Parametrized get request in Ruby?

问题:

How do I make an HTTP GET request with parameters in Ruby?

It's easy to do when you're POSTing:

  require 'net/http'
  require 'uri'

  HTTP.post_form URI.parse('http://www.example.com/search.cgi'),
                 { "q" => "ruby", "max" => "50" }

But I see no way of passing GET parameters as a hash using 'net/http'.

回答1:

Use the following method:

require 'net/http'
require 'cgi'

def http_get(domain,path,params)
    return Net::HTTP.get(domain, "#{path}?".concat(params.collect { |k,v| "#{k}=#{CGI::escape(v.to_s)}" }.join('&'))) if not params.nil?
    return Net::HTTP.get(domain, path)
end

params = {:q => "ruby", :max => 50}
print http_get("www.example.com", "/search.cgi", params)

回答2:

Since version 1.9.2 (I think) you can actually pass the parameters as a hash to the URI::encode_www_form method like this:

require 'uri'

uri = URI.parse('http://www.example.com/search.cgi')
params = { :q => "ruby", :max => "50" }

# Add params to URI
uri.query = URI.encode_www_form( params )

and then fetch the result, depending on your preference

require 'open-uri'

puts uri.open.read

or

require 'net/http'

puts Net::HTTP.get(uri)

回答3:

require 'net/http' require 'uri'

uri = URI.parse( "http://www.google.de/search" ); params = {'q'=>'cheese'}

http = Net::HTTP.new(uri.host, uri.port) 
request = Net::HTTP::Get.new(uri.path) 
request.set_form_data( params )

# instantiate a new Request object
request = Net::HTTP::Get.new( uri.path+ '?' + request.body ) 

response = http.request(request)
puts response.body

I would expect it to work without the second instantiation as it would be the first request-objects or the http-object's job but it worked for me this way.

回答4:

Net::HTTP.get_print 'localhost', '/cgi-bin/badstore.cgi?searchquery=crystal&action=search&x=11&y=15'

or

uri = URI.parse("http://localhost")
req = Net::HTTP::Get.new("/cgi-bin/badstore.cgi?searchquery=crystal&action=search&x=11&y=15")

http = Net::HTTP.new(uri.host, uri.port)

response = http.start do |http| 
  http.request(req)
end

回答5:

Use Excon:

conn = Excon.new('http://www.example.com/search.cgi')
conn.get(:query => { "q" => "ruby", "max" => "50" })

回答6:

new to stack overflow and I guess I can't comment, but @chris.moose is missing double quotes in his function def. line 5 should be:

return Net::HTTP.get(domain, "#{path}?".concat(params.collect { |k,v| "#{k}=#{CGI::escape(v.to_s)}" }.reverse.join('&'))) if not params.nil?

or here's the whole thing redefined for copy/pasting

require 'net/http'
require 'cgi'

def http_get(domain,path,params)
    return Net::HTTP.get(domain, "#{path}?".concat(params.collect { |k,v| "#{k}=#{CGI::escape(v.to_s)}" }.reverse.join('&'))) if not params.nil?
    return Net::HTTP.get(domain, path)
end

<3 -mike

回答7:

This is the easiest way to do it

 require 'net/http' require 'uri'
 @siteurl = "http://www.google.de/search/#{@yourquery}"
define your query
 @yourquery = "whatever"



uri = URI.parse( "@siteurl" );
http = Net::HTTP.new(uri.host, uri.port) 
request = Net::HTTP::Get.new(uri.path) 

# instantiate a new Request object
request = Net::HTTP::Get.new( uri.path+ '?' + request.body ) 

response = http.request(request)
puts response.body

Might not be perfect but at least you get the idea.