Create a separate webfinger service.

.gitignore

@@ -19,6 +19,7 @@ public/stylesheets/sessions.css
 public/stylesheets/ui.css
 public/stylesheets/mobile.css
 public/diaspora
+public/well-known/host-meta
 spec/fixtures/users.yaml
 
 # Uploded files and local files

config.ru

@@ -5,8 +5,13 @@
 # This file is used by Rack-based servers to start the application.
 
 require ::File.expand_path('../config/environment',  __FILE__)
-#use Rack::FiberPool
 require ::File.expand_path('../lib/chrome_frame', __FILE__)
+require 'lib/host-meta'
+#use Rack::FiberPool
+
+map "/.well-known" do
+  run HostMeta::File.new( "public/well-known")
+end
 
 map AppConfig[:pod_uri].path  do
   use Rack::ChromeFrame, :minimum => 8

lib/host-meta.rb

@@ -0,0 +1,83 @@
+require 'time'
+require 'rack/utils'
+require 'rack/mime'
+
+module HostMeta
+
+  #
+  # Serve just a 'host-meta' request from a static file.
+  #
+  class File
+    attr_accessor :root
+    attr_accessor :path
+
+    alias :to_path :path
+
+    def initialize(root)
+      @root = root
+    end
+
+    def call(env)
+      dup._call(env)
+    end
+
+    F = ::File
+
+    def _call(env)
+      @path_info = Rack::Utils.unescape(env["PATH_INFO"])
+      @path = F.join(@root, @path_info)
+
+      available = begin
+        @path_info == "/host-meta" && F.file?(@path) && F.readable?(@path)
+      rescue SystemCallError
+        false
+      end
+
+      if available
+        serving(env)
+      else
+        fail(404, "File not found: #{@path_info}")
+      end
+    end
+
+    def serving(env)
+      # NOTE:
+      #   We check via File::size? whether this file provides size info
+      #   via stat (e.g. /proc files often don't), otherwise we have to
+      #   figure it out by reading the whole file into memory.
+      @size = F.size?(@path) || Rack::Utils.bytesize(F.read(@path))
+      response = [
+        200,
+        {
+          "Last-Modified"  => F.mtime(@path).httpdate,
+          "Content-Type"   => 'application/xml+xrd; charset=utf-8'
+        },
+        self
+      ]
+      response[1]["Content-Length"] = @size.to_s
+      response
+    end
+
+    def each
+      F.open(@path) do |file|
+        yield file.read( @size)
+      end
+    end
+
+    private
+
+    def fail(status, body)
+      body += "\n"
+      [
+        status,
+        {
+          "Content-Type" => "text/plain",
+          "Content-Length" => body.size.to_s,
+          "X-Cascade" => "pass"
+        },
+        [body]
+      ]
+    end
+
+  end
+end

script/server

@@ -136,6 +136,15 @@ if [ ! -e public/source.tar.gz ]; then
     exit 65
 fi
 
+# create static public/well-known/host-meta if required
+if [[ -w public  &&
+    (! -e public/well-known/host-meta ||
+          public/well-known/host-meta -ot config/app_config.yml) ]]
+then
+    bundle exec erb -r config/environment.rb app/views/publics/host_meta.erb \
+        2>/dev/null >public/well-known/host-meta
+fi
+
 # Precache jammit assets
 if [[ -w public  && ! -e 'public/stylesheets/application.css' ]]; then
     if [ "$INIT_PUBLIC" != 'no' ]; then