每个人。
我有一个遗留系统，它通过经典的用户名/密码模式对用户进行身份验证。现在我需要从这个系统向 iPhone App 提供数据。这个应用程序会向我发送设备 ID (UDID)。
我的问题是：如何将现有的用户帐户连接到那些 UDID？有什么策略让用户告诉我“这是我的 UDID，我的帐户是 XXXX”？
这些是我可以想象的情况：
实际上，我不想强迫用户在这个系统上创建帐户。但是如果他/她这样做了，我需要通过某种方式来识别他/她。
感谢您的任何想法。
您可以使用 OpenUDID 项目来制作您自己的 UDID，之后它非常简单，如果用户有一个帐户，只需使用同步按钮（所以感觉不像登录）并询问他他们的帐户，每次用户启动您在数据库中搜索设备 ID 的应用程序，如果存在，您登录他，如果不创建帐户并给他一些帐户检索选项，您使用的模式很容易出错。
我真的建议你检查 www.parse.com，它会将当前用户会话保存在缓存中，因此它永远不必登录，它会以一种非常优雅和灵活的方式处理跨平台的安装
#import <Foundation/Foundation.h>
//
// Usage:
// #include "OpenUDID.h"
// NSString* openUDID = [OpenUDID value];
//
#define kOpenUDIDErrorNone 0
#define kOpenUDIDErrorOptedOut 1
#define kOpenUDIDErrorCompromised 2
@interface Countly_OpenUDID : NSObject {
}
+ (NSString*) value;
+ (NSString*) valueWithError:(NSError**)error;
+ (void) setOptOut:(BOOL)optOutValue;
@end
#if __has_feature(objc_arc)
#error This file uses the classic non-ARC retain/release model; hints below...
// to selectively compile this file as non-ARC, do as follows:
// https://img.skitch.com/20120717-g3ag5h9a6ehkgpmpjiuen3qpwp.png
#endif
#import "Countly_OpenUDID.h"
#import <CommonCrypto/CommonDigest.h> // Need to import for CC_MD5 access
#if TARGET_OS_IPHONE || TARGET_IPHONE_SIMULATOR
#import <UIKit/UIPasteboard.h>
#import <UIKit/UIKit.h>
#else
#import <AppKit/NSPasteboard.h>
#endif
#define OpenUDIDLog(fmt, ...)
//#define OpenUDIDLog(fmt, ...) NSLog((@"%s [Line %d] " fmt), __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__);
//#define OpenUDIDLog(fmt, ...) NSLog((@"[Line %d] " fmt), __LINE__, ##__VA_ARGS__);
static NSString * kOpenUDIDSessionCache = nil;
static NSString * const kOpenUDIDKey = @"OpenUDID";
static NSString * const kOpenUDIDSlotKey = @"OpenUDID_slot";
static NSString * const kOpenUDIDAppUIDKey = @"OpenUDID_appUID";
static NSString * const kOpenUDIDTSKey = @"OpenUDID_createdTS";
static NSString * const kOpenUDIDOOTSKey = @"OpenUDID_optOutTS";
static NSString * const kOpenUDIDDomain = @"org.OpenUDID";
static NSString * const kOpenUDIDSlotPBPrefix = @"org.OpenUDID.slot.";
static int const kOpenUDIDRedundancySlots = 100;
@interface Countly_OpenUDID (Private)
+ (void) _setDict:(id)dict forPasteboard:(id)pboard;
+ (NSMutableDictionary*) _getDictFromPasteboard:(id)pboard;
+ (NSString*) _generateFreshOpenUDID;
@end
@implementation Countly_OpenUDID
// Archive a NSDictionary inside a pasteboard of a given type
// Convenience method to support iOS & Mac OS X
//
+ (void) _setDict:(id)dict forPasteboard:(id)pboard {
#if TARGET_OS_IPHONE || TARGET_IPHONE_SIMULATOR
[pboard setData:[NSKeyedArchiver archivedDataWithRootObject:dict] forPasteboardType:kOpenUDIDDomain];
#else
[pboard setData:[NSKeyedArchiver archivedDataWithRootObject:dict] forType:kOpenUDIDDomain];
#endif
}
// Retrieve an NSDictionary from a pasteboard of a given type
// Convenience method to support iOS & Mac OS X
//
+ (NSMutableDictionary*) _getDictFromPasteboard:(id)pboard {
#if TARGET_OS_IPHONE || TARGET_IPHONE_SIMULATOR
id item = [pboard dataForPasteboardType:kOpenUDIDDomain];
#else
id item = [pboard dataForType:kOpenUDIDDomain];
#endif
if (item) {
@try{
item = [NSKeyedUnarchiver unarchiveObjectWithData:item];
} @catch(NSException* e) {
OpenUDIDLog(@"Unable to unarchive item %@ on pasteboard!", [pboard name]);
item = nil;
}
}
// return an instance of a MutableDictionary
return [NSMutableDictionary dictionaryWithDictionary:(item == nil || [item isKindOfClass:[NSDictionary class]]) ? item : nil];
}
// Private method to create and return a new OpenUDID
// Theoretically, this function is called once ever per application when calling [OpenUDID value] for the first time.
