* [ANN] yahns 1.13.0 -_- sleepy app server for Ruby
@ 2016-08-05 7:44 5% Eric Wong
0 siblings, 0 replies; 3+ results
From: Eric Wong @ 2016-08-05 7:44 UTC (permalink / raw)
To: ruby-talk; +Cc: yahns-public
A Free Software, multi-threaded, non-blocking network
application server designed for low _idle_ power consumption.
It is primarily optimized for applications with occasional users
which see little or no traffic. yahns currently hosts Rack/HTTP
applications, but may eventually support other application
types. Unlike some existing servers, yahns is extremely
sensitive to fatal bugs in the applications it hosts.
* git clone git://yhbt.net/yahns
* https://yahns.yhbt.net/README
* https://yahns.yhbt.net/NEWS.atom.xml
* we only accept plain-text email yahns-public@yhbt.net
* and archive all the mail we receive: https://yhbt.net/yahns-public/
* nntp://news.public-inbox.org/inbox.comp.lang.ruby.yahns
lrg nabgure ubeevoyl-anzrq freire :>
Changes:
yahns 1.13.0 - some user-visible improvements...
And probably a billion new regressions!
yahns now allows users to skip the Rack::Head, Rack::Chunked and
Rack::ContentLength middlewares to ease migrating from/to other
real-world Rack HTTP servers. Most notably, our chunked
encoding implementation is a bit faster than Rack::Chunked by
taking advantage of the writev(2) syscall:
https://yhbt.net/yahns-public/20160803031906.14553-4-e@80x24.org/
There's also rack 2.x fixes in the test case and extras/ section
(these incompatibilities did not affect existing users unless
they use the wonky extras/ section).
There's also some graceful shutdown fixes, the process title is
now changed to display the number of live FDs.
Of course, there's the usual round of documentation improvements
which are systemd and OpenSSL setup-related this time around.
However, the majority of changes (proxy_*, wbuf_lite), affect
currently-unadvertised functionality which is subject to removal
or incompatible config changes. However, they are used to serve
our mailing list archives at:
https://yhbt.net/yahns-public/
49 changes since yahns 1.12.5:
proxy_pass: simplify writing request bodies upstream
proxy_pass: hoist out proxy_res_headers method
proxy_pass: simplify proxy_http_response
proxy_pass: split out body and trailer reading in response
proxy_pass: trim down proxy_response_finish, too
proxy_pass: split out req_res into a separate file
proxy_pass: fix resumes after complete buffering is unblocked
proxy_pass: X-Forwarded-For appends to existing list
proxy_pass: pass entire object to proxy_http_response
proxy_pass: support "proxy_buffering: false"
proxy_pass: remove unnecessary rescue
req_res: store proxy_pass object here, instead
proxy_pass: redo "proxy_buffering: false"
wbuf: remove needless "busy" parameter
Merge branch 'maint'
extras/try_gzip_static: do not show backtrace on syscall errors
wbuf: remove tmpdir parameter
wbuf_lite: fix write retries for OpenSSL sockets
test_proxy_pass_no_buffering: fix racy test
queue_*: check for closed IO objects
cleanup graceful shutdown handling
proxy_pass: more descriptive error messages
proxy_pass: fix HTTP/1.0 backends on EOF w/o buffering
wbuf_common: reset offset counter when done
extras/try_gzip_static: resolve symlinks
test_ssl: remove unnecessary priv_key DH parameter
openssl_client: wrap shutdown for graceful termination
proxy_pass: keep trailer buffer on blocked client writes
proxy_pass: avoid TOCTTOU race when unbuffering, too
proxy_pass: avoid accessing logger in env after hijacking
proxy_pass: avoid stuck responses in "proxy_buffering: false"
extras: include status messages in responses
update init and add systemd examples
test_proxy_pass_no_buffering: exclude rb/ru files, too
wbuf_lite: use StringIO instead of TmpIO
wbuf_lite: truncate StringIO when done
wbuf_lite: prevent clobbering responses
wbuf_lite: unify EOF error handling
wbuf_lite: reset sf_offset/sf_count consistently
wbuf_lite: clear @busy flag when re-arming
http_response: drop bodies for non-compliant responses
fix rack 2.x compatibility bugs
doc: add session cache usage to OpenSSL example
test: skip some buffering tests on non-default values
response: drop clients after HTTP responses of unknown length
response: reduce stack overhead for parameter passing
response: support auto-chunking for HTTP/1.1
Revert "document Rack::Chunked/ContentLength semi-requirements"
extras/exec_cgi: fix for HTTPoxy vulnerability
Please note the disclaimer:
yahns is extremely sensitive to fatal bugs in the apps it hosts. There
is no (and never will be) any built-in "watchdog"-type feature to kill
stuck processes/threads. Each yahns process may be handling thousands
of clients; unexpectedly killing the process will abort _all_ of those
connections. Lives may be lost!
