DeflateRequestCompressor

@available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
public struct DeflateRequestCompressor : RequestInterceptor

RequestAdapter which compresses outgoing URLRequest bodies using the deflate Content-Encoding and adds the appropriate header.

Note

Most requests to most APIs are small and so would only be slowed down by applying this adapter. Measure the size of your request bodies and the performance impact of using this adapter before use. Using this adapter with already compressed data, such as images, will, at best, have no effect. Additionally, body compression is a synchronous operation, so measuring the performance impact may be important to determine whether you want to use a dedicated requestQueue in your Session instance. Finally, not all servers support request compression, so test with all of your server configurations before deploying.

  • Type that determines the action taken when the URLRequest already has a Content-Encoding header.

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    Declaration

    Swift

    public enum DuplicateHeaderBehavior

  • Error produced when the outgoing URLRequest already has a Content-Encoding header, when the instance has been configured to produce an error.

    Declaration

    Swift

    public struct DuplicateHeaderError : Error

  • Behavior to use when the outgoing URLRequest already has a Content-Encoding header.

    Declaration

    Swift

    public let duplicateHeaderBehavior: DuplicateHeaderBehavior

  • Closure which determines whether the outgoing body data should be compressed.

    Declaration

    Swift

    public let shouldCompressBodyData: (_ bodyData: Data) -> Bool

  • Creates an instance with the provided parameters.

    Declaration

    Swift

    public init(duplicateHeaderBehavior: DuplicateHeaderBehavior = .error,
            shouldCompressBodyData: @escaping (_ bodyData: Data) -> Bool = { _ in true })

    Parameters

    duplicateHeaderBehavior

    DuplicateHeaderBehavior to use. .error by default.
    shouldCompressBodyData

    Closure which determines whether the outgoing body data should be compressed. true by default.

  • Declaration

    Swift

    public func adapt(_ urlRequest: URLRequest, for session: Session, completion: @escaping (Result<URLRequest, Error>) -> Void)