Package io.netty.handler.codec.http2

Class HttpConversionUtil

java.lang.Object

io.netty.handler.codec.http2.HttpConversionUtil

public final class HttpConversionUtil
extends Object

Provides utility methods and constants for the HTTP/2 to HTTP conversion

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	HttpConversionUtil.ExtensionHeaderNames	Provides the HTTP header extensions used to carry HTTP/2 information in HTTP objects
private static final class	HttpConversionUtil.Http2ToHttpHeaderTranslator	Utility which translates HTTP/2 headers to HTTP/1 headers.

Field Summary

Fields

Modifier and Type	Field	Description
private static final AsciiString	EMPTY_REQUEST_PATH	[RFC 7540], 8.1.2.3 states the path must not be empty, and instead should be /.
private static final CharSequenceMap<AsciiString>	HTTP_TO_HTTP2_HEADER_BLACKLIST	The set of headers that should not be directly copied when converting headers from HTTP to HTTP/2.
static final HttpMethod	OUT_OF_MESSAGE_SEQUENCE_METHOD	This will be the method used for HttpRequest objects generated out of the HTTP message flow defined in [RFC 7540], Section 8.1
static final String	OUT_OF_MESSAGE_SEQUENCE_PATH	This will be the path used for HttpRequest objects generated out of the HTTP message flow defined in [RFC 7540], Section 8.1
static final HttpResponseStatus	OUT_OF_MESSAGE_SEQUENCE_RETURN_CODE	This will be the status code used for HttpResponse objects generated out of the HTTP message flow defined in [RFC 7540], Section 8.1

Constructor Summary

Constructors

Modifier	Constructor	Description
private	HttpConversionUtil()

Method Summary

Modifier and Type	Method	Description
static void	addHttp2ToHttpHeaders(int streamId, Http2Headers inputHeaders, FullHttpMessage destinationMessage, boolean addToTrailer)	Translate and add HTTP/2 headers to HTTP/1.x headers.
static void	addHttp2ToHttpHeaders(int streamId, Http2Headers inputHeaders, HttpHeaders outputHeaders, HttpVersion httpVersion, boolean isTrailer, boolean isRequest)	Translate and add HTTP/2 headers to HTTP/1.x headers.
private static String	extractPath(CharSequence method, Http2Headers headers)
static HttpResponseStatus	parseStatus(CharSequence status)	Apply HTTP/2 rules while translating status code to HttpResponseStatus
(package private) static void	setHttp2Authority(String authority, Http2Headers out)
private static void	setHttp2Scheme(HttpHeaders in, Http2Headers out)
private static void	setHttp2Scheme(HttpHeaders in, URI uri, Http2Headers out)
private static void	splitValidCookieHeader(Http2Headers out, CharSequence valueCs)
static FullHttpRequest	toFullHttpRequest(int streamId, Http2Headers http2Headers, ByteBufAllocator alloc, boolean validateHttpHeaders)	Create a new object to contain the request data
static FullHttpRequest	toFullHttpRequest(int streamId, Http2Headers http2Headers, ByteBuf content, boolean validateHttpHeaders)	Create a new object to contain the request data
static FullHttpResponse	toFullHttpResponse(int streamId, Http2Headers http2Headers, ByteBufAllocator alloc, boolean validateHttpHeaders)	Create a new object to contain the response data
static FullHttpResponse	toFullHttpResponse(int streamId, Http2Headers http2Headers, ByteBuf content, boolean validateHttpHeaders)	Create a new object to contain the response data
static Http2Headers	toHttp2Headers(HttpHeaders inHeaders, boolean validateHeaders)
static void	toHttp2Headers(HttpHeaders inHeaders, Http2Headers out)
static Http2Headers	toHttp2Headers(HttpMessage in, boolean validateHeaders)	Converts the given HTTP/1.x headers into HTTP/2 headers.
private static void	toHttp2HeadersFilterTE(Map.Entry<CharSequence,CharSequence> entry, Http2Headers out)	Filter the HttpHeaderNames.TE header according to the special rules in the HTTP/2 RFC.
private static AsciiString	toHttp2Path(URI uri)	Generate an HTTP/2 {code :path} from a URI in accordance with rfc7230, 5.3.
static HttpRequest	toHttpRequest(int streamId, Http2Headers http2Headers, boolean validateHttpHeaders)	Create a new object to contain the request data.
static HttpResponse	toHttpResponse(int streamId, Http2Headers http2Headers, boolean validateHttpHeaders)	Create a new object to contain the response data.
private static CharSequenceMap<AsciiString>	toLowercaseMap(Iterator<? extends CharSequence> valuesIter, int arraySizeHint)

Methods inherited from class java.lang.Object

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

Field Details

HTTP_TO_HTTP2_HEADER_BLACKLIST

private static final CharSequenceMap<AsciiString> HTTP_TO_HTTP2_HEADER_BLACKLIST

The set of headers that should not be directly copied when converting headers from HTTP to HTTP/2.

