CLI implementation & linting
Test Workflow / Lint and test library (pull_request) Successful in 8m18s
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Test Workflow / Lint and test library (pull_request) Successful in 8m18s
Details
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[{*.yaml,*.yml}]
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[{*.kt,*.kts}]
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ij_kotlin_packages_to_use_import_on_demand = org.junit.jupiter.api,aws.sdk.kotlin.services.s3,kotlinx.coroutines,java.io,ziputils
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58
README.md
58
README.md
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@ -6,6 +6,64 @@ an AWS S3 bucket.
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This tool is released as a JAR in the [release page](https://git.koval.net/cyclane/teamcity-executors-test-task/releases).
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Use `java -jar <backup-jar-name>.jar --help` for more detailed usage instructions.
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### --help
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```
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Usage: s3backup-tool [<options>] <command> [<args>]...
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A simple AWS S3 backup tool. This tool assumes credentials are properly configured using aws-cli.
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Options:
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-h, --help Show this message and exit
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Commands:
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create Create a backup of a file or directory.
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restore Restore a backup from AWS S3.
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restore-file Restore a single file from a backup from AWS S3.
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```
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#### Subcommands
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```
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Usage: s3backup-tool create [<options>] <source> <bucket>
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Create a backup of a file or directory.
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Options:
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-h, --help Show this message and exit
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Arguments:
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<source> File or directory to backup
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<bucket> Name of S3 bucket to backup to
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```
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```
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Usage: s3backup-tool restore [<options>] <bucket> <backupkey> <destination>
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Restore a backup from AWS S3.
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Options:
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-h, --help Show this message and exit
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Arguments:
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<bucket> Name of S3 bucket to restore the backup from
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<backupkey> The S3 key of the backup to restore
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<destination> Directory to restore to
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```
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```
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Usage: s3backup-tool restore-file [<options>] <bucket> <backupkey> <filepath> <destination>
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Restore a single file from a backup from AWS S3.
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Options:
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-h, --help Show this message and exit
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Arguments:
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<bucket> Name of S3 bucket to restore the backup from
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<backupkey> The S3 key of the backup to restore
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<filepath> File path within the backup
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<destination> Directory to restore to
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```
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## Assumptions
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1. This test task is not interested in re-implementations of common libraries (AWS SDK, Clikt, Gradle Shadow, ...)
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2. The last part (restoration of a single file) should be optimised so that only the part of the blob required for this
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@ -1,7 +1,7 @@
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import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar
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plugins {
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application
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kotlin("jvm") version "1.9.21"
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id("org.jlleitschuh.gradle.ktlint") version "12.0.3"
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id("com.github.johnrengelman.shadow") version "8.1.1"
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}
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@ -16,6 +16,7 @@ dependencies {
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implementation("aws.sdk.kotlin:s3:1.0.25")
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implementation("org.slf4j:slf4j-simple:2.0.9")
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implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.7.3")
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implementation("com.github.ajalt.clikt:clikt:4.2.1")
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testImplementation("org.jetbrains.kotlin:kotlin-test")
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}
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@ -25,8 +26,6 @@ tasks.test {
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kotlin {
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jvmToolchain(17)
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}
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tasks.jar {
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manifest {
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attributes("Main-Class" to "backup.MainKt")
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}
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application {
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mainClass.set("MainKt")
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}
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@ -2,4 +2,3 @@ plugins {
