Unzip file from resources

JCompier

Hello all i know how can i unzip file from hardisk but how can i Unzip file from resources directly without copy it to outside of resources first

OriginalGriff

Please don't repost if your question does not appear immediately: all of these went to moderation and required a human being to review them for publication. In order to prevent you being kicked off as a spammer, all four had to be accepted, and then I have to clean up the spares. Have a little patience, please! I'll delete the other three versions.

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Daniel Pfeffer

Most compression libraries treat the file to be decompressed as a stream of bytes. If you have the source code for the library, you can modify it as follows: 1. Load the resource (instead of opening the file) 2. Convert all reads from the file to memcpy() operations 3. Discard the resource (instead of closing the file) In a well-written library, you shouldn't have too many places that require modification.

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JCompiler

How can i open the file directly from resources i havnt no idea

Richard Deeming

Assembly.GetManifestResourceStream[^] will give you a Stream which you can use to read the content of an embedded resource. Why have you created two different accounts to post the same question? :confused: JCompiler - Professional Profile[^] JCompier - Professional Profile[^]

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JCompiler

I dont know i created just one but i was have an erreo on confirmision . I dont know where the problem

JCompiler

yes iam now using this code

        string resource = "Installer.Resources.myFile.zip";
        System.Reflection.Assembly a = System.Reflection.Assembly.GetExecutingAssembly();
        Stream resFilestream = a.GetManifestResourceStream(resource);

but i can't use the

ZipArchive archive = ZipFile.OpenRead(resFilestream);

becouse the OpenRead Function need the path of physical path on hard disk what can i do to can full archive with myFile.zip to can i read it and extract any file contains in this archive

Richard Deeming

ZipArchive archive = new ZipArchive(resFilestream);

ZipArchive Class (System.IO.Compression) | Microsoft Docs[^]

"These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer

jschell

JCompier wrote:

Unzip file from resources directly without copy it to outside of resources first

Make sure of course both of the following are true - You realize that it would still be in memory and memory can be swapped to the hard drive. I only bring this up because I have seen requests before involving military work where the content could not be stored under any circumstances. - You determine that the source (zip file) will never be 'big'. So a 1k zip file is ok but if it is possible and you do not specifically code a check for this, that the file is 100 meg or 1 gig, then unzipping in memory is going to be a problem.

Richard Deeming

jschell wrote:

So a 1k zip file is ok but if it is possible and you do not specifically code a check for this, that the file is 100 meg or 1 gig, then unzipping in memory is going to be a problem.

If the file could be modified by a malicious actor, even a small zip file could be a problem:

Zip bomb - Wikipedia[^]:

One example of a zip bomb is the file 42.zip, which is a zip file consisting of 42 kilobytes of compressed data, containing five layers of nested zip files in sets of 16, each bottom layer archive containing a 4.3-gigabyte file for a total of 4.5 petabytes of uncompressed data.

"These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer