title: Google Cloud Endpoints : Not able to open http://localhost:8080/_ah/api/explorer behind a proxy network
body: <p>When i am opening <code>http://localhost:8080/_ah/api/explorer</code> Eclipse is showing an error-
  ></p>
  
  <pre><code>com.google.apphosting.utils.jetty.JettyLogger warn
  [INFO] WARNING: /_ah/api/static/proxy.html: java.io.IOException: Could not fetch URL: https://webapis-discovery.appspot.com/_ah/api/static/proxy.html, error: Received exception executing http method GET against URL https://webapis-discovery.appspot.com/_ah/api/static/proxy.html: Connection to https://webapis-discovery.appspot.com refused
  </code></pre>
  
  <p>Few lines above Eclipse shows an SEVERE error-
  ></p>
  
  <pre><code>[INFO] SEVERE: javax.servlet.ServletContext log: unavailable
  [INFO] java.io.IOException: Could not fetch URL: https://webapis-discovery.appspot.com/_ah/api/static/proxy.html, error: Received exception executing http method GET against URL https://webapis-discovery.appspot.com/_ah/api/static/proxy.html: Connection to https://webapis-discovery.appspot.com refused
  [INFO]  at com.google.appengine.api.urlfetch.URLFetchServiceImpl.convertApplicationException(URLFetchServiceImpl.java:138)
  [INFO]  at com.google.appengine.api.urlfetch.URLFetchServiceImpl.fetch(URLFetchServiceImpl.java:45)
  [INFO]  at com.google.apphosting.utils.security.urlfetch.URLFetchServiceStreamHandler$Connection.fetchResponse(URLFetchServiceStreamHandler.java:417)
  [INFO]  at com.google.apphosting.utils.security.urlfetch.URLFetchServiceStreamHandler$Connection.getInputStream(URLFetchServiceStreamHandler.java:296)
  [INFO]  at com.google.apphosting.utils.security.urlfetch.URLFetchServiceStreamHandler$Connection.getResponseCode(URLFetchServiceStreamHandler.java:149)
  [INFO]  at com.google.appengine.repackaged.com.google.api.client.http.javanet.NetHttpResponse.&lt;init&gt;(NetHttpResponse.java:36)
  [INFO]  at com.google.appengine.repackaged.com.google.api.client.http.javanet.NetHttpRequest.execute(NetHttpRequest.java:94)
  [INFO]  at com.google.appengine.repackaged.com.google.api.client.http.HttpRequest.execute(HttpRequest.java:965)
  [INFO]  at com.google.api.server.spi.tools.devserver.StaticServlet.getStaticContent(StaticServlet.java:58)
  [INFO]  at com.google.api.server.spi.tools.devserver.StaticServlet.cacheContent(StaticServlet.java:50)
  [INFO]  at com.google.api.server.spi.tools.devserver.StaticServlet.init(StaticServlet.java:43)
  [INFO]  at javax.servlet.GenericServlet.init(GenericServlet.java:212)
  [INFO]  at org.mortbay.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:440)
  [INFO]  at org.mortbay.jetty.servlet.ServletHolder.getServlet(ServletHolder.java:339)
  [INFO]  at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
  [INFO]  at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
  [INFO]  at com.google.appengine.api.socket.dev.DevSocketFilter.doFilter(DevSocketFilter.java:74)
  [INFO]  at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
  [INFO]  at com.google.appengine.tools.development.ResponseRewriterFilter.doFilter(ResponseRewriterFilter.java:127)
  [INFO]  at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
  [INFO]  at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:34)
  [INFO]  at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
  [INFO]  at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:63)
  [INFO]  at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
  [INFO]  at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
  [INFO]  at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
  [INFO]  at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:125)
  [INFO]  at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
  [INFO]  at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectRequest(DevAppServerModulesFilter.java:366)
  [INFO]  at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectModuleRequest(DevAppServerModulesFilter.java:349)
  [INFO]  at com.google.appengine.tools.development.DevAppServerModulesFilter.doFilter(DevAppServerModulesFilter.java:116)
  [INFO]  at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
  [INFO]  at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
  [INFO]  at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
  [INFO]  at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
  [INFO]  at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
  [INFO]  at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
  [INFO]  at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:98)
  [INFO]  at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
  [INFO]  at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:491)
  [INFO]  at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
  [INFO]  at org.mortbay.jetty.Server.handle(Server.java:326)
  [INFO]  at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
  [INFO]  at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
  [INFO]  at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547)
  [INFO]  at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
  [INFO]  at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
  [INFO]  at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
  [INFO]  at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
  </code></pre>
  
  <p>My college has a proxy server, i have already changed the system wide proxy settings and eclipse proxy settings in Window->Preferences->General->Network Connections .
  Everything else in Ubuntu works fine except this. Internet is working inside Eclipse too.</p>
  
  <p>Screenshot showing eclipse Network settings - </p>
  
  <p><a href="http://i1282.photobucket.com/albums/a540/saurabh595/Screenshotfrom2014-08-16_zps35144efe.png">http://i1282.photobucket.com/albums/a540/saurabh595/Screenshotfrom2014-08-16_zps35144efe.png</a></p>
  
  <p>When i try using my mobile internet connection(without proxy server) it works sometimes and shows same error otherwise.</p>
  
  <p>I've been trying to solve this by doing many Google Searches and trying many things out, but I just cannot seem to be able to proceed any further. I would very much appreciate any help I can get from this community of professionals.</p>
  
  <p>Thanks</p>