FireBreath Write to AppData LocalLow From Internet Explorer

Question

I have a FireBreath plugin source that somebody wrote that I'm trying to make compatible with Internet Explorer. In this plugin, .flv video is downloaded and then FFMPEG is executed within the Windows CMD.EXE to convert the .flv to another media format. The command is run from CreateProcess(...).

My problem is that the CreateProcess command always returns an error code 5, which I suppose is Access Denied. The command works on the command line (FFMPEG does the conversion correctly), but not from the plugin.

Note, that I have gotten the AppData path with:

string appDataPath = FB::System::getLocalAppDataPath("My Company Name LLC")

Is there a registry key somewhere that must be added to "initialize" this path?

Answer 1

Assuming it doesn't work on Chrome/Firefox as well.

1. If you are trying to run your own executable - specify the absolute path.
2. Try to load a DLL in the same folder using LoadLibrary - I think this could provide better info of whether or not the path is correct.

If IE is the only browser you are having problems with, read Understanding and Working in Protected Mode Internet Explorer.

See also FireBreath Tips and Tricks.

Answer 2

getLocalAppDataPath just returns a path to the localLow area in your user profile; in this case, it would most likely give you:

C:\Users\YourUser\AppData\LocalLow\My Company Name LLC

It doesn't ensure that directory has been created or anything like that. If you want to do that I'd recommend using boost::filesystem, since that would then be cross platform, but you can really use anything.

How to find out if a folder exists and how to create a folder? has some other good ideas mostly using system API calls (windows only).