Hi
I would like to test for the existence of a .jpg image on a remote
server over HTTP.
I have tried 2 different methods but they are not what I need.
Method 1:
require 'open-uri'
if open('http://example.net/path/to/image.jpg')
# do something
end
Method 2:
require 'net/http'
if Net::HTTP.get 'example.net', '/path/to/image.jpg'
# do something
end
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.
Any help greatly appeciated.
Thanks
Neil
···
--
Posted via http://www.ruby-forum.com/.
Neil Charlton wrote:
Hi
I would like to test for the existence of a .jpg image on a remote server over HTTP.
I have tried 2 different methods but they are not what I need.
Method 1:
require 'open-uri'
if open('http://example.net/path/to/image.jpg'\)
# do something
end
Method 2:
require 'net/http'
if Net::HTTP.get 'example.net', '/path/to/image.jpg'
# do something
end
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
···
--
Alex
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 ?
Thanks
Neil
···
--
Posted via http://www.ruby-forum.com/\.
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?
···
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
