Forum: Ruby on Rails How do you download a file from the web and save it locally?

I'm trying to learn Ruby.  A task I'm trying to do is download a file 
from
the web and save it locally.

I'm looking at http://ruby.bastardsbook.com/chapters/io/ and trying to
implement the solution in the "Exercise: Copy Wikipedia's front page to 
a
file using block notation" section, but it's not working for me.  The 
error
message I get is:

/home/jhsu/.rvm/rubies/ruby-1.9.3-p385/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in
`require': cannot load such file -- rest-client (LoadError)
    from
/home/jhsu/.rvm/rubies/ruby-1.9.3-p385/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in
`require'
    from test.rb:4:in `<main>'


What am I missing?  Would another approach be better?

Jason Hsu, Android developer wrote in post #1097902:
> I'm trying to learn Ruby.  A task I'm trying to do is download a file
> from
> the web and save it locally.
>
> I'm looking at http://ruby.bastardsbook.com/chapters/io/ and trying to
> implement the solution in the "Exercise: Copy Wikipedia's front page to
> a
> file using block notation" section, but it's not working for me.  The
> error
> message I get is:
>
> 
/home/jhsu/.rvm/rubies/ruby-1.9.3-p385/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in
> `require': cannot load such file -- rest-client (LoadError)
>     from
> 
/home/jhsu/.rvm/rubies/ruby-1.9.3-p385/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in
> `require'
>     from test.rb:4:in `<main>'
>
>
> What am I missing?  Would another approach be better?

Did you install the rest-client gem?

gem install rest-client

You you don't have the gem installed Ruby can't very well load it. 
Usually when you see that custom_require it assumes the name you gave in 
require statement is custom since it wasn't found in the list of gems.

On Tue, Feb 19, 2013 at 11:20 PM, Jason Hsu, Android developer
<jhsu802701@gmail.com> wrote:
>     from
> 
/home/jhsu/.rvm/rubies/ruby-1.9.3-p385/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in
> `require'
>     from test.rb:4:in `<main>'
>
>
> What am I missing?  Would another approach be better?


Did you do this chapter first?
http://ruby.bastardsbook.com/chapters/methods-and-gems/

save_path="/your/local/path/filename"
    File.open(save_path, 'wb') do |file|
      file << open('download_file_url').read
    end



On Thu, Feb 21, 2013 at 2:19 AM, tamouse mailing lists <
tamouse.lists@gmail.com> wrote:

> > message I get is:
> >
> email to rubyonrails-talk+unsubscribe@googlegroups.com.
> To post to this group, send email to rubyonrails-talk@googlegroups.com.
> For more options, visit https://groups.google.com/groups/opt_out.
>
>
>


--
Regards by
Saravanan.P