OUT_OF_MESSAGE_SEQUENCE_METHOD

public static final HttpMethod OUT_OF_MESSAGE_SEQUENCE_METHOD

This will be the method used for HttpRequest objects generated out of the HTTP message flow defined in [RFC 7540], Section 8.1

OUT_OF_MESSAGE_SEQUENCE_PATH

public static final String OUT_OF_MESSAGE_SEQUENCE_PATH

This will be the path used for HttpRequest objects generated out of the HTTP message flow defined in [RFC 7540], Section 8.1

See Also:

• Constant Field Values

OUT_OF_MESSAGE_SEQUENCE_RETURN_CODE

public static final HttpResponseStatus OUT_OF_MESSAGE_SEQUENCE_RETURN_CODE

This will be the status code used for HttpResponse objects generated out of the HTTP message flow defined in [RFC 7540], Section 8.1

EMPTY_REQUEST_PATH

private static final AsciiString EMPTY_REQUEST_PATH

[RFC 7540], 8.1.2.3 states the path must not be empty, and instead should be /.

Constructor Details

HttpConversionUtil

private HttpConversionUtil()

Method Details

parseStatus

public static HttpResponseStatus parseStatus(CharSequence status)
                                      throws Http2Exception

Apply HTTP/2 rules while translating status code to HttpResponseStatus

Parameters:

status - The status from an HTTP/2 frame

Returns:

The HTTP/1.x status

Throws:

Http2Exception - If there is a problem translating from HTTP/2 to HTTP/1.x

toFullHttpResponse

public static FullHttpResponse toFullHttpResponse(int streamId,
 Http2Headers http2Headers,
 ByteBufAllocator alloc,
 boolean validateHttpHeaders)
                                           throws Http2Exception

Create a new object to contain the response data

Parameters:

streamId - The stream associated with the response

http2Headers - The initial set of HTTP/2 headers to create the response with

alloc - The ByteBufAllocator to use to generate the content of the message

validateHttpHeaders -

• true to validate HTTP headers in the http-codec
• false not to validate HTTP headers in the http-codec

Returns:

A new response object which represents headers/data

Throws:

Http2Exception - see addHttp2ToHttpHeaders(int, Http2Headers, FullHttpMessage, boolean)

toFullHttpResponse

public static FullHttpResponse toFullHttpResponse(int streamId,
 Http2Headers http2Headers,
 ByteBuf content,
 boolean validateHttpHeaders)
                                           throws Http2Exception

Create a new object to contain the response data

Parameters:

streamId - The stream associated with the response

http2Headers - The initial set of HTTP/2 headers to create the response with

content - ByteBuf content to put in FullHttpResponse

validateHttpHeaders -

• true to validate HTTP headers in the http-codec
• false not to validate HTTP headers in the http-codec

Returns:

A new response object which represents headers/data

Throws:

Http2Exception - see addHttp2ToHttpHeaders(int, Http2Headers, FullHttpMessage, boolean)

toFullHttpRequest

public static FullHttpRequest toFullHttpRequest(int streamId,
 Http2Headers http2Headers,
 ByteBufAllocator alloc,
 boolean validateHttpHeaders)
                                         throws Http2Exception

Create a new object to contain the request data

Parameters:

streamId - The stream associated with the request

http2Headers - The initial set of HTTP/2 headers to create the request with

alloc - The ByteBufAllocator to use to generate the content of the message

validateHttpHeaders -

• true to validate HTTP headers in the http-codec
• false not to validate HTTP headers in the http-codec

Returns:

A new request object which represents headers/data

Throws:

Http2Exception - see addHttp2ToHttpHeaders(int, Http2Headers, FullHttpMessage, boolean)

extractPath

private static String extractPath(CharSequence method,
 Http2Headers headers)

toFullHttpRequest

public static FullHttpRequest toFullHttpRequest(int streamId,
 Http2Headers http2Headers,
 ByteBuf content,
 boolean validateHttpHeaders)
                                         throws Http2Exception

Create a new object to contain the request data

Parameters:

streamId - The stream associated with the request

http2Headers - The initial set of HTTP/2 headers to create the request with

content - ByteBuf content to put in FullHttpRequest

validateHttpHeaders -

• true to validate HTTP headers in the http-codec
• false not to validate HTTP headers in the http-codec

Returns:

A new request object which represents headers/data

Throws:

Http2Exception - see addHttp2ToHttpHeaders(int, Http2Headers, FullHttpMessage, boolean)

toHttpRequest

public static HttpRequest toHttpRequest(int streamId,
 Http2Headers http2Headers,
 boolean validateHttpHeaders)
                                 throws Http2Exception

Create a new object to contain the request data.

