DataStreamRequest

public final class DataStreamRequest : Request

Request subclass which streams HTTP response Data through a Handler closure.


                    
                    
                    Handler

Closure type handling DataStreamRequest.Stream values.

Declaration

Swift

public typealias Handler<Success, Failure> = (Stream<Success, Failure>) throws -> Void where Failure : Error

Stream
Type encapsulating an Event as it flows through the stream, as well as a CancellationToken which can be used to stop the stream at any time.
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Declaration
Swift

public struct Stream<Success, Failure> where Failure : Error
Event
Type representing an event flowing through the stream. Contains either the Result of processing streamed Data or the completion of the stream.
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Declaration
Swift

public enum Event<Success, Failure> where Failure : Error
Completion
Value containing the state of a DataStreamRequest when the stream was completed.
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Declaration
Swift

public struct Completion
CancellationToken
Type used to cancel an ongoing stream.
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Declaration
Swift

public struct CancellationToken
convertible
URLRequestConvertible value used to create URLRequests for this instance.
Declaration
Swift

public let convertible: URLRequestConvertible
automaticallyCancelOnStreamError
Whether or not the instance will be cancelled if stream parsing encounters an error.
Declaration
Swift

public let automaticallyCancelOnStreamError: Bool


                    
                    
                    validate(_:)

Validates the URLRequest and HTTPURLResponse received for the instance using the provided Validation closure.

Declaration

Swift

@discardableResult
public func validate(_ validation: @escaping Validation) -> Self

Parameters


                                validation

Validation closure used to validate the request and response.

Return Value

The DataStreamRequest.


                    
                    
                    asInputStream(bufferSize:)

Produces an InputStream that receives the Data received by the instance.

Note

The InputStream produced by this method must have open() called before being able to read Data. Additionally, this method will automatically call resume() on the instance, regardless of whether or not the creating session has startRequestsImmediately set to true.

Declaration

Swift

public func asInputStream(bufferSize: Int = 1024) -> InputStream?

Parameters


                                bufferSize

Size, in bytes, of the buffer between the OutputStream and InputStream.

Return Value

The InputStream bound to the internal OutboundStream.


                    
                    
                    onHTTPResponse(on:perform:)

Sets a closure called whenever the DataRequest produces an HTTPURLResponse and providing a completion handler to return a ResponseDisposition value.

Declaration

Swift

@discardableResult
@_disfavoredOverload
public func onHTTPResponse(
    on queue: DispatchQueue = .main,
    perform handler: @escaping (_ response: HTTPURLResponse,
                                _ completionHandler: @escaping (ResponseDisposition) -> Void) -> Void
) -> Self

Parameters

`queue`	`DispatchQueue` on which the closure will be called. `.main` by default.
`handler`	Closure called when the instance produces an `HTTPURLResponse`. The `completionHandler` provided MUST be called, otherwise the request will never complete.

Return Value

The instance.


                    
                    
                    onHTTPResponse(on:perform:)

Sets a closure called whenever the DataRequest produces an HTTPURLResponse.

Declaration

Swift

@discardableResult
public func onHTTPResponse(on queue: DispatchQueue = .main,
                           perform handler: @escaping (HTTPURLResponse) -> Void) -> Self

Parameters

`queue`	`DispatchQueue` on which the closure will be called. `.main` by default.
`handler`	Closure called when the instance produces an `HTTPURLResponse`.

Return Value

The instance.

Response Serialization


                    
                    
                    responseStream(on:stream:)

Adds a StreamHandler which performs no parsing on incoming Data.

Declaration

Swift

@discardableResult
public func responseStream(on queue: DispatchQueue = .main, stream: @escaping Handler<Data, Never>) -> Self

Parameters

`queue`	`DispatchQueue` on which to perform `StreamHandler` closure.
`stream`	`StreamHandler` closure called as `Data` is received. May be called multiple times.

Return Value

The DataStreamRequest.


                    
                    
                    responseStream(using:on:stream:)

Adds a StreamHandler which uses the provided DataStreamSerializer to process incoming Data.

