mirror of
https://github.com/firebase/firebase-ios-sdk
synced 2026-11-09 22:36:01 +05:45
83 lines
3.3 KiB
Swift
83 lines
3.3 KiB
Swift
// Copyright 2022 Google LLC
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
import Foundation
|
|
|
|
#if COCOAPODS
|
|
import GTMSessionFetcher
|
|
#else
|
|
import GTMSessionFetcherCore
|
|
#endif
|
|
|
|
/// Task which provides the ability to get a download URL for an object in Firebase Storage.
|
|
@available(iOS 13, tvOS 13, macOS 10.15, macCatalyst 13, watchOS 7, *)
|
|
enum StorageGetDownloadURLTask {
|
|
static func getDownloadURLTask(reference: StorageReference,
|
|
fetcherService: GTMSessionFetcherService,
|
|
queue: DispatchQueue,
|
|
completion: ((_: URL?, _: Error?) -> Void)?) {
|
|
StorageInternalTask(reference: reference,
|
|
fetcherService: fetcherService,
|
|
queue: queue,
|
|
httpMethod: "GET",
|
|
fetcherComment: "GetDownloadURLTask") { (data: Data?, error: Error?) in
|
|
if let error {
|
|
completion?(nil, error)
|
|
} else {
|
|
if let data,
|
|
let responseDictionary = try? JSONSerialization
|
|
.jsonObject(with: data) as? [String: Any] {
|
|
guard let downloadURL = downloadURLFromMetadataDictionary(responseDictionary,
|
|
reference) else {
|
|
let error = StorageError.unknown(
|
|
message: "Failed to retrieve a download URL.",
|
|
serverError: [:]
|
|
) as NSError
|
|
completion?(nil, error)
|
|
return
|
|
}
|
|
completion?(downloadURL, nil)
|
|
} else {
|
|
completion?(nil, StorageErrorCode.error(withInvalidRequest: data))
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static func downloadURLFromMetadataDictionary(_ dictionary: [String: Any],
|
|
_ reference: StorageReference) -> URL? {
|
|
let downloadTokens = dictionary["downloadTokens"]
|
|
guard let downloadTokens = downloadTokens as? String,
|
|
downloadTokens.count > 0 else {
|
|
return nil
|
|
}
|
|
let downloadTokenArray = downloadTokens.components(separatedBy: ",")
|
|
let bucket = dictionary["bucket"] ?? "<error: missing bucket>"
|
|
let path = dictionary["name"] as? String ?? "<error: missing path name>"
|
|
let fullPath = "/v0/b/\(bucket)/o/\(StorageUtils.GCSEscapedString(path))"
|
|
var components = URLComponents()
|
|
components.scheme = reference.storage.scheme
|
|
components.host = reference.storage.host
|
|
components.port = reference.storage.port
|
|
components.percentEncodedPath = fullPath
|
|
|
|
// The backend can return an arbitrary number of download tokens, but we only expose the first
|
|
// token via the download URL.
|
|
let altItem = URLQueryItem(name: "alt", value: "media")
|
|
let tokenItem = URLQueryItem(name: "token", value: downloadTokenArray[0])
|
|
components.queryItems = [altItem, tokenItem]
|
|
return components.url
|
|
}
|
|
}
|