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app/src/main/java/com/stevesoltys/seedvault/plugins/webdav/WebDavStorage.kt
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| /* | ||
| * SPDX-FileCopyrightText: 2024 The Calyx Institute | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| */ | ||
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| package com.stevesoltys.seedvault.plugins.webdav | ||
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| import android.util.Log | ||
| import at.bitfire.dav4jvm.BasicDigestAuthHandler | ||
| import at.bitfire.dav4jvm.DavCollection | ||
| import at.bitfire.dav4jvm.Response | ||
| import at.bitfire.dav4jvm.property.ResourceType | ||
| import kotlinx.coroutines.DelicateCoroutinesApi | ||
| import kotlinx.coroutines.Dispatchers | ||
| import kotlinx.coroutines.GlobalScope | ||
| import kotlinx.coroutines.async | ||
| import kotlinx.coroutines.launch | ||
| import kotlinx.coroutines.runBlocking | ||
| import okhttp3.ConnectionSpec | ||
| import okhttp3.HttpUrl | ||
| import okhttp3.MediaType.Companion.toMediaType | ||
| import okhttp3.OkHttpClient | ||
| import okhttp3.RequestBody | ||
| import okio.BufferedSink | ||
| import java.io.IOException | ||
| import java.io.InputStream | ||
| import java.io.OutputStream | ||
| import java.io.PipedInputStream | ||
| import java.io.PipedOutputStream | ||
| import java.util.concurrent.TimeUnit | ||
| import kotlin.coroutines.resume | ||
| import kotlin.coroutines.suspendCoroutine | ||
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|
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| const val DEBUG_LOG = true | ||
| const val DIRECTORY_ROOT = ".SeedVaultAndroidBackup" | ||
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| @OptIn(DelicateCoroutinesApi::class) | ||
| internal abstract class WebDavStorage( | ||
| webDavConfig: WebDavConfig, | ||
| ) { | ||
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| companion object { | ||
| val TAG: String = WebDavStorage::class.java.simpleName | ||
| } | ||
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| private val authHandler = BasicDigestAuthHandler( | ||
| domain = null, // Optional, to only authenticate against hosts with this domain. | ||
| username = webDavConfig.username, | ||
| password = webDavConfig.password, | ||
| ) | ||
| protected val okHttpClient = OkHttpClient.Builder() | ||
| .followRedirects(false) | ||
| .authenticator(authHandler) | ||
| .addNetworkInterceptor(authHandler) | ||
| .connectTimeout(15, TimeUnit.SECONDS) | ||
| .writeTimeout(30, TimeUnit.SECONDS) | ||
| .readTimeout(120, TimeUnit.SECONDS) | ||
| .pingInterval(45, TimeUnit.SECONDS) | ||
| .connectionSpecs(listOf(ConnectionSpec.MODERN_TLS)) | ||
| .retryOnConnectionFailure(true) | ||
| .build() | ||
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| protected val url = "${webDavConfig.url}/$DIRECTORY_ROOT" | ||
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| @Throws(IOException::class) | ||
| protected suspend fun getOutputStream(location: HttpUrl): OutputStream { | ||
| val davCollection = DavCollection(okHttpClient, location) | ||
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| val pipedInputStream = PipedInputStream() | ||
| val pipedOutputStream = PipedCloseActionOutputStream(pipedInputStream) | ||
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| val body = object : RequestBody() { | ||
| override fun contentType() = "application/octet-stream".toMediaType() | ||
| override fun writeTo(sink: BufferedSink) { | ||
| pipedInputStream.use { inputStream -> | ||
| sink.outputStream().use { outputStream -> | ||
| inputStream.copyTo(outputStream) | ||
| } | ||
| } | ||
| } | ||
| } | ||
| val deferred = GlobalScope.async(Dispatchers.IO) { | ||
| davCollection.put(body) { response -> | ||
| debugLog { "getOutputStream($location) = $response" } | ||
| } | ||
| } | ||
| pipedOutputStream.doOnClose { | ||
| runBlocking { // blocking i/o wait | ||
| deferred.await() | ||
| } | ||
| } | ||
| return pipedOutputStream | ||
| } | ||
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| @Throws(IOException::class) | ||
| protected fun getInputStream(location: HttpUrl): InputStream { | ||
| val davCollection = DavCollection(okHttpClient, location) | ||
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| val pipedInputStream = PipedInputStream() | ||
| val pipedOutputStream = PipedOutputStream(pipedInputStream) | ||
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| GlobalScope.launch(Dispatchers.IO) { | ||
| davCollection.get(accept = "", headers = null) { response -> | ||
| val inputStream = response.body?.byteStream() | ||
| ?: throw IOException("No response body") | ||
| debugLog { "getInputStream($location) = $response" } | ||
| pipedOutputStream.use { outputStream -> | ||
| inputStream.copyTo(outputStream) | ||
| } | ||
| } | ||
| } | ||
| return pipedInputStream | ||
| } | ||
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| protected suspend fun DavCollection.createFolder(xmlBody: String? = null): okhttp3.Response { | ||
| return try { | ||
| suspendCoroutine { cont -> | ||
| mkCol(xmlBody) { response -> | ||
| cont.resume(response) | ||
| } | ||
| } | ||
| } catch (e: Exception) { | ||
| if (e is IOException) throw e | ||
| else throw IOException(e) | ||
| } | ||
| } | ||
|
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| protected inline fun debugLog(block: () -> String) { | ||
| if (DEBUG_LOG) Log.d(TAG, block()) | ||
| } | ||
|
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| protected fun Response.isFolder(): Boolean { | ||
| return this[ResourceType::class.java]?.types?.contains(ResourceType.COLLECTION) == true | ||
| } | ||
|
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| private class PipedCloseActionOutputStream( | ||
| inputStream: PipedInputStream, | ||
| ) : PipedOutputStream(inputStream) { | ||
|
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| private var onClose: (() -> Unit)? = null | ||
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| @Throws(IOException::class) | ||
| override fun close() { | ||
| super.close() | ||
| try { | ||
| onClose?.invoke() | ||
| } catch (e: Exception) { | ||
| if (e is IOException) throw e | ||
| else throw IOException(e) | ||
| } | ||
| } | ||
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| fun doOnClose(function: () -> Unit) { | ||
| this.onClose = function | ||
| } | ||
| } | ||
|
|
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| } |
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