SavedRequestInputFilter (Apache Tomcat 8.5.57 API Documentation)

org.apache.coyote.http11.filters

## Class SavedRequestInputFilter

- java.lang.Object
- - org.apache.coyote.http11.filters.SavedRequestInputFilter

- All Implemented Interfaces:
    InputFilter, InputBuffer

      public class SavedRequestInputFilter
      extends Object
      implements InputFilter

  Input filter responsible for replaying the request body when restoring the saved request after FORM authentication.

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `protected ByteChunk` | `input` The original request body.

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `SavedRequestInputFilter(ByteChunk input)` Create a new SavedRequestInputFilter.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `int` | `available()` Amount of bytes still available in a buffer.
    `int` | `doRead(ApplicationBufferHandler handler)` Read from the input stream into the ByteBuffer provided by the ApplicationBufferHandler.
    `int` | `doRead(ByteChunk chunk)` Deprecated. Unused. Will be removed in Tomcat 9. Use `doRead(ApplicationBufferHandler)`
    `long` | `end()` End the current request (has no effect).
    `ByteChunk` | `getEncodingName()` Return the name of the associated encoding; here, the value is null.
    `boolean` | `isFinished()` Has the request body been read fully?
    `void` | `recycle()` Make the filter ready to process the next request.
    `void` | `setBuffer(InputBuffer buffer)` Set the next buffer in the filter pipeline (has no effect).
    `void` | `setRequest(Request request)` Set the content length on the request.

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Field Detail

    - #### input

          protected ByteChunk input

      The original request body.

  - ### Constructor Detail

    - #### SavedRequestInputFilter

          public SavedRequestInputFilter(ByteChunk input)

      Create a new SavedRequestInputFilter.
      Parameters:
        `input` - The saved request body to be replayed.

  - ### Method Detail

    - #### doRead

          @Deprecated
          public int doRead(ByteChunk chunk)
                     throws IOException

      Deprecated. Unused. Will be removed in Tomcat 9. Use `doRead(ApplicationBufferHandler)`
      Description copied from interface: `InputBuffer`
      Read from the input stream into the given buffer. IMPORTANT: the current model assumes that the protocol will 'own' the buffer and return a pointer to it in ByteChunk (i.e. the param will have chunk.getBytes()==null before call, and the result after the call).
      Specified by:
        `doRead` in interface `InputBuffer`
      Parameters:
        `chunk` - The buffer to read data into.
      Returns:
        The number of bytes that have been added to the buffer or -1 for end of stream
      Throws:
        `IOException` - If an I/O error occurs reading from the input stream

    - #### doRead

          public int doRead(ApplicationBufferHandler handler)
                     throws IOException

      Description copied from interface: `InputBuffer`
      Read from the input stream into the ByteBuffer provided by the ApplicationBufferHandler. IMPORTANT: the current model assumes that the protocol will 'own' the ByteBuffer and return a pointer to it.
      Specified by:
        `doRead` in interface `InputBuffer`
      Parameters:
        `handler` - ApplicationBufferHandler that provides the buffer to read data into.
      Returns:
        The number of bytes that have been added to the buffer or -1 for end of stream
      Throws:
        `IOException` - If an I/O error occurs reading from the input stream

    - #### setRequest

          public void setRequest(Request request)

      Set the content length on the request.
      Specified by:
        `setRequest` in interface `InputFilter`
      Parameters:
        `request` - The request to be associated with this filter

    - #### recycle

          public void recycle()

      Make the filter ready to process the next request.
      Specified by:
        `recycle` in interface `InputFilter`

    - #### getEncodingName

          public ByteChunk getEncodingName()

      Return the name of the associated encoding; here, the value is null.
      Specified by:
        `getEncodingName` in interface `InputFilter`
      Returns:
        The encoding name as a byte chunk to facilitate comparison with the value read from the HTTP headers which will also be a ByteChunk

    - #### setBuffer

          public void setBuffer(InputBuffer buffer)

      Set the next buffer in the filter pipeline (has no effect).
      Specified by:
        `setBuffer` in interface `InputFilter`
      Parameters:
        `buffer` - The next buffer

    - #### available

          public int available()

      Amount of bytes still available in a buffer.
      Specified by:
        `available` in interface `InputFilter`
      Returns:
        The number of bytes in the buffer

    - #### end

          public long end()
                   throws IOException

      End the current request (has no effect).
      Specified by:
        `end` in interface `InputFilter`
      Returns:
        0 is the expected return value. A positive value indicates that too many bytes were read. This method is allowed to use buffer.doRead to consume extra bytes. The result of this method can't be negative (if an error happens, an IOException should be thrown instead).
      Throws:
        `IOException` - If an error happens

    - #### isFinished

          public boolean isFinished()

      Description copied from interface: `InputFilter`
      Has the request body been read fully?
      Specified by:
        `isFinished` in interface `InputFilter`
      Returns:
        `true` if the request body has been fully read, otherwise `false`

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