mirror of
https://github.com/samsonjs/arq_restore.git
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289 lines
10 KiB
Objective-C
289 lines
10 KiB
Objective-C
//
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// Commit.m
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// Backup
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//
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// Created by Stefan Reitshamer on 3/21/09.
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// Copyright 2009 PhotoMinds LLC. All rights reserved.
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//
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#import "IntegerIO.h"
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#import "DateIO.h"
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#import "StringIO.h"
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#import "Commit.h"
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#import "Blob.h"
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#import "DataInputStream.h"
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#import "RegexKitLite.h"
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#import "SetNSError.h"
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#import "NSErrorCodes.h"
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#import "CommitFailedFile.h"
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#import "BufferedInputStream.h"
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#import "BooleanIO.h"
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#import "DataIO.h"
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#import "BlobKey.h"
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#define HEADER_LENGTH (10)
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@interface Commit (internal)
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- (BOOL)readHeader:(BufferedInputStream *)is error:(NSError **)error;
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@end
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@implementation Commit
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+ (NSString *)errorDomain {
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return @"CommitErrorDomain";
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}
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@synthesize author = _author,
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comment = _comment,
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treeBlobKey = _treeBlobKey,
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parentCommitBlobKeys = _parentCommitBlobKeys,
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location = _location,
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computer = _computer,
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mergeCommonAncestorCommitBlobKey = _mergeCommonAncestorCommitBlobKey,
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creationDate = _creationDate,
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commitFailedFiles = _commitFailedFiles,
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bucketXMLData = _bucketXMLData;
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- (id)initWithCommit:(Commit *)theCommit parentCommitBlobKey:(BlobKey *)theParentBlobKey {
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if (self = [super init]) {
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_author = [[theCommit author] copy];
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_comment = [[theCommit comment] copy];
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if (theParentBlobKey != nil) {
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_parentCommitBlobKeys = [[NSSet alloc] initWithObjects:theParentBlobKey, nil];
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} else {
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_parentCommitBlobKeys = [[NSSet alloc] init];
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}
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_treeBlobKey = [[theCommit treeBlobKey] copy];
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_location = [[theCommit location] copy];
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_computer = [[theCommit computer] copy];
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_mergeCommonAncestorCommitBlobKey = nil;
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_creationDate = [[theCommit creationDate] copy];
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_commitFailedFiles = [[theCommit commitFailedFiles] copy];
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_bucketXMLData = [[theCommit bucketXMLData] copy];
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}
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return self;
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}
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- (id) initWithAuthor:(NSString *)theAuthor
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comment:(NSString *)theComment
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parentCommitBlobKeys:(NSSet *)theParentCommitBlobKeys
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treeBlobKey:(BlobKey *)theTreeBlobKey
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location:(NSString *)theLocation
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mergeCommonAncestorCommitBlobKey:(BlobKey *)theMergeCommonAncestorCommitBlobKey
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commitFailedFiles:(NSArray *)theCommitFailedFiles
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bucketXMLData:(NSData *)theBucketXMLData {
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if (self = [super init]) {
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_author = [theAuthor copy];
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_comment = [theComment copy];
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_parentCommitBlobKeys = [[NSSet alloc] initWithSet:theParentCommitBlobKeys];
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_treeBlobKey = [theTreeBlobKey retain];
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_location = [theLocation copy];
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NSRange computerRange = [_location rangeOfRegex:@"^file://([^/]+)/" capture:1];
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if (computerRange.location != NSNotFound) {
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_computer = [[_location substringWithRange:computerRange] stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
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} else {
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_computer = @"";
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}
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[_computer retain];
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_mergeCommonAncestorCommitBlobKey = [theMergeCommonAncestorCommitBlobKey retain];
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_creationDate = [[NSDate alloc] init];
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_commitFailedFiles = [theCommitFailedFiles copy];
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_bucketXMLData = [theBucketXMLData copy];
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}
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return self;
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}
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- (id)initWithBufferedInputStream:(BufferedInputStream *)is error:(NSError **)error {
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if (self = [super init]) {
