Refactor WebsocketHandler into a standalone class file
This commit is contained in:
@@ -10,21 +10,7 @@ import io.undertow.server.session.Session
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import io.undertow.server.session.SessionCookieConfig
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import io.undertow.server.session.SessionManager
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import io.undertow.util.Headers
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import io.undertow.websockets.WebSocketConnectionCallback
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import io.undertow.websockets.core.AbstractReceiveListener
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import io.undertow.websockets.core.BufferedBinaryMessage
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import io.undertow.websockets.core.BufferedTextMessage
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import io.undertow.websockets.core.WebSocketChannel
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import io.undertow.websockets.core.WebSockets
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import io.undertow.websockets.spi.WebSocketHttpExchange
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import nl.astraeus.vst.base.Settings
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import nl.astraeus.vst.base.db.Database
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import nl.astraeus.vst.base.db.PatchDao
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import nl.astraeus.vst.base.db.PatchEntity
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import java.io.File
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import java.nio.ByteBuffer
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import java.nio.file.Paths
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import java.security.MessageDigest
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object VstSessionConfig {
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val config = SessionCookieConfig()
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@@ -34,152 +20,6 @@ object VstSessionConfig {
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}
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}
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class WebsocketHandler(
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val session: Session?
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) : AbstractReceiveListener(), WebSocketConnectionCallback {
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companion object {
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// Ensure the data directory exists
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private val dataDir = File(Settings.dataDir).apply {
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if (!exists()) {
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mkdirs()
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}
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}
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fun fileExists(hash: String): Boolean {
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check(hash.length == 64) { "Hash must be 64 characters long" }
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var currentDir = dataDir
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var remaining = hash
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while(remaining.length > 8) {
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val subDir = remaining.substring(0, 8)
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currentDir = File(currentDir, subDir)
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if (!currentDir.exists()) {
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return false
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}
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remaining = remaining.substring(8)
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}
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return File(currentDir, remaining).exists()
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}
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// Get file from hash, using subdirectories based on hash
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fun getFileFromHash(hash: String): File {
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check(hash.length == 64) { "Hash must be 64 characters long" }
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var currentDir = dataDir
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var remaining = hash
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while(remaining.length > 8) {
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val subDir = remaining.substring(0, 8)
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currentDir = File(currentDir, subDir)
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if (!currentDir.exists()) {
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currentDir.mkdirs()
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}
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remaining = remaining.substring(8)
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}
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return File(currentDir, remaining)
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}
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// Create SHA-1 hash from binary data
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fun createHashFromBytes(bytes: ByteArray): String {
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val md = MessageDigest.getInstance("SHA-256")
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val digest = md.digest(bytes)
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return digest.joinToString("") { "%02x".format(it) }
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}
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}
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override fun onConnect(exchange: WebSocketHttpExchange, channel: WebSocketChannel) {
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channel.receiveSetter.set(this)
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channel.resumeReceives()
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}
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override fun onFullTextMessage(channel: WebSocketChannel, message: BufferedTextMessage) {
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val vstSession = session?.getAttribute("html-session") as? VstSession
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val data = message.data
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val commandLength = data.indexOf('\n')
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if (commandLength > 0) {
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val command = data.substring(0, commandLength)
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val value = data.substring(commandLength + 1)
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when (command) {
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"SAVE" -> {
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val patchId = vstSession?.patchId
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if (patchId != null) {
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Database.transaction {
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val patchEntity = PatchDao.findById(patchId)
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if (patchEntity != null) {
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PatchDao.update(patchEntity.copy(patch = value))
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} else {
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PatchDao.insert(PatchEntity(0, patchId, value))
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}
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}
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WebSockets.sendText("SAVED\n$patchId", channel, null)
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}
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}
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"LOAD" -> {
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val patchId = vstSession?.patchId
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if (patchId != null) {
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Database.transaction {
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val patchEntity = PatchDao.findById(patchId)
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if (patchEntity != null) {
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WebSockets.sendText("LOAD\n${patchEntity.patch}", channel, null)
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}
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}
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}
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}
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"LOAD_BINARY" -> {
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val hash = value.trim()
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if (hash.isNotEmpty()) {
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if (fileExists(hash)) {
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val file = getFileFromHash(hash)
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if (file.exists() && file.isFile) {
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val bytes = file.readBytes()
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WebSockets.sendBinary(ByteBuffer.wrap(bytes), channel, null)
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}
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}
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}
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}
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}
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}
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}
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override fun onFullBinaryMessage(channel: WebSocketChannel?, message: BufferedBinaryMessage?) {
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// Process binary message: create hash from binary, save file in data/files/ directory,
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// sub directories are 5 characters of the hash per directory
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if (channel != null && message != null) {
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try {
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// Get the binary data
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val pooled = message.data
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val buffer = pooled.resource[0] // Get the first ByteBuffer
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// Convert ByteBuffer to ByteArray
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val bytes = ByteArray(buffer.remaining())
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buffer.get(bytes)
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// Free the pooled resource
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pooled.free()
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// Create hash from binary data
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val hash = createHashFromBytes(bytes)
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// Save file in data/files/ directory with subdirectories
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val file = getFileFromHash(hash)
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file.writeBytes(bytes)
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// Send the hash back to the client
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WebSockets.sendText("BINARY_SAVED\n$hash", channel, null)
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} catch (e: Exception) {
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WebSockets.sendText("ERROR\n${e.message}", channel, null)
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}
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}
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}
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}
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object WebsocketConnectHandler : HttpHandler {
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override fun handleRequest(exchange: HttpServerExchange) {
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164
src/jvmMain/kotlin/nl/astraeus/vst/base/web/WebsocketHandler.kt
Normal file
164
src/jvmMain/kotlin/nl/astraeus/vst/base/web/WebsocketHandler.kt
Normal file
@@ -0,0 +1,164 @@
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package nl.astraeus.vst.base.web
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import io.undertow.server.session.Session
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import io.undertow.websockets.WebSocketConnectionCallback
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import io.undertow.websockets.core.AbstractReceiveListener
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import io.undertow.websockets.core.BufferedBinaryMessage
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import io.undertow.websockets.core.BufferedTextMessage
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import io.undertow.websockets.core.WebSocketChannel
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import io.undertow.websockets.core.WebSockets
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import io.undertow.websockets.spi.WebSocketHttpExchange
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import nl.astraeus.vst.base.Settings
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import nl.astraeus.vst.base.db.Database
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import nl.astraeus.vst.base.db.PatchDao
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import nl.astraeus.vst.base.db.PatchEntity
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import java.io.File
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import java.nio.ByteBuffer
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import java.security.MessageDigest
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class WebsocketHandler(
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val session: Session?
