121 lines
4.4 KiB
Objective-C
121 lines
4.4 KiB
Objective-C
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#import "RNCAssetsLibraryRequestHandler.h"
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#import <stdatomic.h>
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#import <dlfcn.h>
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#import <objc/runtime.h>
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#import <Photos/Photos.h>
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#import <MobileCoreServices/MobileCoreServices.h>
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#import <React/RCTBridge.h>
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#import <React/RCTUtils.h>
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@implementation RNCAssetsLibraryRequestHandler
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RCT_EXPORT_MODULE()
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#pragma mark - RCTURLRequestHandler
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- (BOOL)canHandleRequest:(NSURLRequest *)request
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{
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if (![PHAsset class]) {
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return NO;
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}
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return [request.URL.scheme caseInsensitiveCompare:@"assets-library"] == NSOrderedSame
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|| [request.URL.scheme caseInsensitiveCompare:@"ph"] == NSOrderedSame;
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}
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- (id)sendRequest:(NSURLRequest *)request
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withDelegate:(id<RCTURLRequestDelegate>)delegate
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{
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__block atomic_bool cancelled = ATOMIC_VAR_INIT(NO);
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void (^cancellationBlock)(void) = ^{
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atomic_store(&cancelled, YES);
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};
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if (!request.URL) {
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NSString *const msg = [NSString stringWithFormat:@"Cannot send request without URL"];
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[delegate URLRequest:cancellationBlock didCompleteWithError:RCTErrorWithMessage(msg)];
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return cancellationBlock;
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}
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PHFetchResult<PHAsset *> *fetchResult;
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if ([request.URL.scheme caseInsensitiveCompare:@"ph"] == NSOrderedSame) {
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// Fetch assets using PHAsset localIdentifier (recommended)
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NSString *const localIdentifier = [request.URL.absoluteString substringFromIndex:@"ph://".length];
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fetchResult = [PHAsset fetchAssetsWithLocalIdentifiers:@[localIdentifier] options:nil];
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} else if ([request.URL.scheme caseInsensitiveCompare:@"assets-library"] == NSOrderedSame) {
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// This is the older, deprecated way of fetching assets from assets-library
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// using the "assets-library://" protocol
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fetchResult = [PHAsset fetchAssetsWithALAssetURLs:@[request.URL] options:nil];
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} else {
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NSString *const msg = [NSString stringWithFormat:@"Cannot send request with unknown protocol: %@", request.URL];
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[delegate URLRequest:cancellationBlock didCompleteWithError:RCTErrorWithMessage(msg)];
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return cancellationBlock;
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}
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if (![fetchResult firstObject]) {
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NSString *errorMessage = [NSString stringWithFormat:@"Failed to load asset"
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" at URL %@ with no error message.", request.URL];
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NSError *error = RCTErrorWithMessage(errorMessage);
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[delegate URLRequest:cancellationBlock didCompleteWithError:error];
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return cancellationBlock;
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}
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if (atomic_load(&cancelled)) {
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return cancellationBlock;
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}
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PHAsset *const _Nonnull asset = [fetchResult firstObject];
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// By default, allow downloading images from iCloud
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PHImageRequestOptions *const requestOptions = [PHImageRequestOptions new];
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requestOptions.networkAccessAllowed = YES;
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[[PHImageManager defaultManager] requestImageDataForAsset:asset
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options:requestOptions
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resultHandler:^(NSData * _Nullable imageData,
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NSString * _Nullable dataUTI,
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UIImageOrientation orientation,
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NSDictionary * _Nullable info) {
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NSError *const error = [info objectForKey:PHImageErrorKey];
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if (error) {
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[delegate URLRequest:cancellationBlock didCompleteWithError:error];
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return;
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}
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NSInteger const length = [imageData length];
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CFStringRef const dataUTIStringRef = (__bridge CFStringRef _Nonnull)(dataUTI);
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CFStringRef const mimeType = UTTypeCopyPreferredTagWithClass(dataUTIStringRef, kUTTagClassMIMEType);
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NSURLResponse *const response = [[NSURLResponse alloc] initWithURL:request.URL
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MIMEType:(__bridge NSString *)(mimeType)
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expectedContentLength:length
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textEncodingName:nil];
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CFRelease(mimeType);
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[delegate URLRequest:cancellationBlock didReceiveResponse:response];
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[delegate URLRequest:cancellationBlock didReceiveData:imageData];
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[delegate URLRequest:cancellationBlock didCompleteWithError:nil];
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}];
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return cancellationBlock;
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}
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- (void)cancelRequest:(id)requestToken
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{
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((void (^)(void))requestToken)();
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}
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@end
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