Uses of Package
org.apache.hc.core5.http

Packages that use org.apache.hc.core5.http

Package	Description
org.apache.hc.core5.benchmark	Apache Bench (AB) clone based on HttpCore.
org.apache.hc.core5.http	Core HTTP transport component APIs.
org.apache.hc.core5.http.config	Core configuration APIs.
org.apache.hc.core5.http.impl	Default implementations of core HTTP APIs.
org.apache.hc.core5.http.impl.bootstrap	HTTP/1.1 requester and server bootstrap.
org.apache.hc.core5.http.impl.io	Default implementation of HTTP/1.1 transport based on the classic (blocking) I/O model.
org.apache.hc.core5.http.impl.nio	Default implementation of HTTP/1.1 transport based on the asynchronous (non-blocking) I/O model.
org.apache.hc.core5.http.impl.routing
org.apache.hc.core5.http.io	Core HTTP transport APIs based on the classic (blocking) I/O model.
org.apache.hc.core5.http.io.entity	HTTP message entity APIs based on the classic (blocking) I/O model.
org.apache.hc.core5.http.io.ssl
org.apache.hc.core5.http.io.support	Support classes for the classic (blocking) I/O model.
org.apache.hc.core5.http.message	Core HTTP message components, message element parser and writer APIs and their default implementations.
org.apache.hc.core5.http.nio	Core HTTP transport APIs based on the asynchronous, event driven I/O model.
org.apache.hc.core5.http.nio.entity	HTTP message entity APIs based on the asynchronous (non-blocking) I/O model.
org.apache.hc.core5.http.nio.ssl	TLS protocol support.
org.apache.hc.core5.http.nio.support	Support classes for the asynchronous I/O model.
org.apache.hc.core5.http.nio.support.classic	Support classes for the asynchronous I/O model that emulate behavior of the classic (blocking) I/O model.
org.apache.hc.core5.http.protocol	Core HTTP protocol interceptors.
org.apache.hc.core5.http.ssl
org.apache.hc.core5.http.support
org.apache.hc.core5.http2	Core HTTP/2 transport component APIs.
org.apache.hc.core5.http2.hpack	HTTP/2 HPACK APIs.
org.apache.hc.core5.http2.impl	Default implementations of core HTTP/2 APIs.
org.apache.hc.core5.http2.impl.nio	Default implementation of HTTP/2 transport based on the asynchronous (non-blocking) I/O model.
org.apache.hc.core5.http2.impl.nio.bootstrap	HTTP/2 capable requester and server bootstrap.
org.apache.hc.core5.http2.nio	HTTP/2 transport specific APIs based on the asynchronous, event driven I/O model.
org.apache.hc.core5.http2.nio.pool	HTTP/2 specific pool component APIs.
org.apache.hc.core5.http2.nio.support	Support classes for HTTP/2 asynchronous transport.
org.apache.hc.core5.http2.protocol	HTTP/2 protocol interceptors.
org.apache.hc.core5.http2.ssl	HTTP/2 specific TLS protocol support.
org.apache.hc.core5.net	Core network component APIs and utilities.
org.apache.hc.core5.pool	Client side connection pool component APIs.
org.apache.hc.core5.reactive
org.apache.hc.core5.reactor	Event driven network communication APIs and components loosely based on Doug Lea's reactor pattern.
org.apache.hc.core5.reactor.ssl	TLS/SSL support for I/O reactors.
org.apache.hc.core5.testing.classic
org.apache.hc.core5.testing.framework
org.apache.hc.core5.testing.nio
org.apache.hc.core5.testing.reactive
org.apache.hc.core5.util	Core utility classes.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.benchmark

Class and Description
ContentType Content type information consisting of a MIME type and an optional charset.
ProtocolVersion Represents a protocol version.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.http

