使用 webrick 作为代理服务器
官网：https://ruby-doc.org/stdlib-2.5.0/libdoc/webrick/rdoc/WEBrick/HTTPProxyServer.html
使用下面这段代码，就可以使用8000端口进行代理。
<span class="ruby-identifier">require</span> <span class="ruby-string">'webrick'</span> <span class="ruby-identifier">require</span> <span class="ruby-string">'webrick/httpproxy'</span> <span class="ruby-identifier">proxy</span> = <span class="ruby-constant">WEBrick</span><span class="ruby-operator">::</span><span class="ruby-constant">HTTPProxyServer</span>.<span class="ruby-identifier">new</span> <span class="ruby-value">Port:</span> <span class="ruby-value">8000</span> <span class="ruby-identifier">trap</span> <span class="ruby-string">'INT'</span> <span class="ruby-keyword">do</span> <span class="ruby-identifier">proxy</span>.<span class="ruby-identifier">shutdown</span> <span class="ruby-keyword">end</span> <span class="ruby-identifier">trap</span> <span class="ruby-string">'TERM'</span> <span class="ruby-keyword">do</span> <span class="ruby-identifier">proxy</span>.<span class="ruby-identifier">shutdown</span> <span class="ruby-keyword">end</span> <span class="ruby-identifier">proxy</span>.<span class="ruby-identifier">start</span>
在浏览器增加代理
配置端口，可以更换端口为8888等
然后，保存设置，使用这个代理，就可以使用