// After that, the caching/pasteboard/redundancy mechanism inside [OpenUDID value] returns a persistent and cross application OpenUDID
//
+ (NSString*) _generateFreshOpenUDID {
NSString* _openUDID = nil;
// August 2011: One day, this may no longer be allowed in iOS. When that is, just comment this line out.
// March 25th 2012: this day has come, let's remove this "outlawed" call...
#if TARGET_OS_IPHONE
// if([UIDevice instancesRespondToSelector:@selector(uniqueIdentifier)]){
// _openUDID = [[UIDevice currentDevice] uniqueIdentifier];
// }
#endif
// Next we generate a UUID.
// UUIDs (Universally Unique Identifiers), also known as GUIDs (Globally Unique Identifiers) or IIDs
// (Interface Identifiers), are 128-bit values guaranteed to be unique. A UUID is made unique over
// both space and time by combining a value unique to the computer on which it was generated—usually the
// Ethernet hardware address—and a value representing the number of 100-nanosecond intervals since
// October 15, 1582 at 00:00:00.
// We then hash this UUID with md5 to get 32 bytes, and then add 4 extra random bytes
// Collision is possible of course, but unlikely and suitable for most industry needs (e.g. aggregate tracking)
//
if (_openUDID==nil) {
CFUUIDRef uuid = CFUUIDCreate(kCFAllocatorDefault);
CFStringRef cfstring = CFUUIDCreateString(kCFAllocatorDefault, uuid);
const char *cStr = CFStringGetCStringPtr(cfstring,CFStringGetFastestEncoding(cfstring));
unsigned char result[16];
CC_MD5( cStr, strlen(cStr), result );
CFRelease(uuid);
_openUDID = [NSString stringWithFormat:
@"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%08x",
result[0], result[1], result[2], result[3],
result[4], result[5], result[6], result[7],
result[8], result[9], result[10], result[11],
result[12], result[13], result[14], result[15],
(NSUInteger)(arc4random() % NSUIntegerMax)];
}
// Call to other developers in the Open Source community:
//
// feel free to suggest better or alternative "UDID" generation code above.
// NOTE that the goal is NOT to find a better hash method, but rather, find a decentralized (i.e. not web-based)
// 160 bits / 20 bytes random string generator with the fewest possible collisions.
//
return _openUDID;
}
// Main public method that returns the OpenUDID
// This method will generate and store the OpenUDID if it doesn't exist, typically the first time it is called
// It will return the null udid (forty zeros) if the user has somehow opted this app out (this is subject to 3rd party implementation)
// Otherwise, it will register the current app and return the OpenUDID
//
+ (NSString*) value {
return [Countly_OpenUDID valueWithError:nil];
}
+ (NSString*) valueWithError:(NSError **)error {
if (kOpenUDIDSessionCache!=nil) {
if (error!=nil)
*error = [NSError errorWithDomain:kOpenUDIDDomain
code:kOpenUDIDErrorNone
userInfo:[NSDictionary dictionaryWithObjectsAndKeys:@"OpenUDID in cache from first call",@"description", nil]];
return kOpenUDIDSessionCache;
}
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
// The AppUID will uniquely identify this app within the pastebins
//
NSString * appUID = (NSString *) [defaults objectForKey:kOpenUDIDAppUIDKey];
if(appUID == nil)
{
// generate a new uuid and store it in user defaults
CFUUIDRef uuid = CFUUIDCreate(NULL);
appUID = (NSString *) CFUUIDCreateString(NULL, uuid);
CFRelease(uuid);
}
NSString* openUDID = nil;
NSString* myRedundancySlotPBid = nil;
NSDate* optedOutDate = nil;
BOOL optedOut = NO;
BOOL saveLocalDictToDefaults = NO;
BOOL isCompromised = NO;
// Do we have a local copy of the OpenUDID dictionary?
