Blueprint string help

[The Eriksonn]

I want to have a c# program to create Blueprint strings for combinators.
I have some problem with turning the raw Blueprint string into something readable.
What I want is a function to decode the string into a useful json text and Another to do the opposite.

I have the zlib api to help decode it but it dont work.

plz help…

Source Code

Code: Select all

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Data.Common;
using System.IO;
using System.IO.Compression;
using zlib;

namespace ConsoleStuff
{
    class Program
    {
        static void Main(string[] args)
        {
            string line = Console.ReadLine();

            var B = Encoding.UTF8.GetBytes(line);
            byte[] New = new byte[B.Length - 1];
            for (int i = 0; i < New.Length; i++)
            {
                New[i] = B[i + 1];
            }
            string S = Encoding.UTF8.GetString(New);
            byte[] B2 = Convert.FromBase64String(S);
            string S4 = UnZipStr(B2);
            Console.WriteLine(S4);

            Console.ReadKey();
        }
        public static string Base64Encode(string plainText)
        {
            var plainTextBytes = System.Text.Encoding.UTF8.GetBytes(plainText);
            return System.Convert.ToBase64String(plainTextBytes);
        }
        public static string Base64Decode(string base64EncodedData)
        {
            var base64EncodedBytes = System.Convert.FromBase64String(base64EncodedData);
            return System.Text.Encoding.UTF8.GetString(base64EncodedBytes);
        }
        public static string UnZipStr(byte[] input)
        {
            using (MemoryStream inputStream = new MemoryStream(input))
            {
                using (zlib.ZInputStream S = new ZInputStream(inputStream))
                {
                    return S.ReadString();
                }
            }
        }
    }
}

the input is a Blueprint string with a single constant combinator in it

Input to program

0eNp9j9EKgzAMRf/lPnewiUzXXxljVA0jYFNp45iI/75WX/a0l8BNTu5NVnTjTFNkUdgV3AdJsPcViV/ixtLTZSJYsJKHgThfVOHUiZ764DsWpyFiM2AZ6AN72R4GJMrKdNjtYnnK7DuKGfhrZDCFlHeDlPzsdzZYcs0BA0fqj0ldQvar7M8TBm+KaQeubVNV1a1u2nrbvu3GTt8=

The output i got

?}??
#`Si???V_????MN?MVt?LSdQ??I???_????e"X????8_T?????;?!b3`?{?$??t??by??;??kd0??w????w6Xr

If this is the wrong place to ask for this stuff then feel free to tell me a more fitting place to post in.

Edit: link to the wiki about the Blueprint string: https://wiki.factorio.com/Blueprint_string_format

[steinio]

If i deflate your blueprint string without the first version sign here (http://www.txtwizard.net/compression) i get the json without base64 decode.

Code: Select all

{
  "blueprint": {
    "icons": [
      {
        "signal": {
          "type": "item",
          "name": "constant-combinator"
        },
        "index": 1
      }
    ],
    "entities": [
      {
        "entity_number": 1,
        "name": "constant-combinator",
        "position": {
          "x": 0,
          "y": 0
        },
        "direction": 4
      }
    ],
    "item": "blueprint",
    "version": 68722294784
  }
}

Cu, steinio.

[The Eriksonn]

Thanks. Is there a way to go the other way in my c# code automatically or do i have to go via the site to fix it up every time?
If so, am i on the right track with my current code(if i reverse it)?

[steinio]

Thanks. Is there a way to go the other way in my c# code automatically or do i have to go via the site to fix it up every time?
If so, am i on the right track with my current code(if i reverse it)?

What i don't understand is, that the blueprint string doesn't need to be decoded with base64 and only needs to be deflated.

Does your code produce the same json, if you skip decoding?

[The Eriksonn]

I really want to encode now since the decoding was only to get the structure of the json text.
However, decoding dont work at all either.

