* [ANN] yahns 1.16.0 -_- sleepy app server for Ruby
@ 2018-08-06 1:32 4% Eric Wong
0 siblings, 0 replies; 2+ results
From: Eric Wong @ 2018-08-06 1:32 UTC (permalink / raw)
To: ruby-talk, 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 https://yhbt.net/yahns.git
* https://yhbt.net/yahns/README
* https://yhbt.net/yahns/NEWS.atom.xml (supported by most "RSS" readers)
* 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 1.16.0
This release fixes warnings for users combining Rack::Deflater
with HTTPS support:
https://yhbt.net/yahns-public/20180714005630.11812-1-e@80x24.org/
yahns-rackup(1) users may not specify "-O listen=inherit"
when spawning from systemd. The "listen" directive may
be omitted entirely from the yahns-config(5) files.
A few other cleanups and nothing interesting, otherwise.
20 yawn-worthy changes since v1.15.0 (2017-03-23):
config: more descriptive variable name
proxy_pass: comment explaining what rack.hijack calls
USR2 upgrades may use Process.spawn for vfork
avoid Thread#[] and Thread#[]= across threads
gemspec: declare Ruby 2.0+ dependency, here
test_bin: SO_KEEPALIVE value only needs to be true
rackup_handler: remove unnecessary branch
test_bin: use RbConfig.ruby for non-standard names
allow omitting specifying socket name when inheriting listen socket
server: fix incomplete comment about SSLContext#setup
test_rack_env: additional test for Rack environment
test: allow setting TAIL env to watch error logs
fix some unused variables
tests: thread-safety fixes
test/server_helper: describe reason for termination
test/test_ssl: set SSLContext#security_level=0
doc: https:// URLs instead of git://
http_client: clear backtrace on "wrong version number" in OpenSSL
openssl_client: do not attempt writes after SystemCallError
use IO#pread if available in Ruby 2.5
*ZZZZZZ*
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.
^ permalink raw reply [relevance 4%]
* [PATCH] use IO#pread if available in Ruby 2.5
@ 2018-07-16 11:46 7% Eric Wong
0 siblings, 0 replies; 2+ results
From: Eric Wong @ 2018-07-16 11:46 UTC (permalink / raw)
To: yahns-public
In the future, this will allow sharing open files across
different clients when serving static files. For now, it
saves us one syscall.
---
lib/yahns/http_client.rb | 19 +++++++++++++++----
lib/yahns/openssl_client.rb | 5 +----
2 files changed, 16 insertions(+), 8 deletions(-)
diff --git a/lib/yahns/http_client.rb b/lib/yahns/http_client.rb
index fd97624..d55a0db 100644
--- a/lib/yahns/http_client.rb
+++ b/lib/yahns/http_client.rb
@@ -322,12 +322,23 @@ def app_hijacked?(env, res)
true
end
- def trysendio(io, offset, count)
- return 0 if count == 0
+ def do_pread(io, count, offset)
count = 0x4000 if count > 0x4000
buf = Thread.current[:yahns_sfbuf] ||= ''.dup
- io.pos = offset
- str = io.read(count, buf) or return # nil for EOF
+ if io.respond_to?(:pread)
+ io.pread(count, offset, buf)
+ else
+ io.pos = offset
+ io.read(count, buf)
+ end
+ rescue EOFError
+ warn "BUG: do_pread overreach:\n #{caller.join("\n ")}\n"
+ nil
+ end
+
+ def trysendio(io, offset, count)
+ return 0 if count == 0
+ str = do_pread(io, count, offset) or return # nil for EOF
n = 0
case rv = kgio_trywrite(str)
when String # partial write, keep trying
diff --git a/lib/yahns/openssl_client.rb b/lib/yahns/openssl_client.rb
index c090083..d3caacb 100644
--- a/lib/yahns/openssl_client.rb
+++ b/lib/yahns/openssl_client.rb
@@ -93,10 +93,7 @@ def trysendio(io, offset, count)
case buf = @ssl_blocked
when nil
- count = 0x4000 if count > 0x4000
- buf = Thread.current[:yahns_sfbuf] ||= ''.dup
- io.pos = offset
- buf = io.read(count, buf) or return # nil for EOF
+ buf = do_pread(io, count, offset) or return # nil for EOF
buf = @ssl_blocked = buf.dup
when Exception
raise buf
--
EW
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2018-07-16 11:46 7% [PATCH] use IO#pread if available in Ruby 2.5 Eric Wong
2018-08-06 1:32 4% [ANN] yahns 1.16.0 -_- sleepy app server for Ruby Eric Wong
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