mirror of
https://github.com/Swiftgram/Telegram-iOS.git
synced 2025-08-17 11:00:07 +00:00
750 lines
35 KiB
Swift
750 lines
35 KiB
Swift
import Foundation
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#if os(macOS)
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import PostboxMac
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import SwiftSignalKitMac
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import MtProtoKitMac
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#else
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import Postbox
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import SwiftSignalKit
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import MtProtoKitDynamic
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#endif
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#if os(macOS)
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private typealias SignalKitTimer = SwiftSignalKitMac.Timer
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#else
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private typealias SignalKitTimer = SwiftSignalKit.Timer
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#endif
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private final class MultipartDownloadState {
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let aesKey: Data
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var aesIv: Data
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let decryptedSize: Int32?
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var currentSize: Int32 = 0
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init(encryptionKey: SecretFileEncryptionKey?, decryptedSize: Int32?) {
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if let encryptionKey = encryptionKey {
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self.aesKey = encryptionKey.aesKey
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self.aesIv = encryptionKey.aesIv
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} else {
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self.aesKey = Data()
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self.aesIv = Data()
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}
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self.decryptedSize = decryptedSize
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}
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func transform(data: Data) -> Data {
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if self.aesKey.count != 0 {
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var decryptedData = data
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assert(decryptedSize != nil)
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assert(decryptedData.count % 16 == 0)
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decryptedData.withUnsafeMutableBytes { (bytes: UnsafeMutablePointer<UInt8>) -> Void in
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self.aesIv.withUnsafeMutableBytes { (iv: UnsafeMutablePointer<UInt8>) -> Void in
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MTAesDecryptBytesInplaceAndModifyIv(bytes, decryptedData.count, self.aesKey, iv)
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}
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}
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if self.currentSize + Int32(decryptedData.count) > self.decryptedSize! {
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decryptedData.count = Int(self.decryptedSize! - self.currentSize)
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}
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self.currentSize += Int32(decryptedData.count)
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return decryptedData
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} else {
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return data
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}
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}
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}
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private enum MultipartFetchDownloadError {
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case generic
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case switchToCdn(id: Int32, token: Data, key: Data, iv: Data, partHashes: [Int32: Data])
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case reuploadToCdn(masterDatacenterId: Int32, token: Data)
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case hashesMissing
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}
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private enum MultipartFetchMasterLocation {
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case generic(Int32, Api.InputFileLocation)
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case web(Int32, Api.InputWebFileLocation)
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var datacenterId: Int32 {
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switch self {
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case let .generic(id, _):
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return id
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case let .web(id, _):
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return id
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}
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}
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}
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private final class DownloadWrapper {
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private let id: Int32
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private let cdn: Bool
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private let take: (Int32, Bool) -> Signal<Download, NoError>
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private let value = Atomic<Promise<Download>?>(value: nil)
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init(id: Int32, cdn: Bool, take: @escaping (Int32, Bool) -> Signal<Download, NoError>) {
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self.id = id
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self.cdn = cdn
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self.take = take
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}
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func get() -> Signal<Download, NoError> {
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return Signal { subscriber in
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var initialize = false
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let result = self.value.modify { current in
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if let current = current {
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return current
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} else {
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let value = Promise<Download>()
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initialize = true
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return value
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}
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}
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if let result = result {
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if initialize {
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result.set(self.take(self.id, self.cdn))
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}
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return result.get().start(next: { next in
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subscriber.putNext(next)
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subscriber.putCompletion()
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})
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} else {
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return EmptyDisposable
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}
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}
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}
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}
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private func roundUp(_ value: Int, to multiple: Int) -> Int {
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if multiple == 0 {
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return value
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}
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let remainder = value % multiple
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if remainder == 0 {
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return value
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}
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return value + multiple - remainder
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}
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private let dataHashLength: Int32 = 128 * 1024
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private final class MultipartCdnHashSource {
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private let queue: Queue
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private let fileToken: Data
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private let masterDownload: DownloadWrapper
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private var knownUpperBound: Int32
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private var hashes: [Int32: Data] = [:]
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private var requestOffsetAndDisposable: (Int32, Disposable)?
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private var requestedUpperBound: Int32?
