nehresma / cupsffi Goto Github PK

Maybe instead of returning an exception is is better to return this in the status ?
as in:

job.status
=> :job_not_found

Great work, and thanks for the gem, but I don't see any way to get all of the jobs for a printer. This is needed for managing the queue and editing jobs that weren't created in the application.

I just need to inform you that you should document that for remote printing closing the connection is required because if the connection didn't get closed this will eventually freeze your app server. I have experienced this with PUMA as app server.

The strange thing when I read the code the close method already exist but there not mention to use it in the documentation.

Hello,
Is this still an active project? There are some forks of this code in Github that have some additional options added. Are you willing to accept code contributions from others and include it in here for updates to this library?

I'm using cupsffi to print a document that is generated on a jasper server.

I'm using rest-client to interact with the jasper server rest api.

After I run and fetch the report I get the following output:

"%PDF-1.4\n%\xE2\xE3\xCF\xD3\n3 0 obj\n<</Length 58/Filter/FlateDecode>>stream\nx\x9C+\xE4r\n\xE126S02Q\bI\xE1r\r\xE1\n\xE42R\xF0\x02\t\x1A*\x18\x00!\x8843P\b\xC9\xE5\xD2w3T0\x04\xB2\xD2\xB844C\xB2@J\x01h;\v\xDB\nendstream\nendobj\n1 0 obj\n<</Group<</Type/Group/CS/DeviceRGB/S/Transparency>>/Parent 4 0 R/Contents 3 0 R/Type/Page/Resources<</ProcSet [/PDF /Text /ImageB /ImageC /ImageI]/ColorSpace<</CS/DeviceRGB>>/Font<</F1 2 0 R>>>>/MediaBox[0 0 76 60]>>\nendobj\n5 0 obj\n[1 0 R/XYZ 0 70 0]\nendobj\n2 0 obj\n<</BaseFont/Helvetica/Type/Font/Encoding/WinAnsiEncoding/Subtype/Type1>>\nendobj\n4 0 obj\n<</ITXT(2.1.7)/Type/Pages/Count 1/Kids[1 0 R]>>\nendobj\n6 0 obj\n<</Names[(JR_PAGE_ANCHOR_0_1) 5 0 R]>>\nendobj\n7 0 obj\n<</Dests 6 0 R>>\nendobj\n8 0 obj\n<</Names 7 0 R/Type/Catalog/ViewerPreferences<</PrintScaling/AppDefault>>/Pages 4 0 R>>\nendobj\n9 0 obj\n<</Creator(JasperReports \(assay_label_small\))/Producer(iText 2.1.7 by 1T3XT)/ModDate(D:20130422184845+01'00')/CreationDate(D:20130422184845+01'00')>>\nendobj\nxref\n0 10\n0000000000 65535 f \n0000000139 00000 n \n0000000405 00000 n \n0000000015 00000 n \n0000000493 00000 n \n0000000371 00000 n \n0000000556 00000 n \n0000000610 00000 n \n0000000642 00000 n \n0000000745 00000 n \ntrailer\n<</Root 8 0 R/ID [<40528028e4bc756ecf16988a0ab9401e>]/Info 9 0 R/Size 10>>\nstartxref\n912\n%%EOF\n"

When I try to print this with the "application/pdf" mime_type I receive "ArgumentError: string contains null byte"

I went to cups to see if the job was created, and it is, although is showed as "held" and with size of 0Kb.

If I try to print again, right after the first error, I get a "RuntimeError: Undefined error: 0" and I can no longer see the printer after I call "CupsPrinter.get_all_printer_names". Only if I restart my rails console I'm able to get the printers configured on the cups server.

Thanks.

Hello there,
I've been using CUPS in a project and I am running into a few issues that couldn't figure it out yet.
How can I send the option '-o landscape' to the printer using the 'print_file' method?

In the documentation it only refers to examples that are key, value pairs ({'InputSlot' => 'Upper', 'PageSize' => 'A4'}).

I tried many different ways but I always get an error.
I know the printer supports it because my files prints correctly when I use 'lpr' command line.

Thanks,
Helio

Your CupsFFI library has been very useful to me. However, I needed a way to fetch PPD attributes, as well as page size. So I added the code. I'd not worked with FFI before, so I may have done some things wrong, but it's working already for me.

I'm trying to send you a patch, but I can't seem to attach one here, or include it without it being marked up. How should I send it to you?

Howdy,

Loving this gem, thanks! I'm having trouble changing the number of copies to print.

