But among those Spotify music downloader, which one is the best for you? It is such a kind of tool to help all Spotify users to enjoy Spotify music anywhere and anytime. Yet, Spotify free users can't download Spotify music for offline listening. With Spotify premium plans, users can download Spotify songs for offline playback. It allows all users to enjoy Spotify music online. The factory controls the authorisation of the different requests against authoriser objects that you construct.Spotify, a popular music streaming service, has attracted lots of music addicts. Your app should ideally only create an SPTDataLoaderFactory once your user has logged in or if you require no authentication for your calls. Alternatively if you are unable to authenticate the request tell the delegate about the error. Once you have a valid token you can call the delegate (which in this case will be the factory) in order to inform it that the request has been authenticated. This interface is asynchronous to allow you to perform token refreshes while a request is in flight in order to hold it until it is ready to be authenticated. In this example we are checking if the request is for the domain which we are attempting to authenticate for, and then performing the authentication (in this case we are injecting an Auth Token into the HTTP header). In order to authenticate your requests against a backend, you are required to create an implementation of the SPTDataLoaderAuthoriser, the demo project has an example in its SPTDataLoaderAuthoriserOAuth class. If you don't need to authenticate your requests you can skip this. Defining your own SPTDataLoaderAuthoriser Note that you can provide all these as nils if you are so inclined, it may be for the best to use nils until you identify a need for these different configuration options. rvice = [SPTDataLoaderService dataLoaderServiceWithUserAgent: " rateLimiter:rateLimiter To integrate SPTDataLoader into your project using CocoaPods, add it to your Podfile: Static Libraryĭrag SPTDataLoader.xcodeproj into your App’s Xcode project and link your app with the library in the “Build Phases” section of the target. Manually Dynamic Frameworkĭrag the framework into the “Frameworks, Libraries, and Embedded Content” area in the “General” section of the target. SPTDataLoader can be installed in a variety of ways, either as a dynamic framework, a static library, or through a dependency manager such as CocoaPods or Carthage. It allows back-off retrying by using a jittered exponential backoff to prevent the thundering hordes creating a request storm after a predictable exponential period has expired. The data loader service allows rate limiting of URLs to be set explicitly or to be determined by the server using the “Retry-After” semantic. It allows for asynchronous token acquisition if the token is invalid that seamlessly integrates with the HTTP request-response pattern. The authentication in this case is abstract, allowing the creator of the SPTDataLoaderFactory to define their own semantics for token acquisition and injection. The View level, which allows automatic cancellation of requests the view has made upon deallocation.The User level, which controls the authentication of the HTTP requests.
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