when am running command like this its generating pdf document:
$ wkhtmltopdf http://google.com google.pdf
Loading pages (1/5)
Resolving links (2/5)
Counting pages (3/5)
Printing pages (5/5)
Done
But when using inside app by pdfkit gem it showing error
merb : worker (port 4000) ~ command failed: "/usr/local/bin/wkhtmltopdf" "--page-size" "Letter" "--print-media-type" "--margin-right" "0.0in" "--encoding" "UTF-8" "--margin-top" "0.5in" "--margin-bottom" "0.5in" "--margin-left" "0.0in" "--quiet" "-" "-" - (RuntimeError)
what am tried:
setting path
config.wkhtmltopdf = '/usr/local/bin/wkhtmltopdf '
installing dependencies
sudo aptitude install openssl build-essential xorg libssl-dev
Environment
Ubuntu 12.04 amd64
merb application
ruby 1.8.7
Problem sovled by changing the server port number
from
bundle exec merb -a thin #default port 4000
to
bundle exec merb -a thin -p 3000
and using the gem "wkhtmltopdf-binary"
Explanation
can sometimes find that the single threaded web server we use in development can cause a race condition. the browser is tieing up the one thread available, and begins a new web request to create the pdf files html, which causes a 2nd web request. Since your only web server thread is already in use, you can find this to hang.
To get around this, either run more threads. OR use another port for internal access, and have be the internal URL
Related
I have recently updated to Apache 2.4, and I am using Ruby on Rail to run my application. Following the upgrade, the site shows a content as seen in the image below, and the error on the log file shows this error message. I have tried using the 'Bundle Install' and checked the permission but that hasn't helped. Any advice would be greatly appreciated. Thanks
[ 2022-02-07 07:47:24.5559 8104/7efc89c8f700 age/Cor/App/Implementation.cpp:304 ]: Could not spawn process for application /home/adminuser/hroot: An error occured while starting up the preloader.
Error ID: ba7e6074
Error details saved to: /tmp/passenger-error-RA01E9.html
Message from application: libmysqlclient.so.18: cannot open shared object file: No such file or directory - /usr/local/rvm/gems/ruby-2.0.0-p353#hroot/gems/mysql2-0.3.14/lib/mysql2/mysql2.so (LoadError)
PassengerRuby /usr/local/rvm/gems/ruby-2.0.0-p353#hroot/wrappers/ruby
SetEnv GEM_HOME /root/.gem/ruby/1.9.1
This error shows a problem with the shared objects. You probably updated MySQL/MariaDB libraries with Apache and new libraries are incompatible with your mysql2 gem build. The solution is simple:
First, ensure you are using the ruby-2.0.0-p353#hroot RVM environment.
Then, execute the following command:
gem install mysql2 --version 0.3.14
This should rebuild your mysql2 gem for the new MySQL/MariaDB client libraries on your system.
this isn't the answer anyway but another method to run ruby (in my case Windows 10 ; if you use another OS try to find out how to modify inside index.php the ruby starter)
i post here an alternative method to use apache + php +... and ruby
https://stackoverflow.com/a/71733656/5781320
I am using jruby (1.7.3 or 1.7.9), delayed_job (1.8.4), daemons (1.1.9) gems for my rails 2.3.17 application.
I am trying to start the delayed job server using command:
1. jruby script/delayed_job start
Error:
RuntimeError: ObjectSpace is disabled; each_object will only work with Class, pass -X+O to enable
each_object at org/jruby/RubyObjectSpace.java:173
daemonize at /home/user/projects/new_central_repo/mml/mml_services/vendor/gems/delayed_job-1.8.4/lib/delayed/command.rb:39
(root) at script/delayed_job:5
To resolve this error, I passed "-X+O" option & ran following command:
jruby -X+O script/delayed_job start
This has resolved "ObjectSpace is disabled" error but I am getting following error on local.
Error:
NotImplementedError: fork is not available on this platform
fork at org/jruby/RubyKernel.java:1880
safefork at /home/user/.rvm/gems/ext-jruby-1.7.9#jruby179-rails2317/gems/daemons-1.1.9/lib/daemons/daemonize.rb:11
call_as_daemon at /home/user/.rvm/gems/ext-jruby-1.7.9#jruby179-rails2317/gems/daemons-1.1.9/lib/daemons/daemonize.rb:43
start_proc at /home/user/.rvm/gems/ext-jruby-1.7.9#jruby179-rails2317/gems/daemons-1.1.9/lib/daemons/application.rb:259
start at /home/user/.rvm/gems/ext-jruby-1.7.9#jruby179-rails2317/gems/daemons-1.1.9/lib/daemons/application.rb:296
run at /home/user/.rvm/gems/ext-jruby-1.7.9#jruby179-rails2317/gems/daemons-1.1.9/lib/daemons/controller.rb:70
run_proc at /home/user/.rvm/gems/ext-jruby-1.7.9#jruby179-rails2317/gems/daemons-1.1.9/lib/daemons.rb:197
call at org/jruby/RubyProc.java:290
call at org/jruby/RubyProc.java:224
catch_exceptions at /home/user/.rvm/gems/ext-jruby-1.7.9#jruby179-rails2317/gems/daemons-1.1.9/lib/daemons/cmdline.rb:109
run_proc at /home/user/.rvm/gems/ext-jruby-1.7.9#jruby179-rails2317/gems/daemons-1.1.9/lib/daemons.rb:196
daemonize at /home/user/projects/new_central_repo/mml/mml_services/vendor/gems/delayed_job-1.8.4/lib/delayed/command.rb:45
times at org/jruby/RubyFixnum.java:280
daemonize at /home/user/projects/new_central_repo/mml/mml_services/vendor/gems/delayed_job-1.8.4/lib/delayed/command.rb:43
(root) at script/delayed_job:5
Anyone can help me to resolve this error.