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id("org.gradle.toolchains.foojay-resolver-convention") version "0.5.0"
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}
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rootProject.name = "teamcity-executors-test-task"
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@ -0,0 +1,80 @@
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import aws.sdk.kotlin.services.s3.S3Client
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import backup.BackupClient
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import com.github.ajalt.clikt.core.CliktCommand
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import com.github.ajalt.clikt.core.subcommands
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import com.github.ajalt.clikt.parameters.arguments.argument
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import com.github.ajalt.clikt.parameters.arguments.help
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import com.github.ajalt.clikt.parameters.types.file
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import kotlinx.coroutines.runBlocking
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import kotlin.system.exitProcess
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fun main(args: Array<String>) =
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runBlocking {
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S3Client.fromEnvironment().use { s3 ->
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S3BackupTool()
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.subcommands(
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Create(s3),
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Restore(s3),
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RestoreFile(s3),
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)
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.main(args)
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}
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}
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class S3BackupTool : CliktCommand(
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help = "A simple AWS S3 backup tool. This tool assumes credentials are properly configured using aws-cli.",
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) {
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override fun run() {
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shortHelp(currentContext)
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}
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}
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class Create(val s3: S3Client) : CliktCommand(
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help = "Create a backup of a file or directory.",
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) {
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val source by argument().file(mustExist = true).help("File or directory to backup")
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val bucket by argument().help("Name of S3 bucket to backup to")
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override fun run() =
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runBlocking {
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val backupKey = BackupClient(s3, bucket).upload(source)
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echo("Successfully created backup with key '$backupKey'")
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}
|
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}
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class Restore(val s3: S3Client) : CliktCommand(
|
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help = "Restore a backup from AWS S3.",
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) {
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val bucket by argument().help("Name of S3 bucket to restore the backup from")
|
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val backupKey by argument().help("The S3 key of the backup to restore")
|
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val destination by argument().file(mustExist = true).help("Directory to restore to")
|
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|
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override fun run() =
|
||||
runBlocking {
|
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if (!destination.isDirectory) {
|
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echo("Destination must be an existing directory", err = true)
|
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exitProcess(1)
|
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}
|
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BackupClient(s3, bucket).restore(destination.toPath(), backupKey)
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echo("Successfully restored backup '$backupKey' to '$destination'")
|
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}
|
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}
|
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|
||||
class RestoreFile(val s3: S3Client) : CliktCommand(
|
||||
help = "Restore a single file from a backup from AWS S3.",
|
||||
) {
|
||||
val bucket by argument().help("Name of S3 bucket to restore the backup from")
|
||||
val backupKey by argument().help("The S3 key of the backup to restore")
|
||||
val filePath by argument().help("File path within the backup")
|
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val destination by argument().file(mustExist = true).help("Directory to restore to")
|
||||
|
||||
override fun run() =
|
||||
runBlocking {
|
||||
if (!destination.isDirectory) {
|
||||
echo("Destination must be an existing directory", err = true)
|
||||
exitProcess(1)
|
||||
}
|
||||
BackupClient(s3, bucket).restoreFile(destination.toPath(), backupKey, filePath)
|
||||
echo("Successfully restored '$filePath' from backup '$backupKey' to '$destination'")
|
||||
}
|
||||
}
|
||||
|
|
@ -30,17 +30,19 @@ import kotlin.io.path.createDirectory
|
|||
class BackupClient(
|
||||
private val s3: S3Client,
|
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private val bucketName: String,
|
||||
private val bufSize: Int = 1024 * 1024 * 100
|
||||
private val bufSize: Int = 1024 * 1024 * 32,
|
||||
) {
|
||||
/**
|
||||
* Upload a file/directory backup to AWS S3.
|
||||
* @param file The File object for the file or directory.
|
||||
*/
|
||||
suspend fun upload(file: File) = coroutineScope {
|
||||
val backupKey = "${file.name}/${Instant.now()}.zip"
|
||||
suspend fun upload(file: File) =
|
||||
coroutineScope {
|
||||
val backupKey = "${file.canonicalFile.name}/${Instant.now()}.zip"
|
||||
PipedInputStream().use { inputStream ->
|
||||
val outputStream = PipedOutputStream(inputStream)
|
||||
val zipper = launch(Dispatchers.IO) {
|
||||
val zipper =
|
||||
launch(Dispatchers.IO) {
|
||||
file.compressToZip(outputStream)
|
||||
}
|
||||
|
||||
|
|
@ -50,7 +52,8 @@ class BackupClient(
|
|||
// Large upload, use multipart
|
||||
// TODO: multipart uploads can be asynchronous, which would improve
|
||||
// performance a little bit for big uploads.
