NSURLResponse documentation

Returns the expected content length of the receiver or -1 if there is no idea of what the content length might be.
This value is advisory, not a definitive length.

initWithURL: MIMEType: expectedContentLength: textEncodingName:

- (id) initWithURL: (NSURL*)URL MIMEType: (NSString*)MIMEType expectedContentLength: (NSInteger)length textEncodingName: (NSString*)name;

Availability: MacOS-X 10.2.0

Initialises the receiver with the URL, MIMEType, expected length and text encoding name provided.

initWithURL: statusCode: HTTPVersion: headerFields:

- (id) initWithURL: (NSURL*)URL statusCode: (NSInteger)statusCode HTTPVersion: (NSString*)HTTPVersion headerFields: (NSDictionary*)headerFields;

Availability: MacOS-X 10.7.0

Initialises the receiver with the URL, statusCode, HTTPVersion, and headerFields provided.

suggestedFilename

- (NSString*) suggestedFilename;

Availability: MacOS-X 10.2.0

Returns a suggested file name for storing the response data, with suggested names being found in the following order:

content-disposition header
last path component of URL
host name from URL
'unknown'

If possible, an extension based on the MIME type of the response is also appended.
The result should always be a valid file name.

textEncodingName

- (NSString*) textEncodingName;

Availability: MacOS-X 10.2.0

Returns the name of the character set used where response data is text

Instance Variables for NSURLResponse Class

_NSURLResponseInternal

@protected void* _NSURLResponseInternal;

Availability: MacOS-X 10.2.0

Warning the underscore at the start of the name of this instance variable indicates that, even though it is not technically private, it is intended for internal use within the package, and you should not use the variable in other code.