Validation for file

i am developing one application in which user uploaded one csv template
to my system(file). but we have to take care that user should uploaded
.csv file only if he trying to upload another file we have to restrict
it.
how to check for extention in ruby on rails ya there is another solution
for it?
i am doing something like
file_name =params[:group_member_information].original_filename
begin
f = File.new("#{path}/#{file_name}", “wb”)
str = params[:group_member_information].read
f.write str
f.close

please reply !

Sunny B. wrote:

i am developing one application in which user uploaded one csv template
to my system(file). but we have to take care that user should uploaded
.csv file only if he trying to upload another file we have to restrict
it.
how to check for extention in ruby on rails

Does this forum say “ruby on rails” anywhere? Or is it your
understanding that any forum that contains the words “ruby” or “rails”
could not possibly be related to precious gems or trains.

In the Ruby programming language, which is what this forum is about, you
could do something like this:

fnames = [“somefile.csv”, “anotherfile.jpg”]

fnames.each do |fname|
pieces = fname.split(".")

if pieces[-1] != “csv”
print "bad file: ", fname
puts
end

end

On 09.05.2008 08:38, 7stud – wrote:

fnames = [“somefile.csv”, “anotherfile.jpg”]

fnames.each do |fname|
pieces = fname.split(".")

if pieces[-1] != “csv”
print "bad file: ", fname
puts
end

end

This is a rather weak check as it only tests the file name. Note, that
you can do this more easily:

ok = /.csv$/i =~ file_name

Kind regards

robert

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