AFNetworking 2.2.1 loading an image from Amazon S3 server - ios

Question

I'm running into a problem trying to download an image on an Amazon S3 server.
I get the following error:
Error Domain=AFNetworkingErrorDomain Code=-1016 "Request failed: unacceptable content-type: binary/octet-stream"
Anyone has an idea?

Answer 1

This error is generated by
- (BOOL)validateResponse:(NSHTTPURLResponse *)response
data:(NSData *)data
error:(NSError * __autoreleasing *)error
method of AFHTTPResponseSerializer in case of unexpectable MIME type of response.
You can fix it by adding required MIME type to response serializer
// In this sample self is inherited from AFHTTPSessionManager
self.responseSerializer = [AFImageResponseSerializer serializer];
NSSet *set = self.responseSerializer.acceptableContentTypes;
self.responseSerializer.acceptableContentTypes = [set setByAddingObject:#"binary/octet-stream"];
Or you can modify AFImageResponseSerializer :
- (instancetype)init {
self = [super init];
if (!self) {
return nil;
}
self.acceptableContentTypes = [[NSSet alloc] initWithObjects:#"image/tiff", #"image/jpeg", #"image/gif", #"image/png", #"image/ico", #"image/x-icon", #"image/bmp", #"image/x-bmp", #"image/x-xbitmap", #"image/x-win-bitmap", #"binary/octet-stream", nil];
#if defined(__IPHONE_OS_VERSION_MIN_REQUIRED)
self.imageScale = [[UIScreen mainScreen] scale];
self.automaticallyInflatesResponseImage = YES;
#endif
return self;
}
But root of the problem is probably that you save your images to Amazon with wrong MIME type or without type at all. In my code I save images to Amazon with following code
S3PutObjectRequest *putObjectRequest = [ [ S3PutObjectRequest alloc ] initWithKey:keyImage inBucket:self.s3BucketName ];
putObjectRequest.contentType = #"image/jpeg";
putObjectRequest.data = UIImageJPEGRepresentation( [ image fixOrientation ], 0.5f );
putObjectRequest.cannedACL = [ S3CannedACL publicRead ];

Answer 2

Updated for Boto 3
You can check what MIME type it is through your S3 web interface. First select the file you are having problems with, then select the Properties view. In this view open the Metadata section.
If your Content-Type is binary/octet-stream it is unset. Setting it in Boto 3, is different than the above answer for Boto 2. Here is how I do it:
filename = "/home/me/image42.jpeg" #the file I want to upload
bucketname = "myNewBucket" #name of my S3 bucket
key = "myImages/image42.jpeg" #desired name in S3 bucket
s3.Object(bucketname, key).put(Body=open(filename, 'rb'), ACL='public-read',ContentType='image/jpeg')

Answer 3

AFNetworking 3.1.0
You should just modify the acceptableContentTypes property on an existing image response serializer. You can use AFHTTPSessionManager do it.
NSURL *url = [NSURL URLWithString:#"http://..."];
AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
AFHTTPResponseSerializer *serializer = [AFHTTPResponseSerializer serializer];
serializer.acceptableContentTypes = [NSSet setWithObject:#"binary/octet-stream"];
manager.responseSerializer = serializer;
Then you can use manager to get the content of URL:
[manager GET:[url absoluteString] parameters:nil progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id _Nullable responseObject) {
// ...
} failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
// ...
}];
or use setImageWithURLRequest:placeholderImage:success:^failure:^ for get image:
UIImageView *imageView = [UIImageView new];
[[UIImageView sharedImageDownloader] setSessionManager:manager];
NSURLRequest *urlRequest = [[NSURLRequest alloc] initWithURL:[NSURL URLWithString:#"http://..."]];
[imageView setImageWithURLRequest:urlRequest placeholderImage:[UIImage new] success:^(NSURLRequest * _Nonnull request, NSHTTPURLResponse * _Nullable response, UIImage * _Nonnull image) {
// but image can be NSData instead of UIImage
} failure:^(NSURLRequest * _Nonnull request, NSHTTPURLResponse * _Nullable response, NSError * _Nonnull error) {
// ...
}];
But the response can be NSData instead of UIImage.
I hope that it helps you.