I'm not able to resume download task in NSURLSession - ios

Question

I have create a demo for downloading a file from the server it is working fine with foreground and background, but when I'm going to resume it, It will giving below Error
I have stcuk here could help me so solved it, I search in internet but I couldn't find anything helpful.
Download file and Pause Downlaod is working fine I have issue to resume it.
Task <3AE5BF24-3A4E-4713-8FC2-A0032022C913>.<6> finished with error [-3003] Error Domain=NSURLErrorDomain Code=-3003 "(null)" UserInfo={_NSURLErrorRelatedURLSessionTaskErrorKey=(
"BackgroundDownloadTask <3AE5BF24-3A4E-4713-8FC2-A0032022C913>.<6>"
), _NSURLErrorFailingURLSessionTaskErrorKey=BackgroundDownloadTask <3AE5BF24-3A4E-4713-8FC2-A0032022C913>.<6>}
Here is the final Xcode project
Downlaod xcode project
#import "NSURLSession+ResumeData.h"
#import <UIKit/UIKit.h>
#define IS_IOS10ORLATER ([[[UIDevice currentDevice] systemVersion] floatValue] >= 10)
#pragma mark- private
static NSData * correctRequestData(NSData *data) {
if (!data) {
return nil;
}
// return the same data if it's correct
if ([NSKeyedUnarchiver unarchiveObjectWithData:data] != nil) {
return data;
}
NSMutableDictionary *archive = [[NSPropertyListSerialization propertyListWithData:data options:NSPropertyListMutableContainersAndLeaves format:nil error:nil] mutableCopy];
if (!archive) {
return nil;
}
NSInteger k = 0;
id objectss = archive[#"$objects"];
while ([objectss[1] objectForKey:[NSString stringWithFormat:#"$%ld",k]] != nil) {
k += 1;
}
NSInteger i = 0;
while ([archive[#"$objects"][1] objectForKey:[NSString stringWithFormat:#"__nsurlrequest_proto_prop_obj_%ld",i]] != nil) {
NSMutableArray *arr = archive[#"$objects"];
NSMutableDictionary *dic = arr[1];
id obj = [dic objectForKey:[NSString stringWithFormat:#"__nsurlrequest_proto_prop_obj_%ld",i]];
if (obj) {
[dic setValue:obj forKey:[NSString stringWithFormat:#"$%ld",i+k]];
[dic removeObjectForKey:[NSString stringWithFormat:#"__nsurlrequest_proto_prop_obj_%ld",i]];
[arr replaceObjectAtIndex:1 withObject:dic];
archive[#"$objects"] = arr;
}
i++;
}
if ([archive[#"$objects"][1] objectForKey:#"__nsurlrequest_proto_props"] != nil) {
NSMutableArray *arr = archive[#"$objects"];
NSMutableDictionary *dic = arr[1];
id obj = [dic objectForKey:#"__nsurlrequest_proto_props"];
if (obj) {
[dic setValue:obj forKey:[NSString stringWithFormat:#"$%ld",i+k]];
[dic removeObjectForKey:#"__nsurlrequest_proto_props"];
[arr replaceObjectAtIndex:1 withObject:dic];
archive[#"$objects"] = arr;
}
}
// Rectify weird "NSKeyedArchiveRootObjectKey" top key to NSKeyedArchiveRootObjectKey = "root"
if ([archive[#"$top"] objectForKey:#"NSKeyedArchiveRootObjectKey"] != nil) {
[archive[#"$top"] setObject:archive[#"$top"][#"NSKeyedArchiveRootObjectKey"] forKey: NSKeyedArchiveRootObjectKey];
[archive[#"$top"] removeObjectForKey:#"NSKeyedArchiveRootObjectKey"];
}
// Reencode archived object
NSData *result = [NSPropertyListSerialization dataWithPropertyList:archive format:NSPropertyListBinaryFormat_v1_0 options:0 error:nil];
return result;
}
static NSMutableDictionary *getResumeDictionary(NSData *data) {
NSMutableDictionary *iresumeDictionary = nil;
if (IS_IOS10ORLATER) {
id root = nil;
id keyedUnarchiver = [[NSKeyedUnarchiver alloc] initForReadingWithData:data];
#try {
root = [keyedUnarchiver decodeTopLevelObjectForKey:#"NSKeyedArchiveRootObjectKey" error:nil];
if (root == nil) {
root = [keyedUnarchiver decodeTopLevelObjectForKey:NSKeyedArchiveRootObjectKey error:nil];
}
} #catch(NSException *exception) {
}
[keyedUnarchiver finishDecoding];
iresumeDictionary = [root mutableCopy];
}
if (iresumeDictionary == nil) {
iresumeDictionary = [NSPropertyListSerialization propertyListWithData:data options:NSPropertyListMutableContainersAndLeaves format:nil error:nil];
}
return iresumeDictionary;
}
static NSData *correctResumeData(NSData *data) {
NSString *kResumeCurrentRequest = #"NSURLSessionResumeCurrentRequest";
NSString *kResumeOriginalRequest = #"NSURLSessionResumeOriginalRequest";
if (data == nil) {
return nil;
}
NSMutableDictionary *resumeDictionary = getResumeDictionary(data);
if (resumeDictionary == nil) {
return nil;
}
resumeDictionary[kResumeCurrentRequest] = correctRequestData(resumeDictionary[kResumeCurrentRequest]);
resumeDictionary[kResumeOriginalRequest] = correctRequestData(resumeDictionary[kResumeOriginalRequest]);
NSData *result = [NSPropertyListSerialization dataWithPropertyList:resumeDictionary format:NSPropertyListXMLFormat_v1_0 options:0 error:nil];
return result;
}
#implementation NSURLSession (ResumeData)
- (NSURLSessionDownloadTask *)downloadTaskWithCorrectResumeData:(NSData *)resumeData {
NSString *kResumeCurrentRequest = #"NSURLSessionResumeCurrentRequest";
NSString *kResumeOriginalRequest = #"NSURLSessionResumeOriginalRequest";
NSData *cData = correctResumeData(resumeData);
cData = cData ? cData:resumeData;
NSURLSessionDownloadTask *task = [self downloadTaskWithResumeData:cData];
NSMutableDictionary *resumeDic = getResumeDictionary(cData);
if (resumeDic) {
if (task.originalRequest == nil) {
NSData *originalReqData = resumeDic[kResumeOriginalRequest];
NSURLRequest *originalRequest = [NSKeyedUnarchiver unarchiveObjectWithData:originalReqData ];
if (originalRequest) {
[task setValue:originalRequest forKey:#"originalRequest"];
}
}
if (task.currentRequest == nil) {
NSData *currentReqData = resumeDic[kResumeCurrentRequest];
NSURLRequest *currentRequest = [NSKeyedUnarchiver unarchiveObjectWithData:currentReqData];
if (currentRequest) {
[task setValue:currentRequest forKey:#"currentRequest"];
}
}
}
return task;
}
#end