// This local copy contains a copy of the openUDID, myRedundancySlotPBid (and unused in this block, the local bundleid, and the timestamp)
//
id localDict = [defaults objectForKey:kOpenUDIDKey];
if ([localDict isKindOfClass:[NSDictionary class]]) {
localDict = [NSMutableDictionary dictionaryWithDictionary:localDict]; // we might need to set/overwrite the redundancy slot
openUDID = [localDict objectForKey:kOpenUDIDKey];
myRedundancySlotPBid = [localDict objectForKey:kOpenUDIDSlotKey];
optedOutDate = [localDict objectForKey:kOpenUDIDOOTSKey];
optedOut = optedOutDate!=nil;
OpenUDIDLog(@"localDict = %@",localDict);
}
// Here we go through a sequence of slots, each of which being a UIPasteboard created by each participating app
// The idea behind this is to both multiple and redundant representations of OpenUDIDs, as well as serve as placeholder for potential opt-out
//
NSString* availableSlotPBid = nil;
NSMutableDictionary* frequencyDict = [NSMutableDictionary dictionaryWithCapacity:kOpenUDIDRedundancySlots];
for (int n=0; n<kOpenUDIDRedundancySlots; n++) {
NSString* slotPBid = [NSString stringWithFormat:@"%@%d",kOpenUDIDSlotPBPrefix,n];
#if TARGET_OS_IPHONE || TARGET_IPHONE_SIMULATOR
UIPasteboard* slotPB = [UIPasteboard pasteboardWithName:slotPBid create:NO];
#else
NSPasteboard* slotPB = [NSPasteboard pasteboardWithName:slotPBid];
#endif
OpenUDIDLog(@"SlotPB name = %@",slotPBid);
if (slotPB==nil) {
// assign availableSlotPBid to be the first one available
if (availableSlotPBid==nil) availableSlotPBid = slotPBid;
} else {
NSDictionary* dict = [Countly_OpenUDID _getDictFromPasteboard:slotPB];
NSString* oudid = [dict objectForKey:kOpenUDIDKey];
OpenUDIDLog(@"SlotPB dict = %@",dict);
if (oudid==nil) {
// availableSlotPBid could inside a non null slot where no oudid can be found
if (availableSlotPBid==nil) availableSlotPBid = slotPBid;
} else {
// increment the frequency of this oudid key
int count = [[frequencyDict valueForKey:oudid] intValue];
[frequencyDict setObject:[NSNumber numberWithInt:++count] forKey:oudid];
}
// if we have a match with the app unique id,
// then let's look if the external UIPasteboard representation marks this app as OptedOut
NSString* gid = [dict objectForKey:kOpenUDIDAppUIDKey];
if (gid!=nil && [gid isEqualToString:appUID]) {
myRedundancySlotPBid = slotPBid;
// the local dictionary is prime on the opt-out subject, so ignore if already opted-out locally
if (optedOut) {
optedOutDate = [dict objectForKey:kOpenUDIDOOTSKey];
optedOut = optedOutDate!=nil;
}
}
}
}
// sort the Frequency dict with highest occurence count of the same OpenUDID (redundancy, failsafe)
// highest is last in the list
//
NSArray* arrayOfUDIDs = [frequencyDict keysSortedByValueUsingSelector:@selector(compare:)];
NSString* mostReliableOpenUDID = (arrayOfUDIDs!=nil && [arrayOfUDIDs count]>0)? [arrayOfUDIDs lastObject] : nil;
OpenUDIDLog(@"Freq Dict = %@\nMost reliable %@",frequencyDict,mostReliableOpenUDID);
// if openUDID was not retrieved from the local preferences, then let's try to get it from the frequency dictionary above
//
if (openUDID==nil) {
if (mostReliableOpenUDID==nil) {
// this is the case where this app instance is likely to be the first one to use OpenUDID on this device
// we create the OpenUDID, legacy or semi-random (i.e. most certainly unique)
//
openUDID = [Countly_OpenUDID _generateFreshOpenUDID];
} else {
// or we leverage the OpenUDID shared by other apps that have already gone through the process
//
openUDID = mostReliableOpenUDID;
}
// then we create a local representation
//
if (localDict==nil) {
localDict = [NSMutableDictionary dictionaryWithCapacity:4];
[localDict setObject:openUDID forKey:kOpenUDIDKey];
