107 lines
2.6 KiB
Objective-C
Executable File
107 lines
2.6 KiB
Objective-C
Executable File
//
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// QNFile.m
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// QiniuSDK
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//
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// Created by bailong on 15/7/25.
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// Copyright (c) 2015年 Qiniu. All rights reserved.
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//
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#import "QNFile.h"
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#import "QNResponseInfo.h"
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@interface QNFile ()
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@property (nonatomic, readonly) NSString *filepath;
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@property (nonatomic) NSData *data;
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@property (readonly) int64_t fileSize;
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@property (readonly) int64_t fileModifyTime;
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@property (nonatomic) NSFileHandle *file;
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@end
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@implementation QNFile
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- (instancetype)init:(NSString *)path
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error:(NSError *__autoreleasing *)error {
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if (self = [super init]) {
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_filepath = path;
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NSError *error2 = nil;
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NSDictionary *fileAttr = [[NSFileManager defaultManager] attributesOfItemAtPath:path error:&error2];
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if (error2 != nil) {
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if (error != nil) {
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*error = error2;
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}
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return self;
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}
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_fileSize = [fileAttr fileSize];
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NSDate *modifyTime = fileAttr[NSFileModificationDate];
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int64_t t = 0;
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if (modifyTime != nil) {
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t = [modifyTime timeIntervalSince1970];
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}
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_fileModifyTime = t;
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NSFileHandle *f = nil;
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NSData *d = nil;
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//[NSData dataWithContentsOfFile:filePath options:NSDataReadingMappedIfSafe error:&error] 不能用在大于 200M的文件上，改用filehandle
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// 参见 https://issues.apache.org/jira/browse/CB-5790
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if (_fileSize > 16 * 1024 * 1024) {
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f = [NSFileHandle fileHandleForReadingAtPath:path];
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if (f == nil) {
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if (error != nil) {
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*error = [[NSError alloc] initWithDomain:path code:kQNFileError userInfo:nil];
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}
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return self;
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}
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} else {
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d = [NSData dataWithContentsOfFile:path options:NSDataReadingMappedIfSafe error:&error2];
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if (error2 != nil) {
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if (error != nil) {
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*error = error2;
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}
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return self;
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}
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}
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_file = f;
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_data = d;
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}
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return self;
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}
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- (NSData *)read:(long)offset
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size:(long)size {
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if (_data != nil) {
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return [_data subdataWithRange:NSMakeRange(offset, (unsigned int)size)];
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}
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[_file seekToFileOffset:offset];
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return [_file readDataOfLength:size];
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}
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- (NSData *)readAll {
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return [self read:0 size:(long)_fileSize];
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}
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- (void)close {
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if (_file != nil) {
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[_file closeFile];
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}
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}
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- (NSString *)path {
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return _filepath;
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}
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- (int64_t)modifyTime {
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return _fileModifyTime;
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}
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- (int64_t)size {
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return _fileSize;
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}
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@end
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