|
||||
val upload = s3.createMultipartUpload {
|
||||
val upload =
|
||||
s3.createMultipartUpload {
|
||||
bucket = bucketName
|
||||
key = backupKey
|
||||
}
|
||||
|
|
@ -59,7 +62,8 @@ class BackupClient(
|
|||
var number = 1
|
||||
var bytesRead = initialRead
|
||||
while (bytesRead > 0) {
|
||||
val part = s3.uploadPart {
|
||||
val part =
|
||||
s3.uploadPart {
|
||||
bucket = bucketName
|
||||
key = backupKey
|
||||
partNumber = number
|
||||
|
|
@ -74,7 +78,8 @@ class BackupClient(
|
|||
bucket = bucketName
|
||||
key = backupKey
|
||||
uploadId = upload.uploadId
|
||||
multipartUpload = CompletedMultipartUpload {
|
||||
multipartUpload =
|
||||
CompletedMultipartUpload {
|
||||
parts = uploadParts
|
||||
}
|
||||
}
|
||||
|
|
@ -104,15 +109,19 @@ class BackupClient(
|
|||
* @param destination The destination directory path for the backup contents.
|
||||
* @param backupKey The S3 key of the backup.
|
||||
*/
|
||||
suspend fun restore(destination: Path, backupKey: String) = coroutineScope {
|
||||
val req = GetObjectRequest {
|
||||
suspend fun restore(
|
||||
destination: Path,
|
||||
backupKey: String,
|
||||
) = coroutineScope {
|
||||
val req =
|
||||
GetObjectRequest {
|
||||
bucket = bucketName
|
||||
key = backupKey
|
||||
}
|
||||
s3.getObject(req) { resp ->
|
||||
ZipInputStream(
|
||||
resp.body?.toInputStream()
|
||||
?: throw IOException("S3 response is missing body")
|
||||
?: throw IOException("S3 response is missing body"),
|
||||
).use { zipStream ->
|
||||
zipStream.decompress { destination.resolve(it) }
|
||||
}
|
||||
|
|
@ -125,9 +134,14 @@ class BackupClient(
|
|||
* @param backupKey The S3 key of the backup.
|
||||
* @param fileName The full name of the file to restore (including directories if it was under a subdirectory).
|
||||
*/
|
||||
suspend fun restoreFile(destination: Path, backupKey: String, fileName: String) = coroutineScope {
|
||||
suspend fun restoreFile(
|
||||
destination: Path,
|
||||
backupKey: String,
|
||||
fileName: String,
|
||||
) = coroutineScope {
|
||||
// For byte ranges refer to https://pkware.cachefly.net/webdocs/APPNOTE/APPNOTE-6.3.9.TXT
|
||||
val eocdReq = GetObjectRequest {
|
||||
val eocdReq =
|
||||
GetObjectRequest {
|
||||
bucket = bucketName
|
||||
key = backupKey
|
||||
// Assumption: EOCD has an empty comment
|
||||
|
|
@ -135,14 +149,17 @@ class BackupClient(
|
|||
// in which case this function would error anyway, so it should be fine to have this edge-case.
|
||||
range = "bytes=-${EndOfCentralDirectoryRecord.SIZE + EndOfCentralDirectoryLocator.SIZE}"
|
||||
}
|
||||
val eocdBytes = s3.getObject(eocdReq) { resp ->
|
||||
val eocdBytes =
|
||||
s3.getObject(eocdReq) { resp ->
|
||||
val bytes = resp.body?.toByteArray() ?: throw IOException("S3 response is missing body")
|
||||
bytes
|
||||
}
|
||||
val eocd = EndOfCentralDirectoryRecord.fromByteArray(eocdBytes, EndOfCentralDirectoryLocator.SIZE)
|
||||
val eocd64 = if (eocd.eocd64Required()) {
|
||||
val eocd64 =
|
||||
if (eocd.eocd64Required()) {
|
||||
val locator = EndOfCentralDirectoryLocator.fromByteArray(eocdBytes, 0)
|
||||
val eocd64Req = GetObjectRequest {
|
||||
val eocd64Req =
|
||||
GetObjectRequest {
|
||||
bucket = bucketName
|
||||
key = backupKey
|
||||
range = "bytes=${locator.endOfCentralDirectory64Offset}-"
|
||||
|
|
@ -151,18 +168,25 @@ class BackupClient(
|
|||
val bytes = resp.body?.toByteArray() ?: throw IOException("S3 response is missing body")
|
||||
EndOfCentralDirectoryRecord64.fromByteArray(bytes, 0)
|
||||
}
|
||||
} else null
|
||||
val cenOffset = if (eocd.centralDirectoryOffset == 0xffffffffU && eocd64 != null) {
|
||||
} else {
|
||||
null
|
||||
}
|
||||
val cenOffset =
|
||||
if (eocd.centralDirectoryOffset == 0xffffffffU && eocd64 != null) {
|
||||
eocd64.centralDirectoryOffset
|
||||
} else eocd.centralDirectoryOffset.toULong()
|
||||
val censReq = GetObjectRequest {
|
||||
} else {
|
||||
eocd.centralDirectoryOffset.toULong()
|
||||
}
|
||||
val censReq =
|
||||
GetObjectRequest {
|
||||
bucket = bucketName
|
||||
key = backupKey
|
||||
// We only know where to fetch until if we've also fetched EOCD64 (which isn't always the case).
