I'm trying to send a pdf back to the user but I'm having serious problem getting send_file and send_data to work. I created the pdf file as follows:
tmp = Tempfile.new('filled')
new_tmp_path = PDFPrint.fill_form_using_pdftk(template_path, tmp.path)
send_file (new_tmp_path, :filename => 'filled.pdf')
The browser prompts for a download, but the downloaded filled.pdf file has zero byte.
I have verified that new_tmp_path does contain a valid pdf (good, filled content)
I have tried this:
File.open(new_tmp_path, 'r') do |f|
send_data(f.read, :filename => "filled.pdf")
end
But this also gives me the same download->zero-byte problem, while the file on server (new_tmp_path) has perfect content.
Regards,
Try sending a simple file to see if it works
send_file '/path/to.jpeg', :type => 'image/jpeg', :disposition => 'inline'
Read this thread, I think it has everything you need.
Related
I'm trying to stream a large Amazon S3 file to the browser using the Rails send_data method, however because the file is so large, the server runs out of memory and cannot complete the request.
The code looks something like this:
def download
s3_obj.read
end
def download_file
send_data(file.download, :filename => filename, :type => 'application/gzip', :disposition => 'attachment')
end
Is there a way to stream the chunks of the file with send_data so that it's a single file in the browser? the way I understand it is that send_data has to load the entire file into memory, then send all of that at once.
You should use send_file instead of send_data as it allow you to set the buffer and more option.
More information here.
UPDATE
If you want to download from S3, you can do this:
def download
data = open("S3_OBJECT_URL")
send_file data.read, filename: filename, type: "application/gzip", disposition: 'attachment', stream: 'true', buffer_size: '4096'
end
or
redirect_to s3_object.file.url
My Rails 3.1 app makes a web service call to get a pdf file that I then need to send to the browser for download.
The XML response is something like this:
<RenderResponse>
<Result>blahblah this is the file info<Result>
<Extension>PDF</Extension>
<MimeType>application/pdf</MimeType>
</RenderResponse>
I am then trying to convert the "Result" tag to a file as so:
#report = #results[:render_response][:result]
#report_name = MyReport.pdf
File.open(#report_name, "w+") do |f|
f.puts #report
end
finally I try to send to the browser:
send_file File.read(#report_name), :filename => #report_name, :type => "application/pdf; charset=utf-8", :disposition => "attachment"
This yields an error the says "Cannot Read File" and it spits out all the text from the results tag.
If I use send_data as so:
send_data File.read(#report_name).force_encoding('BINARY'), :filename => #report_name, :type => "application/pdf; charset=utf-8", :disposition => "attachment"
The download works but I get a file with 0KB and an Adobe Error that says the file "MyReport.pdf" can't be opened because "its either not a supported file type or it has been damaged".
How can I take the XML response file info, create the file, and stream to the browser?
I found the solution. send_file is the correct stream mechanism to use but I needed to decode the string while writing to the file. I also need to add the 'b' parameter to the File.open call.
This works:
File.open(#report_name, "wb+") do |f|
f.puts Base64.decode64(#report)
end
#file = File.open(#report_name, 'r')
send_file #file, :filename => #report_name, :type => "application/pdf; charset=utf-8", :disposition => "attachment"
I'm using rails to send a pdf back to the client and in Firefox the file extension is not showing:
My rails code looks like this:
send_data(
pdf,
:type => "application/pdf",
:disposition => "attachment; filename=transcript_#{Time.zone.now.strftime('%m-%d-%Y %H:%M')}.pdf",
# :filename => "transcript_#{Time.zone.now.strftime('%m-%d-%Y %H:%M')}.pdf"
)
I've been trying to set the file name with a combination of the :filename and :disposition key to display the correct filename in the browser. The :filename key doesn't seem to work in Firefox and the :disposition key gives me the picture above.
What do I need to change to get the pdf file extension to be shown in Firefox?
The space (inside of the time format) is throwing off the file name. You need to surround the file name in quotes.
Try this:
:disposition => "attachment; filename=\"transcript_#{Time.zone.now.strftime('%m-%d-%Y %H:%M')}.pdf\"",
^^ ^^
This behavior is explained here: http://kb.mozillazine.org/Filenames_with_spaces_are_truncated_upon_download.
The key point being that
[The space] creates an ambiguity when parsing the header for the filename when the browser has to consider the possibility of internationalized filenames. As Internet Explorer does not have to worry about this, it will parse the filename until the end of the line. Mozilla will not.
this will definitely work
send_data pdf.render, filename: 'transcript_#{Time.zone.now.strftime('%m-%d-%Y %H:%M')}.pdf',
type: 'application/pdf',
disposition: "attachment"
I wrote the following code.
def help_doc
pdf_filename = File.join(Rails.root, "/public/doc.pdf")
send_file(pdf_filename, :filename => "doc.pdf" :type => "application/pdf", :diposition => "inline")
end
It's working, but not as I want. I'd like to view in the browser the pdf, but it's doing download of the document.
I thought that just writing :disposition => "inline" and I could see on the browser the pdf.
Try removing the content disposition. You have a typo in your code, deposition vs disposition, and you're missing a comma after filename.
I'm using Rails to generate a PDF with the executable wkhtmltopdf and then using send_data to send the result back to the user as a PDF file.
view = ActionView::Base.new(ActionController::Base.view_paths, {})
html = "<h1>A heading</h1>"
pdfdata = `echo '#{html}' | #{RAILS_ROOT}/lib/pdf/wkhtmltopdf-i386 - -`
send_data pdfdata, :filename => 'readthis.pdf', :disposition => 'attachment', :type => "application/pdf"
The PDF is generated properly, but Rails complains ArgumentError (invalid byte sequence in UTF-8) from the send_data method. Changing it to send "foobar" as :type => text/html makes it work, so it's definitely got a problem with pdfdata.
I don't understand. Isn't send_data supposed to send binary data? Of course it's not valid UTF-8. Or am I missing something?
Thanks
Rails assumes UTF-8. Telling it explicitly that it is binary data solves the problem. Thanks for your help.
pdfdata.force_encoding('BINARY')
Did you inspect the variable pdfdata and check whether it is proper or not?