yahns hackers are not responsible for your application/library bugs.
Use an application server which is tolerant of buggy applications
if you cannot be bothered to fix all your fatal bugs.
--
EW
^ permalink raw reply [relevance 5%]
* [YUCK 0/2] wbuf_lite: fix write retries for OpenSSL
@ 2016-06-06 5:14 7% Eric Wong
2016-06-06 5:14 5% ` [PATCH 1/2] wbuf: remove tmpdir parameter Eric Wong
0 siblings, 1 reply; 3+ results
From: Eric Wong @ 2016-06-06 5:14 UTC (permalink / raw)
To: yahns-public
Removing the tmpdir parameter for all Wbufs is a nice change,
but the actual bug fix is nasty and gross :< Oh well.
I suppose this increases my impetus for removing kgio from this
project entirely and improving the visibility of buffering.
And all the sendfile stuff is worthless for HTTPS users; but
it's still useful on private LANs and within VPNs (or hosting
Tor hidden services).
Eric Wong (2):
wbuf: remove tmpdir parameter
wbuf_lite: fix write retries for OpenSSL sockets
lib/yahns/http_response.rb | 4 ++--
lib/yahns/proxy_http_response.rb | 2 +-
lib/yahns/wbuf.rb | 5 ++--
lib/yahns/wbuf_lite.rb | 46 ++++++++++++++++--------------------
test/test_proxy_pass_no_buffering.rb | 7 +++++-
test/test_wbuf.rb | 9 ++++---
6 files changed, 37 insertions(+), 36 deletions(-)
^ permalink raw reply [relevance 7%]
* [PATCH 1/2] wbuf: remove tmpdir parameter
2016-06-06 5:14 7% [YUCK 0/2] wbuf_lite: fix write retries for OpenSSL Eric Wong
@ 2016-06-06 5:14 5% ` Eric Wong
0 siblings, 0 replies; 3+ results
From: Eric Wong @ 2016-06-06 5:14 UTC (permalink / raw)
To: yahns-public
We can retrieve it when we actually need to create the
temporary file. This saves an ivar slot and method dispatch
parameters.