|
||||
// So just over-fetch a little bit, these headers aren't that big anyway.
|
||||
range = "bytes=${cenOffset}-"
|
||||
range = "bytes=$cenOffset-"
|
||||
}
|
||||
val cen = s3.getObject(censReq) { resp ->
|
||||
val cen =
|
||||
s3.getObject(censReq) { resp ->
|
||||
val bytes = resp.body?.toByteArray() ?: throw IOException("S3 response is missing body")
|
||||
var p = 0
|
||||
while (p < bytes.size) {
|
||||
|
|
@ -170,23 +194,26 @@ class BackupClient(
|
|||
val cen = CentralDirectoryFileHeader.fromByteArray(bytes, p)
|
||||
p += cen.size
|
||||
if (cen.fileName == fileName) return@getObject cen
|
||||
} catch (_: InvalidSignatureException) {
|
||||
} catch (_: InvalidDataException) {
|
||||
return@getObject null
|
||||
}
|
||||
}
|
||||
null
|
||||
} ?: throw FileNotFoundException("File '${fileName}' not found in backup")
|
||||
} ?: throw FileNotFoundException("File '$fileName' not found in backup")
|
||||
|
||||
val localHeaderOffset = cen.extraFieldRecords.firstNotNullOfOrNull {
|
||||
val localHeaderOffset =
|
||||
cen.extraFieldRecords.firstNotNullOfOrNull {
|
||||
if (it is Zip64ExtraFieldRecord && it.localHeaderOffset != null) it else null
|
||||
}?.localHeaderOffset ?: cen.localHeaderOffset.toULong()
|
||||
val compressedSize = cen.extraFieldRecords.firstNotNullOfOrNull {
|
||||
val compressedSize =
|
||||
cen.extraFieldRecords.firstNotNullOfOrNull {
|
||||
if (it is Zip64ExtraFieldRecord && it.compressedSize != null) it else null
|
||||
}?.compressedSize ?: cen.compressedSize.toULong()
|
||||
val req = GetObjectRequest {
|
||||
val req =
|
||||
GetObjectRequest {
|
||||
bucket = bucketName
|
||||
key = backupKey
|
||||
range = "bytes=${localHeaderOffset}-${
|
||||
range = "bytes=$localHeaderOffset-${
|
||||
// Add CEN min size (46 bytes) so that the next CEN / LOC header is seen by the ZipInputStream
|
||||
// and so it can see the current entry has stopped.
|
||||
// Note: yes ZipInputStream should know the exact content length from the LOC, but it was still sending
|
||||
|
|
@ -197,9 +224,9 @@ class BackupClient(
|
|||
s3.getObject(req) { resp ->
|
||||
ZipInputStream(
|
||||
resp.body?.toInputStream()
|
||||
?: throw IOException("S3 response is missing body")
|
||||
?: throw IOException("S3 response is missing body"),
|
||||
).use { zipStream ->
|
||||
zipStream.decompress { name -> destination.resolve(name.takeLastWhile { it != '/' }) }
|
||||
zipStream.decompress(limit = 1) { name -> destination.resolve(name.takeLastWhile { it != '/' }) }
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -228,19 +255,23 @@ private fun UploadPartResponse.toCompletedPart(number: Int): CompletedPart {
|
|||
* @return A ByteArray of the first `n` items.
|
||||
*/
|
||||
private fun ByteArray.take(n: Int) =
|
||||
if (n == size) this // No copy
|
||||
else asList().subList(0, n).toByteArray() // TODO: One copy (toByteArray()), not sure how to do 0 copies here
|
||||
if (n == size) {
|
||||
this // No copy
|
||||
} else {
|
||||
asList().subList(0, n).toByteArray() // TODO: One copy (toByteArray()), not sure how to do 0 copies here
|
||||
}
|
||||
|
||||
/**
|
||||
* Compress a file or directory as a ZIP file to an `OutputStream`.
