Apache HttpComponents Core

Apache HttpComponents Core doesn't cover all facets of the HTTP protocol, but only the main basics, all that's needed to support basic communications between a client and a server.

The library can be used for building both client-side and server-side HTTP services, supporting the two main I/O models:

- blocking (serial, synchronous, based on Java I/O)

- non-blocking (parallel, asynchronous, based on Java NIO)

The library tries to uphold a balance between performance and ease of use, while also remaining a self-contained component that can be added and reused in multiple applications and instances.

Apache HttpComponents Core has also spawned a similar project, Apache HttpComponents Client, an HTTP client-side agent.

What is new in this release:

• PrivateKeyStrategy does not work with NIO SSL.
• VersionInfo#getUserAgent reports incorrect Java version.
• Non-blocking connection should not trigger end-of-stream callback as long as there is still data in the session input buffer. This can cause a series of short pipelined requests to fail prematurely in case of an unexpected connection termination by the opposite endpoint.

What is new in version 4.4.2:

• PrivateKeyStrategy does not work with NIO SSL.
• VersionInfo#getUserAgent reports incorrect Java version.
• Non-blocking connection should not trigger end-of-stream callback as long as there is still data in the session input buffer. This can cause a series of short pipelined requests to fail prematurely in case of an unexpected connection termination by the opposite endpoint.

What is new in version 4.4.1:

• PrivateKeyStrategy does not work with NIO SSL.
• VersionInfo#getUserAgent reports incorrect Java version.
• Non-blocking connection should not trigger end-of-stream callback as long as there is still data in the session input buffer. This can cause a series of short pipelined requests to fail prematurely in case of an unexpected connection termination by the opposite endpoint.

What is new in version 4.4:

• Support for SSL re-negotiation with NIO.
• Out of sequence HTTP response causes NPE in HttpAsyncRequestExecutor.
• Race condition if connection request succeeds and times out at the same time.
• Fixed synchronization issue in blocking and non-blocking connection pool implementations

What is new in version 4.2.2:

• NIO length delimited content encoder incorrectly handles messages larger than 2GB.
• Fixed regression in DefaultConnectionReuseStrategy causing it to incorrectly flag connections as non-reusable after a 204, 205 or 304 response.
• Fixed regression in HttpAsyncRequestExecutor causing it to handle 204, 205 and 304 responses incorrectly by returning a message with an enclosed content body.

What is new in version 4.2.1:

• This is a patch release that fixes a number of non-critical bugs found since 4.2.

What is new in version 4.2:

• The most notable features included in this release are connection pool components for blocking and non-blocking HTTP connections and new asynchronous client and server side protocol handlers.

What is new in version 4.1.3:

• This release fixes a critical regression introduced in version 4.1.2. Under special circumstances non-blocking SSL sessions may fail to terminate correctly if the opposite end shuts down connection without sending a 'close notify' message causing an infinite loop in the I/O dispatch thread.

What is new in version 4.1.2:

• IOSession#setSocketTimeout() method does not reset the timeout count.
• Non-blocking SSL I/O session can terminate prematurely causing message body truncation when message content is chunk coded and the connection is closed on the opposite end.
• Fixed incorrect results produced by DefaultConnectionReuseStrategy when handling response messages whose content entity has been decoded or modified by a protocol interceptor.

What is new in version 4.1.1:

• This is a patch release that fixes a number of non-critical issues found since release 4.1.
• This release also marks the end of support for Java 1.3. As of release 4.2 HttpCore will require Java 1.5 for all its components.

What is new in version 4.1:

• DefaultConnectingIOReactor leaks a socket descriptor if the session request fails.
• The ChunkEncoder could request for a negative buffer limit causing an IllegalArgumentException.
• SSLIOSession#isAppInputReady() does not check the status of the session input buffer.
• EntityUtils#toString() and EntityUtils#toByteArray() to return null if HttpEntity#getContent() is null.
• Fixed incorrect handling of HTTP entities by non-blocking LengthDelimitedDecoder when the Content-Length value is larger than Integer.MAX_VALUE.

What is new in version 4.1 Beta 2:

• This is the second BETA release of HttpCore 4.1. This is mainly a bug fix release that addresses a number of non-critical bugs.