Read a json file from within a zip file

Question

User-183185495 posted

Is their a way in c# to read a file that is within a zip file I am developing an addon manager in .net for msfs and each add on has a maanifset.json included inside their zip files.

Is there a way to discover that file within the zip file itself without unpacking it and deserlize its contents for example the file strcuture of the add on would look like below.

Please note : I wish to read the file either from a url or disk without extracting it to a tempory location same way an api would fetch the data.

{
  "dependencies": [
    {
      "name": "fs-base-propdefs",
      "package_version": "0.1.2"
    }
  ],
  "content_type": "AIRCRAFT",
  "title": "Savage Carbon",
  "manufacturer": "Zlin Aviation & Got Gravel",
  "creator": "Asobo Studio & Got Gravel",
  "package_version": "0.1.35",
  "minimum_game_version": "1.9.2",
  "release_notes": {
    "neutral": {
      "LastUpdate": "",
      "OlderHistory": ""
    }
  },
  "total_package_size": "00000000000538203000"
}

 

This would normally be a zip file for example gotgravel-savage-carbon.zip I would be uploading the zip file to the server or else reading it from an url. I want to extract the info in mainfest.json

Answer 1

User-474980206 posted

Use the zip file archive library

https://docs.microsoft.com/en-us/dotnet/api/system.io.compression.ziparchive.entries?view=net-5.0

Answer 2

User-183185495 posted

This example is still extracting the zip file to some tempory location i want to read it frrom uncompressed zp file

Use the zip file archive library

https://docs.microsoft.com/en-us/dotnet/api/system.io.compression.ziparchive.entries?view=net-5.0

Answer 3

User-474980206 posted

You can use streams (memory) instead of files, read the zip as stream, then loop thru entries until you find json file, then stream the json file to a buffer or into a json reader.

Answer 4

User-857013053 posted

You can follow this link for read a json file from within a zip file

https://social.msdn.microsoft.com/Forums/en-US/c3be2f07-821e-482c-b9e5-0c8add5506e0/reading-contents-of-a-zip-file-within-a-zipfile-without-extracting?forum=csharpgeneral