|
||||
* @param outputStream The `OutputStream` to write the ZIP file contents to.
|
||||
*/
|
||||
private fun File.compressToZip(outputStream: OutputStream) = ZipOutputStream(outputStream).use { zipStream ->
|
||||
val parentDir = this.absoluteFile.parent + "/"
|
||||
private fun File.compressToZip(outputStream: OutputStream) =
|
||||
ZipOutputStream(outputStream).use { zipStream ->
|
||||
val parentDir = this.canonicalFile.parent + "/"
|
||||
val fileQueue = ArrayDeque<File>()
|
||||
fileQueue.add(this)
|
||||
fileQueue.forEach { subFile ->
|
||||
val path = subFile.absolutePath.removePrefix(parentDir)
|
||||
val path = subFile.canonicalPath.removePrefix(parentDir)
|
||||
val subFiles = subFile.listFiles()
|
||||
if (subFiles != null) { // Is a directory
|
||||
val entry = ZipEntry("$path/")
|
||||
|
|
@ -265,9 +296,11 @@ private fun File.compressToZip(outputStream: OutputStream) = ZipOutputStream(out
|
|||
*/
|
||||
private fun ZipInputStream.decompress(
|
||||
bufSize: Int = 1024 * 1024,
|
||||
entryNameToPath: (String) -> Path
|
||||
limit: Int? = null,
|
||||
entryNameToPath: (String) -> Path,
|
||||
) {
|
||||
var entry = this.nextEntry
|
||||
var count = 1
|
||||
while (entry != null) {
|
||||
val path = entryNameToPath(entry.name)
|
||||
if (entry.isDirectory) {
|
||||
|
|
@ -283,6 +316,9 @@ private fun ZipInputStream.decompress(
|
|||
}
|
||||
}
|
||||
applyZipAttributes(entry, path)
|
||||
// This is here, not in while loop, since we do not want to read more from the input stream.
|
||||
// But this.nextEntry will read from the input stream.
|
||||
if (limit != null && count++ >= limit) return
|
||||
entry = this.nextEntry
|
||||
}
|
||||
}
|
||||
|
|
@ -292,7 +328,10 @@ private fun ZipInputStream.decompress(
|
|||
* @param entry The `ZipEntry` to set attributes of.
|
||||
* @param path The `Path` of the file to get the attributes from.
|
||||
*/
|
||||
private fun setZipAttributes(entry: ZipEntry, path: Path) {
|
||||
private fun setZipAttributes(
|
||||
entry: ZipEntry,
|
||||
path: Path,
|
||||
) {
|
||||
try {
|
||||
val attrs = Files.getFileAttributeView(path, BasicFileAttributeView::class.java).readAttributes()
|
||||
entry.setCreationTime(attrs.creationTime())
|
||||
|
|
@ -307,7 +346,10 @@ private fun setZipAttributes(entry: ZipEntry, path: Path) {
|
|||
* @param entry The `ZipEntry` to get the attributes from.
|
||||
* @param path The `Path` of the file to set the attributes of.
|
||||
*/
|
||||
private fun applyZipAttributes(entry: ZipEntry, path: Path) {
|
||||
private fun applyZipAttributes(
|
||||
entry: ZipEntry,
|
||||
path: Path,
|
||||
) {
|
||||
try {
|
||||
val attrs = Files.getFileAttributeView(path, BasicFileAttributeView::class.java)
|
||||
attrs.setTimes(entry.lastModifiedTime, entry.lastAccessTime, entry.creationTime)
|
||||
|
|
|
|||
|
|
@ -1,10 +0,0 @@
|
|||
package backup
|
||||
|
||||
import aws.sdk.kotlin.services.s3.S3Client
|
||||
import kotlinx.coroutines.runBlocking
|
||||
|
||||
fun main() = runBlocking {
|
||||
S3Client.fromEnvironment().use { s3 ->
|
||||
val backupClient = BackupClient(s3, "teamcity-executors-test-task", 1024 * 1024 * 10)
|
||||
}
|
||||
}
|
||||
|
|
@ -15,7 +15,7 @@ internal class CentralDirectoryFileHeader(
|
|||
val disk: UShort,
|
||||
val localHeaderOffset: UInt,
|
||||
val fileName: String,
|
||||
val extraFieldRecords: List<ExtraFieldRecord>
|
||||
val extraFieldRecords: List<ExtraFieldRecord>,
|
||||
) {
|
||||
val size: Int
|
||||
get() = SIZE + nameLength.toInt() + extraFieldLength.toInt() + commentLength.toInt()
|
||||
|
|
@ -32,65 +32,85 @@ internal class CentralDirectoryFileHeader(
|
|||
* @return A `CentralDirectoryFileHeader`.