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private var subscribers = Bag<(Int32, Int32, ([Int32: Data]) -> Void)>()
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init(queue: Queue, fileToken: Data, hashes: [Int32: Data], masterDownload: DownloadWrapper) {
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assert(queue.isCurrent())
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self.queue = queue
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self.fileToken = fileToken
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self.masterDownload = masterDownload
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var knownUpperBound: Int32 = 0
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/*self.hashes = hashes
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for (offset, _) in hashes {
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assert(offset % dataHashLength == 0)
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knownUpperBound = max(knownUpperBound, offset + dataHashLength)
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}*/
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self.knownUpperBound = knownUpperBound
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}
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deinit {
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assert(self.queue.isCurrent())
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self.requestOffsetAndDisposable?.1.dispose()
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}
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private func take(offset: Int32, limit: Int32) -> [Int32: Data]? {
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assert(offset % dataHashLength == 0)
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assert(limit % dataHashLength == 0)
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var result: [Int32: Data] = [:]
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var localOffset: Int32 = 0
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while localOffset < limit {
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if let hash = self.hashes[offset + localOffset] {
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result[offset + localOffset] = hash
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} else {
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return nil
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}
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localOffset += dataHashLength
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}
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return result
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}
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func get(offset: Int32, limit: Int32) -> Signal<[Int32: Data], MultipartFetchDownloadError> {
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assert(self.queue.isCurrent())
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let queue = self.queue
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return Signal { [weak self] subscriber in
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let disposable = MetaDisposable()
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queue.async {
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if let strongSelf = self {
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if let result = strongSelf.take(offset: offset, limit: limit) {
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subscriber.putNext(result)
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subscriber.putCompletion()
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} else {
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let index = strongSelf.subscribers.add((offset, limit, { result in
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subscriber.putNext(result)
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subscriber.putCompletion()
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}))
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disposable.set(ActionDisposable {
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queue.async {
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if let strongSelf = self {
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strongSelf.subscribers.remove(index)
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}
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}
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})
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if let requestedUpperBound = strongSelf.requestedUpperBound {
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strongSelf.requestedUpperBound = max(requestedUpperBound, offset + limit)
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} else {
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strongSelf.requestedUpperBound = offset + limit
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}
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if strongSelf.requestOffsetAndDisposable == nil {
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strongSelf.requestMore()
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} else {
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if let requestedUpperBound = strongSelf.requestedUpperBound {
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strongSelf.requestedUpperBound = max(requestedUpperBound, offset + limit)
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} else {
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strongSelf.requestedUpperBound = offset + limit
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}
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}
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}
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}
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}
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return disposable
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}
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}
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private func requestMore() {
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assert(self.queue.isCurrent())
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let requestOffset = self.knownUpperBound
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let disposable = MetaDisposable()
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self.requestOffsetAndDisposable = (requestOffset, disposable)
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let queue = self.queue
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let fileToken = self.fileToken
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disposable.set((self.masterDownload.get() |> mapToSignal { download -> Signal<[Int32: Data], NoError> in
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return download.request(Api.functions.upload.getCdnFileHashes(fileToken: Buffer(data: fileToken), offset: requestOffset))
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|> map { partHashes -> [Int32: Data] in
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var parsedPartHashes: [Int32: Data] = [:]
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for part in partHashes {
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switch part {
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case let .cdnFileHash(offset, limit, bytes):
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assert(limit == 128 * 1024)
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parsedPartHashes[offset] = bytes.makeData()
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}
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}
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return parsedPartHashes
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}
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|> `catch` { _ -> Signal<[Int32: Data], NoError> in
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return .single([:])
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}
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} |> deliverOn(queue)).start(next: { [weak self] result in
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if let strongSelf = self {
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if strongSelf.requestOffsetAndDisposable?.0 == requestOffset {
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strongSelf.requestOffsetAndDisposable = nil
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for (hashOffset, hashData) in result {
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assert(hashOffset % dataHashLength == 0)
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strongSelf.knownUpperBound = max(strongSelf.knownUpperBound, hashOffset + dataHashLength)
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strongSelf.hashes[hashOffset] = hashData
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}
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for (index, item) in strongSelf.subscribers.copyItemsWithIndices() {
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let (offset, limit, subscriber) = item
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if let data = strongSelf.take(offset: offset, limit: limit) {
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strongSelf.subscribers.remove(index)
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subscriber(data)
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}
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}
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if let requestedUpperBound = strongSelf.requestedUpperBound, requestedUpperBound > strongSelf.knownUpperBound {
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strongSelf.requestMore()
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}
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} else {
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//assertionFailure()
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}
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}
