CRAN release 0.9.2

nanonext 0.9.2

This version contains performance enhancements which have resulted in potentially breaking changes; please review carefully and only update when ready.

New Features

• base64dec() argument 'convert' now accepts NA as an input, which unserializes back to the original object.

Updates

• The argument 'keep.raw' for all receive functions is deprecated. This is as raw vectors are no longer created as part of unserialisation or data conversion.
• Higher performance send and receive of serialized R objects.
  • For receive functions, attempting to unserialise a non-serialised message will now error with 'unknown input format' rather than fall back to a raw message vector.
• ncurl() etc. gain higher performance raw to character conversion, resulting in the following changes:
  • Attempting to convert non-text data with embedded nuls will now error instead of silently returning NULL.
  • For efficiency, when 'convert' = TRUE, a raw vector is no longer stored at $raw.
• Higher performance cryptographic hash and base64 conversion functions.
  • Attributes are now taken into account for scalar strings and raw vectors to ensure unique hashes.
• Experimental threaded function timed_signal() removed.
• Requires R >= 3.5 to ensure R serialization version 3.

CRAN release 0.9.1

nanonext 0.9.1

New Features

• Enables secure TLS transports tls+tcp:// and wss:// for scalability protocols.
  • listen() and dial() gain the argument 'tls' for supplying a TLS configuration object
  • write_cert() generates 4096 bit RSA keys and self-signed X.509 certificates for use with tls_config().
• weakref(), weakref_key() and weakref_value() implement an interface to R's weak reference system. These may be used for synchronising the lifetimes of objects with reference objects such as Sockets or Aios, or creating read-only objects accessible by the weakref value alone.
• strcat() provides a simple, fast utility to concatenate two strings.

Updates

• tls_config() now accepts a relative path if filenames are supplied for the 'client' or 'server' arguments.
• 'tlsConfig' objects no longer have a 'source' attribute.
• Fix cases where base64enc() failed for objects exceeding a certain size.
• stream() has been updated internally for additional robustness.
• Updates bundled 'libmbedtls' v3.4.0 source configuration for threading support.
• Updates bundled 'libnng' to v1.6.0 alpha (c5e9d8a) again, having resolved previous issues.

CRAN release 0.9.0

nanonext 0.9.0

The package is now compatible (again) with currently released 'libnng' versions. It will attempt to use system 'libnng' versions >= 1.5 where detected, and only compile the bundled library where necessary.

New Features

• Implements tls_config() to create re-usable TLS configurations from certificate / key files (or provided directly as text).

Updates

• 'pem' argument of ncurl(), ncurl_session() and stream() retired in favour of 'tls' which takes a TLS Configuration object created by tls_config() rather than a PEM certificate directly.
• Removes nanonext_version() in favour of the existing nng_version(), along with utils::packageVersion() if required, for greater flexibility.
• Removes ... argument for context() - retained for compatibility with the 'verify' argument, which was removed in the previous release.
• Package widens compatibility to support system 'libnng' versions >= 1.5.0.
• Bundled 'libnng' source rolled back to v1.6.0 pre-release (8e1836f) for stability.

CRAN release 0.8.3

nanonext 0.8.3

New Features

• Implements cv_signal() and timed_signal() for signalling a condition variable, the latter after a specified time (from a newly-created thread).
• Implements .context(), a performance alternative to context() that does not create the full object.
• Adds utility nanonext_version() for providing the package version, NNG and mbed TLS library versions in a single string.
• ncurl() gains a 'timeout' argument.

Updates

• Removes 'verify' argument of context() (changed to '...' for compatibility) as request() and request_signal() have been rendered safe internally for use with timeouts.
• The name of the single argument to msleep() has been changed to 'time' from 'msec'.
• Functions pipe_notify(), lock() and unlock() now error if unsuccessful rather than returning with a warning.
• For compiling bundled 'libmbedtls' and 'libnng' libraries from source, R's configured C compiler is now chosen over the system default where this is different.
• Bundled 'libnng' source updated to v1.6.0 alpha (c5e9d8a).
• Bundled 'libmbedtls' source updated to v3.4.0.

CRAN release 0.8.2

nanonext 0.8.2

New Features

• lock() and unlock() implemented to prevent further pipe connections from being established at a socket, optionally tied to the value of a condition variable.