Code: Select all

static void Main(string[] args)
        {
            string path = @"C:\Users\erihor\OneDrive\Visual Studio\ConsoleStuff\Input";
            string line = File.ReadAllText(path);
            var B = ZipStr(line);
            Console.WriteLine(Encoding.UTF8.GetString(B));

            Console.ReadKey();
        }
        public static byte[] ZipStr(String str)
        {
            using (MemoryStream output = new MemoryStream())
            {
                using (DeflateStream gzip =
                  new DeflateStream(output, CompressionMode.Compress))
                {
                    using (StreamWriter writer =
                      new StreamWriter(gzip, System.Text.Encoding.UTF8))
                    {
                        writer.Write(str);
                    }
                }

                return output.ToArray();
            }
        }

Input

{
  "blueprint": {
    "icons": [
      {
        "signal": {
          "type": "item",
          "name": "constant-combinator"
        },
        "index": 1
      }
    ],
    "entities": [
      {
        "entity_number": 1,
        "name": "constant-combinator",
        "position": {
          "x": 0,
          "y": 0
        },
        "direction": 4
      }
    ],
    "item": "blueprint",
    "version": 68722294784
  }
}

Output

?R[
?0?/???Z?j{?R???,?F?X*??J?H^?I*?To|dfvvw???T?M?|??I???au??????W+???0???A?dl7#?0?"?W???1?"?Pq??K? ???K{?\?_o?2?P!????;Y?4??`i?)}???Bxf??\h?!W?????k?K?>?e?I??????u????6??

[The Eriksonn]

Update: i got it to compress by doing base64 decoding but factorio dont accept it even when i add the 0 in front.

Code: Select all

static void Main(string[] args)
        {
            string path = @"C:\Users\erihor\OneDrive\Visual Studio\ConsoleStuff\Input";
            string line = File.ReadAllText(path);
            var B = ZipStr(line);
            Console.WriteLine(Convert.ToBase64String(B));

            Console.ReadKey();
        }
        public static byte[] ZipStr(String str)
        {
            using (MemoryStream output = new MemoryStream())
            {
                using (DeflateStream gzip =
                  new DeflateStream(output, CompressionMode.Compress))
                {
                    using (StreamWriter writer =
                      new StreamWriter(gzip, System.Text.Encoding.UTF8))
                    {
                        writer.Write(str);
                    }
                }

                return output.ToArray();
            }
        }

Output

fY5BCsIwEEXv8tcRtNhachURSesgA82kpKNYSk7mwiN5BZO6ceVm4A9v3vz387WgG240RhaFXcB9kAn2uGDiq7ih7HQeCRas5GEgzpdUOHWimz74jsVpiEgGLBd6wO7SyYBEWZm+ujXMZ7n5jmIG/ooMxjDl2yDlf/ZtDeY8U9GuPexPbYM7xWmFm/ZQVfuqbusmpQ8=

[fenton]

Thanks for the code.

[The Eriksonn]

That code does not work, use this instead:

Code: Select all

//using zlib;

public static string Decode(string base64)

        {

            if (string.IsNullOrWhiteSpace(base64)) return "";

            var enc = new UTF8Encoding();

            return enc.GetString(Decompress(Convert.FromBase64String(base64.Substring(1))));

        }



        public static string Encode(string json)

        {

            var enc = new UTF8Encoding();

            return "0" + Convert.ToBase64String(Compress(enc.GetBytes(json)));

        }



        private static byte[] Compress(byte[] inData)

        {

            using (MemoryStream outMemoryStream = new MemoryStream())

            using (ZOutputStream outZStream = new ZOutputStream(outMemoryStream, zlibConst.Z_DEFAULT_COMPRESSION))

            using (Stream inMemoryStream = new MemoryStream(inData))

            {

                CopyStream(inMemoryStream, outZStream);

                outZStream.finish();

                return outMemoryStream.ToArray();

            }

        }
        private static void CopyStream(System.IO.Stream input, System.IO.Stream output)

        {

            byte[] buffer = new byte[2000];

            int len;

            while ((len = input.Read(buffer, 0, 2000)) > 0)

            {

                output.Write(buffer, 0, len);

            }

            output.Flush();

        }


        private static byte[] Decompress(byte[] inData)

        {

            using (MemoryStream outMemoryStream = new MemoryStream())

            using (ZOutputStream outZStream = new ZOutputStream(outMemoryStream))

            using (Stream inMemoryStream = new MemoryStream(inData))

            {

                CopyStream(inMemoryStream, outZStream);

                outZStream.finish();

                return outMemoryStream.ToArray();

            }

        }