|
||||
*/
|
||||
@Throws(InvalidDataException::class)
|
||||
fun fromByteArray(data: ByteArray, offset: Int): CentralDirectoryFileHeader {
|
||||
fun fromByteArray(
|
||||
data: ByteArray,
|
||||
offset: Int,
|
||||
): CentralDirectoryFileHeader {
|
||||
if (data.size - offset < SIZE) {
|
||||
throw InvalidDataException("CEN must be at least 46 bytes")
|
||||
}
|
||||
val buf = ByteBuffer.wrap(data, offset, 46).order(ByteOrder.LITTLE_ENDIAN)
|
||||
if (buf.getInt().toUInt() != SIGNATURE) {
|
||||
throw InvalidSignatureException("Invalid signature")
|
||||
throw InvalidDataException("Invalid signature")
|
||||
}
|
||||
|
||||
val extraFieldRecords = mutableListOf<ExtraFieldRecord>()
|
||||
val nameLength = buf.getShort(offset + 28).toUShort()
|
||||
buf.position(offset + 20)
|
||||
val cen = CentralDirectoryFileHeader(
|
||||
val cen =
|
||||
CentralDirectoryFileHeader(
|
||||
compressedSize = buf.getInt().toUInt(),
|
||||
uncompressedSize = buf.getInt().toUInt(),
|
||||
nameLength = nameLength
|
||||
nameLength =
|
||||
nameLength
|
||||
.also { buf.position(offset + 30) },
|
||||
extraFieldLength = buf.getShort().toUShort(),
|
||||
commentLength = buf.getShort().toUShort(),
|
||||
disk = buf.getShort().toUShort()
|
||||
disk =
|
||||
buf.getShort().toUShort()
|
||||
.also { buf.position(offset + 42) },
|
||||
localHeaderOffset = buf.getInt().toUInt(),
|
||||
fileName = String(data.sliceArray(offset + SIZE..<offset + SIZE + nameLength.toInt())),
|
||||
extraFieldRecords = extraFieldRecords
|
||||
extraFieldRecords = extraFieldRecords,
|
||||
)
|
||||
if (data.size - offset < cen.size) {
|
||||
throw InvalidDataException("CEN is too short")
|
||||
}
|
||||
|
||||
// Parse extra field records
|
||||
val extraFieldsBuf = ByteBuffer.wrap(
|
||||
data, offset + SIZE + cen.nameLength.toInt(), cen.extraFieldLength.toInt()
|
||||
val extraFieldsBuf =
|
||||
ByteBuffer.wrap(
|
||||
data,
|
||||
offset + SIZE + cen.nameLength.toInt(),
|
||||
cen.extraFieldLength.toInt(),
|
||||
).order(ByteOrder.LITTLE_ENDIAN)
|
||||
while (extraFieldsBuf.remaining() > 0) {
|
||||
val id = extraFieldsBuf.getShort().toUShort()
|
||||
val size = extraFieldsBuf.getShort().toUShort()
|
||||
extraFieldRecords.add(when (id) {
|
||||
extraFieldRecords.add(
|
||||
when (id) {
|
||||
Zip64ExtraFieldRecord.ID -> {
|
||||
Zip64ExtraFieldRecord(
|
||||
size,
|
||||
if (cen.uncompressedSize == 0xffffffffU) {
|
||||
extraFieldsBuf.getLong().toULong()
|
||||
} else null,
|
||||
} else {
|
||||
null
|
||||
},
|
||||
if (cen.compressedSize == 0xffffffffU) {
|
||||
extraFieldsBuf.getLong().toULong()
|
||||
} else null,
|
||||
} else {
|
||||
null
|
||||
},
|
||||
if (cen.localHeaderOffset == 0xffffffffU) {
|
||||
extraFieldsBuf.getLong().toULong()
|
||||
} else null,
|
||||
} else {
|
||||
null
|
||||
},
|
||||
if (cen.disk == 0xffffU.toUShort()) {
|
||||
extraFieldsBuf.getInt().toUInt()
|
||||
} else null
|
||||
} else {
|
||||
null
|
||||
},
|
||||
)
|
||||
}
|
||||
|
||||
else -> {
|
||||
extraFieldsBuf.position(extraFieldsBuf.position() + size.toInt())
|
||||
ExtraFieldRecord(id, size)
|
||||
}
|
||||
})
|
||||
},
|
||||
)
|
||||
}
|
||||
|
||||
return cen
|
||||
|
|
|
|||
|
|
@ -7,11 +7,12 @@ import java.nio.ByteOrder
|
|||
* Represents a partial ZIP64 end of central directory locator.
