Initial commit
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Natalia Cholewa
203
Program.cs
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203
Program.cs
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using System;
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using System.Collections.Generic;
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using System.Threading.Tasks;
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using System.IO.Compression;
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using System.IO;
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using System.Net.Http;
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using Newtonsoft.Json.Linq;
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using System.Diagnostics;
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namespace McAssetDownloader
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{
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class Program
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{
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static async Task Main(string[] args)
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{
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var dm = new DownloadHelper();
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if (args.Length != 2 || args[0].Equals("help", StringComparison.OrdinalIgnoreCase))
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{
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Console.WriteLine("Usage: McAssetDownloader.exe [version, e.g. 1.16.3] [target zip path]");
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Console.WriteLine("Note: Versions below 1.7.3 will not work due to a different asset format");
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Console.WriteLine();
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Console.WriteLine("https://github.com/natanalt/mcassetdownloader <3");
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return;
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}
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var versionName = args[0];
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var archiveName = args[1];
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if (File.Exists(archiveName))
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{
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Console.Write($"File {archiveName} already exists. Overwrite it? [Y/N] ");
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var key = Console.ReadKey();
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Console.WriteLine();
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if (key.Key != ConsoleKey.Y)
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{
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Console.WriteLine("Aborting.");
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return;
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}
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}
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await dm.RetrieveVersionData();
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var version = dm.CachedVersions.Find(x => x.Id == versionName);
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if (version == null)
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{
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Console.WriteLine($"Version {versionName} not found");
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return;
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}
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using var client = new HttpClient();
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using var targetArchive = new ZipArchive(
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new FileStream(
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archiveName,
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FileMode.Create,
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FileAccess.ReadWrite),
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ZipArchiveMode.Create);
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var meta = await dm.GetVersionMeta(versionName);
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var assets = await dm.GetAssetIndexFor(meta);
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Console.WriteLine("Retrieving client jar...");
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using var clientRequest = await client.GetAsync(meta["downloads"]["client"].Value<string>("url"));
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clientRequest.EnsureSuccessStatusCode();
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using var clientStream = await clientRequest.Content.ReadAsStreamAsync();
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using var clientArchive = new ZipArchive(clientStream, ZipArchiveMode.Read);
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var readTotal = 0;
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var totalFiles = assets.Count;
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foreach (var entry in clientArchive.Entries)
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{
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var name = entry.FullName;
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if (name != "assets/.mcassetsroot" && name.StartsWith("assets/"))
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totalFiles += 1;
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}
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totalFiles += 1; // pack.png
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var stopwatch = new Stopwatch();
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stopwatch.Start();
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void WriteStatus(string filename)
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{
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var percentage = (float)readTotal / totalFiles * 100;
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Console.ForegroundColor = ConsoleColor.White;
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Console.Write($"[{readTotal + 1}/{totalFiles} {(int)percentage}%] ");
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Console.ForegroundColor = ConsoleColor.Gray;
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Console.WriteLine($"Writing {filename}");
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readTotal += 1;
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}
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foreach (var kv in assets)
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{
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var path = kv.Key == "pack.mcmeta" ? kv.Key : $"assets/{kv.Key}";
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WriteStatus(path);
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using var stream = targetArchive.CreateEntry(path).Open();
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using var request = await client.GetAsync(dm.GetAssetUri(kv.Value));
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request.EnsureSuccessStatusCode();
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await request.Content.CopyToAsync(stream);
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}
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WriteStatus("pack.png");
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using (var stream = targetArchive.CreateEntry("pack.png").Open())
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await clientArchive.GetEntry("pack.png").Open().CopyToAsync(stream);
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foreach (var entry in clientArchive.Entries)
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{
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var name = entry.FullName;
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if (name == "assets/.mcassetsroot" || !name.StartsWith("assets/"))
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continue;
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WriteStatus(name);
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using (var stream = targetArchive.CreateEntry(name).Open())
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await clientArchive.GetEntry(name).Open().CopyToAsync(stream);
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}
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Console.WriteLine($"Done! Took {(int)stopwatch.Elapsed.TotalSeconds} seconds");
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}
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}
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class VersionInfo
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{
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public string Id;
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public string Type;
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public Uri MetaUri;
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public DateTime Time;
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public DateTime ReleaseTime;
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}
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class DownloadHelper
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{
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public Uri VersionManifestUri { get; protected set; }
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public List<VersionInfo> CachedVersions { get; protected set; }
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public DownloadHelper(Uri versionManifestUri = null)
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{
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VersionManifestUri = versionManifestUri
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?? new Uri("https://launchermeta.mojang.com/mc/game/version_manifest.json");
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CachedVersions = new List<VersionInfo>();
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}
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public async Task RetrieveVersionData()
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{
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using var client = new HttpClient();
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Console.WriteLine("Retrieving version data... Version manifest URI:");
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Console.WriteLine(VersionManifestUri);
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using var request = await client.GetAsync(VersionManifestUri);
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request.EnsureSuccessStatusCode();
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var contentBody = await request.Content.ReadAsStringAsync();
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CachedVersions.Clear();
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foreach (var entry in JObject.Parse(contentBody).Value<JArray>("versions"))
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{
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CachedVersions.Add(new VersionInfo
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{
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Id = entry.Value<string>("id"),
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Type = entry.Value<string>("type"),
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MetaUri = new Uri(entry.Value<string>("url")),
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Time = DateTime.Parse(entry.Value<string>("time")),
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ReleaseTime = DateTime.Parse(entry.Value<string>("releaseTime")),
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});
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}
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}
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public async Task<JObject> GetVersionMeta(string versionId)
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{
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using var client = new HttpClient();
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using var metaRequest = await client.GetAsync(CachedVersions.Find(x => x.Id == versionId).MetaUri);
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metaRequest.EnsureSuccessStatusCode();
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return JObject.Parse(await metaRequest.Content.ReadAsStringAsync());
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}
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public async Task<Dictionary<string, string>> GetAssetIndexFor(JObject meta)
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{
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var versionId = meta.Value<string>("id");
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Console.WriteLine($"Retrieving asset index URI for version {versionId}");
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if (meta.Value<string>("assets") == "pre-1.6" || meta.Value<string>("assets") == "legacy")
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{
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Console.WriteLine($"Legacy or pre-1.6 asset index for version {versionId} detected.");
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Console.WriteLine($"Legacy asset formats aren't supported by McAssetDownloader");
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return null;
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}
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var totalSize = meta["assetIndex"].Value<int>("totalSize");
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Console.WriteLine($"Found asset index - total assets size: {totalSize / 1024} KiB");
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using var client = new HttpClient();
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using var indexRequest = await client.GetAsync(meta["assetIndex"].Value<string>("url"));
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indexRequest.EnsureSuccessStatusCode();
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var result = new Dictionary<string, string>();
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var index = JObject.Parse(await indexRequest.Content.ReadAsStringAsync()).Value<JObject>("objects");
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foreach (var kv in index)
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result[kv.Key] = kv.Value.Value<string>("hash");
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return result;
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}
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public Uri GetAssetUri(string hash) => new Uri($"http://resources.download.minecraft.net/{hash.Substring(0, 2)}/{hash}");
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}
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}
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