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fixes #718 http_transact is still not right
fixes #719 calculation of buffer size is incorrect in http
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This adds a couple of new methods, and related documentation
and test cases.
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We move the HTTP definitions out of the core nng.h and into
a supplemental header. Most of this change was trivial updates
to all of the HTTP related manual pages.
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This member is the value passed in actual HTTP protocol, so it
is useful with the function nng_http_req_set_uri().
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This introduces enough of the HTTP API to support fully server
applications, including creation of websocket style protocols,
pluggable handlers, and so forth.
We have also introduced scatter/gather I/O (rudimentary) for
aios, and made other enhancements to the AIO framework. The
internals of the AIOs themselves are now fully private, and we
have eliminated the aio->a_addr member, with plans to remove the
pipe and possibly message members as well.
A few other minor issues were found and fixed as well.
The HTTP API includes request, response, and connection objects,
which can be used with both servers and clients. It also defines
the HTTP server and handler objects, which support server applications.
Support for client applications will require a client object to be
exposed, and that should be happening shortly.
None of this is "documented" yet, bug again, we will follow up shortly.
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This fixes a problem where the websocket would only send one message,
then no others, due to not clearing the "frame" busy flag on completion
of the frame transmit.
We have also added a test that tries to send 10 messages back and
forth to make sure that we catch this kind of problem in the future.
Finally we've fixed some problems that were found when testing edge
cases around the protocol, which were responsible for invalid memory
accesses.
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This is a rather large changeset -- it fundamentally adds websocket
transport, but as part of this changeset we added a generic framework
for both HTTP and websocket. We also made some supporting changes to
the core, such as changing the way timeouts work for AIOs and adding
additional state keeping for AIOs, and adding a common framework for
deferred finalization (to avoid certain kinds of circular deadlocks
during resource cleanup). We also invented a new initialization framework
so that we can avoid wiring in knowledge about them into the master
initialization framework.
The HTTP framework is not yet complete, but it is good enough for simple
static serving and building additional services on top of -- including
websocket. We expect both websocket and HTTP support to evolve
considerably, and so these are not part of the public API yet.
Property support for the websocket transport (in particular address
properties) is still missing, as is support for TLS.
The websocket transport here is a bit more robust than the original
nanomsg implementation, as it supports multiple sockets listening at
the same port sharing the same HTTP server instance, discriminating
between them based on URI (and possibly the virtual host).
Websocket is enabled by default at present, and work to conditionalize
HTTP and websocket further (to minimize bloat) is still pending.
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