|
||||
*/
|
||||
internal class EndOfCentralDirectoryLocator(
|
||||
val endOfCentralDirectory64Offset: ULong
|
||||
val endOfCentralDirectory64Offset: ULong,
|
||||
) {
|
||||
companion object {
|
||||
const val SIGNATURE = 0x07064b50U
|
||||
const val SIZE = 20
|
||||
|
||||
/**
|
||||
* Create `EndOfCentralDirectoryLocator` from raw byte data.
|
||||
* @throws InvalidDataException Provided `ByteArray` is not a supported EOCD locator.
|
||||
|
|
@ -20,13 +21,16 @@ internal class EndOfCentralDirectoryLocator(
|
|||
* @return A `EndOfCentralDirectoryLocator`.
|
||||
*/
|
||||
@Throws(InvalidDataException::class)
|
||||
fun fromByteArray(data: ByteArray, offset: Int): EndOfCentralDirectoryLocator {
|
||||
fun fromByteArray(
|
||||
data: ByteArray,
|
||||
offset: Int,
|
||||
): EndOfCentralDirectoryLocator {
|
||||
if (data.size - offset < SIZE) {
|
||||
throw InvalidDataException("EOCD64 locator must be at least 20 bytes")
|
||||
}
|
||||
val buf = ByteBuffer.wrap(data, offset, SIZE).order(ByteOrder.LITTLE_ENDIAN)
|
||||
if (buf.getInt().toUInt() != SIGNATURE) {
|
||||
throw InvalidSignatureException("Invalid signature")
|
||||
throw InvalidDataException("Invalid signature")
|
||||
}
|
||||
buf.position(offset + 8)
|
||||
return EndOfCentralDirectoryLocator(buf.getLong().toULong())
|
||||
|
|
|
|||
|
|
@ -7,14 +7,14 @@ import java.nio.ByteOrder
|
|||
* Represents a partial ZIP end of central directory record.
|
||||
*/
|
||||
internal class EndOfCentralDirectoryRecord(
|
||||
val centralDirectoryOffset: UInt
|
||||
val centralDirectoryOffset: UInt,
|
||||
) {
|
||||
fun eocd64Required(): Boolean =
|
||||
centralDirectoryOffset == 0xffffffffU
|
||||
fun eocd64Required(): Boolean = centralDirectoryOffset == 0xffffffffU
|
||||
|
||||
companion object {
|
||||
const val SIGNATURE = 0x06054b50U
|
||||
const val SIZE = 22
|
||||
|
||||
/**
|
||||
* Create `EndOfCentralDirectoryRecord` from raw byte data.
|
||||
* @throws InvalidDataException Provided `ByteArray` is not a supported EOCD64.
|
||||
|
|
@ -23,17 +23,20 @@ internal class EndOfCentralDirectoryRecord(
|
|||
* @return A `EndOfCentralDirectoryRecord`.