Updates

• context() gains the argument 'verify' with a default of TRUE. This adds additional protection to notably the request() and request_signal() functions when using timeouts, as these require a connection to be present.
• Sending and hashing of language objects and symbols is now possible after fixes to serialisation.
• until() now works as intended.
• Removes recently-introduced msg_pipe() and 'weakref<-'() to maintain simplicity of user interface.
• Internal performance enhancements.

CRAN release 0.8.1

nanonext 0.8.1

New Features

• Implements synchronisation primitives from the NNG library. Condition variables allow the R execution thread to wait until it is signalled by an incoming message or pipe event.
  • adds core functions cv(), wait(), until(), cv_value(), and cv_reset().
  • adds signalling receive functions recv_aio_signal() and request_signal().
  • pipe_notify() signals up to 2 condition variables whenever pipes are added or removed at a socket.
• Adds msg_pipe() to return the pipe connection associated with a 'recvAio' message.
• Exposes the sha1() cryptographic hash and HMAC generation function from the 'Mbed TLS' library (for secure applications, use one of the SHA-2 algorithms instead).
• Utility function 'weakref<-'() exposes R_MakeWeakRef from R's C API. Useful for keeping objects alive for as long as required by a dependent object.

Updates

• ncurl_session() gains a 'timeout' argument, and returns an 'errorValue' with warning upon error.
• listen() and dial() gain the new logical argument 'error' to govern the function behaviour upon error.
• Internal performance enhancements.

CRAN release 0.8.0

nanonext 0.8.0

New Features

• Implements stat(), an interface to the NNG statistics framework. Can be used to return the number of currently connected pipes for a socket, connection attempts for a listener/dialer etc.
• Implements parse_url(), which parses a URL as per NNG. Provides a fast and standardised method for obtaining parts of a URL string.

Updates

Please review the following potentially breaking changes, and only update when ready:

• Using socket() specifying either 'dial' or 'listen', a failure to either dial or listen (due to an invalid URL for example) will now error rather than return a socket with a warning. This is safer behaviour that should make it easier to detect bugs in user code.
• opt() and 'opt<-'() have been implemented as more ergonomic options getter and setter functions to replace getopt() and setopt(). These will error if the option does not exist / input value is invalid etc.
• subscribe(), unsubscribe() and survey_time() now return the Socket or Context invisibly rather than an exit code, and will error upon invalid input etc.
• survey_time() argument name is now 'value', with a default of 1000L.
• nano Object methods $opt, $listener_opt, and $dialer_opt re-implemented to either get or set values depending on whether the 'value' parameter has been supplied.

Other changes:

• Bundled 'libnng' source updated to v1.6.0 pre-release (8e1836f).
• Supported R version amended to >= 2.12, when person() adopted the current format used for package description.
• Internal performance enhancements.

CRAN release 0.7.3

nanonext 0.7.3

New Features

• Implements ncurl_session() and transact() providing high-performance, re-usable http(s) connections.

Updates

• For dialers, the 'autostart' argument to dial(), socket() and nano() now accepts NA for starting the dialer synchronously - this is less resilient if a connection is not immediately possible, but avoids subtle errors from attempting to use the socket before an asynchronous dial has completed.
• Closing a stream now renders it inactive safely, without the need to strip all attributes on the object (as was the case previously).
• messenger() is faster to connect and exits gracefully in case of a connection error.
• Removes defunct function nano_init().
• Bundled 'libnng' source updated to v1.6.0 pre-release (539e559).
• Fixes CRAN 'additional issue' (clang-UBSAN).

CRAN release 0.7.2

nanonext 0.7.2

Updates

• For raw to character hash conversion, uses snprintf instead of sprintf for CRAN compliance.

v0.7.1

nanonext 0.7.1

New Features

• Implements getopt(), the counterpart to setopt() for retrieving the value of options on objects.

Updates

• The setopt() interface is simplified, with the type now inferred from the value supplied.
• ncurl() now returns redirect addresses as the response header 'Location'. This is so that HTTP data can also be returned at $data where this is provided.
• Eliminates CRAN 'additional issue' (clang/gcc-UBSAN).
• Internal performance optimisations.