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) : AbstractReceiveListener(), WebSocketConnectionCallback {
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companion object {
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// Ensure the data directory exists
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private val dataDir = File(Settings.dataDir).apply {
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if (!exists()) {
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mkdirs()
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}
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}
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fun fileExists(hash: String): Boolean {
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check(hash.length == 64) { "Hash must be 64 characters long" }
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var currentDir = dataDir
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var remaining = hash
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while(remaining.length > 8) {
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val subDir = remaining.substring(0, 8)
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currentDir = File(currentDir, subDir)
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if (!currentDir.exists()) {
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return false
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}
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remaining = remaining.substring(8)
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}
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return File(currentDir, remaining).exists()
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}
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// Get file from hash, using subdirectories based on hash
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fun getFileFromHash(hash: String): File {
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check(hash.length == 64) { "Hash must be 64 characters long" }
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var currentDir = dataDir
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var remaining = hash
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while(remaining.length > 8) {
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val subDir = remaining.substring(0, 8)
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currentDir = File(currentDir, subDir)
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if (!currentDir.exists()) {
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currentDir.mkdirs()
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}
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remaining = remaining.substring(8)
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}
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return File(currentDir, remaining)
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}
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// Create SHA-1 hash from binary data
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fun createHashFromBytes(bytes: ByteArray): String {
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val md = MessageDigest.getInstance("SHA-256")
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val digest = md.digest(bytes)
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return digest.joinToString("") { "%02x".format(it) }
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}
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}
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override fun onConnect(exchange: WebSocketHttpExchange, channel: WebSocketChannel) {
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channel.receiveSetter.set(this)
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channel.resumeReceives()
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}
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override fun onFullTextMessage(channel: WebSocketChannel, message: BufferedTextMessage) {
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val vstSession = session?.getAttribute("html-session") as? VstSession
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val data = message.data
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val commandLength = data.indexOf('\n')
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if (commandLength > 0) {
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val command = data.substring(0, commandLength)
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val value = data.substring(commandLength + 1)
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when (command) {
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"SAVE" -> {
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val patchId = vstSession?.patchId
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if (patchId != null) {
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Database.transaction {
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val patchEntity = PatchDao.findById(patchId)
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if (patchEntity != null) {
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PatchDao.update(patchEntity.copy(patch = value))
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} else {
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PatchDao.insert(PatchEntity(0, patchId, value))
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}
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}
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WebSockets.sendText("SAVED\n$patchId", channel, null)
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}
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}
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"LOAD" -> {
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val patchId = vstSession?.patchId
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if (patchId != null) {
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Database.transaction {
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val patchEntity = PatchDao.findById(patchId)
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if (patchEntity != null) {
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WebSockets.sendText("LOAD\n${patchEntity.patch}", channel, null)
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}
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}
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}
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}
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"LOAD_BINARY" -> {
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val hash = value.trim()
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if (hash.isNotEmpty()) {
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if (fileExists(hash)) {
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val file = getFileFromHash(hash)
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if (file.exists() && file.isFile) {
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val bytes = file.readBytes()
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WebSockets.sendBinary(ByteBuffer.wrap(bytes), channel, null)
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}
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}
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}
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}
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}
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}
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}
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override fun onFullBinaryMessage(channel: WebSocketChannel?, message: BufferedBinaryMessage?) {
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// Process binary message: create hash from binary, save file in data/files/ directory,
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// sub directories are 5 characters of the hash per directory
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if (channel != null && message != null) {
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try {
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// Get the binary data
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val pooled = message.data
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val buffer = pooled.resource[0] // Get the first ByteBuffer
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// Convert ByteBuffer to ByteArray
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val bytes = ByteArray(buffer.remaining())
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buffer.get(bytes)
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// Free the pooled resource
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pooled.free()
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// Create hash from binary data
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val hash = createHashFromBytes(bytes)
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// Save file in data/files/ directory with subdirectories
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val file = getFileFromHash(hash)
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file.writeBytes(bytes)
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// Send the hash back to the client
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WebSockets.sendText("BINARY_SAVED\n$hash", channel, null)
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} catch (e: Exception) {
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WebSockets.sendText("ERROR\n${e.message}", channel, null)
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}
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}
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}
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}
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