mirror of
https://github.com/firebase/firebase-ios-sdk
synced 2026-11-09 22:36:01 +05:45
119 lines
4.0 KiB
Objective-C
119 lines
4.0 KiB
Objective-C
// Copyright 2018 Google
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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 "FIRStorageGetDownloadURLTask.h"
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#import "FIRStorageTask_Private.h"
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@implementation FIRStorageGetDownloadURLTask {
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@private
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FIRStorageVoidURLError _completion;
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}
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@synthesize fetcher = _fetcher;
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@synthesize fetcherCompletion = _fetcherCompletion;
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- (instancetype)initWithReference:(FIRStorageReference *)reference
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fetcherService:(GTMSessionFetcherService *)service
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completion:(FIRStorageVoidURLError)completion {
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self = [super initWithReference:reference fetcherService:service];
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if (self) {
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_completion = [completion copy];
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}
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return self;
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}
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- (void)dealloc {
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[_fetcher stopFetching];
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}
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+ (NSURL *)downloadURLFromMetadataDictionary:(NSDictionary *)dictionary {
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NSString *downloadTokens = dictionary[kFIRStorageMetadataDownloadTokens];
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if (downloadTokens && downloadTokens.length > 0) {
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NSArray<NSString *> *downloadTokenArray = [downloadTokens componentsSeparatedByString:@","];
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NSString *bucket = dictionary[kFIRStorageMetadataBucket];
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NSString *path = dictionary[kFIRStorageMetadataName];
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NSString *fullPath = [NSString stringWithFormat:kFIRStorageFullPathFormat, bucket,
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[FIRStorageUtils GCSEscapedString:path]];
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NSURLComponents *components = [[NSURLComponents alloc] init];
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components.scheme = kFIRStorageScheme;
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components.host = kFIRStorageHost;
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components.percentEncodedPath = fullPath;
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// The backend can return an arbitrary number of download tokens, but we only expose the first
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// token via the download URL.
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NSURLQueryItem *altItem = [[NSURLQueryItem alloc] initWithName:@"alt" value:@"media"];
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NSURLQueryItem *tokenItem =
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[[NSURLQueryItem alloc] initWithName:@"token" value:downloadTokenArray[0]];
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components.queryItems = @[ altItem, tokenItem ];
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return [components URL];
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}
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return nil;
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}
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- (void)enqueue {
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NSMutableURLRequest *request = [self.baseRequest mutableCopy];
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request.HTTPMethod = @"GET";
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request.timeoutInterval = self.reference.storage.maxOperationRetryTime;
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FIRStorageVoidURLError callback = _completion;
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_completion = nil;
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GTMSessionFetcher *fetcher = [self.fetcherService fetcherWithRequest:request];
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_fetcher = fetcher;
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fetcher.comment = @"GetDownloadURLTask";
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__weak FIRStorageGetDownloadURLTask *weakSelf = self;
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_fetcherCompletion = ^(NSData *data, NSError *error) {
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__strong FIRStorageGetDownloadURLTask *strongSelf = weakSelf;
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if (strongSelf) {
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NSURL *downloadURL;
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if (error) {
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if (!strongSelf.error) {
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strongSelf.error =
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[FIRStorageErrors errorWithServerError:error reference:strongSelf.reference];
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}
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} else {
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NSDictionary *responseDictionary = [NSDictionary frs_dictionaryFromJSONData:data];
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if (responseDictionary != nil) {
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downloadURL =
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[FIRStorageGetDownloadURLTask downloadURLFromMetadataDictionary:responseDictionary];
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if (!downloadURL) {
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strongSelf.error =
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[FIRStorageErrors errorWithCustomMessage:@"Failed to retrieve a download URL."];
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}
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} else {
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strongSelf.error = [FIRStorageErrors errorWithInvalidRequest:data];
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}
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}
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if (callback) {
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callback(downloadURL, strongSelf.error);
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}
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strongSelf->_fetcherCompletion = nil;
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}
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};
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[fetcher beginFetchWithCompletionHandler:^(NSData *data, NSError *error) {
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weakSelf.fetcherCompletion(data, error);
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}];
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}
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@end
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