Package org.eclipse.jetty.server

Class HttpChannel

java.lang.Object
org.eclipse.jetty.server.HttpChannel
All Implemented Interfaces:
Runnable, HttpOutput.Interceptor
Direct Known Subclasses:
HttpChannelOverFCGI, HttpChannelOverHttp, HttpChannelOverHTTP2
public abstract class HttpChannel extends Object implements Runnable, HttpOutput.Interceptor
HttpChannel represents a single endpoint for HTTP semantic processing. The HttpChannel is both an HttpParser.RequestHandler, where it passively receives events from an incoming HTTP request, and a Runnable, where it actively takes control of the request/response life cycle and calls the application (perhaps suspending and resuming with multiple calls to run). The HttpChannel signals the switch from passive mode to active mode by returning true to one of the HttpParser.RequestHandler callbacks. The completion of the active phase is signalled by a call to HttpTransport.completed().

  • Field Details

  • Constructor Details

  • Method Details

    • isSendError

      public boolean isSendError()

    • formatAddrOrHost

      protected String formatAddrOrHost(String addr)
      Format the address or host returned from Request methods
      Parameters:
      addr - The address or host
      Returns:
      Default implementation returns HostPort.normalizeHost(String)

    • needContent

      public abstract boolean needContent()
      Notify the channel that content is needed. If some content is immediately available, true is returned and produceContent() has to be called and will return a non-null object. If no content is immediately available, an attempt to produce content must be made; if new content has been produced, true is returned; otherwise HttpInput.onContentProducible() is called once some content arrives and produceContent() can be called without returning null. If a failure happens, then HttpInput.onContentProducible() will be called and an error content will return the error on the next call to produceContent().
      Returns:
      true if content is immediately available.

    • produceContent

      public abstract HttpInput.Content produceContent()
      Produce a HttpInput.Content object with data currently stored within the channel. The produced content can be special (meaning calling HttpInput.Content.isSpecial() returns true) if the channel reached a special state, like EOF or an error. Once a special content has been returned, all subsequent calls to this method will always return a special content of the same kind and needContent() will always return true. The returned content is "raw", i.e.: not decoded.
      Returns:
      a HttpInput.Content object if one is immediately available without blocking, null otherwise.

    • failAllContent

      public abstract boolean failAllContent(Throwable failure)
      Fail all content that is currently stored within the channel.
      Parameters:
      failure - the failure to fail the content with.
      Returns:
      true if EOF was reached while failing all content, false otherwise.

    • failed

      public abstract boolean failed(Throwable failure)
      Fail the channel's input.
      Parameters:
      failure - the failure.
      Returns:
      true if the channel needs to be rescheduled.

    • eof

      protected abstract boolean eof()
      Mark the channel's input as EOF.
      Returns:
      true if the channel needs to be rescheduled.

    • newHttpOutput

      protected HttpOutput newHttpOutput()

    • getState

      public HttpChannelState getState()

    • addListener

      @Deprecated public boolean addListener(HttpChannel.Listener listener)
      Deprecated.
      Add a transient Listener to the HttpChannel.

      Listeners added by this method will only be notified if the HttpChannel has been constructed with an instance of HttpChannel.TransientListeners as an AbstractConnector provided listener

      Transient listeners are removed after every request cycle

      Parameters:
      listener - the listener to add
      Returns:
      true if the listener was added.

    • removeListener

      @Deprecated public boolean removeListener(HttpChannel.Listener listener)
      Deprecated.

    • getTransientListeners

      @Deprecated public List<HttpChannel.Listener> getTransientListeners()
      Deprecated.

    • getBytesWritten

      public long getBytesWritten()

    • getRequests

      public long getRequests()
      Returns:
      the number of requests handled by this connection

    • getConnector

      public Connector getConnector()

    • getHttpTransport

      public HttpTransport getHttpTransport()

    • getRequestLog

      public RequestLog getRequestLog()

    • setRequestLog

      public void setRequestLog(RequestLog requestLog)

    • addRequestLog

      public void addRequestLog(RequestLog requestLog)

    • getCommittedMetaData

      public MetaData.Response getCommittedMetaData()

    • getIdleTimeout

      public long getIdleTimeout()
      Get the idle timeout.

      This is implemented as a call to EndPoint.getIdleTimeout(), but may be overridden by channels that have timeouts different from their connections.

      Returns:
      the idle timeout (in milliseconds)

    • setIdleTimeout

      public void setIdleTimeout(long timeoutMs)
      Set the idle timeout.

      This is implemented as a call to EndPoint.setIdleTimeout(long), but may be overridden by channels that have timeouts different from their connections.

      Parameters:
      timeoutMs - the idle timeout in milliseconds

    • getByteBufferPool

      public ByteBufferPool getByteBufferPool()

    • getHttpConfiguration

      public HttpConfiguration getHttpConfiguration()

    • getServer

      public Server getServer()

    • getRequest

      public Request getRequest()

    • getResponse

      public Response getResponse()

    • getConnection

      public Connection getConnection()

    • getEndPoint

      public EndPoint getEndPoint()

    • getLocalName

      public String getLocalName()

      Return the local name of the connected channel.

      This is the host name after the connector is bound and the connection is accepted.

      Value can be overridden by HttpConfiguration.setLocalAddress(SocketAddress).

      Note: some connectors are not based on IP networking, and default behavior here will result in a null return. Use HttpConfiguration.setLocalAddress(SocketAddress) to set the value to an acceptable host name.

      Returns:
      the local name, or null

    • getLocalPort

      public int getLocalPort()

      Return the Local Port of the connected channel.

