#define SYSTEM_VERSION_EQUAL_TO(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedSame)

#define SYSTEM_VERSION_GREATER_THAN(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedDescending)

#define SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] != NSOrderedAscending)

#import "NSURL+Common.h"

#import <sys/xattr.h>

@implementation NSURL (Common)

+(BOOL)addSkipBackupAttributeToItemAtURL:(NSURL *)URL

{

if ([[NSFileManager defaultManager] fileExistsAtPath: [URL path]])

{

if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"5.1")) {

NSError *error = nil;

BOOL success = [URL setResourceValue: [NSNumber numberWithBool: YES] forKey: NSURLIsExcludedFromBackupKey error: &error];

if(error){

DebugLog(@"addSkipBackupAttributeToItemAtURL: %@, error: %@", [URL lastPathComponent], error);

}

return success;

}

if (SYSTEM_VERSION_GREATER_THAN(@"5.0")) {

const char* filePath = [[URL path] fileSystemRepresentation];

const char* attrName = "com.apple.MobileBackup";

u_int8_t attrValue = 1;

int result = setxattr(filePath, attrName, &attrValue, sizeof(attrValue), 0, 0);

return result == 0;

}

}

return NO;

}

- (NSDictionary *)queryParams{

NSMutableDictionary *params = [[NSMutableDictionary alloc] init];

for (NSString *param in [[self query] componentsSeparatedByString:@"&"]) {

NSArray *elts = [param componentsSeparatedByString:@"="];

if([elts count] < 2) continue;

[params setObject:elts[1] forKey:elts[0]];

}

return params;

}