Add Request#base_uri

This allows you to set a base URI from a defaults block to apply to every request.

README.markdown

@@ -126,6 +126,23 @@ If you have Typhoeus settings you want to happen for every request, you can set
       # ...
     end
 
+If all of your requests share a common base URI, you can set that in your
+defaults block:
+
+    class GoogleJson < MonsterMash::Base
+      defaults do
+        base_uri "http://google.com"
+      end
+
+      get(:search) do
+        uri "/search" # expands to http://google.com/search
+      end
+
+      post(:authenticate) do
+        uri "https://auth.google.com" # ignores the base_uri
+      end
+    end
+
 As well, if you set `params` or `headers` in the `defaults` block, any `params` or `headers` added later will be `merge`d into the hash.
 
     class GoogleJson < MonsterMash::Base

lib/monster_mash/request.rb

@@ -61,9 +61,17 @@ def valid?
 
     def uri(value = nil)
       if value
-        @uri = value
+        @uri = base_uri ? URI.join(base_uri, value).to_s : value
       end
-      @uri
+
+      @uri || base_uri
+    end
+
+    def base_uri(value = nil)
+      if value
+        @base_uri = value
+      end
+      @base_uri
     end
 
     def handler(&block)

spec/monster_mash/request_spec.rb

@@ -113,6 +113,39 @@ class ApplyDefaultsB < ApplyDefaultsA
       @request.uri "http://google.com"
       @request.uri.should == "http://google.com"
     end
+
+    context "when a base uri is set" do
+      before do
+        @request.base_uri "http://google.com"
+      end
+
+      it "joins the two uris" do
+        @request.uri "/test"
+        @request.uri.should eq "http://google.com/test"
+      end
+
+      it "can be overridden" do
+        @request.uri "http://test.local"
+        @request.uri.should eq "http://test.local"
+      end
+
+      context "but no uri is specified" do
+        it "defaults to the base uri" do
+          @request.uri.should eq "http://google.com"
+        end
+      end
+    end
+  end
+
+  describe "#base_uri" do
+    before(:each) do
+      @request = MonsterMash::Request.new(:get)
+    end
+
+    it "should set the base uri, and return it" do
+      @request.base_uri "http://google.com"
+      @request.base_uri.should eq "http://google.com"
+    end
   end
 
   describe "method_missing methods" do