Corrupted files downloaded from Amazon S3 using AFAmazonS3Client - objective-c

Question

I created an app that download a plist file from Amazon S3. I was using AFAmazonS3Client a client based in AFNetworking framework.
-(void) getFile:(NSString *)fileName{
self.s3Manager = [[AFAmazonS3Manager alloc] initWithAccessKeyID:#"..." secret:#"..."];
self.s3Manager.requestSerializer.region = AFAmazonS3SAEast1Region;
self.s3Manager.requestSerializer.bucket = #"verba";
NSString* documentsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
documentsPath = [documentsPath stringByAppendingPathComponent:fileName];
NSOutputStream *stream = [[NSOutputStream alloc] initToFileAtPath:documentsPath append:NO];
[self.s3Manager getObjectWithPath:#""
outputStream:stream
progress:^(NSUInteger bytesRead, long long totalBytesRead, long long totalBytesExpectedToRead) {
NSLog(#"%f%% Downloaded", (totalBytesRead / (totalBytesExpectedToRead * 1.0f) * 100));
} success:^(id responseObject) {
NSLog(#"Download Complete");
} failure:^(NSError *error) {
NSLog(#"Error: %#", error);
}];
}
Then I checked if the plist file was in document folder. And it was. So I tried to open plist file and the result was nil:
-(NSString*) loadListName:(NSString*)fileName{
NSString* documentsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString* filePath = [documentsPath stringByAppendingPathComponent:fileName];
NSDictionary *temp;
if ([[NSFileManager defaultManager] fileExistsAtPath: filePath]){
temp = [NSDictionary dictionaryWithContentsOfFile:filePath];
} else {
NSLog(#"File not found.");
}
NSString *listName = [temp objectForKey:#"name"];
return listName;
}
So I tried to add plist file manually. I downloaded and copied it to the documents folder and then dictionaryWithContentsOfFile could open the file. So I suppose that plist file was corrupted when I download the file using AFAmazonS3Client.
What I am doing wrong ?
Update 1
I realize that every single file that I downloaded from S3 are corrupted. I don't know if I handle the NSOutputStream in the right way or maybe another stuff.

Answer 1

For some reason getObjectWithPath method from AFAmazonS3Manager is not working properly.
So I rewrite my method using AFHTTPRequestOperation directly from AFNetworking
- (void)downloadFile:(NSString *)fileName block:(void (^)(NSError *error))block {
NSString *urlString = #"https://[bucket].[server area].amazonaws.com/";
urlString = [urlString stringByAppendingPathComponent:fileName];
NSURL *url = [NSURL URLWithString:urlString];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];
NSSet *set = operation.responseSerializer.acceptableContentTypes;
if ([[fileName pathExtension] isEqualToString:#"m4a"]) {
NSLog(#"%# set as audio/mp4", fileName);
operation.responseSerializer.acceptableContentTypes = [set setByAddingObject:#"audio/mp4"];
} else if ([[fileName pathExtension] isEqualToString:#"png"]) {
NSLog(#"%# set as image/png", fileName);
operation.responseSerializer.acceptableContentTypes = [set setByAddingObject:#"image/png"];
} else if ([[fileName pathExtension] isEqualToString:#"plist"]) {
NSLog(#"%# set as application/x-plist", fileName);
operation.responseSerializer.acceptableContentTypes = [set setByAddingObject:#"application/x-plist"];
}
NSString* documentsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *fullPath = [documentsPath stringByAppendingPathComponent:[url lastPathComponent]];
[operation setOutputStream:[NSOutputStream outputStreamToFileAtPath:fullPath append:NO]];
[operation setDownloadProgressBlock:^(NSUInteger bytesRead, long long totalBytesRead, long long totalBytesExpectedToRead) {
NSLog(#"bytesRead: %lu, totalBytesRead: %lld, totalBytesExpectedToRead: %lld", (unsigned long)bytesRead, totalBytesRead, totalBytesExpectedToRead);
}];
[operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
if (block) {
block(nil);
}
NSLog(#"RES: %#", [[[operation response] allHeaderFields] description]);
NSError *error;
NSDictionary *fileAttributes = [[NSFileManager defaultManager] attributesOfItemAtPath:fullPath error:&error];
if (error) {
NSLog(#"ERR: %#", [error description]);
} else {
NSNumber *fileSizeNumber = [fileAttributes objectForKey:NSFileSize];
long long fileSize = [fileSizeNumber longLongValue];
NSLog(#"%lld", fileSize);
}
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
if (block) {
block(error);
}
NSLog(#"ERR: %#", [error description]);
}];
[operation start];
}

Answer 2

Be carefull cause in last versión of Xcode, every time you restart your app in simulator, the documents folder is deleted