|
||||
*/
|
||||
@Throws(InvalidDataException::class)
|
||||
fun fromByteArray(data: ByteArray, offset: Int): EndOfCentralDirectoryRecord {
|
||||
fun fromByteArray(
|
||||
data: ByteArray,
|
||||
offset: Int,
|
||||
): EndOfCentralDirectoryRecord {
|
||||
if (data.size - offset < SIZE) {
|
||||
throw InvalidDataException("EOCD must be at least 22 bytes")
|
||||
}
|
||||
val buf = ByteBuffer.wrap(data, offset, SIZE).order(ByteOrder.LITTLE_ENDIAN)
|
||||
if (buf.getInt().toUInt() != SIGNATURE) {
|
||||
throw InvalidSignatureException("Invalid signature")
|
||||
throw InvalidDataException("Invalid signature")
|
||||
}
|
||||
buf.position(offset + 16)
|
||||
return EndOfCentralDirectoryRecord(
|
||||
centralDirectoryOffset = buf.getInt().toUInt()
|
||||
centralDirectoryOffset = buf.getInt().toUInt(),
|
||||
)
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -7,11 +7,12 @@ import java.nio.ByteOrder
|
|||
* Represents a partial ZIP64 end of central directory record.
|
||||
*/
|
||||
internal class EndOfCentralDirectoryRecord64(
|
||||
val centralDirectoryOffset: ULong
|
||||
val centralDirectoryOffset: ULong,
|
||||
) {
|
||||
companion object {
|
||||
const val SIGNATURE = 0x06064b50U
|
||||
const val SIZE = 56
|
||||
|
||||
/**
|
||||
* Create `EndOfCentralDirectoryRecord64` from raw byte data.
|
||||
* @throws InvalidDataException Provided `ByteArray` is not a supported EOCD.
|
||||
|
|
@ -20,17 +21,20 @@ internal class EndOfCentralDirectoryRecord64(
|
|||
* @return A `EndOfCentralDirectoryRecord64`.
|
||||
*/
|
||||
@Throws(InvalidDataException::class)
|
||||
fun fromByteArray(data: ByteArray, offset: Int): EndOfCentralDirectoryRecord64 {
|
||||
fun fromByteArray(
|
||||
data: ByteArray,
|
||||
offset: Int,
|
||||
): EndOfCentralDirectoryRecord64 {
|
||||
if (data.size - offset < SIZE) {
|
||||
throw InvalidDataException("EOCD64 must be at least 56 bytes")
|
||||
}
|
||||
val buf = ByteBuffer.wrap(data, offset, SIZE).order(ByteOrder.LITTLE_ENDIAN)
|
||||
if (buf.getInt().toUInt() != SIGNATURE) {
|
||||
throw InvalidSignatureException("Invalid signature")
|
||||
throw InvalidDataException("Invalid signature")
|
||||
}
|
||||
buf.position(offset + 48)
|
||||
return EndOfCentralDirectoryRecord64(
|
||||
centralDirectoryOffset = buf.getLong().toULong()
|
||||
centralDirectoryOffset = buf.getLong().toULong(),
|
||||
)
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,11 +0,0 @@
|
|||
package ziputils
|
||||
|
||||
/**
|
||||
* Represents an invalid raw byte data exception.
|
||||
*/
|
||||
class InvalidDataException(message: String): Exception(message)
|
||||
|
||||
/**
|
||||
* Represents an invalid raw byte signature exception.
|
||||
*/
|
||||
class InvalidSignatureException(message: String): Exception(message)
|
||||
|
|
@ -5,5 +5,5 @@ package ziputils
|
|||
*/
|
||||
internal open class ExtraFieldRecord(
|
||||
val id: UShort,
|
||||
val size: UShort
|
||||
val size: UShort,
|
||||
)
|
||||
|
|
@ -0,0 +1,6 @@
|
|||
package ziputils
|
||||
|
||||
/**
|
||||
* Represents an invalid raw byte data exception.
|
||||
*/
|
||||
class InvalidDataException(message: String) : Exception(message)
|
||||
|
|
@ -8,7 +8,7 @@ internal class Zip64ExtraFieldRecord(
|
|||
val uncompressedSize: ULong?,
|
||||
val compressedSize: ULong?,
|
||||
val localHeaderOffset: ULong?,
|
||||
val disk: UInt?
|
||||
val disk: UInt?,
|
||||
) : ExtraFieldRecord(ID, size) {
|
||||
companion object {
|
||||
const val ID: UShort = 0x0001U
|
||||
|
|
|
|||
Reference in New Issue