[localDict setObject:appUID forKey:kOpenUDIDAppUIDKey];
[localDict setObject:[NSDate date] forKey:kOpenUDIDTSKey];
if (optedOut) [localDict setObject:optedOutDate forKey:kOpenUDIDTSKey];
saveLocalDictToDefaults = YES;
}
}
else {
// Sanity/tampering check
//
if (mostReliableOpenUDID!=nil && ![mostReliableOpenUDID isEqualToString:openUDID])
isCompromised = YES;
}
// Here we store in the available PB slot, if applicable
//
OpenUDIDLog(@"Available Slot %@ Existing Slot %@",availableSlotPBid,myRedundancySlotPBid);
if (availableSlotPBid!=nil && (myRedundancySlotPBid==nil || [availableSlotPBid isEqualToString:myRedundancySlotPBid])) {
#if TARGET_OS_IPHONE || TARGET_IPHONE_SIMULATOR
UIPasteboard* slotPB = [UIPasteboard pasteboardWithName:availableSlotPBid create:YES];
[slotPB setPersistent:YES];
#else
NSPasteboard* slotPB = [NSPasteboard pasteboardWithName:availableSlotPBid];
#endif
// save slotPBid to the defaults, and remember to save later
//
if (localDict) {
[localDict setObject:availableSlotPBid forKey:kOpenUDIDSlotKey];
saveLocalDictToDefaults = YES;
}
// Save the local dictionary to the corresponding UIPasteboard slot
//
if (openUDID && localDict)
[Countly_OpenUDID _setDict:localDict forPasteboard:slotPB];
}
// Save the dictionary locally if applicable
//
if (localDict && saveLocalDictToDefaults)
[defaults setObject:localDict forKey:kOpenUDIDKey];
// If the UIPasteboard external representation marks this app as opted-out, then to respect privacy, we return the ZERO OpenUDID, a sequence of 40 zeros...
// This is a *new* case that developers have to deal with. Unlikely, statistically low, but still.
// To circumvent this and maintain good tracking (conversion ratios, etc.), developers are invited to calculate how many of their users have opted-out from the full set of users.
// This ratio will let them extrapolate convertion ratios more accurately.
//
if (optedOut) {
if (error!=nil) *error = [NSError errorWithDomain:kOpenUDIDDomain
code:kOpenUDIDErrorOptedOut
userInfo:[NSDictionary dictionaryWithObjectsAndKeys:[NSString stringWithFormat:@"Application with unique id %@ is opted-out from OpenUDID as of %@",appUID,optedOutDate],@"description", nil]];
kOpenUDIDSessionCache = [[NSString stringWithFormat:@"%040x",0] retain];
return kOpenUDIDSessionCache;
}
// return the well earned openUDID!
//
if (error!=nil) {
if (isCompromised)
*error = [NSError errorWithDomain:kOpenUDIDDomain
code:kOpenUDIDErrorCompromised
userInfo:[NSDictionary dictionaryWithObjectsAndKeys:@"Found a discrepancy between stored OpenUDID (reliable) and redundant copies; one of the apps on the device is most likely corrupting the OpenUDID protocol",@"description", nil]];
else
*error = [NSError errorWithDomain:kOpenUDIDDomain
code:kOpenUDIDErrorNone
userInfo:[NSDictionary dictionaryWithObjectsAndKeys:@"OpenUDID succesfully retrieved",@"description", nil]];
}
kOpenUDIDSessionCache = [openUDID retain];
return kOpenUDIDSessionCache;
}
+ (void) setOptOut:(BOOL)optOutValue {
// init call
[Countly_OpenUDID value];
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
// load the dictionary from local cache or create one
id dict = [defaults objectForKey:kOpenUDIDKey];
if ([dict isKindOfClass:[NSDictionary class]]) {
dict = [NSMutableDictionary dictionaryWithDictionary:dict];
} else {
dict = [NSMutableDictionary dictionaryWithCapacity:2];
}
// set the opt-out date or remove key, according to parameter
if (optOutValue)
[dict setObject:[NSDate date] forKey:kOpenUDIDOOTSKey];
else
[dict removeObjectForKey:kOpenUDIDOOTSKey];
// store the dictionary locally
[defaults setObject:dict forKey:kOpenUDIDKey];
OpenUDIDLog(@"Local dict after opt-out = %@",dict);
// reset memory cache
kOpenUDIDSessionCache = nil;
}
@end