Class and Description
ConnectionClosedException Signals that the connection has been closed unexpectedly.
ContentType Content type information consisting of a MIME type and an optional charset.
EndpointDetails HTTP connection endpoint details.
EntityDetails Details of an entity transmitted by a message.
ExceptionListener
Header Represents an HTTP header field consisting of a field name and a field value.
HttpConnection A generic HTTP connection, useful on client and server side.
HttpConnectionMetrics The point of access to the statistics of an HttpConnection.
HttpEntity An entity that can be sent or received with an HTTP message.
HttpEntityContainer Contains an HttpEntity.
HttpException Signals that an HTTP exception has occurred.
HttpHost Component that holds all details needed to describe an HTTP connection to a host.
HttpMessage HTTP messages consist of requests from client to server and responses from server to client.
HttpRequest A request message from a client to a server includes, within the first line of that message, the method to be applied to the resource, the identifier of the resource, and the protocol version in use.
HttpResponse After receiving and interpreting a request message, a server responds with an HTTP response message.
HttpVersion Represents an HTTP version.
MalformedChunkCodingException Signals a malformed chunked stream.
MessageHeaders Messages head consisting of multiple message headers.
Method Common HTTP methods defined by the HTTP specification.
MethodNotSupportedException Signals that an HTTP method is not supported.
NameValuePair A name-value pair parameter used as an element of HTTP messages.
ParseException Signals a protocol exception due to failure to parse a message element.
ProtocolException Signals that an HTTP protocol violation has occurred.
ProtocolVersion Represents a protocol version.
ProtocolVersionParser
ProtocolVersionParser.Factory
SocketModalCloseable A generic ModalCloseable backed by a network socket.
URIScheme Enumerates supported URI schemes.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.http.config

Class and Description
HttpVersion Represents an HTTP version.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.http.impl

Class and Description
ConnectionReuseStrategy Interface for deciding whether a connection can be re-used for subsequent requests and should be kept alive.
ContentLengthStrategy Represents a strategy to determine length of the enclosed content entity based on properties of the HTTP message.
ContentType Content type information consisting of a MIME type and an optional charset.
EndpointDetails HTTP connection endpoint details.
EntityDetails Details of an entity transmitted by a message.
HttpConnection A generic HTTP connection, useful on client and server side.
HttpConnectionMetrics The point of access to the statistics of an HttpConnection.
HttpException Signals that an HTTP exception has occurred.
HttpHost Component that holds all details needed to describe an HTTP connection to a host.
HttpMessage HTTP messages consist of requests from client to server and responses from server to client.
HttpRequest A request message from a client to a server includes, within the first line of that message, the method to be applied to the resource, the identifier of the resource, and the protocol version in use.
HttpResponse After receiving and interpreting a request message, a server responds with an HTTP response message.
MessageHeaders Messages head consisting of multiple message headers.
ReasonPhraseCatalog Interface for obtaining reason phrases for HTTP status codes.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.http.impl.bootstrap

Class and Description
ClassicHttpRequest 'Classic' HttpRequest message that can enclose HttpEntity.
ClassicHttpResponse 'Classic' HttpResponse message that can enclose HttpEntity.
ConnectionReuseStrategy Interface for deciding whether a connection can be re-used for subsequent requests and should be kept alive.
ExceptionListener
HttpException Signals that an HTTP exception has occurred.
HttpHost Component that holds all details needed to describe an HTTP connection to a host.
HttpRequest A request message from a client to a server includes, within the first line of that message, the method to be applied to the resource, the identifier of the resource, and the protocol version in use.
HttpRequestMapper This class can be used to resolve an object matching a particular HttpRequest.
HttpResponseFactory A factory for HttpResponse objects.
ProtocolException Signals that an HTTP protocol violation has occurred.
URIScheme Enumerates supported URI schemes.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.http.impl.io

Class and Description
ClassicHttpRequest 'Classic' HttpRequest message that can enclose HttpEntity.
ClassicHttpResponse 'Classic' HttpResponse message that can enclose HttpEntity.
ConnectionReuseStrategy Interface for deciding whether a connection can be re-used for subsequent requests and should be kept alive.
ContentLengthStrategy Represents a strategy to determine length of the enclosed content entity based on properties of the HTTP message.
Header Represents an HTTP header field consisting of a field name and a field value.
HttpConnection A generic HTTP connection, useful on client and server side.
HttpException Signals that an HTTP exception has occurred.
HttpRequestFactory A factory for HttpRequest objects.
HttpRequestMapper This class can be used to resolve an object matching a particular HttpRequest.
HttpResponseFactory A factory for HttpResponse objects.
ReasonPhraseCatalog Interface for obtaining reason phrases for HTTP status codes.
SocketModalCloseable A generic ModalCloseable backed by a network socket.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.http.impl.nio

Class and Description
ConnectionReuseStrategy Interface for deciding whether a connection can be re-used for subsequent requests and should be kept alive.
ContentLengthStrategy Represents a strategy to determine length of the enclosed content entity based on properties of the HTTP message.
Header Represents an HTTP header field consisting of a field name and a field value.
HttpConnection A generic HTTP connection, useful on client and server side.
HttpException Signals that an HTTP exception has occurred.
HttpMessage HTTP messages consist of requests from client to server and responses from server to client.
HttpRequest A request message from a client to a server includes, within the first line of that message, the method to be applied to the resource, the identifier of the resource, and the protocol version in use.
HttpRequestFactory A factory for HttpRequest objects.
HttpResponse After receiving and interpreting a request message, a server responds with an HTTP response message.
HttpResponseFactory A factory for HttpResponse objects.
HttpVersion Represents an HTTP version.
ProtocolVersion Represents a protocol version.
ReasonPhraseCatalog Interface for obtaining reason phrases for HTTP status codes.
SocketModalCloseable A generic ModalCloseable backed by a network socket.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.http.impl.routing

