com.squareup.okhttp.internal.framed

Interface FrameReader.Handler

Enclosing interface:

FrameReader

public static interface FrameReader.Handler

Method Summary

Modifier and Type	Method and Description
void	ackSettings() HTTP/2 only.
void	alternateService(int streamId, String origin, ByteString protocol, String host, int port, long maxAge) HTTP/2 only.
void	data(boolean inFinished, int streamId, BufferedSource source, int length)
void	goAway(int lastGoodStreamId, ErrorCode errorCode, ByteString debugData) The peer tells us to stop creating streams.
void	headers(boolean outFinished, boolean inFinished, int streamId, int associatedStreamId, List<Header> headerBlock, HeadersMode headersMode) Create or update incoming headers, creating the corresponding streams if necessary.
void	ping(boolean ack, int payload1, int payload2) Read a connection-level ping from the peer.
void	priority(int streamId, int streamDependency, int weight, boolean exclusive) Called when reading a headers or priority frame.
void	pushPromise(int streamId, int promisedStreamId, List<Header> requestHeaders) HTTP/2 only.
void	rstStream(int streamId, ErrorCode errorCode)
void	settings(boolean clearPrevious, Settings settings)
void	windowUpdate(int streamId, long windowSizeIncrement) Notifies that an additional windowSizeIncrement bytes can be sent on streamId, or the connection if streamId is zero.

Method Detail

data

void data(boolean inFinished,
          int streamId,
          BufferedSource source,
          int length)
   throws IOException

Throws:

IOException

headers

void headers(boolean outFinished,
             boolean inFinished,
             int streamId,
             int associatedStreamId,
             List<Header> headerBlock,
             HeadersMode headersMode)

Create or update incoming headers, creating the corresponding streams if necessary. Frames that trigger this are SPDY SYN_STREAM, HEADERS, and SYN_REPLY, and HTTP/2 HEADERS and PUSH_PROMISE.

Parameters:

outFinished - true if the receiver should not send further frames.

inFinished - true if the sender will not send further frames.

streamId - the stream owning these headers.

associatedStreamId - the stream that triggered the sender to create this stream.

rstStream

void rstStream(int streamId,
               ErrorCode errorCode)

settings

void settings(boolean clearPrevious,
              Settings settings)

ackSettings

void ackSettings()

HTTP/2 only.

ping

void ping(boolean ack,
          int payload1,
          int payload2)

Read a connection-level ping from the peer. ack indicates this is a reply. Payload parameters are different between SPDY/3 and HTTP/2.

In SPDY/3, only the first payload1 parameter is set. If the reader is a client, it is an unsigned even number. Likewise, a server will receive an odd number.

In HTTP/2, both payload1 and payload2 parameters are set. The data is opaque binary, and there are no rules on the content.

goAway

void goAway(int lastGoodStreamId,
            ErrorCode errorCode,
            ByteString debugData)

The peer tells us to stop creating streams. It is safe to replay streams with ID > lastGoodStreamId on a new connection. In- flight streams with ID <= lastGoodStreamId can only be replayed on a new connection if they are idempotent.

Parameters:

lastGoodStreamId - the last stream ID the peer processed before sending this message. If lastGoodStreamId is zero, the peer processed no frames.

errorCode - reason for closing the connection.

debugData - only valid for HTTP/2; opaque debug data to send.

windowUpdate

void windowUpdate(int streamId,
                  long windowSizeIncrement)

Notifies that an additional windowSizeIncrement bytes can be sent on streamId, or the connection if streamId is zero.

priority

void priority(int streamId,
              int streamDependency,
              int weight,
              boolean exclusive)

Called when reading a headers or priority frame. This may be used to change the stream's weight from the default (16) to a new value.

Parameters:

streamId - stream which has a priority change.

streamDependency - the stream ID this stream is dependent on.

weight - relative proportion of priority in [1..256].

exclusive - inserts this stream ID as the sole child of streamDependency.

pushPromise

void pushPromise(int streamId,
                 int promisedStreamId,
                 List<Header> requestHeaders)
          throws IOException

HTTP/2 only. Receive a push promise header block.

A push promise contains all the headers that pertain to a server-initiated request, and a promisedStreamId to which response frames will be delivered. Push promise frames are sent as a part of the response to streamId.

Parameters:

streamId - client-initiated stream ID. Must be an odd number.

promisedStreamId - server-initiated stream ID. Must be an even number.

requestHeaders - minimally includes :method, :scheme, :authority, and (@code :path}.

Throws:

IOException

alternateService

void alternateService(int streamId,
                      String origin,
                      ByteString protocol,
                      String host,
                      int port,
                      long maxAge)

HTTP/2 only. Expresses that resources for the connection or a client- initiated stream are available from a different network location or protocol configuration.

See alt-svc

Parameters:

streamId - when a client-initiated stream ID (odd number), the origin of this alternate service is the origin of the stream. When zero, the origin is specified in the origin parameter.

origin - when present, the origin is typically represented as a combination of scheme, host and port. When empty, the origin is that of the streamId.

protocol - an ALPN protocol, such as h2.

host - an IP address or hostname.

port - the IP port associated with the service.

maxAge - time in seconds that this alternative is considered fresh.