#19

backend/app/controllers/wiki_proxy_controller.rb

@@ -0,0 +1,31 @@
+require 'net/http'
+require 'uri'
+
+
+class WikiProxyController < ApplicationController
+  def edit
+    tag = params[:tag]
+    uri = "http://localhost:4567/gollum/edit/#{ URI.encode_www_form_component(tag) }"
+    begin
+      res = fetch_with_redirect(uri)
+      render html: res.body.html_safe, content_type: res.content_type
+    rescue => e
+      render plain: "Wiki システムとの通信に失敗しました：#{ e.message }", status: 502
+    end
+  end
+
+  private
+
+  def fetch_with_redirect uri_str, limit = 5
+    raise 'Too many redirects' if limit == 0
+
+    uri = URI.parse(uri_str)
+    res = Net::HTTP.get_response(uri)
+    if res.is_a? Net::HTTPRedirection
+      location = res['location']
+      fetch_with_redirect(location, limit - 1)
+    else
+      res
+    end
+  end
+end