Class and Description
HttpException Signals that an HTTP exception has occurred.
HttpRequest A request message from a client to a server includes, within the first line of that message, the method to be applied to the resource, the identifier of the resource, and the protocol version in use.
HttpRequestMapper This class can be used to resolve an object matching a particular HttpRequest.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.http.io

Class and Description
ClassicHttpRequest 'Classic' HttpRequest message that can enclose HttpEntity.
ClassicHttpResponse 'Classic' HttpResponse message that can enclose HttpEntity.
HttpConnection A generic HTTP connection, useful on client and server side.
HttpException Signals that an HTTP exception has occurred.
HttpResponse After receiving and interpreting a request message, a server responds with an HTTP response message.
MessageHeaders Messages head consisting of multiple message headers.
SocketModalCloseable A generic ModalCloseable backed by a network socket.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.http.io.entity

Class and Description
ContentType Content type information consisting of a MIME type and an optional charset.
EntityDetails Details of an entity transmitted by a message.
Header Represents an HTTP header field consisting of a field name and a field value.
HttpEntity An entity that can be sent or received with an HTTP message.
NameValuePair A name-value pair parameter used as an element of HTTP messages.
ParseException Signals a protocol exception due to failure to parse a message element.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.http.io.ssl

Class and Description
HttpHost Component that holds all details needed to describe an HTTP connection to a host.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.http.io.support

Class and Description
ClassicHttpRequest 'Classic' HttpRequest message that can enclose HttpEntity.
ClassicHttpResponse 'Classic' HttpResponse message that can enclose HttpEntity.
ContentType Content type information consisting of a MIME type and an optional charset.
Header Represents an HTTP header field consisting of a field name and a field value.
HttpEntity An entity that can be sent or received with an HTTP message.
HttpException Signals that an HTTP exception has occurred.
HttpHost Component that holds all details needed to describe an HTTP connection to a host.
HttpRequestMapper This class can be used to resolve an object matching a particular HttpRequest.
HttpResponse After receiving and interpreting a request message, a server responds with an HTTP response message.
HttpResponseFactory A factory for HttpResponse objects.
NameValuePair A name-value pair parameter used as an element of HTTP messages.
ProtocolVersion Represents a protocol version.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.http.message

Class and Description
ClassicHttpRequest 'Classic' HttpRequest message that can enclose HttpEntity.
ClassicHttpResponse 'Classic' HttpResponse message that can enclose HttpEntity.
EntityDetails Details of an entity transmitted by a message.
FormattedHeader An HTTP header which is already formatted.
Header Represents an HTTP header field consisting of a field name and a field value.
HeaderElement Represents an element of an HTTP header value consisting of a name / value pair and a number of optional name / value parameters.
HttpEntity An entity that can be sent or received with an HTTP message.
HttpEntityContainer Contains an HttpEntity.
HttpHost Component that holds all details needed to describe an HTTP connection to a host.
HttpMessage HTTP messages consist of requests from client to server and responses from server to client.
HttpRequest A request message from a client to a server includes, within the first line of that message, the method to be applied to the resource, the identifier of the resource, and the protocol version in use.
HttpResponse After receiving and interpreting a request message, a server responds with an HTTP response message.
MessageHeaders Messages head consisting of multiple message headers.
Method Common HTTP methods defined by the HTTP specification.
NameValuePair A name-value pair parameter used as an element of HTTP messages.
ParseException Signals a protocol exception due to failure to parse a message element.
ProtocolException Signals that an HTTP protocol violation has occurred.
ProtocolVersion Represents a protocol version.
ReasonPhraseCatalog Interface for obtaining reason phrases for HTTP status codes.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.http.nio

Class and Description
EntityDetails Details of an entity transmitted by a message.
Header Represents an HTTP header field consisting of a field name and a field value.
HttpException Signals that an HTTP exception has occurred.
HttpRequest A request message from a client to a server includes, within the first line of that message, the method to be applied to the resource, the identifier of the resource, and the protocol version in use.
HttpResponse After receiving and interpreting a request message, a server responds with an HTTP response message.
MessageHeaders Messages head consisting of multiple message headers.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.http.nio.entity