This patch is nice, unfortunately the patch which follows is
not :P
---
lib/yahns/http_response.rb | 4 ++--
lib/yahns/proxy_http_response.rb | 2 +-
lib/yahns/wbuf.rb | 5 ++---
test/test_wbuf.rb | 9 ++++++---
4 files changed, 11 insertions(+), 9 deletions(-)
diff --git a/lib/yahns/http_response.rb b/lib/yahns/http_response.rb
index 531194f..d957df6 100644
--- a/lib/yahns/http_response.rb
+++ b/lib/yahns/http_response.rb
@@ -62,7 +62,7 @@ def response_header_blocked(header, body, alive, offset, count)
alive = Yahns::StreamFile.new(body, alive, offset, count)
body = nil
end
- wbuf = Yahns::Wbuf.new(body, alive, self.class.output_buffer_tmpdir)
+ wbuf = Yahns::Wbuf.new(body, alive)
rv = wbuf.wbuf_write(self, header)
if body && ! alive.respond_to?(:call) # skip body.each if hijacked
body.each { |chunk| rv = wbuf.wbuf_write(self, chunk) }
@@ -199,7 +199,7 @@ def http_response_write(status, headers, body)
chunk = rv # hope the skb grows when we loop into the trywrite
when :wait_writable, :wait_readable
if k.output_buffering
- wbuf = Yahns::Wbuf.new(body, alive, k.output_buffer_tmpdir)
+ wbuf = Yahns::Wbuf.new(body, alive)
rv = wbuf.wbuf_write(self, chunk)
break
else
diff --git a/lib/yahns/proxy_http_response.rb b/lib/yahns/proxy_http_response.rb
index 61f1539..8de5b4f 100644
--- a/lib/yahns/proxy_http_response.rb
+++ b/lib/yahns/proxy_http_response.rb
@@ -21,7 +21,7 @@ def proxy_unbuffer(wbuf)
def wbuf_alloc(req_res)
if req_res.proxy_pass.proxy_buffering
- Yahns::Wbuf.new(nil, req_res.alive, self.class.output_buffer_tmpdir)
+ Yahns::Wbuf.new(nil, req_res.alive)
else
Yahns::WbufLite.new(req_res)
end
diff --git a/lib/yahns/wbuf.rb b/lib/yahns/wbuf.rb
index 1010c86..583df10 100644
--- a/lib/yahns/wbuf.rb
+++ b/lib/yahns/wbuf.rb
@@ -32,9 +32,8 @@ class Yahns::Wbuf # :nodoc:
include Yahns::WbufCommon
attr_reader :busy
- def initialize(body, persist, tmpdir)
+ def initialize(body, persist)
@tmpio = nil
- @tmpdir = tmpdir
@sf_offset = @sf_count = 0
@wbuf_persist = persist # whether or not we keep the connection alive
@body = body # something we call #close on when done writing
@@ -58,7 +57,7 @@ def wbuf_write(c, buf)
@busy = rv
end until @busy
- @tmpio ||= Yahns::TmpIO.new(@tmpdir)
+ @tmpio ||= Yahns::TmpIO.new(c.class.output_buffer_tmpdir)
@sf_count += String === buf ? @tmpio.write(buf) : wbuf_writev(buf)
# we spent some time copying to the FS, try to write to
diff --git a/test/test_wbuf.rb b/test/test_wbuf.rb
index 990ad9d..1382086 100644
--- a/test/test_wbuf.rb
+++ b/test/test_wbuf.rb
@@ -9,6 +9,9 @@ class TestWbuf < Testcase
class KgioUS < UNIXSocket
include Kgio::SocketMethods
+ def self.output_buffer_tmpdir
+ Dir.tmpdir
+ end
end
def socketpair
@@ -20,7 +23,7 @@ def test_wbuf
buf = "*" * (16384 * 2)
nr = 1000
[ true, false ].each do |persist|
- wbuf = Yahns::Wbuf.new([], persist, Dir.tmpdir)
+ wbuf = Yahns::Wbuf.new([], persist)
assert_equal false, wbuf.busy
a, b = socketpair
assert_nil wbuf.wbuf_write(a, "HIHI")
@@ -71,7 +74,7 @@ def test_wbuf_blocked
break
end while true
end
- wbuf = Yahns::Wbuf.new([], true, Dir.tmpdir)
+ wbuf = Yahns::Wbuf.new([], true)
rv1 = wbuf.wbuf_write(a, buf)
rv2 = wbuf.wbuf_flush(a)
@@ -104,7 +107,7 @@ def test_wbuf_blocked
def test_wbuf_flush_close
pipe = cloexec_pipe
persist = true
- wbuf = Yahns::Wbuf.new(pipe[0], persist, Dir.tmpdir)
+ wbuf = Yahns::Wbuf.new(pipe[0], persist)
refute wbuf.respond_to?(:close) # we don't want this for HttpResponse body
sp = socketpair
rv = nil
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2016-06-06 5:14 7% [YUCK 0/2] wbuf_lite: fix write retries for OpenSSL Eric Wong
2016-06-06 5:14 5% ` [PATCH 1/2] wbuf: remove tmpdir parameter Eric Wong
2016-08-05 7:44 5% [ANN] yahns 1.13.0 -_- sleepy app server for Ruby Eric Wong
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