HttpUrlConnection gerResponseCode, вызывающий исключение сброса соединения

Question

Когда я пытаюсь нажать con.getResponseCode(), я получаю исключение сброса соединения, но при попадании одного и того же URL-адреса в веб-браузере он возвращает ответ правильно, но из моего кода ответ не возвращается. Пожалуйста, помогите мне проверить это.

This is the code:- 

private HttpURLConnection con; 
private String directory; 

public MIMESender(String url_path,String provider,String user,String password) throws Exception { 
    super(); 
    // TODO Auto-generated constructor stub 
    URL url = new URL(url_path); 
    System.out.println("Url Path=====" + url_path); 
    con = (HttpURLConnection) url.openConnection(); 

    con.setRequestMethod("POST"); 

    con.setDoOutput(true); 

    con.setRequestProperty("X-XIAM-ContentProvider",provider); 
    con.setRequestProperty("X-XIAM-ContentUsername",user); 
    con.setRequestProperty("X-XIAM-ContentPassword",password); 
    //System.setProperty("http.keepAlive", "false"); 
    //System.out.println("Keep Alive=========" + System.getProperty("http.keepAlive")); 
} 

public void setContentType(String type) throws IOException 
{ 
    con.setRequestProperty("Content-Type",type); 
} 

public static MimeBodyPart createXMLPart(String xml) throws MessagingException 
{ 
    ByteArrayDataSource fileData = new ByteArrayDataSource(xml.getBytes(),"text/xml"); 
    DataHandler fileDataHandler = new DataHandler(fileData); 
    MimeBodyPart body = new MimeBodyPart(); 
    body.setDataHandler(fileDataHandler); 
    body.setHeader("Content-Type",fileData.getContentType()); 
    return body; 
} 

public static MimeBodyPart createBodyPart(String filename) throws MessagingException 
{ 
    File file = new File(filename); 
    return createBodyPart(file); 
} 

public static MimeBodyPart createBodyPart(File file) throws MessagingException 
{ 
    FileDataSource fileData = new FileDataSource(file); 
    DataHandler fileDataHandler = new DataHandler(fileData); 
    MimeBodyPart body = new MimeBodyPart(); 
    body.setDataHandler(fileDataHandler); 
    body.setHeader("Content-Type",fileData.getContentType()); 
    if(!fileData.getContentType().startsWith("text")) 
     body.setHeader("Content-Transfer-Encoding","base64"); 
    else body.setHeader("Content-Transfer-Encoding","7bit"); 
    body.setContentID(file.getName()); 
    body.setHeader("Content-Location",file.getName()); 
    body.setHeader("Content-Disposition","attachment; filename="+file.getName());  
    return body; 
} 

public static MimeBodyPart createBodyPart(String location,File file) throws MessagingException 
{ 
    FileDataSource fileData = new FileDataSource(file); 
    DataHandler fileDataHandler = new DataHandler(fileData); 
    MimeBodyPart body = new MimeBodyPart(); 
    body.setDataHandler(fileDataHandler); 
    body.setHeader("Content-Type",fileData.getContentType()); 
    if(!fileData.getContentType().startsWith("text")) 
     body.setHeader("Content-Transfer-Encoding","base64"); 
    body.setContentID(file.getName()); 
    body.setHeader("Content-Location",location); 
    body.setHeader("Content-Disposition","attachment; filename="+file.getName()); 
    return body; 
} 

public String sendItem(String xml,String location,String filename) throws MessagingException,IOException 
{ 

    String response = null; 
    MimeMultipart mime = new MimeMultipart(); 
    mime.setSubType("related");      
    String type = mime.getContentType(); 
    setContentType(type); 

    mime.addBodyPart(MIMESender.createXMLPart(xml)); 

    if(!filename.equals("")) 
    { 
     File file = new File(filename); 
     mime.addBodyPart(MIMESender.createBodyPart(location,file)); 
    } 
    response = submit(mime); 
    return response; 
} 

public String send(String xml,String location,String filename) throws MessagingException,IOException 
{ 
    String response = null; 
    response = send(xml,location,new File(filename)); 
    return response; 
} 

public String send(String xml,String location,File file) throws MessagingException,IOException 
{ 
    String response = null; 
    File[] files = new File[1]; 
    files[0] = file; 
    response = send(xml,location,files); 
    return response; 
} 

public String send(String xml,String location,File[] files) throws MessagingException,IOException 
{ 
    String response = null; 

    try 
    { 

    MimeMultipart mime = new MimeMultipart(); 
    mime.setSubType("related");   
    String type = mime.getContentType(); 
    setContentType(type); 

    mime.addBodyPart(MIMESender.createXMLPart(xml)); 

