For all those who don’t want to create an AWS account to sign the web service request I would like to share my experience with Google Books Data API. It works great and doesn’t require any signatures.
In method fetchBooks: use the following URL String:
NSString *urlString = [NSString stringWithFormat:
Item nodes can be found at this XPath:
itemNodes = [[doc nodesForXPath:@"feed/entry" error:&error] retain];
For the table view you need to use the following XPaths in Interface Builder:
dc:identifier // for an Identifier like ISBN
dc:title // for a title
dc:creator // for an author
The Link to the corresponding web page can be accessed with XPath:
For me this works great. I hope it helps to prevent some headaches when going through the AWS documentation for creating the signature. I don’t understand why I need a signature and a key at all to search the public amazon catalogue.