Add keep-alive support

Gemfile.lock

@@ -0,0 +1,38 @@
+PATH
+  remote: .
+  specs:
+    rest-client (1.6.7)
+      mime-types (>= 1.16)
+      net-http-persistent
+      netrc (~> 0.7.7)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.3.3)
+    crack (0.3.2)
+    diff-lcs (1.2.1)
+    mime-types (1.21)
+    net-http-persistent (2.8)
+    netrc (0.7.7)
+    rake (10.0.3)
+    rspec (2.13.0)
+      rspec-core (~> 2.13.0)
+      rspec-expectations (~> 2.13.0)
+      rspec-mocks (~> 2.13.0)
+    rspec-core (2.13.1)
+    rspec-expectations (2.13.0)
+      diff-lcs (>= 1.1.3, < 2.0)
+    rspec-mocks (2.13.0)
+    webmock (1.11.0)
+      addressable (>= 2.2.7)
+      crack (>= 0.3.2)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  rake
+  rest-client!
+  rspec (>= 2.0)
+  webmock (>= 0.9.1)

lib/restclient.rb

@@ -1,6 +1,7 @@
 require 'uri'
 require 'zlib'
 require 'stringio'
+require 'net/http/persistent'
 
 begin
   require 'net/https'
@@ -93,7 +94,7 @@ def self.options(url, headers={}, &block)
   end
 
   class << self
-    attr_accessor :proxy
+    attr_accessor :proxy, :persistent
   end
 
   # Setup the log for RestClient calls.

lib/restclient/request.rb

@@ -98,6 +98,16 @@ def make_headers user_headers
       headers
     end
 
+    def open_connection(host, port)
+      if RestClient.persistent
+        proxy = nil
+        proxy = URI.parse(RestClient.proxy) if RestClient.proxy
+        Net::HTTP::Persistent.new('rest-client', proxy)
+      else
+        net_http_class.new(host, port)
+      end
+    end
+
     def net_http_class
       if RestClient.proxy
         proxy_uri = URI.parse(RestClient.proxy)
@@ -146,8 +156,8 @@ def process_payload(p=nil, parent_key=nil)
     def transmit uri, req, payload, & block
       setup_credentials req
 
-      net = net_http_class.new(uri.host, uri.port)
-      net.use_ssl = uri.is_a?(URI::HTTPS)
+      net = open_connection(uri.host, uri.port)
+      net.use_ssl = uri.is_a?(URI::HTTPS) if net.respond_to?(:use_ssl=)
       net.ssl_version = @ssl_version
       err_msg = nil
       if (@verify_ssl == false) || (@verify_ssl == OpenSSL::SSL::VERIFY_NONE)
@@ -178,13 +188,22 @@ def transmit uri, req, payload, & block
 
       log_request
 
-      net.start do |http|
+      if RestClient.persistent
+        req.body = payload.to_s if payload
         if @block_response
-          http.request(req, payload ? payload.to_s : nil, & @block_response)
+          net.request(uri, req)
         else
-          res = http.request(req, payload ? payload.to_s : nil) { |http_response| fetch_body(http_response) }
-          log_response res
-          process_result res, & block
+          net.request(uri, req) { |http_response| fetch_body(http_response) }
+        end
+      else
+        net.start do |http|
+          if @block_response
+            http.request(req, payload ? payload.to_s : nil, & @block_response)
+          else
+            res = http.request(req, payload ? payload.to_s : nil) { |http_response| fetch_body(http_response) }
+            log_response res
+            process_result res, & block
+          end
         end
       end
     rescue OpenSSL::SSL::SSLError => e

rest-client.gemspec

@@ -15,6 +15,7 @@ Gem::Specification.new do |s|
   s.summary = 'Simple HTTP and REST client for Ruby, inspired by microframework syntax for specifying actions.'
 
   s.add_runtime_dependency(%q<mime-types>, [">= 1.16"])
+  s.add_runtime_dependency(%q<net-http-persistent>)
   s.add_development_dependency(%q<webmock>, [">= 0.9.1"])
   s.add_development_dependency(%q<rspec>, [">= 2.0"])
   s.add_dependency(%q<netrc>, ["~> 0.7.7"])