    MimeMultipart mime_mix = new MimeMultipart(); 
    mime_mix.setSubType("mixed"); 
    for(int i=0;i<files.length;i++) 
    { 
     System.out.println("files : " + files[i]); 
     mime_mix.addBodyPart(MIMESender.createBodyPart(files[i])); 
    } 

    MimeBodyPart body_mix = new MimeBodyPart(); 
    body_mix.setContent(mime_mix); 
    body_mix.setHeader("Content-Type",mime_mix.getContentType()); 
    body_mix.setHeader("Content-Location",location); 
    mime.addBodyPart(body_mix); 

    response = submit(mime); 
    } 
    catch(Exception e) 
    { 
     e.printStackTrace(); 
    } 
    return response; 
} 

public String send(String xml,String location,File[] files,String preloc,String preview) throws MessagingException,IOException 
{ 
    String response = null; 
    MimeMultipart mime = new MimeMultipart(); 
    mime.setSubType("related");   
    String type = mime.getContentType(); 
    setContentType(type); 

    mime.addBodyPart(MIMESender.createXMLPart(xml)); 

    if(location!=null) 
    { 
     System.out.println("Inside Location not equals to null"); 
     MimeMultipart mime_mix = new MimeMultipart(); 
     mime_mix.setSubType("mixed"); 
     for(int i=0;i<files.length;i++) 
     { 
      System.out.println(files[i].getAbsolutePath() + " - " + files[i].exists()); 
      mime_mix.addBodyPart(MIMESender.createBodyPart(files[i])); 
     } 

     MimeBodyPart body_mix = new MimeBodyPart(); 
     body_mix.setContent(mime_mix); 
     body_mix.setHeader("Content-Type",mime_mix.getContentType()); 
     body_mix.setHeader("Content-Location",location); 
     mime.addBodyPart(body_mix); 
    } 

    if(preloc!=null){ 
    File file = new File(preview); 
    mime.addBodyPart(MIMESender.createBodyPart(preloc,file)); 
    } 
    response = submit(mime); 
    return response; 
} 

public String submit(MimeMultipart mime) throws IOException, MessagingException 
{ 
    String response=null; 
    DataOutputStream dos = new DataOutputStream(con.getOutputStream()); 
    dos.writeBytes("\r\n\r\n"); 
    mime.writeTo(dos); 
    dos.flush(); 
    dos.close();   
    System.out.println("Connection : "+con); 
    String httpCode = String.valueOf(con.getResponseCode()); // I am getting exception here.. 
    String respMsg = con.getResponseMessage(); 
    response = "HTTP/1.1 "+httpCode+" "+respMsg+"\n"; 

    int length = con.getContentLength(); 
    byte[] cnt = new byte[length]; 
    DataInputStream in = new DataInputStream(con.getInputStream()); 
    in.readFully(cnt); 
    response = response + new String(cnt).replaceAll("&lt;","<").replace("&gt;",">") + "\n"; 

    con.disconnect(); 
    return response; 
} 

/** 
* @param args 
*/ 
public static void main(String[] args) { 
    // TODO Auto-generated method stub 

    try { 
     String url = args[0]; 
     MIMESender sender = new MIMESender(url,"CP001","CP001","CP001"); 
     File file = new File(args[1]); 
     FileInputStream in = new FileInputStream(file); 
     int len = (int)file.length(); 
     byte[] data = new byte[len]; 
     in.read(data); 

     int n = args.length - 3; 
     File[] files = new File[n]; 
     for(int i=0;i<n;i++) 
      files[i] = new File(args[3+i]); 
     String resp = sender.sendItem(new String(data),args[2],args[2]); 
     System.out.println(resp); 