I've tried:

@printer = CupsPrinter.new(params[:name], hostname: @hostname, 'copies' => 2)
@printer.print_file('./public/test.pdf') 

and

@printer = CupsPrinter.new(params[:name], hostname: @hostname, copies: 2)
@printer.print_file('./public/test.pdf')

and various other combinations including passing copies to the print_file method.

Thanks for any help!

Hello.
I was checking out your gem and ran into the following error, right after gem install cupsffi ( whihc build jsut fine)
I'm getting a load error on require 'cupsffi'.

I'm running fine under cups gem or from the command line.
Using rvm ruby 1.9.2p290 and Cups 1.5.0 on a Debian 6 x64 system

Here is an error:

            LoadError: no library specified
            from /usr/local/rvm/gems/ruby-1.9.2-p290/gems/ffi-1.0.11/lib/ffi/library.rb:150:in `ffi_libraries'
            from /usr/local/rvm/gems/ruby-1.9.2-p290/gems/ffi-1.0.11/lib/ffi/library.rb:228:in `attach_function'
            from /usr/local/rvm/gems/ruby-1.9.2-p290/gems/cupsffi-0.0.5/lib/cupsffi/lib.rb:176:in `<module:CupsFFI>'
            from /usr/local/rvm/gems/ruby-1.9.2-p290/gems/cupsffi-0.0.5/lib/cupsffi/lib.rb:25:in `<top (required)>'
            from /usr/local/rvm/rubies/ruby-1.9.2-p290/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:55:in `require'
            from /usr/local/rvm/rubies/ruby-1.9.2-p290/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:55:in `require'
            from /usr/local/rvm/gems/ruby-1.9.2-p290/gems/cupsffi-0.0.5/lib/cupsffi.rb:3:in `<top (required)>'
            from /usr/local/rvm/rubies/ruby-1.9.2-p290/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:59:in `require'
            from /usr/local/rvm/rubies/ruby-1.9.2-p290/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:59:in `rescue in require'
            from /usr/local/rvm/rubies/ruby-1.9.2-p290/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:35:in `require'
            from (irb):1
            from /usr/local/rvm/rubies/ruby-1.9.2-p290/bin/irb:16:in `<main>'

Hi.

I'm playing around with cupsffi. In my setup CUPS server is remote and i'm printing from a client server that runs my Rails app.

cupsffi - automatically picked up connection from /etc/cups/client.conf and a list of all printers

I setup my printer in config ( using configatron ) like so:

configatron.printers.it = CupsPrinter.new('1-ITD-PRINT1')

Here is the issue.
After I start my rails console and do some test printing it works fine. But if I do something else and then come back to printing in a few minutes it seems that is timed out and I can't get it to do anything: print, list printers, or jobs

The only way to restart connection is either restart the app, or recreate connection specifying the server

configatron.printers.it = CupsPrinter.new('1-ITD-PRINT1', {hostname: 192.168.1.38})

Now I can print again. Until I leave printing for a few minutes and then the connection is timed out again.

When it becomes an issue:
well in development - for sure - but I can just recreated the connection.
But it may be an issue in some of the rake tasks - I have some long runing tasks - reports, updates, and some of them do a fair amount of printing, with some idle periods between the jobs. Right now I'm sending system commands, but I'd like to avoid that - so I'm tryuing out cupffi

So is this supposed to happen?
If so where is the time out set and is it possible to control it?
If the connection is lost, do I need to destroy the printer object / close connection? I don't want to pollute memory with a bunch of unwanted and unused printer objects.

Thank you!

This may or may not be a cupsffi problem. When we print we normally get page numbers, but with cupsffi I cannot get the page numbers to appear. Cups.org talks about a prettyprint option, but it comes back as invalid whenever I try to pass it.

printer.print_file(printable.pdf_file, 'prettyprint' => 'prettyprint')

Any suggestions?

on my Rails application cupsffi works perfectly fine but when I set up resque to create workers, for printing, cupsffi gem crashes with a segmentation fault. Here is the output: http://pastie.org/2399866

Can anyone at least point me in the right direction? Any help would be greatly appreciated.

First of all: great gem, loving it!

I've tried passing {'copies' => 40} to a .print_datacall, but got a message that this option is not supported by the printer.

Digging in the source code, I found out, that you validate the options against the PPD. But copies seems to be a generic option, available in all printers. Simply disabling the option validation did work: I've been able to pass the copies option and the printer respected it.

I'm no CUPS specialist and thus not sure if there are any other such generic options.

I am trying to print .prn file using this gem, but its treating prn file as text file.

Please suggest