From: Logan Capaldo <logancapaldo@...>
Date: 2006-08-17T22:29:01+09:00
Subject: Re: Newbie - Test For JPEG Image Over HTTP


On Aug 17, 2006, at 8:16 AM, Alex Young wrote:

> Neil Charlton wrote:
>> Alex Young wrote:
>>> Neil Charlton wrote:
>>>> if open('http://example.net/path/to/image.jpg')
>>>> The server where the images are always returns a default page if  
>>>> the images do not exist so the code above always returns.
>>>>
>>>> What I need is a way to check what is returned is not a html  
>>>> page but is a .jpg image.
>>>>
>>> Oh.  Try this:
>>>
>>> require 'net/http'
>>>
>>> def url_is_a_jpg(url)
>>>    u = URI.parse(url)
>>>    h = Net::HTTP.new(u.host, u.port)
>>>    r = h.head(u.path)
>>>    return r.content_type == 'image/jpeg'
>>> end
>> Hi Alex
>> Thanks for your help. I can see what you are doing there  
>> unfortunately I get the following error
>> isjpg.rb:7:in `url_is_a_jpg': undefined method `content_type' for  
>> #<Net::HTTPOK 200 readbody=true> (NoMethodError)
>> ruby -v is
>> ruby 1.8.2 (2004-12-25) [x86_64-linux]
>> Any ideas ?
> Is that for a path that does exist, doesn't exist, or both?
>
> -- 
> Alex
>

Try r.response.content_type == 'image/jpeg' perhaps?