mirror of
https://github.com/zhigang1992/react-native.git
synced 2026-04-24 04:16:00 +08:00
Updates from Thu 26 Mar
- [React Native] Fix incorrect if-statement in RCTGeolocation | Alex Akers - [ReactNative] s/ReactKit/React/g | Tadeu Zagallo - [React Native] View border support | Nick Lockwood - [Assets] Allow scripts to override assetRoots | Amjad Masad - [ReactNative] Navigator docs | Eric Vicenti - [ReactNative] License headers and renaming | Eric Vicenti - [React Native] Add CocoaPods spec | Tadeu Zagallo - Added explicit types for all view properties | Nick Lockwood - [ReactNative] s/ReactNavigator/Navigator/ | Tadeu Zagallo - [ReactNative] Add copyright header for code copied from the jQuery UI project | Martin Konicek - [ReactNative] PanResponder documentation | Eric Vicenti
This commit is contained in:
Christopher Chedeau
231
React/Base/RCTCache.m
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231
React/Base/RCTCache.m
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/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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#import "RCTCache.h"
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#import <UIKit/UIKit.h>
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#import <sys/xattr.h>
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static NSString *const RCTCacheSubdirectoryName = @"React";
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static NSString *const RCTKeyExtendedAttributeName = @"com.facebook.React.RCTCacheManager.Key";
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static NSMapTable *RCTLivingCachesByName;
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static NSError *RCTPOSIXError(int errorNumber)
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{
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NSDictionary *userInfo = @{
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NSLocalizedDescriptionKey: @(strerror(errorNumber))
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};
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return [NSError errorWithDomain:NSPOSIXErrorDomain code:errorNumber userInfo:userInfo];
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}
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static NSString *RCTGetExtendedAttribute(NSURL *fileURL, NSString *key, NSError **error)
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{
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const char *path = fileURL.fileSystemRepresentation;
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ssize_t length = getxattr(path, key.UTF8String, NULL, 0, 0, 0);
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if (length <= 0) {
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if (error) *error = RCTPOSIXError(errno);
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return nil;
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}
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char *buffer = malloc(length);
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length = getxattr(path, key.UTF8String, buffer, length, 0, 0);
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if (length > 0) {
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return [[NSString alloc] initWithBytesNoCopy:buffer length:length encoding:NSUTF8StringEncoding freeWhenDone:YES];
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}
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free(buffer);
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if (error) *error = RCTPOSIXError(errno);
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return nil;
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}
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static BOOL RCTSetExtendedAttribute(NSURL *fileURL, NSString *key, NSString *value, NSError **error)
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{
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const char *path = fileURL.fileSystemRepresentation;
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int result;
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if (value) {
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const char *valueUTF8String = value.UTF8String;
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result = setxattr(path, key.UTF8String, valueUTF8String, strlen(valueUTF8String), 0, 0);
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} else {
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result = removexattr(path, key.UTF8String, 0);
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}
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if (result) {
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if (error) *error = RCTPOSIXError(errno);
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return NO;
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}
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return YES;
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}
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#pragma mark - Cache Record -
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@interface RCTCacheRecord : NSObject
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@property (readonly) NSUUID *UUID;
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@property (readonly, weak) dispatch_queue_t queue;
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@property (nonatomic, copy) NSData *data;
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@end
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@implementation RCTCacheRecord
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- (instancetype)initWithUUID:(NSUUID *)UUID
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{
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if ((self = [super init])) {
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_UUID = [UUID copy];
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}
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return self;
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}
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- (void)enqueueBlock:(dispatch_block_t)block
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{
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dispatch_queue_t queue = _queue;
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if (!queue) {
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NSString *queueName = [NSString stringWithFormat:@"com.facebook.React.RCTCache.%@", _UUID.UUIDString];
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queue = dispatch_queue_create(queueName.UTF8String, DISPATCH_QUEUE_SERIAL);
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_queue = queue;
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}
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dispatch_async(queue, block);
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}
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@end
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#pragma mark - Cache
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@implementation RCTCache
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{
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NSString *_name;
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NSFileManager *_fileManager;
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NSMutableDictionary *_storage;
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NSURL *_cacheDirectoryURL;
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}
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+ (void)initialize
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{
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if (self == [RCTCache class]) {
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RCTLivingCachesByName = [NSMapTable strongToWeakObjectsMapTable];
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}
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}
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- (instancetype)init
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{
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return [self initWithName:@"default"];
