public class HttpContentCompressor extends HttpContentEncoder
HttpMessage
and an HttpContent
in gzip
or
deflate
encoding while respecting the "Accept-Encoding"
header.
If there is no matching encoding, no compression is done. For more
information on how this handler modifies the message, please refer to
HttpContentEncoder
.HttpContentEncoder.Result
ChannelHandler.Sharable, ChannelHandler.Skip
Constructor and Description |
---|
HttpContentCompressor()
Creates a new handler with the default compression level (6),
default window size (15) and default memory level (8).
|
HttpContentCompressor(int compressionLevel)
Creates a new handler with the specified compression level, default
window size (15) and default memory level (8).
|
HttpContentCompressor(int compressionLevel,
int windowBits,
int memLevel)
Creates a new handler with the specified compression level, window size,
and memory level..
|
Modifier and Type | Method and Description |
---|---|
protected HttpContentEncoder.Result |
beginEncode(HttpResponse headers,
CharSequence acceptEncoding)
Prepare to encode the HTTP message content.
|
protected ZlibWrapper |
determineWrapper(CharSequence acceptEncoding) |
acceptOutboundMessage, channelInactive, decode, encode, handlerRemoved
acceptInboundMessage, channelRead, write
bind, channelActive, channelReadComplete, channelRegistered, channelUnregistered, channelWritabilityChanged, close, connect, deregister, disconnect, exceptionCaught, flush, handlerAdded, isSharable, read, userEventTriggered
public HttpContentCompressor()
public HttpContentCompressor(int compressionLevel)
compressionLevel
- 1
yields the fastest compression and 9
yields the
best compression. 0
means no compression. The default
compression level is 6
.public HttpContentCompressor(int compressionLevel, int windowBits, int memLevel)
compressionLevel
- 1
yields the fastest compression and 9
yields the
best compression. 0
means no compression. The default
compression level is 6
.windowBits
- The base two logarithm of the size of the history buffer. The
value should be in the range 9
to 15
inclusive.
Larger values result in better compression at the expense of
memory usage. The default value is 15
.memLevel
- How much memory should be allocated for the internal compression
state. 1
uses minimum memory and 9
uses maximum
memory. Larger values result in better and faster compression
at the expense of memory usage. The default value is 8
protected HttpContentEncoder.Result beginEncode(HttpResponse headers, CharSequence acceptEncoding) throws Exception
HttpContentEncoder
beginEncode
in class HttpContentEncoder
headers
- the headersacceptEncoding
- the value of the "Accept-Encoding"
headerEmbeddedChannel
that
encodes the content into the target content encoding.
null
if acceptEncoding
is unsupported or rejected
and thus the content should be handled as-is (i.e. no encoding).Exception
protected ZlibWrapper determineWrapper(CharSequence acceptEncoding)
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