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Tuesday, 1 December 2015

基于erlang的webserver程序－yaws

Yaws is a webserver for dynamic content written in Erlang.
Travis build Status

Prepare build

Get and install an Erlang system (http://www.erlang.org).
To compile Yaws, Erlang/OTP R14B02 or higher is required.
For SSL-enabled instances, Erlang/OTP R16B01 or higher is required in order to allow only specific protocol versions.
If you've cloned the source from github and you want to build using autotools, note there is no ./configure script in the source, so create one:
$> autoreconf -fi
Install build dependencies. Required packages to compile Yaws are (based on debian packages):
  • build-essential
  • autoconf/automake/libtool
  • erlang - Required apps:
    • erlang-{kernel/stdlib/sasl/erts}
    • erlang-compiler
    • erlang-crypto
    • erlang-xmerl
  • libpam0g-dev
To build the documentation (optional), you also need to install:
  • texlive-latex-base
  • texlive-latex-recommended
  • texlive-fonts-recommended
  • texlive-font-utils
  • texlive-extra-utils
  • ghostscript
On Ubuntu/debian this is pretty much equal to:
$> apt-get build-dep yaws
Finally, to run the testsuites, yaws need to install:
  • git
  • wget
  • curl
  • erlang-eunit
  • erlang-inets
  • erlang-mnesia
  • erlang-ssl
  • cadaver

Build

You can build using rebar:
$> rebar get-deps compile
or via autotools:
$> ./configure --prefix=/usr/local
If using rebar, you'll get a "local installation" with Yaws script in ./bin and the Yaws configuration file in ./etc/yaws.
If using autotools, the build will be configured by default for installation under /usr/local. For more information about installation directories and other supported options, see the configure help. Useful options are:
--with-defaultcharset=CHARSET specify default charset, i.e UTF-8
--with-extrainclude=DIR       dir to include if e.g. pam is installed in some odd place
--with-erlang=PREFIX          prefix where Erlang is installed (optional)
Note to packagers (rpm, deb ...) All install targets support the DESTDIR variable. Thus, if we do
$> ./configure --prefix=/usr; make
we can subsequently do:
$> make install DESTDIR=/foo/bar
All Yaws files will be installed under DESTDIR, but all code will assume Yaws should be installed under /usr.
Main make targets:
  • all : compile Yaws
  • debug : compile Yaws with debug flags
  • clean : remove files produced by all or debug target
  • install : do a proper install of Yaws
  • doc or docs : build the documentation
  • check or test : launch tests
  • cleantest : remove files produced by check target
  • dialyzer : run dialyzer on Yaws
  • mkinstaller : build an installer for windows
  • cleaninstaller: remove files produced by mkinstaller target
  • apps : compile Yaws applications (chat,mail,wiki,yapp)
  • cleanapps : remove files produced by apps target
  • installapps : install Yaws applications
  • fullinstall : install + installapps
  • fullclean : clean + cleantest + cleanapps + cleaninstaller

Test your build

With autotools, to test the build, you should install it somewhere:
$> ./configure --prefix=$PWD/_inst && make install
$> $PWD/_inst/bin/yaws -i
If you used rebar to compile Yaws, you can alternatively start Yaws with
$> ./bin/yaws -i
Either approach will start a webserver at http://0.0.0.0:8000 Terminate through ^C, or ^G followed by q, or
> init:stop()
NOTE: If you've used rebar to build the system, none of the following directions apply. With rebar only "local installations" are supported.

Install and run

NOTE: following commands may require root privileges, depending of the installation prefix.
Just run:
$> make install
Then, to run Yaws, you should use its script:
$> ${bindir}/yaws -i
This starts an interactive system.
With the default yaws.conf file, this will create a webserver at http://${host} and one at https://${host}.
You can adapt Yaws configuration by editing '${sysconfig}/yaws/yaws.conf'.

Daemonize Yaws

Start it using '--daemon' and '--heart' options:
$> ${bindir}/yaws --daemon --heart
This will start a daemon (--daemon) which will be autorestarted when/if it crashes or hangs (--heart). Also, for most unices, we create proper start scripts in ${sysconfdir}/init.d
Example: Here is how I compile/start the yaws system that runs at http://yaws.hyber.org (Ubuntu server system)
$> autoreconf -fi
$> ./configure --sysconfdir=/etc
$> make && make install
$> /etc/init.d/yaws start
from https://github.com/klacke/yaws
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