work.
I'm getting kind of desperate since this means the code I've worked on is useless since the software guys can't connect to it from C++. I've counted on Python to do the trick but now I see it's not that simple and maybe not possible. Below you can find a simple example for a Python COM local server (exe) that has only 1 method - Add() - to add 2 integers and return the result. I've written the IDL file, compiled it with MIDL, and included into the C++, as explained in http://www.codeproject.com/com/LocalCOMServerClient.asp. The part most confusing is the differnt GUID numbers (type library, class, and interface) and exactly where to put what. Specifically, where should the value entered in '_reg_clsid_' (python) fit in the IDL file? and where to take the 2 other GUID's that should be entered in the IDL file? Also, Visual Studio OLE Viewer, I saw "Python Com Server" (and the PTCS interface under it after I register PTCS.py), will that be present or required in py2exe environmetn where there is no python installation? In addition, how can I make my server show in PythonWin's 'MakePy' utility or 'COM Browser'? Any help would be greatly appreciated, I'd later post the clean example for anyone to use. Thanks in advance - Gal. # ---------------------------- # PTCS.py # ---------------------------- # PTCS == Python Test Com Server # small local server (out of process) python com server, try to connect from C++ client (VC++6.0 client) import win32com.server.register import pythoncom class PTCS: """ PTCS - Python Test Com (local) Server has only 1 simple function - Add - to add two int's and return the result. """ _public_methods_ = [ 'Add' ] _reg_progid_ = "PTCS" _reg_clsid_ = "GUID1" # ------- GUID1 ----------- _reg_clsctx_ = pythoncom.CLSCTX_LOCAL_SERVER def __init__(self): pass def Add(self,a,b): """ add the 2 passed integeres. """ return a+b if __name__ == '__main__': win32com.server.register.UseCommandLine(PTCS, debug=True) # ---------------------------- # PTCS.idl # ---------------------------- // PTCS.idl : IDL source for PTCS.dll // // This file will be processed by the MIDL tool to // produce the type library (PTCS.tlb) and marshalling code. import "oaidl.idl"; import "ocidl.idl"; [ object, uuid(GUID1), // ---- GUID1 -------- dual, helpstring("PTCS Com Interface"), pointer_default(unique) ] interface ICoPTCS : IDispatch { [id(1), helpstring("method Add: add 2 integers")] HRESULT Add([in] int* a, [in] int* b, [out, retval] int* res ); }; [ uuid(GUID2), // ---- GUID2 -------- version(1.0), helpstring("PTCS 1.0 Type Library") ] library PTCSLib { importlib("stdole32.tlb"); importlib("stdole2.tlb"); [ uuid(GUID3), // ---- GUID3 -------- helpstring("CoPTCS Class") ] coclass CoPTCS { [default] interface ICoPTCS; }; }; # ---------------------------- # main.cpp (modified from http://www.codeproject.com/com/LocalCOMServerClient.asp) # ---------------------------- #include "../../eclipse_workspace1\PTCS\src\IDL\PTCS.h" // use your own path here #include "../../eclipse_workspace1\PTCS\src\IDL\PTCS_i.c" // use your own path here #include "iostream.h" // for showing possible mistakes void ShowErrorMessage(LPCTSTR,HRESULT); int main() { // initialize the COM runtime cout << "Initialize the COM runtime..."; CoInitialize(NULL); cout << "success." << endl; // declare variables HRESULT hr; IClassFactory* pICF = NULL; ICoPTCS* pIPTCS = NULL; cout << endl << "Get the class factory interface for the PTCS class..."; hr = CoGetClassObject(CLSID_CoPTCS,CLSCTX_LOCAL_SERVER, // --------- what should I put here? --------- NULL,IID_IClassFactory,(void**)&pICF); if ( FAILED(hr) ) { ShowErrorMessage("CoGetClassObject()",hr); exit(1); } else cout << "success." << endl; cout << "Create the PTCS instance object and get back the IPTCS interface..."; hr = pICF->CreateInstance(NULL,IID_IPTCS,(void**)&pIPTCS); // --------- what should I put here? --------- if ( FAILED(hr) ) { ShowErrorMessage("CoCreateInstance()",hr); exit(1); } else cout << "success." << endl; if ( pICF ) pICF->Release(); if ( pIPTCS) pIPTCS->Release(); cout << endl << "Close the COM runtime..."; CoUninitialize(); cout << "success." << endl; return 0; } void ShowErrorMessage(LPCTSTR header, HRESULT hr) { void* pMsg; FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,NULL,hr, MAKELANGID(LANG_NEUTRAL,SUBLANG_DEFAULT), (LPTSTR)&pMsg,0,NULL); cout << header << ": Error(" << hex << hr << "): " << (LPTSTR)pMsg << endl; LocalFree(pMsg); } ---- end of mail _______________________________________________ python-win32 mailing list python-win32@python.org http://mail.python.org/mailman/listinfo/python-win32
