I'm trying to install and configure cgilua on my server. I've installed Apache and lua (5.2.1.4) via apt-get and cgilua (5.2.1-1) via luarocks. on Apache, I've added the lua_mod using a2enmod. I've created a lua.conf file to associate lua-script to lua and lp files.
To test if everything was ok , I used this code:
#!/usr/bin/env lua
cgilua = require "cgilua"
cgilua.htmlheader()
if cgilua.QUERY.language == 'english' then
greeting = 'Hello World!'
elseif cgilua.QUERY.language == 'portuguese' then
greeting = 'Olá Mundo!'
else
greeting = '[unknown language]'
end
cgilua.put('<html>')
cgilua.put('<head>')
cgilua.put(' <title>'..greeting..'</title>')
cgilua.put('</head>')
cgilua.put('<body>')
cgilua.put(' <strong>'..greeting..'</strong>')
cgilua.put('</body>')
cgilua.put('</html>')
And I keep getting this error:
[lua:error] [pid 14909] AH02613: Error loading
/var/www/html/lua/index.lua: /usr/local/share/lua/5.2/cgilua.lua:93:
attempt to index upvalue 'SAPI' (a nil value)
Can somebody shed some light on this issue?
Related
I try to use neovim with fzf plugins. Part of my init.lua is
-- Plugin imstallation section
local install_path = fn.stdpath('data')..'/site/pack/paqs/opt/paq-nvim'
if fn.empty(fn.glob(install_path)) > 0 then
cmd('!git clone --depth 1 https://github.com/savq/paq-nvim.git '..install_path)
end
-- Load the plugin manager
cmd 'packadd paq-nvim'
-- Set the short hand
local plug = require('paq-nvim').paq
-- Make paq manage it self
plug {'savq/paq-nvim', opt=true}
plug {'scrooloose/nerdtree', opt=true}
plug {'vim-airline/vim-airline', opt=true}
plug {'vijaymarupudi/nvim-fzf', opt=false}
plug {'ibhagwan/fzf-lua', opt=false}
require('paq-nvim').install()
require('paq-nvim').clean()
When I try to use command FzfLua files I observe message
fzf error 2 : unknown option: --headless
I work under Windows 10 and I use lua plugins : fzf-lua and nvim-fzf
fzf binary was installed and reachable
I cannot understand why rzr run with this strange option
What I did wrong?
Fzf-lua uses nvim-fzf actions for previews (and other functions) which calls lua functions by running neovim —headless … <lua function id>.
It seems that your neovim version does not support the headless option, I know of other users running fzf-lua on WSL, try with the official 0.5.1 appimage
I want to start a ngrok process when server starts. To achieve this, I coded a ngrok.rb lib and I call it within an initializer
app/lib/ngrok.rb
require "singleton"
class Ngrok
include Singleton
attr_accessor :api_url, :front_url
def start
if is_running?
return fetch_urls
end
authenticate
started = system("ngrok start --all -log=stdout > #{ENV['APP_ROOT']}/log/ngrok.log &")
system("sleep 1")
if !started
return { api: nil, front: nil }
end
urls = fetch_urls
sync_urls(urls["api_url"], urls["front_url"])
return urls
end
def sync_urls(api_url, front_url)
NgrokSyncJob.perform_later(api_url, front_url)
end
def is_running?
return system("ps aux | grep ngrok")
end
def restart
stop
return start
end
def stop
return system("pkill ngrok")
end
def authenticate
has_file = system("ls ~/.ngrok2/ngrok.yml")
if has_file
return true
else
file_created = system("ngrok authtoken #{ENV['NGROK_TOKEN']}")
if file_created
return system("cat " + ENV['APP_ROOT'] + '/essentials/ngrok/example.yml >> ~/.ngrok2/ngrok.yml')
else
return false
end
end
end
def fetch_urls
logfile = ENV['APP_ROOT'] + '/log/ngrok.log'
file = File.open logfile
text = file.read
api_url = nil
front_url = nil
text.split("\n").each do |line|
next if !line.include?("url=") || !line.include?("https")
if line.split("name=")[1].split(" addr=")[0] == "ncommerce-api"
api_url = line.split("url=")[1]
elsif line.split("name=")[1].split(" addr=")[0] == "ncommerce"
front_url = line.split("url=")[1]
end
end
file.close
self.api_url = api_url
self.front_url = front_url
res = {}
res["api_url"] = api_url
res["front_url"] = front_url
return res
end
end
config/initializers/app-init.rb
module AppModule
class Application < Rails::Application
config.after_initialize do
puts "XXXXXXXXXXXXXXXXXXXXXXX"
Ngrok.instance.start
puts "XXXXXXXXXXXXXXXXXXXXXXX"
end
end
end
When I type rails serve, here is a sample of the output
So we know for sure my initializer is being called, but when I look at rails console if it's running, it's not!
