The core HTTP components (HttpCore). These deal with the fundamental things required for using the HTTP protocol, such as representing a message including it's headers and optional entity, and connections over which messages are sent. In order to prepare messages before sending or after receiving, there are interceptors for requests and responses.


ConnectionReuseStrategy Interface for deciding whether a connection can be re-used for subsequent requests and should be kept alive. 
FormattedHeader An HTTP header which is already formatted. 
Header Represents an HTTP header field. 
HeaderElement One element of an HTTP header value consisting of a name / value pair and a number of optional name / value parameters. 
HeaderElementIterator A type-safe iterator for HeaderElement objects. 
HeaderIterator A type-safe iterator for Header objects. 
HttpClientConnection A client-side HTTP connection, which can be used for sending requests and receiving responses. 
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. 
HttpEntityEnclosingRequest A request with an entity. 
HttpInetConnection An HTTP connection over the Internet Protocol (IP). 
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. 
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. 
HttpResponseFactory A factory for HttpResponse objects. 
HttpResponseInterceptor HTTP protocol interceptor is a routine that implements a specific aspect of the HTTP protocol. 
HttpServerConnection A server-side HTTP connection, which can be used for receiving requests and sending responses. 
HttpStatus Constants enumerating the HTTP status codes. 
NameValuePair A name / value pair parameter used as an element of HTTP messages. 
ReasonPhraseCatalog Interface for obtaining reason phrases for HTTP status codes. 
RequestLine The Request-Line begins with a method token, followed by the Request-URI and the protocol version, and ending with CRLF. 
StatusLine The first line of a Response message is the Status-Line, consisting of the protocol version followed by a numeric status code and its associated textual phrase, with each element separated by SP characters. 
TokenIterator An iterator for String tokens. 


HttpHeaders Constants enumerating the HTTP headers. 
HttpHost Holds all of the variables needed to describe an HTTP connection to a host. 
HttpVersion Represents an HTTP version. 
ProtocolVersion Represents a protocol version. 


ConnectionClosedException Signals that the connection has been closed unexpectedly. 
HttpException Signals that an HTTP exception has occurred. 
MalformedChunkCodingException Signals a malformed chunked stream. 
MethodNotSupportedException Signals that an HTTP method is not supported. 
NoHttpResponseException Signals that the target server failed to respond with a valid HTTP response. 
ParseException Signals a parse error. 
ProtocolException Signals that an HTTP protocol violation has occurred. 
TruncatedChunkException Signals a truncated chunk in a chunked stream. 
UnsupportedHttpVersionException Signals an unsupported version of the HTTP protocol.