Added in API level 34
Also in S Extensions 7

Summary: Nested Classes | Methods | Inherited Methods

HttpEngine

Kotlin |Java

public abstract class HttpEngine
extends Object

java.lang.Object
↳	android.net.http.HttpEngine

An engine to process UrlRequests, which uses the best HTTP stack available on the current platform. An instance of this class can be created using Builder.

Summary

Nested classes
`class`	`HttpEngine.Builder` A builder for `HttpEngine`s, which allows runtime configuration of `HttpEngine`.

Public methods
`void`	`bindToNetwork(Network network)` Binds the engine to the specified network.
`abstract URLStreamHandlerFactory`	`createUrlStreamHandlerFactory()` Creates a `URLStreamHandlerFactory` to handle HTTP and HTTPS traffic.
`static String`	`getVersionString()`
`abstract BidirectionalStream.Builder`	`newBidirectionalStreamBuilder(String url, Executor executor, BidirectionalStream.Callback callback)` Creates a builder for `BidirectionalStream` objects.
`abstract UrlRequest.Builder`	`newUrlRequestBuilder(String url, Executor executor, UrlRequest.Callback callback)` Creates a builder for `UrlRequest`.
`abstract URLConnection`	`openConnection(URL url)` Establishes a new connection to the resource specified by the `URL` `url`.
`abstract void`	`shutdown()` Shuts down the `HttpEngine` if there are no active requests, otherwise throws an exception.

Inherited methods

From class


        
          java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long timeoutMillis, int nanos)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait(long timeoutMillis)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait()` Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

Public methods

bindToNetwork

Added in API level 34
Also in S Extensions 7

public void bindToNetwork (Network network)

Binds the engine to the specified network. All requests created through this engine will use the network associated to this handle. If this network disconnects all requests will fail, the exact error will depend on the stage of request processing when the network disconnects.

Parameters
`network`	`Network`: the network to bind the engine to. Specify `null` to unbind.

createUrlStreamHandlerFactory

Added in API level 34
Also in S Extensions 7

public abstract URLStreamHandlerFactory createUrlStreamHandlerFactory ()

Creates a URLStreamHandlerFactory to handle HTTP and HTTPS traffic. An instance of this class can be installed via URL.setURLStreamHandlerFactory thus using this HttpEngine by default for all requests created via URL.openConnection.

This HttpURLConnection implementation does not implement all features offered by the API:

the HTTP cache installed via HttpResponseCache.install()
the HTTP authentication method installed via Authenticator.setDefault(Authenticator)
the HTTP cookie storage installed via CookieHandler.setDefault(CookieHandler)

While we support and encourages requests using the HTTPS protocol, we don't provide support for the HttpsURLConnection API. This lack of support also includes not using certain HTTPS features provided via HttpsURLConnection:

the HTTPS hostname verifier installed via HttpsURLConnection.setDefaultHostnameVerifier()
the HTTPS socket factory installed via HttpsURLConnection.setDefaultSSLSocketFactory()

Returns
`URLStreamHandlerFactory`	an `URLStreamHandlerFactory` instance implemented by this `HttpEngine`. This value cannot be `null`.

getVersionString

Added in API level 34
Also in S Extensions 7

public static String getVersionString ()

Returns
`String`	a human-readable version string of the engine. This value cannot be `null`.

newBidirectionalStreamBuilder

Added in API level 34
Also in S Extensions 7

public abstract BidirectionalStream.Builder newBidirectionalStreamBuilder (String url, 
                Executor executor, 
                BidirectionalStream.Callback callback)

Creates a builder for BidirectionalStream objects. All callbacks for generated BidirectionalStream objects will be invoked on executor. executor must not run tasks on the current thread, otherwise the networking operations may block and exceptions may be thrown at shutdown time.

Parameters
`url`	`String`: URL for the generated streams. This value cannot be `null`.
`executor`	`Executor`: the `Executor` on which `callback` methods will be invoked. This value cannot be `null`.
`callback`	`BidirectionalStream.Callback`: the `BidirectionalStream.Callback` object that gets invoked upon different events occurring. This value cannot be `null`.

Returns
`BidirectionalStream.Builder`	the created builder. This value cannot be `null`.

newUrlRequestBuilder

Added in API level 34
Also in S Extensions 7

public abstract UrlRequest.Builder newUrlRequestBuilder (String url, 
                Executor executor, 
                UrlRequest.Callback callback)

Creates a builder for UrlRequest. All callbacks for generated UrlRequest objects will be invoked on executor's threads. executor must not run tasks on the thread calling Executor.execute to prevent blocking networking operations and causing exceptions during shutdown.

Parameters
`url`	`String`: URL for the generated requests. This value cannot be `null`.
`executor`	`Executor`: `Executor` on which all callbacks will be invoked. This value cannot be `null`.
`callback`	`UrlRequest.Callback`: callback object that gets invoked on different events. This value cannot be `null`.

Returns
`UrlRequest.Builder`	This value cannot be `null`.

openConnection

Added in API level 34
Also in S Extensions 7

public abstract URLConnection openConnection (URL url)

Establishes a new connection to the resource specified by the URL url.

Note: This HttpURLConnection implementation is subject to certain limitations, see createUrlStreamHandlerFactory() for details.

Parameters
`url`	`URL`: URL of resource to connect to. This value cannot be `null`.

Returns
`URLConnection`	an `HttpURLConnection` instance implemented by this `HttpEngine`. This value cannot be `null`.

Throws
`IOException`	if an error occurs while opening the connection.

shutdown

Added in API level 34
Also in S Extensions 7

public abstract void shutdown ()

Shuts down the HttpEngine if there are no active requests, otherwise throws an exception. Cannot be called on network thread - the thread the HTTP stack calls into Executor on (which is different from the thread the Executor invokes callbacks on). May block until all the HttpEngine resources have been cleaned up.

HttpEngine

Summary

Nested classes

Public methods

Inherited methods

Public methods

bindToNetwork

createUrlStreamHandlerFactory

getVersionString

newBidirectionalStreamBuilder

newUrlRequestBuilder

openConnection

shutdown