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_parentCommitBlobKeys = [[NSMutableSet alloc] init];
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if (![self readHeader:is error:error]) {
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goto init_error;
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}
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if (![StringIO read:&_author from:is error:error]) {
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goto init_error;
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}
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[_author retain];
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if (![StringIO read:&_comment from:is error:error]) {
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goto init_error;
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}
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[_comment retain];
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uint64_t parentCommitKeyCount = 0;
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if (![IntegerIO readUInt64:&parentCommitKeyCount from:is error:error]) {
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goto init_error;
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}
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for (uint64_t i = 0; i < parentCommitKeyCount; i++) {
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NSString *key;
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BOOL cryptoKeyStretched = NO;
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if (![StringIO read:&key from:is error:error]) {
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goto init_error;
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}
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if (commitVersion >= 4) {
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if (![BooleanIO read:&cryptoKeyStretched from:is error:error]) {
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goto init_error;
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}
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}
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BlobKey *parentBlobKey = [[BlobKey alloc] initWithSHA1:key stretchEncryptionKey:cryptoKeyStretched];
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[_parentCommitBlobKeys addObject:parentBlobKey];
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[parentBlobKey release];
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}
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NSString *treeSHA1 = nil;
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BOOL treeStretchedKey = NO;
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if (![StringIO read:&treeSHA1 from:is error:error]) {
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goto init_error;
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}
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if (commitVersion >= 4) {
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if (![BooleanIO read:&treeStretchedKey from:is error:error]) {
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goto init_error;
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}
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}
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_treeBlobKey = [[BlobKey alloc] initWithSHA1:treeSHA1 stretchEncryptionKey:treeStretchedKey];
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if (![StringIO read:&_location from:is error:error]) {
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goto init_error;
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}
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[_location retain];
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NSRange computerRange = [_location rangeOfRegex:@"^file://([^/]+)/" capture:1];
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if (computerRange.location != NSNotFound) {
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_computer = [[_location substringWithRange:computerRange] stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
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} else {
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_computer = @"";
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}
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[_computer retain];
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NSString *mergeCommonAncestorCommitSHA1 = nil;
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BOOL mergeCommonAncestorCommitStretchedKey = NO;
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if (![StringIO read:&mergeCommonAncestorCommitSHA1 from:is error:error]) {
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goto init_error;
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}
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if (commitVersion >= 4) {
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if (![BooleanIO read:&mergeCommonAncestorCommitStretchedKey from:is error:error]) {
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goto init_error;
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}
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}
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if (mergeCommonAncestorCommitSHA1 != nil) {
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_mergeCommonAncestorCommitBlobKey = [[BlobKey alloc] initWithSHA1:mergeCommonAncestorCommitSHA1 stretchEncryptionKey:mergeCommonAncestorCommitStretchedKey];
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}
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if (![DateIO read:&_creationDate from:is error:error]) {
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goto init_error;
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}
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[_creationDate retain];
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if (commitVersion >= 3) {
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uint64_t commitFailedFileCount = 0;
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if (![IntegerIO readUInt64:&commitFailedFileCount from:is error:error]) {
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goto init_error;
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}
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NSMutableArray *commitFailedFiles = [NSMutableArray array];
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for (uint64_t index = 0; index < commitFailedFileCount; index++) {
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CommitFailedFile *cff = [[CommitFailedFile alloc] initWithInputStream:is error:error];
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if (cff == nil) {
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goto init_error;
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}
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[commitFailedFiles addObject:cff];
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[cff release];
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}
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_commitFailedFiles = [commitFailedFiles retain];
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}
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if (commitVersion >= 5) {
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if (![DataIO read:&_bucketXMLData from:is error:error]) {
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goto init_error;
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}
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[_bucketXMLData retain];
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}
