mirror of
https://github.com/firebase/firebase-ios-sdk
synced 2026-11-09 22:36:01 +05:45
92 lines
3.0 KiB
Swift
92 lines
3.0 KiB
Swift
// Copyright 2022 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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import Foundation
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#if COCOAPODS
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import GTMSessionFetcher
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#else
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import GTMSessionFetcherCore
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#endif
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/**
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* Task which provides the ability to delete an object in Firebase Storage.
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*/
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class StorageGetMetadataTask: StorageTask, StorageTaskManagement {
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private var fetcher: GTMSessionFetcher?
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private var fetcherCompletion: ((Data?, NSError?) -> Void)?
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private var taskCompletion: ((_ metadata: StorageMetadata?, _: Error?) -> Void)?
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init(reference: StorageReference,
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fetcherService: GTMSessionFetcherService,
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queue: DispatchQueue,
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completion: ((_: StorageMetadata?, _: Error?) -> Void)?) {
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super.init(reference: reference, service: fetcherService, queue: queue)
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taskCompletion = completion
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}
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deinit {
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self.fetcher?.stopFetching()
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}
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/**
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* Prepares a task and begins execution.
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*/
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func enqueue() {
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if let completion = taskCompletion {
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taskCompletion = { (metadata: StorageMetadata?, error: Error?) in
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completion(metadata, error)
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// Reference self in completion handler in order to retain self until completion is called.
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self.taskCompletion = nil
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}
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}
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dispatchQueue.async { [weak self] in
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guard let self = self else { return }
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self.state = .queueing
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var request = self.baseRequest
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request.httpMethod = "GET"
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request.timeoutInterval = self.reference.storage.maxOperationRetryTime
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let fetcher = self.fetcherService.fetcher(with: request)
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fetcher.comment = "GetMetadataTask"
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self.fetcher = fetcher
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self.fetcherCompletion = { [weak self] (data: Data?, error: NSError?) in
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guard let self = self else { return }
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var metadata: StorageMetadata?
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if let error {
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if self.error == nil {
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self.error = StorageErrorCode.error(withServerError: error, ref: self.reference)
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}
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} else {
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if let data,
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let responseDictionary = try? JSONSerialization
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.jsonObject(with: data) as? [String: AnyHashable] {
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metadata = StorageMetadata(dictionary: responseDictionary)
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metadata?.fileType = .file
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} else {
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self.error = StorageErrorCode.error(withInvalidRequest: data)
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}
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}
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self.taskCompletion?(metadata, self.error)
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self.fetcherCompletion = nil
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}
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self.fetcher?.beginFetch { [weak self] data, error in
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self?.fetcherCompletion?(data, error as? NSError)
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}
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}
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}
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}
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