SQLITE database Uploading - ios

Question

Is there any way to upload , download to a server read the .sqlite file present in document directory from your iPhone application and use it as your database.
I tried by converting to binary data and uploading but the file is getting encrypted I cannot read or write it after restoring/downloading it from server.
Any suggestion?
Uploading task fetching the file
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *chatDatabasePath = [documentsDirectory stringByAppendingPathComponent:#"ChatDB.sqlite"];
NSString *contactDatabasePath = [documentsDirectory stringByAppendingPathComponent:#"ContactDB.sqlite"];
NSURL*ChatDB_url = [NSURL fileURLWithPath:chatDatabasePath];
NSURL*ContactDB_url = [NSURL fileURLWithPath:contactDatabasePath];
self.ChatDBData = [NSData dataWithContentsOfURL:ChatDB_url];
self.ContactDBData = [NSData dataWithContentsOfURL:ContactDB_url];
Uploading
-(void)UploadDbToServer:(NSData*)DB_Data ForDbName:(NSString*)dbName forExtension:(NSString*)extension andCallback:(void (^)(id))callback{
NSString *urlString = [[NSString alloc]initWithString:[NSString stringWithFormat:#"%#chat-backup-upload",baseUrl]];
urlString=[urlString stringByReplacingOccurrencesOfString:#" " withString:#"%20"];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:urlString]];
[request setCachePolicy:NSURLRequestReloadIgnoringLocalCacheData];
[request setHTTPShouldHandleCookies:NO];
[request setTimeoutInterval:100];
[request setHTTPMethod:#"POST"];
NSString *boundary = #"7MA4YWxkTrZu0gW";
// set Content-Type in HTTP header
NSString *contentType = [NSString stringWithFormat:#"multipart/form-data; boundary=%#",boundary];
[request setValue:contentType forHTTPHeaderField: #"Content-Type"];
// post body
NSMutableData *body = [NSMutableData data];
// add DB data
if (DB_Data) {
[body appendData:[[NSString stringWithFormat:#"--%#\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:#"Content-Disposition: form-data; name=\"DB\"; filename=\"%#.%#\"\r\n",dbName,extension] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[#"Content-Type: file/sqlite\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:DB_Data];
[body appendData:[[NSString stringWithFormat:#"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
}
[body appendData:[[NSString stringWithFormat:#"--%#--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
// setting the body of the post to the reqeust
[request setHTTPBody:body];
NSURLSessionConfiguration *sessionConf = [NSURLSessionConfiguration defaultSessionConfiguration];
NSURLSession *session = [NSURLSession sessionWithConfiguration:sessionConf];
NSURLSessionTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
id jsonResponse= [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:&error];
callback ((id) jsonResponse);
}];
[task resume];}
Downloading
(void)startDownload:(NSURL*)url {
NSURL *Url= [NSURL URLWithString:[NSString stringWithFormat:#"%#",url]];
NSOperationQueue *queue = [[NSOperationQueue alloc]init];
[queue setMaxConcurrentOperationCount:5];
self.activeUrlString=[NSString stringWithFormat:#"%#",Url];
if (!self.session) {
NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration backgroundSessionConfigurationWithIdentifier:#"image"];
self.session = [NSURLSession sessionWithConfiguration:configuration delegate:self delegateQueue:queue];
}
NSURLRequest* request = [NSURLRequest requestWithURL:Url];
self.task = [self.session downloadTaskWithRequest:request];
[self.task resume];}
Writing the downloaded file
-(void)URLSession:(NSURLSession *)session downloadTask:(NSURLSessionDownloadTask *)downloadTask didFinishDownloadingToURL:(NSURL *)location {
//saving the files
NSData *DBData = [NSData dataWithContentsOfURL:location];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *chatDatabasePath = [documentsDirectory stringByAppendingPathComponent:#"ChatDB.sqlite"];
NSString *contactDatabasePath = [documentsDirectory stringByAppendingPathComponent:#"ContactDB.sqlite"];
if ([self.activeDownload isEqualToString:#"chat"]){
[DBData writeToFile:chatDatabasePath atomically:YES];
self.activeDownload = #"contact";
[self startDownload:[NSURL URLWithString:[NSString stringWithFormat:#"%#%#",pingovaURL,self.ContactDB_URL]]];
}else{
[DBData writeToFile:contactDatabasePath atomically:YES]; }}