Almost ready for distribution...

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Diego Nehab 2004-06-17 21:46:22 +00:00
parent eac26d2c8d
commit 597a062b1b
14 changed files with 323 additions and 161 deletions

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Major C code rewrite. Code is modular and extensible. Hopefully, next
versions will include code for local domain sockets, file descriptors,
pipes (on unix) and named pipes (on windows) as a bonus.
What's New
All functions provided by the library are in the namespace "socket".
Functions such as send/receive/timeout/close etc do not exist anymore as
stand alone functions. They are now only available as methods of the
appropriate objects.
Everything is new! Many changes for 2.0 happened in the C layer,
which has been almost completely rewritten. The code has been ported to
Lua 5.0 and greatly improved. There have also been some API changes
that made the interface simpler and more consistent. Here are some of
the changes that made it into version 2.0:
TCP has been changed to become more uniform. First create an object, then
connect or bind if needed. Then use IO functions. The "socket.connect" and
"socket.bind" functions are provided for simplicity, but they just call
"socket.tcp" followed by the ":connect" or ":bind" methods.
<> Major C code rewrite. Code is modular and extensible. Hopefully, other
developers will be motivated to provide code for SSL, local domain
sockets, file descriptors, pipes (on Unix) and named pipes etc;
All functions return a non-nil value as first return value if successful.
All functions return whatever could be retrieved followed by error message
in case of error. The best way to check for errors is to check for the
presence of an error message. WARNING: The send function was affected.
<> Everything that is exported by the library is exported inside
namespaces. These should be obtained with calls to the
'require' function;
Better error messages and parameter checking.
<> Functions such as
send/receive/timeout/close etc do not exist anymore as stand-alone
functions. They are now only available as methods of the appropriate
objects;
UDP connected udp sockets can break association with peer by calling
setpeername with address "*".
<> All functions return a non-nil value as first return value if successful.
All functions return 'nil' followed by error message
in case of error. This made the library much easier to use;
socket.sleep and socket.time are now part of the library and are
supported.
<> Greatly reduced the number of times the C select is called
during data transfers, by calling only on failure. This might
improve a lot the maximum throughput;
<> TCP has been changed to become more uniform. It's possible to first
create a TCP object,
then connect or bind if needed, and finally use I/O functions.
'socket.connect' and 'socket.bind' functions are still
provided for simplicity;
<> This allows for setting a timeout value before connecting;
<> And also allows binding to a local address before connecting;
<> New 'socket.dns.gethostname' function and 'shutdown'
method;
<> Better error messages and parameter checking;
<> Should be interrupt safe;
<> UDP connected sockets can break association with peer by calling
'setpeername' with address ''*'';
<> Sets returned by 'socket.select' are associative;
<> Select checks if sockets have buffered data and returns immediately;
<> 'socket.sleep' and 'socket.time' are now part of the
library and are supported. They used to be available only when
LUASOCKET_DEBUG was defined, but it turns out they might be useful for
applications;
<> 'socket.try' and 'socket.protect' provide a simple
interface to exceptions that proved very in the implementation of
high-level modules;
<> Socket options interface has been improved. TCP objects also
support socket options and many new options were added.
Lots of changes in the Lua modules, too!
<> Every module loads only the modules that it needs. There is no waste
of memory. LuaSocket core takes only 20k of memory;
<> New MIME and LTN12 modules make all other modules much more powerful;
<> Support for multipart messages in the SMTP module;
<> The old callback mechanism of FTP and HTTP has been replaced with LTN12
sources and sinks, with advantage;
<> Common implementation for low-level FTP and SMTP;
<> FTP, HTTP, and SMTP are implemented in multiple levels in such a way
that users will have no problems extending the functionality to satisfy
personal needs;
<> SMTP knows how to perform LOGIN and PLAIN authentication.
Socket options interface has been improved and TCP now also supports socket
options.