Class and Description
ContentType Content type information consisting of a MIME type and an optional charset.
EntityDetails Details of an entity transmitted by a message.
Header Represents an HTTP header field consisting of a field name and a field value.
HttpException Signals that an HTTP exception has occurred.
NameValuePair A name-value pair parameter used as an element of HTTP messages.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.http.nio.ssl

Class and Description
HttpHost Component that holds all details needed to describe an HTTP connection to a host.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.http.nio.support

Class and Description
ContentType Content type information consisting of a MIME type and an optional charset.
EntityDetails Details of an entity transmitted by a message.
Header Represents an HTTP header field consisting of a field name and a field value.
HttpException Signals that an HTTP exception has occurred.
HttpHost Component that holds all details needed to describe an HTTP connection to a host.
HttpRequest A request message from a client to a server includes, within the first line of that message, the method to be applied to the resource, the identifier of the resource, and the protocol version in use.
HttpRequestMapper This class can be used to resolve an object matching a particular HttpRequest.
HttpResponse After receiving and interpreting a request message, a server responds with an HTTP response message.
Message Generic message consisting of a message head and a message body.
Method Common HTTP methods defined by the HTTP specification.
NameValuePair A name-value pair parameter used as an element of HTTP messages.
ProtocolVersion Represents a protocol version.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.http.nio.support.classic

Class and Description
ContentType Content type information consisting of a MIME type and an optional charset.
EntityDetails Details of an entity transmitted by a message.
Header Represents an HTTP header field consisting of a field name and a field value.
HttpException Signals that an HTTP exception has occurred.
HttpRequest A request message from a client to a server includes, within the first line of that message, the method to be applied to the resource, the identifier of the resource, and the protocol version in use.
HttpResponse After receiving and interpreting a request message, a server responds with an HTTP response message.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.http.protocol

Class and Description
EndpointDetails HTTP connection endpoint details.
EntityDetails Details of an entity transmitted by a message.
HttpException Signals that an HTTP exception has occurred.
HttpRequest A request message from a client to a server includes, within the first line of that message, the method to be applied to the resource, the identifier of the resource, and the protocol version in use.
HttpRequestInterceptor HTTP protocol interceptor is a routine that implements a specific aspect of the HTTP protocol.
HttpRequestMapper This class can be used to resolve an object matching a particular HttpRequest.
HttpResponse After receiving and interpreting a request message, a server responds with an HTTP response message.
HttpResponseInterceptor HTTP protocol interceptor is a routine that implements a specific aspect of the HTTP protocol.
MisdirectedRequestException Signals a misdirected request (the server is not authoritative to handle the request).
ProtocolException Signals that an HTTP protocol violation has occurred.
ProtocolVersion Represents a protocol version.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.http.ssl

Class and Description
ParseException Signals a protocol exception due to failure to parse a message element.
ProtocolVersion Represents a protocol version.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.http.support

Class and Description
EntityDetails Details of an entity transmitted by a message.
Header Represents an HTTP header field consisting of a field name and a field value.
HttpHost Component that holds all details needed to describe an HTTP connection to a host.
HttpMessage HTTP messages consist of requests from client to server and responses from server to client.
HttpRequest A request message from a client to a server includes, within the first line of that message, the method to be applied to the resource, the identifier of the resource, and the protocol version in use.
HttpResponse After receiving and interpreting a request message, a server responds with an HTTP response message.
Method Common HTTP methods defined by the HTTP specification.
NameValuePair A name-value pair parameter used as an element of HTTP messages.
ProtocolException Signals that an HTTP protocol violation has occurred.
ProtocolVersion Represents a protocol version.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.http2

Class and Description
Header Represents an HTTP header field consisting of a field name and a field value.
HttpException Signals that an HTTP exception has occurred.
HttpMessage HTTP messages consist of requests from client to server and responses from server to client.
HttpStreamResetException Signals HTTP protocol error that renders the actual HTTP data stream unreliable.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.http2.hpack

Class and Description
Header Represents an HTTP header field consisting of a field name and a field value.
HttpException Signals that an HTTP exception has occurred.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.http2.impl

Class and Description
Header Represents an HTTP header field consisting of a field name and a field value.
HttpException Signals that an HTTP exception has occurred.
HttpRequest A request message from a client to a server includes, within the first line of that message, the method to be applied to the resource, the identifier of the resource, and the protocol version in use.
HttpResponse After receiving and interpreting a request message, a server responds with an HTTP response message.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.http2.impl.nio