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}))
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}
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}
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private enum MultipartFetchSource {
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case none
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case master(location: MultipartFetchMasterLocation, download: DownloadWrapper)
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case cdn(masterDatacenterId: Int32, fileToken: Data, key: Data, iv: Data, download: DownloadWrapper, masterDownload: DownloadWrapper, hashSource: MultipartCdnHashSource)
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func request(offset: Int32, limit: Int32) -> Signal<Data, MultipartFetchDownloadError> {
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switch self {
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case .none:
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return .never()
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case let .master(location, download):
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return download.get()
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|> mapToSignalPromotingError { download -> Signal<Data, MultipartFetchDownloadError> in
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var updatedLength = roundUp(Int(limit), to: 4096)
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while updatedLength % 4096 != 0 || 1048576 % updatedLength != 0 {
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updatedLength += 1
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}
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switch location {
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case let .generic(_, location):
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return download.request(Api.functions.upload.getFile(location: location, offset: offset, limit: Int32(updatedLength)))
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|> mapError { _ -> MultipartFetchDownloadError in
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return .generic
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}
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|> mapToSignal { result -> Signal<Data, MultipartFetchDownloadError> in
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switch result {
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case let .file(_, _, bytes):
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var resultData = bytes.makeData()
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if resultData.count > Int(limit) {
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resultData.count = Int(limit)
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}
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return .single(resultData)
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case let .fileCdnRedirect(dcId, fileToken, encryptionKey, encryptionIv, partHashes):
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var parsedPartHashes: [Int32: Data] = [:]
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for part in partHashes {
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switch part {
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case let .cdnFileHash(offset, limit, bytes):
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assert(limit == 128 * 1024)
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parsedPartHashes[offset] = bytes.makeData()
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}
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}
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return .fail(.switchToCdn(id: dcId, token: fileToken.makeData(), key: encryptionKey.makeData(), iv: encryptionIv.makeData(), partHashes: parsedPartHashes))
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}
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}
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case let .web(_, location):
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return download.request(Api.functions.upload.getWebFile(location: location, offset: offset, limit: Int32(updatedLength)))
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|> mapError { _ -> MultipartFetchDownloadError in
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return .generic
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}
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|> mapToSignal { result -> Signal<Data, MultipartFetchDownloadError> in
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switch result {
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case let .webFile(_, _, _, _, bytes):
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var resultData = bytes.makeData()
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if resultData.count > Int(limit) {
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resultData.count = Int(limit)
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}
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return .single(resultData)
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}
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}
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}
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}
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case let .cdn(masterDatacenterId, fileToken, key, iv, download, _, hashSource):
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let part = download.get()
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|> mapToSignalPromotingError { download -> Signal<Data, MultipartFetchDownloadError> in
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var updatedLength = roundUp(Int(limit), to: 4096)
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while updatedLength % 4096 != 0 || 1048576 % updatedLength != 0 {
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updatedLength += 1
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}
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return download.request(Api.functions.upload.getCdnFile(fileToken: Buffer(data: fileToken), offset: offset, limit: Int32(updatedLength)))
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|> mapError { _ -> MultipartFetchDownloadError in
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return .generic
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}
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|> mapToSignal { result -> Signal<Data, MultipartFetchDownloadError> in
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switch result {
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case let .cdnFileReuploadNeeded(token):
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return .fail(.reuploadToCdn(masterDatacenterId: masterDatacenterId, token: token.makeData()))
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case let .cdnFile(bytes):
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if bytes.size == 0 {
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return .single(bytes.makeData())
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} else {
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var partIv = iv
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partIv.withUnsafeMutableBytes { (bytes: UnsafeMutablePointer<Int8>) -> Void in
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var ivOffset: Int32 = (offset / 16).bigEndian
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memcpy(bytes.advanced(by: partIv.count - 4), &ivOffset, 4)
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}
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return .single(MTAesCtrDecrypt(bytes.makeData(), key, partIv))
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}
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}
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}
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}
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return combineLatest(part, hashSource.get(offset: offset, limit: limit))
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|> mapToSignal { partData, hashData -> Signal<Data, MultipartFetchDownloadError> in
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var localOffset = 0
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while localOffset < partData.count {
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let dataToHash = partData.subdata(in: localOffset ..< min(partData.count, localOffset + Int(dataHashLength)))
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if let hash = hashData[offset + Int32(localOffset)] {
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let localHash = MTSha256(dataToHash)
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if localHash != hash {
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return .fail(.generic)
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}
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} else {
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return .fail(.generic)
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}
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localOffset += Int(dataHashLength)
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}
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return .single(partData)
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}
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}
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}
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}
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private final class MultipartFetchManager {
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let parallelParts: Int
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let defaultPartSize = 128 * 1024
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let partAlignment = 128 * 1024
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let queue = Queue()
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var currentRanges: IndexSet?
