String picurl = setting.getNodeText("/config/servers/get-pic-code");
if(picurl==null) picurl = FetionConfig.getString("server.verify-pic-uri");
picurl +="?algorithm="+alg;
URL url = new URL(picurl);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.addRequestProperty("User-Agent", "IIC2.0/PC "+FetionClient.PROTOCOL_VERSION); //必须要加这个,否则失败 很奇怪
if(conn.getResponseCode()==HttpURLConnection.HTTP_OK) {
Element e = XMLHelper.build(conn.getInputStream());
Element pic = XMLHelper.find(e, "/results/pic-certificate");
String pid = pic.getAttributeValue("id");
String code = pic.getAttributeValue("pic");