Declaration

Swift

@discardableResult
public func responseStream<Serializer: DataStreamSerializer>(using serializer: Serializer,
                                                             on queue: DispatchQueue = .main,
                                                             stream: @escaping Handler<Serializer.SerializedObject, AFError>) -> Self

Parameters

`serializer`	`DataStreamSerializer` used to process incoming `Data`. Its work is done on the `serializationQueue`.
`queue`	`DispatchQueue` on which to perform `StreamHandler` closure.
`stream`	`StreamHandler` closure called as `Data` is received. May be called multiple times.

Return Value

The DataStreamRequest.


                    
                    
                    responseStreamString(on:stream:)

Adds a StreamHandler which parses incoming Data as a UTF8 String.

Declaration

Swift

@discardableResult
public func responseStreamString(on queue: DispatchQueue = .main,
                                 stream: @escaping Handler<String, Never>) -> Self

Parameters

`queue`	`DispatchQueue` on which to perform `StreamHandler` closure.
`stream`	`StreamHandler` closure called as `Data` is received. May be called multiple times.

Return Value

The DataStreamRequest.


                    
                    
                    responseStreamDecodable(of:on:using:preprocessor:stream:)

Adds a StreamHandler which parses incoming Data using the provided DataDecoder.

Declaration

Swift

@discardableResult
public func responseStreamDecodable<T: Decodable>(of type: T.Type = T.self,
                                                  on queue: DispatchQueue = .main,
                                                  using decoder: DataDecoder = JSONDecoder(),
                                                  preprocessor: DataPreprocessor = PassthroughPreprocessor(),
                                                  stream: @escaping Handler<T, AFError>) -> Self

Parameters

`type`	`Decodable` type to parse incoming `Data` into.
`queue`	`DispatchQueue` on which to perform `StreamHandler` closure.
`decoder`	`DataDecoder` used to decode the incoming `Data`.
`preprocessor`	`DataPreprocessor` used to process the incoming `Data` before it’s passed to the `decoder`.
`stream`	`StreamHandler` closure called as `Data` is received. May be called multiple times.

Return Value

The DataStreamRequest.

DataRequest / UploadRequest


                    
                    
                    publishStream(using:on:)

Creates a DataStreamPublisher for this instance using the given DataStreamSerializer and DispatchQueue.

Declaration

Swift

@available(macOS 10.15, iOS 13, watchOS 6, tvOS 13, *)
public func publishStream<Serializer: DataStreamSerializer>(using serializer: Serializer,
                                                            on queue: DispatchQueue = .main) -> DataStreamPublisher<Serializer.SerializedObject>

Parameters

`serializer`	`DataStreamSerializer` used to serialize the streamed `Data`.
`queue`	`DispatchQueue` on which the `DataRequest.Stream` values will be published. `.main` by default.

Return Value

The DataStreamPublisher.


                    
                    
                    publishData(queue:)

Creates a DataStreamPublisher for this instance which uses a PassthroughStreamSerializer to stream Data unserialized.

Declaration

Swift

@available(macOS 10.15, iOS 13, watchOS 6, tvOS 13, *)
public func publishData(queue: DispatchQueue = .main) -> DataStreamPublisher<Data>

Parameters


                                queue

DispatchQueue on which the DataRequest.Stream values will be published. .main by default.

Return Value

The DataStreamPublisher.


                    
                    
                    publishString(queue:)

Creates a DataStreamPublisher for this instance which uses a StringStreamSerializer to serialize stream Data values into String values.

Declaration

Swift

@available(macOS 10.15, iOS 13, watchOS 6, tvOS 13, *)
public func publishString(queue: DispatchQueue = .main) -> DataStreamPublisher<String>

Parameters


                                queue

DispatchQueue on which the DataRequest.Stream values will be published. .main by default.

Return Value

The DataStreamPublisher.


                    
                    
                    publishDecodable(type:queue:decoder:preprocessor:)

Creates a DataStreamPublisher for this instance which uses a DecodableStreamSerializer with the provided parameters to serialize stream Data values into the provided type.

