The old evhttp_decode_uri() function would act as tough it was doing
an (illegal, undefined) decode operation on a whole URL at once, and
treat + characters following a ? as different from + characters
preceding one. But that's not useful: If you are decoding a URI
before splitting off query parameters, you are begging to fail as soon
as somebody gives you a value with an encoded & in it.
The new evhttp_uridecode() function takes an argument that says
whether to decode + signs. Both uridecode and uriencode also now
support encoding or decoding to strings with internal 0-valued
characters.
Perviously, some characters not listed as "unreserved" by RFC 3986
(notably "!$'()*+,/:=@") were not encoded by evhttp_encode_uri. This
made trouble, especially when encoding path components (where @ and /
are bad news) and parameters (where + should get encoded so it doesn't
later decode into a space).
Spotted by Bas Verhoeven.
We already detected certain malformed queries, but we responded by
aborting the query-parsing process half-way through without telling
the user. Now, if query-parsing fails, no headers are returned, and
evhttp_parse_query returns -1.
This reverts commit fab50488fcb741884ccdfa7b83643eac3e5c9cbf.
The function was, on reflection, not important enough to break the feature
freeze, since it's trivial to build on your own.
The evhttp_parse_query API is a bit misdesigned; all the other
evkeyvalq stuff is abstract and lets you get away with having a header
stub, but evhttp_parse_query seems to require that you instantiate an
empty evkeyvalq of your own.
The interface from the user's POV is similar to the locking
implementation: either provide a structure full of function
pointers, or just call evthread_use_*_threads() and everything will
be okay.
The internal interface is meant to vaguely resemble pthread_cond_*,
which Windows people will better recognize as *ConditionVariable*.
Though the C standards allow it, it's apparently possible to get MSVC
upset by saying "struct { int field; } (declarator);" instead of
"struct {int field; } declarator;", so let's just not do that.
Bugfix for 3044492
(commit msg by nickm)
Although bufferevent operations are threadsafe, sometimes you need
to make sure that a few operations on a single bufferevent will all
be executed with nothing intervening. That's what these functions
are for.
The current template...
<HTML><HEAD><TITLE>%s</TITLE>
</HEAD><BODY>
<H1>Method Not Implemented</H1>
Invalid method in request<P>
</BODY></HTML>
is highly confusing. The given title is easily overlooked and the
hard-coded content is just plain wrong in most cases (I really read
this as "the server did not understand the requested HTTP method)
This patch changes the template to include the error reason in the
body as well as in the header, and to infer the proper reason from
the status code whenever the reason argument is NULL.
This patch also removes a redundant evhttp_add_header from
evhttp_send_error; evhttp_send_page already adds a "Connection:
close" header.
Issue 1: autoconf gets accept when a header works properly with cpp
but not with cc. This was true of the sys/sysctl.h header on
openbsd. The fix: include sys/param.h (if present) when testing for
sys/sysctl.h
Issue 2: Somehow, autoconf's macro generation code is messed up on
some versions of openbsd (including mine, and other people's too) so
that instead of SIZEOF_VOID_P, it makes SIZEOF_VOID__.
evutil/util.h now works around that.
The "current_base" symbol was never actually declared in an exported
header; it's hideously deprecated, and it was the one remaining
exported symbol (fwict) that was prefixed with neither ev nor
bufferevent nor _ev nor _bufferevent.
codesearch.google.com turns up no actual attempts to use our
current_base from outside libevent.
The EVUTIL_CLOSESOCKET() macro required you to include unistd.h in your
source for POSIX. We might as well turn it into a function: an extra
function call is going to be cheap in comparison with the system call.
We retain the EVUTIL_CLOSESOCKET() macro as an alias for the new
evutil_closesocket() function.
(commit message from email by Nick and Sebastian)
This makes evprc setup more extensible, and helps with Shuo Chen's
work on implementing Google protocol buffers rpc on top of Libevent 2
evrpc.
This patch breaks binary compatibility with previous versions of
Libevent, since it changes struct evrpc and the signature of
evrpc_register_generic(). Since all compliant code should be calling
evrpc_register_generic via EVRPC_REGISTER, it shouldn't break source
compatibility.
(Code by Shuo Chen; commit message by Nick)
The evbuffer_remove() function copies data from the front of an
evbuffer into an array of char, and removes the data from the buffer.
This function behaves the same, but does not remove the data. This
behavior can be handy for lots of protocols, where you want the
evbuffer to accumulate data until a complete record has arrived.
Lots of people have asked for a function more or less like this, and
though it isn't too hard to code one from evbuffer_peek(), it is
apparently annoying to do it in every app you write. The
evbuffer_peek() function is significantly faster, but it requires that
the user be able to handle data in separate extents.
This patch also reimplements evbufer_remove() as evbuffer_copyout()
followed by evbuffer_drain(). I am reasonably confident that this
won't be a performance hit: the memcpy() overhead should dominate the
cost of walking the list an extra time.
These structures used TAILQ for the lists of events waiting on a
single fd or signal. But order doesn't matter for these lists; only
the order of the active events lists actually matters.
Generally, LIST_ can be a little faster than TAILQ_ for most
operations. We only need to use TAILQ_ when we care about traversing
lists from tail-to-head, or we need to be able to add items to the end
of the list.
Once, for reasons that made sense at the time, we had evdns.c use its
own logging subsystem with two levels, "warn" and "debug". This leads
to problems, since setting a log handler for Libevent wouldn't actually
trap these messages, since they weren't on by default, and since some of
the warns should really be msgs.
This patch changes the default behavior of evdns.c to log to
event_(debugx,warnx,msgx) by default, and adds a new (internal-use-only)
log level of EVDNS_LOG_MSG. Programs that set a evdns logging
function will see no change. Programs that don't will now see evdns
warnings reported like other warnings.
These were introduced and deprecated in the same version (2.0.1-alpha),
presumably in two-stage process. Everybody sane should be using
evsignal_assign() and evsignal_new() instead.
The different bufferevent implementations had different behavior for
their timeouts. Some of them kept re-triggering the timeouts
indefinitely; some disabled the event immediately the first time a
timeout triggered. Some of them made the timeouts only count when
the bufferevent was actively trying to read or write; some did not.
The new behavior is modeled after old socket bufferevents, since
they were here first and their behavior is relatively sane.
Basically, each timeout disables the bufferevent's corresponding
read or write operation when it fires. Timeouts are stopped
whenever we suspend writing or reading, and reset whenever we
unsuspend writing or reading. Calling bufferevent_enable resets a
timeout, as does changing the timeout value.
