On Mar 18, 9:00 pm, Adam Ziemba <[email protected]> wrote: > Colin Law wrote: > > > > open("http://chart.apis.google.com/chart#{CGI.escape('?cht=bvg&chbh=a&chd=s:vttusty&chs=500x300&chxt=x,y&chxl=0:|Sun > > |Mon|Tue|Wed|Thu|Fri|Sat|1:|0|2|4|6|8|10|12')}") > > do |chart| > > File.open('chart.png', 'w') {|f| f.write chart.read } > > end > > I definitely understand the why you would want to escape the URI, but > I'm not convinced that this approach will never work. > > The URL with the escaped characters causes Google to reject it as > invalid parameters, which is why you got all that HTML and Javascript. > E.g. if you use your browser to open the result of the above URI with > escaped characters: > > http://chart.apis.google.com/chart%3Fcht%3Dbvg%26chbh%3Da%26chd%3Ds%3... > > You are redirected to the Google chart API. Retaining the original > characters with: > > http://chart.apis.google.com/chart?cht=bvg&chbh=a&chd=s:vttusty&chs=5...Sun|Mon|Tue|Wed|Thu|Fri|Sat|1:|0|2|4|6|8|10|12 > > you'll get a PNG image and nothing else. > > Okay, so Google doesn't want the escaped characters, and the URI::open > method doesn't want the plain characters... or does it? Is there no way > around this? The thing is the characters used in the URL above are > valid, or so I thought. I pass these kind of characters as parameters > from controller to view all throughout my application, with full browser > compatibility. > > I tried using backslashes for all the characters, e.g. "\&" instead of > "&" and the URI open method still rejects it. > > I've seen some people successfully get images to save to the file system > using URI, but I'm assuming all their code is outdated as I could not > get it to work. Also, the image URL they were using actually pointed to > a PNG image, with a PNG extension, whereas the Google Chart URL will > return a PNG image. > > I appreciate all the help! > -- > Posted viahttp://www.ruby-forum.com/.
Seems an inadequacy of Ruby URI library. Curb (Ruby libcurl bindings) works simply and easily though: ruby-1.9.1-p376 > require 'open-uri' => true ruby-1.9.1-p376 > png = "http://chart.apis.google.com/chart? cht=bvg&chbh=a&chd=s:vttusty&chs=500x300&chxt=x,y&chxl=0:|Sun|Mon|Tue| Wed|Thu|Fri|Sat|1:|0|2|4|6|8|10|12" => "http://chart.apis.google.com/chart? cht=bvg&chbh=a&chd=s:vttusty&chs=500x300&chxt=x,y&chxl=0:|Sun|Mon|Tue| Wed|Thu|Fri|Sat|1:|0|2|4|6|8|10|12" ruby-1.9.1-p376 > open png URI::InvalidURIError: bad URI(is not URI?): http://chart.apis.google.com/chart?cht=bvg&chbh=a&chd=s:vttusty&chs=500x300&chxt=x,y&chxl=0:|Sun|Mon|Tue|Wed|Thu|Fri|Sat|1:|0|2|4|6|8|10|12 from /home/xeno/.rvm/ruby-1.9.1-p376/lib/ruby/1.9.1/uri/ common.rb:156:in `split' from /home/xeno/.rvm/ruby-1.9.1-p376/lib/ruby/1.9.1/uri/ common.rb:174:in `parse' from /home/xeno/.rvm/ruby-1.9.1-p376/lib/ruby/1.9.1/uri/ common.rb:626:in `parse' from /home/xeno/.rvm/ruby-1.9.1-p376/lib/ruby/1.9.1/open- uri.rb:32:in `open' from (irb):3 from /home/xeno/.rvm/ruby-1.9.1-p376/bin/irb:15:in `<main>' ruby-1.9.1-p376 > require 'curb' => true ruby-1.9.1-p376 > c = Curl::Easy.perform png => #<Curl::Easy http://chart.apis.google.com/chart?cht=bvg&chbh=a> ruby-1.9.1-p376 > File.open("png.png", "w") {|f| f.write c.body_str} => 5445 ruby-1.9.1-p376 > -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