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var currentFilledRanges = IndexSet()
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var completeSize: Int?
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var completeSizeReported = false
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let takeDownloader: (Int32, Bool) -> Signal<Download, NoError>
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let partReady: (Int, Data) -> Void
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let reportCompleteSize: (Int) -> Void
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private var source: MultipartFetchSource
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var fetchingParts: [Int: (Int, Disposable)] = [:]
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var fetchedParts: [Int: (Int, Data)] = [:]
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var cachedPartHashes: [Int: Data] = [:]
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var reuploadingToCdn = false
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let reuploadToCdnDisposable = MetaDisposable()
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var state: MultipartDownloadState
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var rangesDisposable: Disposable?
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init(size: Int?, ranges: Signal<IndexSet, NoError>, encryptionKey: SecretFileEncryptionKey?, decryptedSize: Int32?, location: MultipartFetchMasterLocation, takeDownloader: @escaping (Int32, Bool) -> Signal<Download, NoError>, partReady: @escaping (Int, Data) -> Void, reportCompleteSize: @escaping (Int) -> Void) {
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self.completeSize = size
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if let size = size {
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self.parallelParts = 4
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/*if size <= range.lowerBound {
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self.range = range
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self.parallelParts = 0
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} else {
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self.range = range.lowerBound ..< min(range.upperBound, size)
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}*/
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} else {
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//self.range = range
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self.parallelParts = 1
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}
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self.state = MultipartDownloadState(encryptionKey: encryptionKey, decryptedSize: decryptedSize)
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//self.committedOffset = range.lowerBound
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self.takeDownloader = takeDownloader
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self.source = .master(location: location, download: DownloadWrapper(id: location.datacenterId, cdn: false, take: takeDownloader))
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self.partReady = partReady
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self.reportCompleteSize = reportCompleteSize
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self.rangesDisposable = (ranges |> deliverOn(self.queue)).start(next: { [weak self] ranges in
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if let strongSelf = self {
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if let currentRanges = strongSelf.currentRanges {
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let updatedRanges = currentRanges.subtracting(strongSelf.currentFilledRanges)
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strongSelf.currentRanges = updatedRanges
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strongSelf.checkState()
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} else {
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strongSelf.currentRanges = ranges
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strongSelf.checkState()
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}
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}
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})
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}
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deinit {