But when I type Ngrok.instance.start in rails console, here's the output:
And it starts!
So, my question is: WHY ON EARTH is system("ngrok start --all -log=stdout > #{ENV['APP_ROOT']}/log/ngrok.log &") NOT working on rails serve, but it is on rails console?
UPDATE
If I use 'byebug' within ngrok.rb and use rails serve, when I exit byebug with "continue", the ngrok process is created and works
You're creating an orphaned process in the way that you use system() to start the ngrok process in the background:
system("ngrok start --all -log=stdout > #{ENV['APP_ROOT']}/log/ngrok.log &")
Note the & at the end of the commandline.
I'd need more details about your runtime environment to tell precisely which system policy kills the orphaned ngrok process right after starting it (which OS? if Linux, is it based on systemd? how do you start rails server, from a terminal or as a system service?).
But what's happening is this:
system() starts an instance of /bin/sh to interpret the commandline
/bin/sh starts the ngrok process in the background and terminates
ngrok is now "orphaned", meaning that its parent process /bin/sh is terminated, so that the ngrok process can't be wait(2)ed for
depending on the environment, the terminating /bin/sh may kill ngrok with a SIGHUP signal
or the OS re-parents ngrok, normally to the init-process (but this depends)
When you use the rails console or byebug, in both cases you're entering an interactive environment, which prepares "process groups", "session ids" and "controlling terminals" in a way suitable for interactive execution. These properties are inherited by child processes, like ngrok. This influences system policies regarding the handling of the orphaned background process.
When ngrok is started from rails server, these properties will be different (depending on the way rails server is started).
Here's a nice article about some of the OS mechanisms that might be involved: https://www.jstorimer.com/blogs/workingwithcode/7766093-daemon-processes-in-ruby
You would probably have better success by using Ruby's Process.spawn to start the background process, in combination with Process.detach in your case. This would avoid orphaning the ngrok process.
I’m using Ruby on Rails 4.2.7 on Mac El Capitan and just installed the Tor browser (v 6.0.4). I fired up my Tor browser, have verified its running by viewing a couple of web pages, but using this gem — https://github.com/dryruby/tor.rb , when I run my script, Ruby doesn’t believe Tor is running
require 'tor'
...
puts "avaailble: #{Tor.available?}"
puts "version: #{Tor.version}"
Returns
avaailble: false
version:
Indeed, when I try and make a Tor request using the https://github.com/brunogh/tor_requests gem, the web page request returns immediately, leading me to believe the Tor network isn’t being used because in a Tor browser it takes much longer (here is the code I’m using to amen a web page request) …
uri = URI.parse(url)
Net::HTTP.SOCKSProxy('127.0.0.1', 9150).start(uri.host, uri.port) do |http|
f = http.get(uri.path)
end
How do I make my Ruby/Rails code connect to my locally running Tor network?
Edit: In respnse to the answer given, here is what I set my PATH and DYLD_LIBRARY_PATH variables to …
localhost:myproject davea$ echo $PATH
/usr/local/opt/coreutils/libexec/gnubin:/opt/local/bin:/opt/local/sbin:/Users/davea/.rvm/gems/ruby-2.3.0/bin:/Users/davea/.rvm/gems/ruby-2.3.0#global/bin:/Users/davea/.rvm/rubies/ruby-2.3.0/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/mysql/bin/:/opt/gradle-2.7/bin:/opt/apache-maven-3.3.3/bin:/Users/ davea/.rvm/bin:/usr/local/mysql/bin:/Applications/TorBrowser.app/Contents/MacOS/Tor:/Users/davea/.rvm/bin:/usr/local/mysql/bin:/Applications/TorBrowser.app/Contents/MacOS/Tor
localhost:myproject davea$ echo $DYLD_LIBRARY_PATH
/Applications/TorBrowser.app/Contents/MacOS/Tor:/usr/local/mysql/lib:/usr/local/mysql/lib:
and here is ht output in my Rails console trying the commands listed …
localhost:myproject davea$ rails console
Running via Spring preloader in process 49987
Loading development environment (Rails 4.2.7.1)
2.3.0 :001 >
2.3.0 :002 > Tor::Config::CONFDIR = '/Applications/TorBrowser.app//Contents/MacOS/Tor'
(irb):2: warning: already initialized constant Tor::Config::CONFDIR
/Users/davea/.rvm/gems/ruby-2.3.0/gems/tor-0.1.2/lib/tor/config.rb:21: warning: previous definition of CONFDIR was here
=> "/Applications/TorBrowser.app//Contents/MacOS/Tor"
2.3.0 :003 > Tor.available?
