HttpRequestDecoder Class — netty Architecture

Source Code

codec-http/src/main/java/io/netty/handler/codec/http/HttpRequestDecoder.java lines 91–398

public class HttpRequestDecoder extends HttpObjectDecoder {

    private static final AsciiString Accept = AsciiString.cached("Accept");
    private static final AsciiString Host = AsciiString.cached("Host");
    private static final AsciiString Connection = AsciiString.cached("Connection");
    private static final AsciiString ContentType = AsciiString.cached("Content-Type");
    private static final AsciiString ContentLength = AsciiString.cached("Content-Length");

    private static final int GET_AS_INT = 'G' | 'E' << 8 | 'T' << 16;
    private static final int POST_AS_INT = 'P' | 'O' << 8 | 'S' << 16 | 'T' << 24;
    private static final long HTTP_1_1_AS_LONG = 'H' | 'T' << 8 | 'T' << 16 | 'P' << 24 | (long) '/' << 32 |
            (long) '1' << 40 | (long) '.' << 48 | (long) '1' << 56;

    private static final long HTTP_1_0_AS_LONG = 'H' | 'T' << 8 | 'T' << 16 | 'P' << 24 | (long) '/' << 32 |
            (long) '1' << 40 | (long) '.' << 48 | (long) '0' << 56;

    private static final int HOST_AS_INT = 'H' | 'o' << 8 | 's' << 16 | 't' << 24;

    private static final long CONNECTION_AS_LONG_0 = 'C' | 'o' << 8 | 'n' << 16 | 'n' << 24 |
            (long) 'e' << 32 | (long) 'c' << 40 | (long) 't' << 48 | (long) 'i' << 56;

    private static final short CONNECTION_AS_SHORT_1 = 'o' | 'n' << 8;

    private static final long CONTENT_AS_LONG = 'C' | 'o' << 8 | 'n' << 16 | 't' << 24 |
            (long) 'e' << 32 | (long) 'n' << 40 | (long) 't' << 48 | (long) '-' << 56;

    private static final int TYPE_AS_INT = 'T' | 'y' << 8 | 'p' << 16 | 'e' << 24;

    private static final long LENGTH_AS_LONG = 'L' | 'e' << 8 | 'n' << 16 | 'g' << 24 |
            (long) 't' << 32 | (long) 'h' << 40;

    private static final long ACCEPT_AS_LONG = 'A' | 'c' << 8 | 'c' << 16 | 'e' << 24 |
            (long) 'p' << 32 | (long) 't' << 40;

    /**
     * Creates a new instance with the default
     * {@code maxInitialLineLength (4096)}, {@code maxHeaderSize (8192)}, and
     * {@code maxChunkSize (8192)}.
     * @see HttpDecoderConfig HttpDecoderConfig API documentation for detailed descriptions of
     * the configuration parameters.
     */
    public HttpRequestDecoder() {
    }

    /**
     * Creates a new instance with the specified parameters.
     *
     * @param maxInitialLineLength the initial size of the temporary buffer used when parsing the lines of the
     * HTTP headers.
     * @param maxHeaderSize the maximum permitted combined size of all headers in any one request.
     * @param maxChunkSize The maximum amount of data that the decoder will buffer
     * before sending chunks down the pipeline.
     * @see HttpDecoderConfig HttpDecoderConfig API documentation for detailed descriptions of
     * the configuration parameters.
     */
    public HttpRequestDecoder(
            int maxInitialLineLength, int maxHeaderSize, int maxChunkSize) {
        this(new HttpDecoderConfig()
                .setMaxInitialLineLength(maxInitialLineLength)
                .setMaxHeaderSize(maxHeaderSize)
                .setMaxChunkSize(maxChunkSize));
    }

    /**
     * @deprecated Prefer the {@link #HttpRequestDecoder(HttpDecoderConfig)} constructor,
     * to always have header validation enabled.
     * @see HttpDecoderConfig HttpDecoderConfig API documentation for detailed descriptions of
     * the configuration parameters.
     */
    @Deprecated
    public HttpRequestDecoder(
            int maxInitialLineLength, int maxHeaderSize, int maxChunkSize, boolean validateHeaders) {
        super(maxInitialLineLength, maxHeaderSize, maxChunkSize, DEFAULT_CHUNKED_SUPPORTED, validateHeaders);
    }

    /**
     * @deprecated Prefer the {@link #HttpRequestDecoder(HttpDecoderConfig)} constructor,
     * to always have header validation enabled.
     * @see HttpDecoderConfig HttpDecoderConfig API documentation for detailed descriptions of
     * the configuration parameters.
     */