    } catch(IOException io){io.printStackTrace(); 
    } catch(MessagingException msg){msg.printStackTrace();  
    } catch(Exception e){e.printStackTrace();} 
} 

public String getDirectory() { 
    return directory; 
} 

public void setDirectory(String directory) { 
    this.directory = directory; 
} 

Мой полный стек след: -

java.net.SocketException: Connection reset 
at java.net.SocketInputStream.read(Unknown Source) 
at java.io.BufferedInputStream.fill(Unknown Source) 
at java.io.BufferedInputStream.read1(Unknown Source) 
at java.io.BufferedInputStream.read(Unknown Source) 
at sun.net.www.http.HttpClient.parseHTTPHeader(Unknown Source) 
at sun.net.www.http.HttpClient.parseHTTP(Unknown Source) 
at sun.net.www.http.HttpClient.parseHTTP(Unknown Source) 
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source) 
at java.net.HttpURLConnection.getResponseCode(Unknown Source) 
at com.nokia.content.misc.MIMESender.submit(MIMESender.java:218) 
at com.nokia.content.misc.MIMESender.send(MIMESender.java:201) 
at com.nokia.content.CTUploader.sendSubItem(CTUploader.java:1202) 
at com.nokia.content.CTUploader.send(CTUploader.java:800) 
at com.nokia.content.CTUploader.send(CTUploader.java:502) 
at com.nokia.content.ui.CPA.doSubmission(CPA.java:727) 
at com.nokia.content.ui.CPA.submitMenuItemActionPerformed(CPA.java:571) 
at com.nokia.content.ui.CPA.access$16(CPA.java:563) 
at com.nokia.content.ui.CPA$9.actionPerformed(CPA.java:195) 
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source) 
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source) 
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source) 
at javax.swing.DefaultButtonModel.setPressed(Unknown Source) 
at javax.swing.AbstractButton.doClick(Unknown Source) 
at javax.swing.plaf.basic.BasicMenuItemUI.doClick(Unknown Source) 
at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(Unknown Source) 
at java.awt.Component.processMouseEvent(Unknown Source) 
at javax.swing.JComponent.processMouseEvent(Unknown Source) 
at java.awt.Component.processEvent(Unknown Source) 
at java.awt.Container.processEvent(Unknown Source) 
at java.awt.Component.dispatchEventImpl(Unknown Source) 
at java.awt.Container.dispatchEventImpl(Unknown Source) 
at java.awt.Component.dispatchEvent(Unknown Source) 
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source) 
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source) 
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source) 
at java.awt.Container.dispatchEventImpl(Unknown Source) 
at java.awt.Window.dispatchEventImpl(Unknown Source) 
at java.awt.Component.dispatchEvent(Unknown Source) 
at java.awt.EventQueue.dispatchEventImpl(Unknown Source) 
at java.awt.EventQueue.access$400(Unknown Source) 
at java.awt.EventQueue$2.run(Unknown Source) 
at java.awt.EventQueue$2.run(Unknown Source) 
at java.security.AccessController.doPrivileged(Native Method) 
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source) 
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source) 
at java.awt.EventQueue$3.run(Unknown Source) 
at java.awt.EventQueue$3.run(Unknown Source) 
at java.security.AccessController.doPrivileged(Native Method) 
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source) 
at java.awt.EventQueue.dispatchEvent(Unknown Source) 
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) 
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) 
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) 
at java.awt.EventDispatchThread.pumpEvents(Unknown Source) 
at java.awt.EventDispatchThread.pumpEvents(Unknown Source) 
at java.awt.EventDispatchThread.run(Unknown Source) 

Пожалуйста, помогите мне решить этот вопрос ребята .. Спасибо ..

Answer 1

Поскольку это крайне маловероятно, что кто-нибудь может определить проблема, основанная только на коде, я отвечаю на предложения о том, как действовать.

Учитывая, что он работает из браузера, но не из вашего кода, вероятно, проблема заключается в том, что ваш код не отправляет точно такую ​​же транзакцию, как браузер. Наиболее вероятным отличием будет отсутствующий или дополнительный HTTP-заголовок или разница в заголовке User-Agent, заставляющая сервер закрыть соединение.

Самый простой способ отладить это - использовать Wireshark для захвата сетевого трафика и определения того, что отличается между браузером и вашим кодом. Если вы обнаружите, что есть существенная разница и по-прежнему нужна помощь, отправьте другой вопрос, показывающий соответствующие различия.