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let rangesDisposable = self.rangesDisposable
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self.queue.async {
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rangesDisposable?.dispose()
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}
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}
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func start() {
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self.queue.async {
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self.checkState()
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}
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}
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func cancel() {
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self.queue.async {
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self.source = .none
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for (_, (_, disposable)) in self.fetchingParts {
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disposable.dispose()
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}
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self.reuploadToCdnDisposable.dispose()
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}
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}
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func checkState() {
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guard let currentRanges = self.currentRanges else {
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return
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}
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var rangesToFetch = currentRanges.subtracting(self.currentFilledRanges)
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for offset in self.fetchedParts.keys.sorted() {
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if let (_, data) = self.fetchedParts[offset] {
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let partRange = offset ..< (offset + data.count)
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rangesToFetch.remove(integersIn: partRange)
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if let minOffset = currentRanges.rangeView.first?.lowerBound {
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if true || minOffset >= offset {
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self.currentFilledRanges.insert(integersIn: partRange)
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self.fetchedParts.removeValue(forKey: offset)
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self.partReady(offset, self.state.transform(data: data))
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} else {
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if !currentRanges.intersects(integersIn: partRange) {
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self.fetchedParts.removeValue(forKey: offset)
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}
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}
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}
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}
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}
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for (offset, (size, _)) in self.fetchingParts {
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rangesToFetch.remove(integersIn: offset ..< (offset + size))
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}
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if let completeSize = self.completeSize {
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self.currentFilledRanges.insert(integersIn: completeSize ..< Int.max)
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rangesToFetch.remove(integersIn: completeSize ..< Int.max)
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if rangesToFetch.isEmpty && self.fetchingParts.isEmpty && !self.completeSizeReported {
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self.completeSizeReported = true
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assert(self.fetchedParts.isEmpty)
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self.reportCompleteSize(completeSize)
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}
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}
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while !rangesToFetch.isEmpty && self.fetchingParts.count < self.parallelParts && !self.reuploadingToCdn {