Class and Description
EndpointDetails HTTP connection endpoint details.
Header Represents an HTTP header field consisting of a field name and a field value.
HttpConnection A generic HTTP connection, useful on client and server side.
ProtocolVersion Represents a protocol version.
SocketModalCloseable A generic ModalCloseable backed by a network socket.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.http2.impl.nio.bootstrap

Class and Description
HttpHost Component that holds all details needed to describe an HTTP connection to a host.
HttpRequestMapper This class can be used to resolve an object matching a particular HttpRequest.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.http2.nio

Class and Description
HttpException Signals that an HTTP exception has occurred.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.http2.nio.pool

Class and Description
HttpHost Component that holds all details needed to describe an HTTP connection to a host.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.http2.nio.support

Class and Description
HttpException Signals that an HTTP exception has occurred.
HttpRequest A request message from a client to a server includes, within the first line of that message, the method to be applied to the resource, the identifier of the resource, and the protocol version in use.
HttpRequestMapper This class can be used to resolve an object matching a particular HttpRequest.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.http2.protocol

Class and Description
EntityDetails Details of an entity transmitted by a message.
HttpException Signals that an HTTP exception has occurred.
HttpRequest A request message from a client to a server includes, within the first line of that message, the method to be applied to the resource, the identifier of the resource, and the protocol version in use.
HttpRequestInterceptor HTTP protocol interceptor is a routine that implements a specific aspect of the HTTP protocol.
HttpResponse After receiving and interpreting a request message, a server responds with an HTTP response message.
HttpResponseInterceptor HTTP protocol interceptor is a routine that implements a specific aspect of the HTTP protocol.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.http2.ssl

Class and Description
HttpHost Component that holds all details needed to describe an HTTP connection to a host.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.net

Class and Description
HttpHost Component that holds all details needed to describe an HTTP connection to a host.
NameValuePair A name-value pair parameter used as an element of HTTP messages.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.pool

Class and Description
SocketModalCloseable A generic ModalCloseable backed by a network socket.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.reactive

Class and Description
ContentType Content type information consisting of a MIME type and an optional charset.
EntityDetails Details of an entity transmitted by a message.
Header Represents an HTTP header field consisting of a field name and a field value.
HttpException Signals that an HTTP exception has occurred.
HttpRequest A request message from a client to a server includes, within the first line of that message, the method to be applied to the resource, the identifier of the resource, and the protocol version in use.
HttpResponse After receiving and interpreting a request message, a server responds with an HTTP response message.
Message Generic message consisting of a message head and a message body.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.reactor

Class and Description
HttpHost Component that holds all details needed to describe an HTTP connection to a host.
SocketModalCloseable A generic ModalCloseable backed by a network socket.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.reactor.ssl

Class and Description
SocketModalCloseable A generic ModalCloseable backed by a network socket.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.testing.classic

Class and Description
ClassicHttpRequest 'Classic' HttpRequest message that can enclose HttpEntity.
ClassicHttpResponse 'Classic' HttpResponse message that can enclose HttpEntity.
ContentLengthStrategy Represents a strategy to determine length of the enclosed content entity based on properties of the HTTP message.
ExceptionListener
HttpConnection A generic HTTP connection, useful on client and server side.
HttpException Signals that an HTTP exception has occurred.
HttpHost Component that holds all details needed to describe an HTTP connection to a host.
HttpRequest A request message from a client to a server includes, within the first line of that message, the method to be applied to the resource, the identifier of the resource, and the protocol version in use.
HttpResponse After receiving and interpreting a request message, a server responds with an HTTP response message.
SocketModalCloseable A generic ModalCloseable backed by a network socket.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.testing.framework

Class and Description
ClassicHttpRequest 'Classic' HttpRequest message that can enclose HttpEntity.
ClassicHttpResponse 'Classic' HttpResponse message that can enclose HttpEntity.
HttpException Signals that an HTTP exception has occurred.
ProtocolVersion Represents a protocol version.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.testing.nio

Class and Description
Header Represents an HTTP header field consisting of a field name and a field value.
HttpConnection A generic HTTP connection, useful on client and server side.
HttpHost Component that holds all details needed to describe an HTTP connection to a host.
SocketModalCloseable A generic ModalCloseable backed by a network socket.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.testing.reactive

Class and Description
EntityDetails Details of an entity transmitted by a message.
HttpException Signals that an HTTP exception has occurred.
HttpRequest A request message from a client to a server includes, within the first line of that message, the method to be applied to the resource, the identifier of the resource, and the protocol version in use.

Classes in org.apache.hc.core5.http used by org.apache.hc.core5.util

Class and Description
EntityDetails Details of an entity transmitted by a message.