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+---- Thread: Apply a diff file to another file (/showthread.php?tid=510)
Apply a diff file to another file - Covert2String - 04-06-2012
Hello, so I need to apply a diff file to another file, the application should read the diff file and apply it, I just don't know how. Just like a regular file patcher, but instead of downloading the file, it just changes the original to the newer version.
Thanks in advance
Re: Apply a diff file to another file - brandonio21 - 04-06-2012
Can't you just use the
Code:
My.Computer.FileSystem.MoveFile(sourceFileName ,destinationFileName ,overwrite)Method? And set overwrite to true so it overwrites the new file.
Re: Apply a diff file to another file - Covert2String - 04-07-2012
A simple patcher is easy... What I want to do is an application that gets which files are different, reads the diff file for each one and applies it to the client files. This would avoid downloading a 1 MB file just because I changed a variable for example.
Re: Apply a diff file to another file - brandonio21 - 04-07-2012
Ah, so you want to actually get into the binary code and change it to what the new version should be? If so, I don't really think this is possible due to the fact that executables are compiled, and the source code is not directly editable.
Re: Apply a diff file to another file - Covert2String - 04-07-2012
That's why I need to edit it like an Hexadecimal editor, I read the offset and the new value from a file in a webserver and edit the file in the client's PC.
Re: Apply a diff file to another file - brandonio21 - 04-07-2012
Well, to read the contents of a file, you need to use this code:
Code:
IO.File.ReadAllBytes("file path here")So you could use that to find where the differences are. And then I'm guessing you can just use a StreamWriter to write them all back into the file.
Re: Apply a diff file to another file - Covert2String - 04-07-2012
I'll try it. Thank you, like always, you have the answer!
Re: Apply a diff file to another file - brandonio21 - 04-07-2012
Heh, Well I'm here to help! Please report back with your findings!
Re: Apply a diff file to another file - Covert2String - 04-09-2012
Well, fortunately the patcher won't need to change files this way, so I'll do it in the "normal" way, thanks though. Btw, I have a new question, please check the new topics