Merge branch 'master' of github.com:BillyRuffian/roda-proxy

README.md

@@ -58,7 +58,7 @@ route do |r|
 end
 ```
 
-The proxy will always be invoked. Headers and body are passed through unmodified in both directions with the exception of `Host` which is rewritten to match the target.
+The proxy will always be invoked. Headers and body are passed through unmodified in both directions with the exception of `Host` which is rewritten to match the target and `Via` which is created (or appended to if it already exists) to indicate the proxy path.
 
 Also provided is a conditional proxy:
 
@@ -82,7 +82,7 @@ route do |r|
 end
 ```
 
-With `proxy_when` the first optional parameter expects a truthy value or a block / lambda that returns a truthy value. This must be equivalent to `true` for the proxying to occur. The optional probability is a float between 0 and 1 indicating the probability that proxying will happen. Both paramters can be used alone or in isolation.
+With `proxy_when` the first optional parameter expects a truthy value or a block / lambda that returns a truthy value. This must be equivalent to `true` for the proxying to occur. The optional probability is a float between 0 and 1 indicating the probability that proxying will happen. Both parameters can be used alone or in isolation.
 
 If and only if proxying does not occur will the block be evaluated and return to Roda for rendering.
 

lib/roda/proxy.rb

@@ -13,13 +13,17 @@ class Roda
       # Respond to the configure method to set the destination when proxying
       # Expects the following options:
       # [to] Required. The scheme and host of the proxy. Should not end with a slash.
-      # [path] Optional. The path to append to the above for proxying.
-      #        Should begin with a +/+. Defaults to +/+.
+      # [path_prefix] Optional. The path to append to the above for proxying.
+      #        The current request path will be prefixed on to this value.
+      #        Should begin and end with a +/+. Defaults to +/+.
+      #        For example, if the path prefix is +/foo/+ and the request received
+      #        by Roda is +GET /postcode/lookup+, The proxied request will be dispatched
+      #        to +GET /home/postcode/lookup+
       # Example:
       #   plugin :proxy, to: 'https://foo.bar', path: '/my/api'
       def self.configure(app, opts = {})
         app.opts[:proxy_to] = opts.fetch(:to, nil) 
-        app.opts[:proxy_path] = opts.fetch(:path, '/')
+        app.opts[:proxy_path] = opts.fetch(:path_prefix, '/')
         
         raise 'Proxy host not set, use "plugin :proxy, to: http://example.com"' unless app.opts[:proxy_to]
       end
@@ -33,6 +37,7 @@ class Roda
         def proxy
           method = Faraday.method(env['REQUEST_METHOD'].downcase.to_sym)
           f_response = method.call(_proxy_url) { |req| _proxy_request(req) }
+#           p f_response
           _respond(f_response)
         end
         
@@ -50,17 +55,19 @@ class Roda
           shall_proxy = Random.rand(0.0..1.0) <= probability
                     
           if shall_proxy && ( condition.respond_to?(:call) ? condition.call : condition )
-            yield(self)
-          else
             proxy
+          else
+            yield(self)
           end
         end
         
         private
         
+        
         def _proxy_url
           @_proxy_url ||= URI(roda_class.opts[:proxy_to])
-                          .then { |uri| uri.path = roda_class.opts[:proxy_path]; uri }
+                          .then { |uri| uri.path = roda_class.opts[:proxy_path]; uri } # prefix
+                          .then { |uri| uri.path += env['PATH_INFO'][1..-1]; uri } # path
                           .then { |uri| uri.query = env['QUERY_STRING']; uri }
         end
         
@@ -73,7 +80,11 @@ class Roda
                .split('_')
                .map(&:capitalize)
                .join('-')
-            end.merge({ 'Host' => "#{_proxy_url.host}:#{_proxy_url.port}" })
+            end
+            .merge({ 
+                     'Host' => "#{_proxy_url.host}:#{_proxy_url.port}",
+                     'Via' => _via_header_string
+                   })
         end
         
         def _proxy_request(req)
@@ -82,9 +93,17 @@ class Roda
         
         def _respond(proxied_response)
           response.status = proxied_response.status
-          proxied_response.headers.each { |k, v| response[k] = v }
+          proxied_response
+            .headers
+            .reject { |k, v| k.downcase == 'transfer-encoding' } 
+            .each { |k, v| response[k] = v }
+          response['Via'] = _via_header_string
           response.write(proxied_response.body)
         end
+        
+        def _via_header_string
+          "#{env['SERVER_PROTOCOL']} #{env['SERVER_NAME']}:#{env['SERVER_PORT']}"
+        end
       end
     end
     

lib/roda/proxy/version.rb

@@ -2,6 +2,6 @@
 
 class Roda
   module Proxy
-    VERSION = '0.1.0'
+    VERSION = '1.0.5'
   end
 end

roda-proxy.gemspec

@@ -8,17 +8,17 @@ Gem::Specification.new do |spec|
   spec.authors       = ['Nigel Brookes-Thomas']
   spec.email         = ['nigel@brookes-thomas.co.uk']
 
-  spec.summary       = 'Proxy service for Roda'
-  spec.description   = 'Roda proxy service'
-  spec.homepage      = 'http://foo.bar'
+  spec.summary       = 'Reverse proxy plugin for Roda'
+  spec.description   = 'A very simple reverse proxy for Roda'
+  spec.homepage      = 'https://github.com/BillyRuffian/roda-proxy'
   spec.license       = 'MIT'
   spec.required_ruby_version = Gem::Requirement.new('>= 2.3.0')
 
-  spec.metadata['allowed_push_host'] = "TODO: Set to 'http://mygemserver.com'"
+  spec.metadata['allowed_push_host'] = 'https://rubygems.org'
 
   spec.metadata['homepage_uri'] = spec.homepage
-  spec.metadata['source_code_uri'] = 'http://foo.bar'
-  spec.metadata['changelog_uri'] = 'http://foo.bar'
+  spec.metadata['source_code_uri'] = 'https://github.com/BillyRuffian/roda-proxy'
+  spec.metadata['changelog_uri'] = 'https://github.com/BillyRuffian/roda-proxy'
 
   # Specify which files should be added to the gem when it is released.
   # The `git ls-files -z` loads the files in the RubyGem that have been added into git.