Here is how you can make brunogh/tor_requests work with Tor Browser (easy):
require 'tor_requests'
Tor.configure do |config|
config.ip = "127.0.0.1"
config.port = "9150"
config.add_header('User-Agent', 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:48.0) Gecko/20100101 Firefox/48.0')
end
res = Tor::HTTP.get(URI('https://drew-phillips.com/ip-info/'))
p res.code
p res.body
To get dryruby/tor working involved a bit more work:
It depends on your ENV PATH variable to find the Tor binary and Tor browser has some libraries (at least on Linux) within it's path that aren't found if you try to execute it directly. Seems this should support allowing you to add the path in code instead of relying on PATH in my opinion.
Trying to run Tor Browser's tor binary from the console yields (more on this later, may not apply to Mac):
tor: symbol lookup error: tor-browser_en-US/Browser/TorBrowser/Tor/tor: undefined
symbol: evutil_secure_rng_set_urandom_device_file
Also, installing the Gem from source doesn't give us the latest version available on GitHub and there appears to be a fix to the version method that isn't included with the Gem version 0.1.2. Because of this I pulled the source and tell the program to load the Gem from a custom path.
The working code:
require 'rubygems'
$:.unshift "./tor/lib"
require 'tor'
Tor::Config::CONFDIR = '/home/me/tor-browser_en-US/Browser/TorBrowser/Data/Tor'
p Tor::Config::CONFDIR
p Tor.available?
p Tor.version
Now, in order to have it run successfully, you'll need to set your PATH and LD_LIBRARY_PATH (on Mac this is DYLD_LIBRARY_PATH I believe).
So I run the Ruby code like this:
PATH=/home/me/tor-browser_en-US/Browser/TorBrowser/Tor:$PATH \
LD_LIBRARY_PATH=/home/me/tor-browser_en-US/Browser/TorBrowser/Tor:$LD_LIBRARY_PATH \
ruby tor.rb
This puts Tor Browser as the first search path for binaries and libraries.
Then with this I was able to get the following output:
true
"0.2.8.6"
Hope that helps!
This is the test script I am trying to execute:
local cjson = require "cjson"
local json_text = '[ true, { "foo": "bar" } ]'
local value = cjson.decode(json_text)
return 'Decoded: ' .. value
Its giving a strange response:
evalsha 76b573109be38414056b58c749016a56052063bd 0
(error) ERR Error running script (call to f_76b573109be38414056b58c749016a56052063bd): #enable_strict_lua:15: user_script:1: Script attempted to access unexisting global variable 'require'
How come the compiler isn't able to understand the keyword "require"? I am using redis 3.0.5 (running Lua 5.1)
require is not available within Redis, libraries are preloaded. Just remove the first line of your script and it should work.
I want to ssh to one of the linux servers and then run some commands. Below is the ruby script.
require 'socket'
require 'rubygems'
require 'net/ssh'
#hostname = "hostname"
#username = "user"
#password = "pass"
#cmd = "ls -alt"
begin
ssh = Net::SSH.start(#hostname, #username, :password => #password)
res = ssh.exec!(#cmd)
ssh.close
puts res
rescue
puts "Unable to connect to #{#hostname} using #{#username}/#{#password}"
end
It gives me the correct output but before giving the output it prints the following warning message:
ruby ssh.rb
Nov 5, 2014 3:21:02 PM jnr.netdb.NativeServicesDB load
WARNING: Failed to load native services db
java.lang.UnsatisfiedLinkError: /lib/libc.so.6: wrong ELF class: ELFCLASS32
at jnr.ffi.provider.jffi.NativeLibrary.loadNativeLibraries(NativeLibrary.java:87)
at jnr.ffi.provider.jffi.NativeLibrary.getNativeLibraries(NativeLibrary.java:70)
at jnr.ffi.provider.jffi.NativeLibrary.getSymbolAddress(NativeLibrary.java:49)
at jnr.ffi.provider.jffi.NativeLibrary.findSymbolAddress(NativeLibrary.java:59)
at jnr.ffi.provider.jffi.AsmLibraryLoader.generateInterfaceImpl(AsmLibraryLoader.java:125)
at jnr.ffi.provider.jffi.AsmLibraryLoader.loadLibrary(AsmLibraryLoader.java:63)
at jnr.ffi.provider.jffi.NativeLibraryLoader.loadLibrary(NativeLibraryLoader.java:43)
at jnr.ffi.LibraryLoader.load(LibraryLoader.java:228)
at jnr.ffi.Library.loadLibrary(Library.java:123)
at jnr.ffi.Library.loadLibrary(Library.java:80)
at jnr.netdb.NativeServicesDB.load(NativeServicesDB.java:81)
at jnr.netdb.Service$ServicesDBSingletonHolder.load(Service.java:122)
at jnr.netdb.Service$ServicesDBSingletonHolder.<clinit>(Service.java:118)
I did some research and found this https://jira.codehaus.org/browse/JRUBY-7183 but did not understand the solution. Can somebody please guide me on this?
Thanks.