Parameters:

streamId - The stream associated with the request

http2Headers - The initial set of HTTP/2 headers to create the request with

validateHttpHeaders -

• true to validate HTTP headers in the http-codec
• false not to validate HTTP headers in the http-codec

Returns:

A new request object which represents headers for a chunked request

Throws:

Http2Exception - see addHttp2ToHttpHeaders(int, Http2Headers, FullHttpMessage, boolean)

toHttpResponse

public static HttpResponse toHttpResponse(int streamId,
 Http2Headers http2Headers,
 boolean validateHttpHeaders)
                                   throws Http2Exception

Create a new object to contain the response data.

Parameters:

streamId - The stream associated with the response

http2Headers - The initial set of HTTP/2 headers to create the response with

validateHttpHeaders -

• true to validate HTTP headers in the http-codec
• false not to validate HTTP headers in the http-codec

Returns:

A new response object which represents headers for a chunked response

Throws:

Http2Exception - see addHttp2ToHttpHeaders(int, Http2Headers, HttpHeaders, HttpVersion, boolean, boolean)

addHttp2ToHttpHeaders

public static void addHttp2ToHttpHeaders(int streamId,
 Http2Headers inputHeaders,
 FullHttpMessage destinationMessage,
 boolean addToTrailer)
                                  throws Http2Exception

Translate and add HTTP/2 headers to HTTP/1.x headers.

Parameters:

streamId - The stream associated with sourceHeaders.

inputHeaders - The HTTP/2 headers to convert.

destinationMessage - The object which will contain the resulting HTTP/1.x headers.

addToTrailer - true to add to trailing headers. false to add to initial headers.

Throws:

Http2Exception - If not all HTTP/2 headers can be translated to HTTP/1.x.

See Also:

• addHttp2ToHttpHeaders(int, Http2Headers, HttpHeaders, HttpVersion, boolean, boolean)

addHttp2ToHttpHeaders

public static void addHttp2ToHttpHeaders(int streamId,
 Http2Headers inputHeaders,
 HttpHeaders outputHeaders,
 HttpVersion httpVersion,
 boolean isTrailer,
 boolean isRequest)
                                  throws Http2Exception

Translate and add HTTP/2 headers to HTTP/1.x headers.

Parameters:

streamId - The stream associated with sourceHeaders.

inputHeaders - The HTTP/2 headers to convert.

outputHeaders - The object which will contain the resulting HTTP/1.x headers..

httpVersion - What HTTP/1.x version outputHeaders should be treated as when doing the conversion.

isTrailer - true if outputHeaders should be treated as trailing headers. false otherwise.

isRequest - true if the outputHeaders will be used in a request message. false for response message.

Throws:

Http2Exception - If not all HTTP/2 headers can be translated to HTTP/1.x.

toHttp2Headers

public static Http2Headers toHttp2Headers(HttpMessage in,
 boolean validateHeaders)

Converts the given HTTP/1.x headers into HTTP/2 headers. The following headers are only used if they can not be found in from the HOST header or the Request-Line as defined by rfc7230

• HttpConversionUtil.ExtensionHeaderNames.SCHEME

HttpConversionUtil.ExtensionHeaderNames.PATH is ignored and instead extracted from the Request-Line.

toHttp2Headers

public static Http2Headers toHttp2Headers(HttpHeaders inHeaders,
 boolean validateHeaders)

toLowercaseMap

private static CharSequenceMap<AsciiString> toLowercaseMap(Iterator<? extends CharSequence> valuesIter,
 int arraySizeHint)

toHttp2HeadersFilterTE

private static void toHttp2HeadersFilterTE(Map.Entry<CharSequence,CharSequence> entry,
 Http2Headers out)

Filter the HttpHeaderNames.TE header according to the special rules in the HTTP/2 RFC.

Parameters:

entry - An entry whose name is HttpHeaderNames.TE.

out - the resulting HTTP/2 headers.

toHttp2Headers

public static void toHttp2Headers(HttpHeaders inHeaders,
 Http2Headers out)

splitValidCookieHeader

private static void splitValidCookieHeader(Http2Headers out,
 CharSequence valueCs)

toHttp2Path

private static AsciiString toHttp2Path(URI uri)

Generate an HTTP/2 {code :path} from a URI in accordance with rfc7230, 5.3.

setHttp2Authority

static void setHttp2Authority(String authority,
 Http2Headers out)

setHttp2Scheme

private static void setHttp2Scheme(HttpHeaders in,
 Http2Headers out)

setHttp2Scheme

private static void setHttp2Scheme(HttpHeaders in,
 URI uri,
 Http2Headers out)