Declaration

Swift

@available(macOS 10.15, iOS 13, watchOS 6, tvOS 13, *)
public func publishDecodable<T: Decodable>(type: T.Type = T.self,
                                           queue: DispatchQueue = .main,
                                           decoder: DataDecoder = JSONDecoder(),
                                           preprocessor: DataPreprocessor = PassthroughPreprocessor()) -> DataStreamPublisher<T>

Parameters

`type`	`Decodable` type to which to decode stream `Data`. Inferred from the context by default.
`queue`	`DispatchQueue` on which the `DataRequest.Stream` values will be published. `.main` by default.
`decoder`	`DataDecoder` instance used to decode stream `Data`. `JSONDecoder()` by default.
`preprocessor`	`DataPreprocessor` which filters incoming stream `Data` before serialization. `PassthroughPreprocessor()` by default.

Return Value

The DataStreamPublisher.

DataStreamTask


                    
                    
                    httpResponses(bufferingPolicy:)

Creates a StreamOf<HTTPURLResponse> for the instance’s responses.

Declaration

Swift

public func httpResponses(bufferingPolicy: StreamOf<HTTPURLResponse>.BufferingPolicy = .unbounded) -> StreamOf<HTTPURLResponse>

Parameters


                                bufferingPolicy

BufferingPolicy that determines the stream’s buffering behavior..unbounded by default.

Return Value

The StreamOf<HTTPURLResponse>.


                    
                    
                    onHTTPResponse(perform:)

Sets an async closure returning a Request.ResponseDisposition, called whenever the DataStreamRequest produces an HTTPURLResponse.

Note

Most requests will only produce a single response for each outgoing attempt (initial + retries). However, some types of response may trigger multiple HTTPURLResponses, such as multipart streams, where responses after the first will contain the part headers.

Declaration

Swift

@discardableResult
@_disfavoredOverload
public func onHTTPResponse(perform handler: @escaping @Sendable (HTTPURLResponse) async -> ResponseDisposition) -> Self

Parameters


                                handler

Async closure executed when a new HTTPURLResponse is received and returning a ResponseDisposition value. This value determines whether to continue the request or cancel it as if cancel() had been called on the instance. Note, this closure is called on an arbitrary thread, so any synchronous calls in it will execute in that context.

Return Value

The instance.


                    
                    
                    onHTTPResponse(perform:)

Sets an async closure called whenever the DataStreamRequest produces an HTTPURLResponse.

Note

Declaration

Swift

@discardableResult
public func onHTTPResponse(perform handler: @escaping @Sendable (HTTPURLResponse) async -> Void) -> Self

Parameters


                                handler

Async closure executed when a new HTTPURLResponse is received. Note, this closure is called on an arbitrary thread, so any synchronous calls in it will execute in that context.

Return Value

The instance.

streamTask()
Creates a DataStreamTask used to await streams of serialized values.
Declaration
Swift

public func streamTask() -> DataStreamTask
Return Value

The DataStreamTask.

Validation
A closure used to validate a request that takes a URLRequest and HTTPURLResponse and returns whether the request was valid.
Declaration
Swift

public typealias Validation = (_ request: URLRequest?, _ response: HTTPURLResponse) -> ValidationResult


                    
                    
                    validate(statusCode:)

Validates that the response has a status code in the specified sequence.

If validation fails, subsequent calls to response handlers will have an associated error.

Declaration

Swift

@discardableResult
public func validate<S>(statusCode acceptableStatusCodes: S) -> Self where S : Sequence, S.Element == Int

Parameters


                                acceptableStatusCodes

Sequence of acceptable response status codes.

Return Value

The instance.


                    
                    
                    validate(contentType:)

Validates that the response has a content type in the specified sequence.

If validation fails, subsequent calls to response handlers will have an associated error.

Declaration

Swift

@discardableResult
public func validate<S>(contentType acceptableContentTypes: @autoclosure @escaping () -> S) -> Self where S : Sequence, S.Element == String

Parameters


                                contentType

The acceptable content types, which may specify wildcard types and/or subtypes.

Return Value

The request.

validate()
Validates that the response has a status code in the default acceptable range of 200…299, and that the content type matches any specified in the Accept HTTP header field.

If validation fails, subsequent calls to response handlers will have an associated error.
Declaration
Swift

@discardableResult public func validate() -> Self
Return Value

The instance.