java.io.IOException : Server returned HTTP response code: 500 for URL

Question

我有以下代码来调用 URL:http://10.105.0.120/24online/servlet/ClientRegistrationResponse?action=response&phone=919638983856&actioncode=0000

代码:

StringBuffer request=new StringBuffer();
             request.append(xml);
             URL url = new URL(url);
             HttpURLConnection obj = null;   
                obj = (HttpURLConnection)url.openConnection();  //create a SSL connection object server-to-server

                ((URLConnection)obj).setDoInput(true);
                ((URLConnection)obj).setDoOutput(true);
                ((URLConnection)obj).setUseCaches(false);
//              ((URLConnection)obj).setReadTimeout(10);
                ((URLConnection)obj).setRequestProperty("Content-Type","application/x-www-form-urlencoded");
                obj.setRequestMethod("POST");
                obj.setRequestProperty("charset", "US-ASCII");
                //obj.setConnectTimeout(PropertyReader.IN_REQUEST_TIMEOUT);
                //obj.setReadTimeout(PropertyReader.IN_REQUEST_TIMEOUT);
                // Here the HTTPS request URL is created

                DataOutputStream dataoutputstream = new DataOutputStream(((URLConnection)obj).getOutputStream());
                dataoutputstream.writeBytes(request.toString());    //request
                //dataoutputstream.flush(); 
                dataoutputstream.close(); //connection closed
                BufferedReader bufferedreader = new BufferedReader(new InputStreamReader(((URLConnection)obj).getInputStream()));
                String res = "";

                                while ( (res = bufferedreader.readLine()) != null ) {

                    conresponse += res;
                }
                bufferedreader.close();

但我收到以下错误:

java.io.IOException: Server returned HTTP response code: 500 for URL: http://10.105.0.120/24online/servlet/ClientRegistrationResponse?action=response&phone=919638983856&actioncode=0000
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1313)
    at cyberoam.corporate.integration.XMLSenderReceiver.sendFileData1(XMLSenderReceiver.java:70)
    at cyberoam.corporate.modes.TopupRequestThread.sendTopupRequest(TopupRequestThread.java:56)
    at cyberoam.corporate.modes.TopupRequestThread.run(TopupRequestThread.java:31)
org.jdom.input.JDOMParseException: Error on line -1: Premature end of file.
    at org.jdom.input.SAXBuilder.build(SAXBuilder.java:504)
    at cyberoam.corporate.integration.XMLProcessor.parseXML(XMLProcessor.java:392)
    at cyberoam.corporate.modes.TopupRequestThread.sendTopupRequest(TopupRequestThread.java:62)
    at cyberoam.corporate.modes.TopupRequestThread.run(TopupRequestThread.java:31)
Caused by: org.xml.sax.SAXParseException: Premature end of file.
    at org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source)
    at org.apache.xerces.util.ErrorHandlerWrapper.fatalError(Unknown Source)
    at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
    at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
    at org.apache.xerces.impl.XMLVersionDetector.determineDocVersion(Unknown Source)
    at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
    at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
    at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
    at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
    at org.jdom.input.SAXBuilder.build(SAXBuilder.java:489)
    ... 3 more
Caused by: org.xml.sax.SAXParseException: Premature end of file.
    at org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source)
    at org.apache.xerces.util.ErrorHandlerWrapper.fatalError(Unknown Source)
    at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
    at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
    at org.apache.xerces.impl.XMLVersionDetector.determineDocVersion(Unknown Source)
    at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
    at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
    at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
    at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
    at org.jdom.input.SAXBuilder.build(SAXBuilder.java:489)
    at cyberoam.corporate.integration.XMLProcessor.parseXML(XMLProcessor.java:392)
    at cyberoam.corporate.modes.TopupRequestThread.sendTopupRequest(TopupRequestThread.java:62)
    at cyberoam.corporate.modes.TopupRequestThread.run(TopupRequestThread.java:31)
Caused by: org.xml.sax.SAXParseException: Premature end of file.
    at org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source)
    at org.apache.xerces.util.ErrorHandlerWrapper.fatalError(Unknown Source)
    at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
    at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
    at org.apache.xerces.impl.XMLVersionDetector.determineDocVersion(Unknown Source)
    at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
    at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
    at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
    at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
    at org.jdom.input.SAXBuilder.build(SAXBuilder.java:489)
    at cyberoam.corporate.integration.XMLProcessor.parseXML(XMLProcessor.java:392)
    at cyberoam.corporate.modes.TopupRequestThread.sendTopupRequest(TopupRequestThread.java:62)
    at cyberoam.corporate.modes.TopupRequestThread.run(TopupRequestThread.java:31)
2012-07-12 18:52:49,416 - PIPE_COMM: In Receiving Object for /usr/local/nas/pipes/raam_to_gui_pipe
******************SMPPThread constructor called*****************

这个错误的原因是什么？当我直接从浏览器调用 URL 时，效果非常好。

Answer 1

有问题吗？

您向服务器发送了错误的请求，并且服务器正在响应内部服务器错误(代码 500)。合乎逻辑的做法是检查您的 HTTP 服务器日志(它是一个 10.* IP 地址，因此它是您的本地地址)。

此外，JDOM 异常位于不同的线程或其他东西中......您显示的代码中没有与 JDOM 相关的代码，并且异常堆栈跟踪没有以任何方式链接到具有 500 状态响应的 IOException。或者，您忽略 status-500 响应 (IOException)，然后期望同一线程中的 JDOM 代码解析来自服务器的错误响应(可能为空)(这无疑会导致过早结束)文件)。

您需要:

• 检查您的服务器日志
• 适当处理所有异常
• 可以添加一些调试代码，以便您能够检查发送到服务器或从服务器检索的数据。