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| 1 | +package pl.syntaxdevteam.syntaxlauncher.core.loader |
| 2 | + |
| 3 | +import io.ktor.client.HttpClient |
| 4 | +import io.ktor.client.request.get |
| 5 | +import io.ktor.client.statement.bodyAsText |
| 6 | +import io.ktor.http.isSuccess |
| 7 | +import pl.syntaxdevteam.syntaxlauncher.core.minecraft.ResolvedMinecraftVersion |
| 8 | + |
| 9 | +/** Parse Maven version tags without XML entities, external DTDs or arbitrary URLs. */ |
| 10 | +internal object InstallerMavenVersions { |
| 11 | + private val versionTag = Regex("<version>\\s*([^<>\\s]{1,120})\\s*</version>") |
| 12 | + fun parse(xml: String): List<String> { |
| 13 | + require(xml.length <= 4_000_000 && !xml.contains("<!DOCTYPE", ignoreCase = true) && |
| 14 | + !xml.contains("<!ENTITY", ignoreCase = true)) { "Unsafe Maven metadata." } |
| 15 | + return versionTag.findAll(xml).map { it.groupValues[1] } |
| 16 | + .filter { it.matches(Regex("[A-Za-z0-9][A-Za-z0-9._+~-]{0,119}")) } |
| 17 | + .distinct().toList() |
| 18 | + } |
| 19 | +} |
| 20 | + |
| 21 | +/** The Forge-family installer pipeline is not yet implemented; fail closed on resolve. */ |
| 22 | +abstract class InstallerBackedLoaderProvider( |
| 23 | + protected val http: HttpClient, |
| 24 | + private val metadataUrl: String, |
| 25 | +) : ModLoaderProvider { |
| 26 | + override suspend fun resolve(base: ResolvedMinecraftVersion, version: String): ResolvedMinecraftVersion { |
| 27 | + ModLoaderSelection(id, version) |
| 28 | + if (compatibleVersions(base.id).none { it.version == version }) { |
| 29 | + throw IncompatibleModLoaderException(id + " " + version + " is unavailable for " + base.id) |
| 30 | + } |
| 31 | + throw ModLoaderException( |
| 32 | + id + " requires its official installer processors and generated libraries. " + |
| 33 | + "It cannot be launched by SyntaxLauncher yet." |
| 34 | + ) |
| 35 | + } |
| 36 | + protected suspend fun metadata(): List<String> { |
| 37 | + val response = http.get(metadataUrl) |
| 38 | + if (!response.status.isSuccess()) { |
| 39 | + throw ModLoaderException(id + " Maven metadata HTTP " + response.status.value) |
| 40 | + } |
| 41 | + return InstallerMavenVersions.parse(response.bodyAsText()) |
| 42 | + } |
| 43 | +} |
| 44 | + |
| 45 | +class NeoForgeLoaderProvider(http: HttpClient) : InstallerBackedLoaderProvider( |
| 46 | + http, "https://maven.neoforged.net/releases/net/neoforged/neoforge/maven-metadata.xml", |
| 47 | +) { |
| 48 | + override val id = "neoforge" |
| 49 | + override suspend fun compatibleVersions(minecraftVersionId: String): List<ModLoaderVersion> { |
| 50 | + require(minecraftVersionId.matches(Regex("[A-Za-z0-9._-]{1,80}"))) |
| 51 | + val parts = minecraftVersionId.split('.') |
| 52 | + val prefix = when { |
| 53 | + parts.size >= 3 && parts[0] == "1" -> parts[1] + "." + parts[2] + "." |
| 54 | + parts.size >= 2 && parts[0].toIntOrNull() != null -> minecraftVersionId + "." |
| 55 | + else -> return emptyList() |
| 56 | + } |
| 57 | + return metadata().asReversed().filter { it.startsWith(prefix) }.map { |
| 58 | + ModLoaderVersion(it, !it.contains('-')) |
| 59 | + } |
| 60 | + } |
| 61 | +} |
| 62 | + |
| 63 | +class ForgeLoaderProvider(http: HttpClient) : InstallerBackedLoaderProvider( |
| 64 | + http, "https://maven.minecraftforge.net/net/minecraftforge/forge/maven-metadata.xml", |
| 65 | +) { |
| 66 | + override val id = "forge" |
| 67 | + override suspend fun compatibleVersions(minecraftVersionId: String): List<ModLoaderVersion> { |
| 68 | + require(minecraftVersionId.matches(Regex("[A-Za-z0-9._-]{1,80}"))) |
| 69 | + val prefix = minecraftVersionId + "-" |
| 70 | + return metadata().asReversed().filter { it.startsWith(prefix) }.map { |
| 71 | + ModLoaderVersion(it.removePrefix(prefix), !it.contains("beta", ignoreCase = true)) |
| 72 | + } |
| 73 | + } |
| 74 | +} |
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