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Beginner Question with Net::Proxy
Richard Cole
4/7/2005 3:06:00 AM
Hi,
I'm trying without success to do an http get via a proxy using net/http
and I just can't work it out. Got any suggestions where I'm going wrong,
how the code could be made simpler? Are there any decent docs for the
library net library? My non working code follows.
I redefined the InternetMessageIO method connect to see what the
net/http library is doing and it isn't using the proxy settings.
regards,
Richard.
-----
require 'net/http'
require 'cgi'
class HttpGetError < Exception
attr_reader :response
def initialize(response)
@response = response
end
end
module Net
class InternetMessageIO
def connect( open_timeout )
puts "LOG: opening connection to #{@address}..."
timeout(open_timeout) {
@socket = TCPsocket.new(@address, @port)
}
@rbuf = ''
end
end
end
class PubMed
attr_reader :proxy_addr, :proxy_port, :proxy
def initialize
@einfo = "
http://eutils.ncbi.nlm.nih.gov/entrez/eutils/einfo....
@proxy_addr = "proxy" # this is my local proxy
@proxy_port = 80
@proxy = Net::HTTP::Proxy(@proxy_address, @proxy_port)
end
def query(base, cgi_args)
uri = URI.parse(base)
cgi_arg_list = cgi_args.collect { |h,v| h + "=" + CGI.escape(v) }
uri.query = cgi_arg_list.join("&")
puts "Fetching .... " + uri.to_s
@proxy.start(uri.host, uri.port) { |http|
resp = @proxy.get(uri.path + "?" + uri.query)
puts resp.class
resp = http.get(uri)
if resp.message == "OK" then
return resp.data
else
raise(HttpGetError.new(response), "Http Get Failed: " +
response.to_s)
end
}
end
def databases
return query(@einfo, {})
end
end
pubmed = PubMed.new
puts "Databases:"
puts pubmed.databases
1 Answer
Assaph Mehr
4/7/2005 3:56:00 AM
0
> class PubMed
>
> attr_reader :proxy_addr, :proxy_port, :proxy
>
> def initialize
> @einfo =
"
http://eutils.ncbi.nlm.nih.gov/entrez/eutils/einfo....
> @proxy_addr = "proxy" # this is my local proxy
> @proxy_port = 80
> @proxy = Net::HTTP::Proxy(@proxy_address, @proxy_port)
^^^^^^^^^^^^^^
Surely you meant @proxy_addr ?...
> end
>
> def query(base, cgi_args)
> uri = URI.parse(base)
> cgi_arg_list = cgi_args.collect { |h,v| h + "=" + CGI.escape(v) }
> uri.query = cgi_arg_list.join("&")
>
> puts "Fetching .... " + uri.to_s
> @proxy.start(uri.host, uri.port) { |http|
of these lines:
> resp = @proxy.get(uri.path + "?" + uri.query)
> puts resp.class
> resp = http.get(uri)
you dont need this line - you should only use the http object.
resp = http.get(uri.path + "?" + uri.query)
puts resp.class
HTH,
Assaph
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