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}
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goto init_done;
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init_error:
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[self release];
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self = nil;
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init_done:
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return self;
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}
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- (void)release {
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[super release];
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}
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- (void)dealloc {
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[_author release];
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[_comment release];
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[_parentCommitBlobKeys release];
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[_treeBlobKey release];
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[_location release];
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[_computer release];
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[_mergeCommonAncestorCommitBlobKey release];
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[_creationDate release];
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[_commitFailedFiles release];
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[_bucketXMLData release];
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[super dealloc];
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}
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- (NSNumber *)isMergeCommit {
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return [NSNumber numberWithBool:([_parentCommitBlobKeys count] > 1)];
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}
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- (Blob *)toBlob {
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Blob *ret = nil;
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NSMutableData *data = [[NSMutableData alloc] init];
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char header[HEADER_LENGTH + 1];
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sprintf(header, "CommitV%03d", CURRENT_COMMIT_VERSION);
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[data appendBytes:header length:HEADER_LENGTH];
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[StringIO write:_author to:data];
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[StringIO write:_comment to:data];
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uint64_t parentCommitBlobKeysCount = (uint64_t)[_parentCommitBlobKeys count];
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[IntegerIO writeUInt64:parentCommitBlobKeysCount to:data];
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for (BlobKey *parentCommitBlobKey in _parentCommitBlobKeys) {
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[StringIO write:[parentCommitBlobKey sha1] to:data];
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[BooleanIO write:[parentCommitBlobKey stretchEncryptionKey] to:data];
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}
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[StringIO write:[_treeBlobKey sha1] to:data];
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[BooleanIO write:[_treeBlobKey stretchEncryptionKey] to:data];
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[StringIO write:_location to:data];
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[StringIO write:[_mergeCommonAncestorCommitBlobKey sha1] to:data];
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[BooleanIO write:[_mergeCommonAncestorCommitBlobKey stretchEncryptionKey] to:data];
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[DateIO write:_creationDate to:data];
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uint64_t commitFailedFilesCount = (uint64_t)[_commitFailedFiles count];
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[IntegerIO writeUInt64:commitFailedFilesCount to:data];
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for (CommitFailedFile *cff in _commitFailedFiles) {
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[cff writeTo:data];
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}
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[DataIO write:_bucketXMLData to:data];
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ret = [[[Blob alloc] initWithData:data mimeType:@"binary/octet-stream" downloadName:@"commit" dataDescription:@"commit"] autorelease];
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[data release];
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return ret;
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}
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#pragma mark NSObject
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- (NSString *)description {
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return [NSString stringWithFormat:@"<Commit: created=%@ tree=%@ parents=%@>", _creationDate, _treeBlobKey, _parentCommitBlobKeys];
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}
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@end
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@implementation Commit (internal)
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- (BOOL)readHeader:(BufferedInputStream *)is error:(NSError **)error {
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BOOL ret = NO;
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unsigned char *buf = (unsigned char *)malloc(HEADER_LENGTH);
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if (![is readExactly:HEADER_LENGTH into:buf error:error]) {
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goto readHeader_error;
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}
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NSString *header = [[[NSString alloc] initWithBytes:buf length:HEADER_LENGTH encoding:NSASCIIStringEncoding] autorelease];
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NSRange versionRange = [header rangeOfRegex:@"^CommitV(\\d{3})$" capture:1];
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commitVersion = 0;
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if (versionRange.location != NSNotFound) {
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NSNumberFormatter *nf = [[NSNumberFormatter alloc] init];
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NSNumber *number = [nf numberFromString:[header substringWithRange:versionRange]];
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commitVersion = [number intValue];
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[nf release];
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}
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if (commitVersion > CURRENT_COMMIT_VERSION || commitVersion < 2) {
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SETNSERROR([Commit errorDomain], ERROR_INVALID_OBJECT_VERSION, @"invalid Commit header");
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goto readHeader_error;
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}
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ret = YES;
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readHeader_error:
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free(buf);
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return ret;
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}
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@end
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