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var selectedRange: (Range<Int>, Range<Int>)?
|
|
for range in rangesToFetch.rangeView {
|
|
var dataRange: Range<Int> = range.lowerBound ..< min(range.lowerBound + self.defaultPartSize, range.upperBound)
|
|
let rawRange: Range<Int> = dataRange
|
|
if dataRange.lowerBound % self.partAlignment != 0 {
|
|
let previousBoundary = (dataRange.lowerBound / self.partAlignment) * self.partAlignment
|
|
dataRange = previousBoundary ..< dataRange.upperBound
|
|
}
|
|
if dataRange.lowerBound / (1024 * 1024) != (dataRange.upperBound - 1) / (1024 * 1024) {
|
|
let nextBoundary = (dataRange.lowerBound / (1024 * 1024) + 1) * (1024 * 1024)
|
|
dataRange = dataRange.lowerBound ..< nextBoundary
|
|
}
|
|
selectedRange = (rawRange, dataRange)
|
|
break
|
|
}
|
|
if let (rawRange, downloadRange) = selectedRange {
|
|
rangesToFetch.remove(integersIn: downloadRange)
|
|
var requestLimit = downloadRange.count
|
|
if requestLimit % self.partAlignment != 0 {
|
|
requestLimit = (requestLimit / self.partAlignment + 1) * self.partAlignment
|
|
}
|
|
let part = self.source.request(offset: Int32(downloadRange.lowerBound), limit: Int32(requestLimit))
|
|
|> deliverOn(self.queue)
|
|
self.fetchingParts[downloadRange.lowerBound] = (downloadRange.count, part.start(next: { [weak self] data in
|
|
if let strongSelf = self {
|
|
var data = data
|
|
if data.count < downloadRange.count {
|
|
strongSelf.completeSize = downloadRange.lowerBound + data.count
|
|
}
|
|
let _ = strongSelf.fetchingParts.removeValue(forKey: downloadRange.lowerBound)
|
|
strongSelf.fetchedParts[downloadRange.lowerBound] = (rawRange.lowerBound, data)
|
|
strongSelf.checkState()
|
|
}
|
|
}, error: { [weak self] error in
|
|
if let strongSelf = self {
|
|
let _ = strongSelf.fetchingParts.removeValue(forKey: downloadRange.lowerBound)
|
|
switch error {
|
|
case .generic:
|
|
break
|
|
case let .switchToCdn(id, token, key, iv, partHashes):
|
|
switch strongSelf.source {
|
|
case let .master(location, download):
|
|
strongSelf.source = .cdn(masterDatacenterId: location.datacenterId, fileToken: token, key: key, iv: iv, download: DownloadWrapper(id: id, cdn: true, take: strongSelf.takeDownloader), masterDownload: download, hashSource: MultipartCdnHashSource(queue: strongSelf.queue, fileToken: token, hashes: partHashes, masterDownload: download))
|
|
strongSelf.checkState()
|
|
case .cdn, .none:
|
|
break
|
|
}
|
|
case let .reuploadToCdn(_, token):
|
|
switch strongSelf.source {
|
|
case .master, .none:
|
|
break
|
|
case let .cdn(_, fileToken, _, _, _, masterDownload, _):
|
|
if !strongSelf.reuploadingToCdn {
|
|
strongSelf.reuploadingToCdn = true
|
|
let reupload: Signal<[Api.CdnFileHash], NoError> = masterDownload.get() |> mapToSignal { download -> Signal<[Api.CdnFileHash], NoError> in
|
|
return download.request(Api.functions.upload.reuploadCdnFile(fileToken: Buffer(data: fileToken), requestToken: Buffer(data: token)))
|
|
|> `catch` { _ -> Signal<[Api.CdnFileHash], NoError> in
|
|
return .single([])
|
|
}
|
|
}
|
|
strongSelf.reuploadToCdnDisposable.set((reupload |> deliverOn(strongSelf.queue)).start(next: { _ in
|
|
if let strongSelf = self {
|
|
strongSelf.reuploadingToCdn = false
|
|
strongSelf.checkState()
|
|
}
|
|
}))
|
|
}
|
|
}
|
|
case .hashesMissing:
|
|
break
|
|
}
|
|
}
|
|
}))
|
|
} else {
|
|
break
|
|
}
|
|
}
|
|
/*for offset in self.fetchedParts.keys.sorted() {
|
|
if offset == self.committedOffset {
|
|
let data = self.fetchedParts[offset]!
|
|
self.committedOffset += data.count
|
|
let _ = self.fetchedParts.removeValue(forKey: offset)
|
|
self.partReady(offset, self.state.transform(data: data))
|
|
}
|
|
}
|
|
|
|
if let completeSize = self.completeSize, self.committedOffset >= completeSize {
|
|
self.completed()
|
|
} else if self.committedOffset >= self.range.upperBound {
|
|
self.completed()
|
|
} else {
|
|
while fetchingParts.count < self.parallelParts && !self.reuploadingToCdn {
|
|
var processedParts: [(Int, Int)] = []
|
|
for (offset, (size, _)) in self.fetchingParts {
|
|
processedParts.append((offset, size))
|
|
}
|
|
for (offset, data) in self.fetchedParts {
|
|
processedParts.append((offset, data.count))
|
|
}
|
|
processedParts.sort(by: { $0.0 < $1.0 })
|
|
var nextOffset = self.committedOffset
|
|
var requestPartSize = self.defaultPartSize
|
|
for (offset, size) in processedParts {
|
|
if offset >= self.committedOffset {