Locally I am able to start my server using "jrake jobs:work" command but I am not whether I can use "jrake jobs:work" instead of "jruby script/delayed_job start".
Thanks.
You cannot use delayed_job on jruby because it relies on Fork which is not available in jruby.
I'm unable to use DBI in my current version of perl on my Mac. When I try to do a simple
my $database = "DBI:Pg:dbname=db;host=localhost";
my $db_user = "user";
my $db_pw = "pw";
my $dbh = DBI->connect($database, $db_user, $db_pw, {'RaiseError' => 1});
I get the following error:
install_driver(Pg) failed: Can't locate DBD/Pg.pm in #INC
Perhaps the DBD::Pg perl module hasn't been fully installed,
or perhaps the capitalisation of 'Pg' isn't right.
I do have two versions of PERL on my machine, but I believe I successfully (using CPAN) installed DBI on the version I am using as a
/Applications/apps/bin/perl -e "use DBI"
does not return an error.
However, I'm not positive I installed the module using CPA as it ends with this message:
Running make install
make test had returned bad status, won't install without force
Failed during this command:
TURNSTEP/DBD-Pg-2.18.1.tar.gz : make_test NO
Do I need to do something other than a
sudo cpan DBD:PG
if I have more than one version of Perl on my machine?
UPDATE: I had a mispelling and should have been doing a sudo CPAN DBI. I've since done that but I'm still getting the same error.
I'm guessing here because you do not show the whole output of CPAN with full error messages.
I suspect that the cause is like in the overwhelming majority of cases that you neglected to install the development headers for PostgreSQL.
I want to ping a site in my ruby code and saw that net-ping was a nice library to do this with. Unfortunately, when I tried to gem install net-ping I got the following error:
C:>gem install net-ping
ERROR: Error installing net-ping:
win32-open3 requires Ruby version < 1.9.0.
upon further research, I found that net-ping was not available yet for 1.9.X. Does anyone have a good piece of code that pings that they would be willing to share.
If by 'site' you mean website, then I wouldn't use ping. Ping will tell you if the host is up (unless a router or firewall is blocking ICMP), but it won't tell you if your web server or web app is responding properly.
If that's the case, I'd recommend Net::HTTP from the standard library, or any of the other HTTP libraries. One way to do it is:
def up?(site)
Net::HTTP.new(site).head('/').kind_of? Net::HTTPOK
end
up? 'www.google.com' #=> true
You can always do this and use regexps to parse the result or just check the exit status:
ping_count = 10
server = "www.google.com"
result = `ping -q -c #{ping_count} #{server}`
if ($?.exitstatus == 0) do
puts "Device is up!"
end
Ping return values that you can check against:
The ping utility returns an exit status of zero if at least one response was heard from the specified host; a status of two if the transmission was successful but no responses were received; or another value (from <sysexits.h>) if an error occurred.
http://www.manpagez.com/man/8/ping
For windows follow these instructions:
download djberg96-net-ping-net-ping-1.5.3-0-g9252076.zip from github.com/djberg96/net-ping
unzip, cd in the folder
gem build net-ping.gemspec
gem install net-ping-1.5.3-universal-mingw32.gem
gem install win32-security
to use it:
require 'net/ping'
p Net::Ping::TCP.new('www.google.com', 'http').ping?
p Net::Ping::TCP.new('foo.bar.baz').ping?
Use from source
gem "net-ping", :git => 'git://github.com/djberg96/net-ping.git'
# bundle install
Now you can use functions from it in 1.9.2
I keep getting this error any time i call any page that has a call that uses RMagick, but i can't figure out what library i'm missing, or what i need to install to get rid of this error. Does anyone have debugging suggestions?
Processing SimpleCaptchaController#simple_captcha (for 127.0.0.1 at 2010-01-14 14:24:24) [GET]
Parameters: {"image_style"=>"", "time"=>"1263500664", "simple_captcha_key"=>"13eec13214d2ce84b725d14c5877fcbe13308cf5", "distortion"=>""}
Could not dump header data for exception: not opened for reading
ArgumentError (unknown format: JPG):
/usr/local/lib/ruby/gems/1.8/gems/fiveruns-dash-ruby-0.8.10/lib/fiveruns/dash/instrument.rb:125:in `perform_action_without_rescue'
...
After re-installing based on this cache of the bellow attempted solution
i am getting this error:
Magick::ImageMagickError (Wrong JPEG library version: library is 62, caller expects 70 `' # jpeg.c/EmitMessage/232):
I had to:
sudo port uninstall jpeg
install image magic using this script on git:
http://github.com/masterkain/ImageMagick-sl
after i was able to install rmagick:
sudo gem install rmagick
now, no more problems.
Their site is down at the moment, but when it comes back online you should run this install script by Solomon White.
http://onrails.org/articles/2009/09/04/rmagick-from-source-on-snow-leopard