      This is the port the connector is bound to and is accepting connections on.

      Value can be overridden by HttpConfiguration.setLocalAddress(SocketAddress).

      Note: some connectors are not based on IP networking, and default behavior here will result in a value of 0 returned. Use HttpConfiguration.setLocalAddress(SocketAddress) to set the value to an acceptable port.

      Returns:
      the local port, or 0 if unspecified

    • getLocalAddress

      public InetSocketAddress getLocalAddress()

    • getRemoteAddress

      public InetSocketAddress getRemoteAddress()

    • getServerAuthority

      public HostPort getServerAuthority()
      Returns:
      return the HttpConfiguration server authority override

    • continue100

      public void continue100(int available) throws IOException
      If the associated response has the Expect header set to 100 Continue, then accessing the input stream indicates that the handler/servlet is ready for the request body and thus a 100 Continue response is sent.
      Parameters:
      available - estimate of the number of bytes that are available
      Throws:
      IOException - if the InputStream cannot be created

    • recycle

      public void recycle()

    • run

      public void run()
      Specified by:
      run in interface Runnable

    • handle

      public boolean handle()
      Returns:
      True if the channel is ready to continue handling (ie it is not suspended)

    • ensureConsumeAllOrNotPersistent

      public void ensureConsumeAllOrNotPersistent()

    • sendErrorOrAbort

      public boolean sendErrorOrAbort(String message)
      Parameters:
      message - the error message.
      Returns:
      true if we have sent an error, false if we have aborted.

    • handleException

      protected void handleException(Throwable failure)

      Sends an error 500, performing a special logic to detect whether the request is suspended, to avoid concurrent writes from the application.

      It may happen that the application suspends, and then throws an exception, while an application spawned thread writes the response content; in such case, we attempt to commit the error directly bypassing the ErrorHandler mechanisms and the response OutputStream.

      Parameters:
      failure - the Throwable that caused the problem

    • unwrap

      protected Throwable unwrap(Throwable failure, Class<?>... targets)
      Unwrap failure causes to find target class
      Parameters:
      failure - The throwable to have its causes unwrapped
      targets - Exception classes that we should not unwrap
      Returns:
      A target throwable or null

    • sendResponseAndComplete

      public void sendResponseAndComplete()

    • isExpecting100Continue

      public boolean isExpecting100Continue()

    • isExpecting102Processing

      public boolean isExpecting102Processing()

    • toString

      public String toString()
      Overrides:
      toString in class Object

    • onRequest

      public void onRequest(MetaData.Request request)

    • onContent

      public boolean onContent(HttpInput.Content content)

    • onContentComplete

      public boolean onContentComplete()

    • onTrailers

      public void onTrailers(HttpFields trailers)

    • onRequestComplete

      public boolean onRequestComplete()

    • checkAndPrepareUpgrade

      protected boolean checkAndPrepareUpgrade()

      Checks whether the processing of the request resulted in an upgrade, and if so performs upgrade preparation steps before the upgrade response is sent back to the client.

      This avoids a race where the server is unprepared if the client sends data immediately after having received the upgrade response.

      Returns:
      true if the channel is not complete and more processing is required, typically because sendError has been called.

    • onCompleted

      public void onCompleted()

    • onBadMessage

      public void onBadMessage(BadMessageException failure)

    • sendResponse

      protected boolean sendResponse(MetaData.Response response, ByteBuffer content, boolean complete, Callback callback)

    • sendResponse

      public boolean sendResponse(MetaData.Response info, ByteBuffer content, boolean complete) throws IOException
      Throws:
      IOException

    • commit

      protected void commit(MetaData.Response info)

    • isCommitted

      public boolean isCommitted()

    • isRequestCompleted

      public boolean isRequestCompleted()
      Returns:
      True if the request lifecycle is completed

    • isResponseCompleted

      public boolean isResponseCompleted()
      Returns:
      True if the response is completely written.

    • isPersistent

      public boolean isPersistent()

    • write

      public void write(ByteBuffer content, boolean complete, Callback callback)

      Non-Blocking write, committing the response if needed.

      Called as last link in HttpOutput.Filter chain
      Specified by:
      write in interface HttpOutput.Interceptor
      Parameters:
      content - the content buffer to write
      complete - whether the content is complete for the response
      callback - Callback when complete or failed

    • resetBuffer

      public void resetBuffer()
      Description copied from interface: HttpOutput.Interceptor
      Reset the buffers.

      If the Interceptor contains buffers then reset them.

      Specified by:
      resetBuffer in interface HttpOutput.Interceptor

    • getNextInterceptor

      public HttpOutput.Interceptor getNextInterceptor()
      Specified by:
      getNextInterceptor in interface HttpOutput.Interceptor
      Returns:
      The next Interceptor in the chain or null if this is the last Interceptor in the chain.

    • execute

      protected void execute(Runnable task)

    • getScheduler

      public Scheduler getScheduler()

    • isUseInputDirectByteBuffers

      public boolean isUseInputDirectByteBuffers()

    • isUseOutputDirectByteBuffers

      public boolean isUseOutputDirectByteBuffers()

    • abort

      public void abort(Throwable failure)
      If a write or similar operation to this channel fails, then this method should be called.

      The standard implementation calls HttpTransport.abort(Throwable).

      Parameters:
      failure - the failure that caused the abort.

    • isTunnellingSupported

      public boolean isTunnellingSupported()

    • getTunnellingEndPoint

      public EndPoint getTunnellingEndPoint()