|
|
if offset == nextOffset {
|
|
nextOffset = offset + size
|
|
} else {
|
|
break
|
|
}
|
|
}
|
|
}
|
|
|
|
if nextOffset / (1024 * 1024) != (nextOffset + requestPartSize - 1) / (1024 * 1024) {
|
|
let nextBoundary = (nextOffset / (1024 * 1024) + 1) * (1024 * 1024)
|
|
requestPartSize = nextBoundary - nextOffset
|
|
}
|
|
|
|
if nextOffset < self.range.upperBound {
|
|
let partSize = min(requestPartSize, self.range.upperBound - nextOffset)
|
|
let part = self.source.request(offset: Int32(nextOffset), limit: Int32(requestPartSize))
|
|
|> deliverOn(self.queue)
|
|
let partOffset = nextOffset
|
|
self.fetchingParts[nextOffset] = (partSize, part.start(next: { [weak self] data in
|
|
if let strongSelf = self {
|
|
var data = data
|
|
if data.count > partSize {
|
|
data = data.subdata(in: 0 ..< partSize)
|
|
}
|
|
strongSelf.receivedSize += data.count
|
|
if let _ = strongSelf.completeSize {
|
|
if data.count != partSize {
|
|
assertionFailure()
|
|
return
|
|
}
|
|
} else if data.count < partSize {
|
|
strongSelf.completeSize = partOffset + data.count
|
|
}
|
|
let _ = strongSelf.fetchingParts.removeValue(forKey: partOffset)
|
|
strongSelf.fetchedParts[partOffset] = data
|
|
strongSelf.checkState()
|
|
}
|
|
}, error: { [weak self] error in
|
|
if let strongSelf = self {
|
|
let _ = strongSelf.fetchingParts.removeValue(forKey: partOffset)
|
|
switch error {
|
|
case .generic:
|
|
break
|
|
case let .switchToCdn(id, token, key, iv, partHashes):
|
|
switch strongSelf.source {
|
|
case let .master(location, download):
|
|
strongSelf.source = .cdn(masterDatacenterId: location.datacenterId, fileToken: token, key: key, iv: iv, download: DownloadWrapper(id: id, cdn: true, take: strongSelf.takeDownloader), masterDownload: download, hashSource: MultipartCdnHashSource(queue: strongSelf.queue, fileToken: token, hashes: partHashes, masterDownload: download))
|
|
strongSelf.checkState()
|
|
case .cdn, .none:
|
|
break
|
|
}
|
|
case let .reuploadToCdn(_, token):
|
|
switch strongSelf.source {
|
|
case .master, .none:
|
|
break
|
|
case let .cdn(_, fileToken, _, _, _, masterDownload, _):
|
|
if !strongSelf.reuploadingToCdn {
|
|
strongSelf.reuploadingToCdn = true
|
|
let reupload: Signal<[Api.CdnFileHash], NoError> = masterDownload.get() |> mapToSignal { download -> Signal<[Api.CdnFileHash], NoError> in
|
|
return download.request(Api.functions.upload.reuploadCdnFile(fileToken: Buffer(data: fileToken), requestToken: Buffer(data: token)))
|
|
|> `catch` { _ -> Signal<[Api.CdnFileHash], NoError> in
|
|
return .single([])
|
|
}
|
|
}
|
|
strongSelf.reuploadToCdnDisposable.set((reupload |> deliverOn(strongSelf.queue)).start(next: { _ in
|
|
if let strongSelf = self {
|
|
strongSelf.reuploadingToCdn = false
|
|
strongSelf.checkState()
|
|
}
|
|
}))
|
|
}
|
|
}
|
|
case .hashesMissing:
|
|
break
|
|
}
|
|
}
|
|
}))
|
|
} else {
|
|
break
|
|
}
|
|
}
|
|
}*/
|
|
}
|
|
}
|
|
|
|
func multipartFetch(account: Account, resource: TelegramMultipartFetchableResource, size: Int?, ranges: Signal<IndexSet, NoError>, tag: MediaResourceFetchTag?, encryptionKey: SecretFileEncryptionKey? = nil, decryptedSize: Int32? = nil) -> Signal<MediaResourceDataFetchResult, NoError> {
|
|
return Signal { subscriber in
|
|
let datacenterId = resource.datacenterId
|
|
let location: MultipartFetchMasterLocation
|
|
if let resource = resource as? TelegramCloudMediaResource {
|
|
location = .generic(Int32(datacenterId), resource.apiInputLocation)
|
|
} else if let resource = resource as? WebFileReferenceMediaResource {
|
|
location = .web(Int32(datacenterId), resource.apiInputLocation)
|
|
} else {
|
|
assertionFailure("multipartFetch: unsupported resource type \(resource)")
|
|
return EmptyDisposable
|
|
}
|
|
|
|
let manager = MultipartFetchManager(size: size, ranges: ranges, encryptionKey: encryptionKey, decryptedSize: decryptedSize, location: location, takeDownloader: { id, cdn in
|
|
return account.network.download(datacenterId: Int(id), isCdn: cdn, tag: tag)
|
|
}, partReady: { dataOffset, data in
|
|
subscriber.putNext(.dataPart(resourceOffset: dataOffset, data: data, range: 0 ..< data.count, complete: false))
|
|
}, reportCompleteSize: { size in
|
|
subscriber.putNext(.resourceSizeUpdated(size))
|
|
subscriber.putCompletion()
|
|
})
|
|
|
|
manager.start()
|
|
|
|
var managerRef: MultipartFetchManager? = manager
|
|
|
|
return ActionDisposable {
|
|
managerRef?.cancel()
|
|
managerRef = nil
|
|
}
|
|
}
|
|
}
|