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}
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- (instancetype)initWithName:(NSString *)name
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{
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NSParameterAssert(name.length < NAME_MAX);
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RCTCache *cachedCache = [RCTLivingCachesByName objectForKey:name];
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if (cachedCache) {
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self = cachedCache;
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return self;
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}
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if ((self = [super init])) {
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_name = [name copy];
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_fileManager = [[NSFileManager alloc] init];
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_storage = [NSMutableDictionary dictionary];
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NSURL *cacheDirectoryURL = [[_fileManager URLsForDirectory:NSCachesDirectory inDomains:NSUserDomainMask] lastObject];
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cacheDirectoryURL = [cacheDirectoryURL URLByAppendingPathComponent:RCTCacheSubdirectoryName isDirectory:YES];
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_cacheDirectoryURL = [cacheDirectoryURL URLByAppendingPathComponent:name isDirectory:YES];
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[_fileManager createDirectoryAtURL:_cacheDirectoryURL withIntermediateDirectories:YES attributes:nil error:NULL];
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NSArray *fileURLs = [_fileManager contentsOfDirectoryAtURL:_cacheDirectoryURL includingPropertiesForKeys:nil options:NSDirectoryEnumerationSkipsHiddenFiles error:NULL];
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for (NSURL *fileURL in fileURLs) {
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NSUUID *UUID = [[NSUUID alloc] initWithUUIDString:fileURL.lastPathComponent];
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if (!UUID) continue;
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NSString *key = RCTGetExtendedAttribute(fileURL, RCTKeyExtendedAttributeName, NULL);
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if (!key) {
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[_fileManager removeItemAtURL:fileURL error:NULL];
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continue;
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}
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_storage[key] = [[RCTCacheRecord alloc] initWithUUID:UUID];
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}
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}
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return self;
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}
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- (BOOL)hasDataForKey:(NSString *)key
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{
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return _storage[key] != nil;
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}
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- (void)fetchDataForKey:(NSString *)key completionHandler:(void (^)(NSData *))completionHandler
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{
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NSParameterAssert(key.length > 0);
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NSParameterAssert(completionHandler != nil);
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RCTCacheRecord *record = _storage[key];
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if (!record) {
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completionHandler(nil);
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return;
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}
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[record enqueueBlock:^{
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if (!record.data) {
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record.data = [NSData dataWithContentsOfURL:[_cacheDirectoryURL URLByAppendingPathComponent:record.UUID.UUIDString]];
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}
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completionHandler(record.data);
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}];
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}
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- (void)setData:(NSData *)data forKey:(NSString *)key
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{
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NSParameterAssert(key.length > 0);
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RCTCacheRecord *record = _storage[key];
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if (!record) {
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if (!data) return;
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record = [[RCTCacheRecord alloc] initWithUUID:[NSUUID UUID]];
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_storage[key] = record;
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}
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NSURL *fileURL = [_cacheDirectoryURL URLByAppendingPathComponent:record.UUID.UUIDString];
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UIBackgroundTaskIdentifier identifier = [[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:nil];
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[record enqueueBlock:^{
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if (data) {
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[data writeToURL:fileURL options:NSDataWritingAtomic error:NULL];
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RCTSetExtendedAttribute(fileURL, RCTKeyExtendedAttributeName, key, NULL);
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} else {
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[_fileManager removeItemAtURL:fileURL error:NULL];
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}
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if (identifier != UIBackgroundTaskInvalid) {
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[[UIApplication sharedApplication] endBackgroundTask:identifier];
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}
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}];
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}
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- (void)removeAllData
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{
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UIBackgroundTaskIdentifier identifier = [[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:nil];
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dispatch_group_t group = dispatch_group_create();
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[_storage enumerateKeysAndObjectsUsingBlock:^(NSString *key, RCTCacheRecord *record, BOOL *stop) {
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NSURL *fileURL = [_cacheDirectoryURL URLByAppendingPathComponent:record.UUID.UUIDString];
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dispatch_group_async(group, record.queue, ^{
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[_fileManager removeItemAtURL:fileURL error:NULL];
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});
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}];
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if (identifier != UIBackgroundTaskInvalid) {
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dispatch_group_notify(group, dispatch_get_main_queue(), ^{
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[[UIApplication sharedApplication] endBackgroundTask:identifier];
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});
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}
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[_storage removeAllObjects];
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}
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@end
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