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Strange error when using varbit

From: Maciej Jaźwiński <maciejjazwinski(at)interia(dot)pl>
To: <pgsql-jdbc(at)postgresql(dot)org>
Subject: Strange error when using varbit
Date: 2005-08-20 05:56:39
Message-ID: 001401c5a54b$efe43d90$6302040a@javaone (view raw or flat)
Thread:
Lists: pgsql-jdbc
Hi !

I have a problem with varbit and blobs. I need to upload binary files to my database, and yesterday I've got  it working.... for an hour or two. Files were uploaded,  but image (which I tried to download then was corrupted). But the worst came later, postgres started to throw exceptions at me :( Help, this is part of my diploma, and i really need to get it working..

I'm using:

JDeveloper 10g
PostgreSQL 8
JDBC drivers:
    - postgresql-8.0-310.jdbc3
    - postgresql-8.1dev-401.jdbc3
Commons File Upload
OS: Windows XP
Java: 1.4.2
Tomcat 5.0

Connection are pooled (org.postgresql.ds.PGPoolingDataSource), looked up using JNDI.

Stack trace :
1 <----- this is generated pk
5 <----- foreign key
04_LAB_instrukcja.pdf <-----  filename
application/pdf <------ mime type
768164 <------- file size

And the exception itself ;)

org.postgresql.util.PSQLException: ERROR: "%" is not a valid binary digit

 at org.postgresql.util.PSQLException.parseServerError(PSQLException.java:139)
 at org.postgresql.core.QueryExecutor.executeV3(QueryExecutor.java:152)
 at org.postgresql.core.QueryExecutor.execute(QueryExecutor.java:100)
 at org.postgresql.core.QueryExecutor.execute(QueryExecutor.java:43)
 at org.postgresql.jdbc1.AbstractJdbc1Statement.execute(AbstractJdbc1Statement.java:517)
 at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:50)
 at org.postgresql.jdbc1.AbstractJdbc1Statement.executeUpdate(AbstractJdbc1Statement.java:273)
 at org.apache.commons.dbcp.DelegatingPreparedStatement.executeUpdate(DelegatingPreparedStatement.java:101)
 at pl.edu.pw.mchtr.model.RequirementDAO.saveBinary(RequirementDAO.java:1074)
 at pl.edu.pw.mchtr.model.Requirement.saveBinary(Requirement.java:262)
 at pl.edu.pw.mchtr.controller.Upload.doPost(Upload.java:84)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
 at pl.edu.pw.mchtr.controller.filters.Watchdog.doFilter(Watchdog.java:59)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:186)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
 at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
 at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
 at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
 at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
 at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
 at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
 at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462)
 at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
 at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
 at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
 at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
 at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
 at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
 at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
 at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
 at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
 at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
 at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
 at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
 at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
 at java.lang.Thread.run(Thread.java:595)


Upload code:

  public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
  {
    boolean isMultipart = FileUpload.isMultipartContent(request);
    
    if (isMultipart)
    {
      DiskFileUpload upload = new DiskFileUpload();

      // Set upload parameters
      upload.setSizeMax(5242880);
//      upload.setRepositoryPath(tempDir);
      
      String projectsId = "", requirementsId = "";
      // Parse the request
      try
      {
        List items = upload.parseRequest(request);
        BinaryHelperBean bean = new BinaryHelperBean();
        if (!items.isEmpty())
        {
          Iterator it = items.iterator();
          while (it.hasNext())
          {
            FileItem item = (FileItem)it.next();
            if (item.isFormField())
            {
              String paramName = item.getFieldName();
              String fieldValue = item.getString();
              if (paramName.equalsIgnoreCase("projectsId"))
                projectsId = item.getString("UTF-8");
              else
                requirementsId = item.getString("UTF-8");
            }
            else
            {
              String fileName = item.getName();
              String contentType = item.getContentType();
              bean.setFilename(fileName);
              bean.setContentType(contentType);
              InputStream stream = item.getInputStream();
              int sizeInBytes = (int)item.getSize();
              bean.setFileSize(sizeInBytes);
              byte[] buffer = new byte[sizeInBytes];
              
              ByteArrayOutputStream bostream = new ByteArrayOutputStream();
              byte[] chunk = new byte[128];
              int real;
              while((real = stream.read(chunk)) != -1)
                bostream.write(chunk, 0, real);
              bean.setOutputStream(bostream);
              stream.close();
            }
          }
          System.out.println("Projects id w upload: " + projectsId);
          System.out.println("Requirements id w upload: " + requirementsId);
          bean.setProjectsId(projectsId);
          bean.setRequirementsId(requirementsId);
          Requirement req = new Requirement();
          req.saveBinary(bean);
        }
      }

DAO code that writes bytes to postgres:

  public void saveBinary(BinaryHelperBean bean) throws DAOException
  {
    Sequencer seq = Sequencer.getInstance();
    Long id = seq.getNextKey("RESOURCES");
    String update = "insert into resources (resources_id, projects_id, requirements_id, " +
    "filename, content_type, filesize, file) values (?, ?, ?, ?, ?, ?, ?)";
    PreparedStatement pstat = null;
    try
    {
      getConnection();
      conn.setAutoCommit(false);
      pstat = conn.prepareStatement(update);
      pstat.setLong(1, id.longValue());
      System.out.println(id.longValue() + "");
      pstat.setLong(2, bean.getProjectsIdLong().longValue());
      System.out.println(bean.getProjectsIdLong().toString());
      if (bean.getRequirementsIdLong() != null)
        pstat.setLong(3, bean.getRequirementsIdLong().longValue());
      else
        pstat.setObject(3, bean.getRequirementsIdLong());
      pstat.setString(4, bean.getFilename());
      System.out.println(bean.getFilename());
      pstat.setString(5, bean.getContentType());
      System.out.println(bean.getContentType());
      pstat.setInt(6, bean.getFileSize());
      pstat.setBinaryStream(7, bean.getInputStream(), bean.getFileSize());
      System.out.println(bean.getFileSize() + "");
      pstat.executeUpdate();
      conn.commit();
    }
    catch (SQLException e)
    {
      try
      {
        conn.rollback();
      }
      catch (Exception ex)
      {
        ex.printStackTrace();
      }
      handleException(e, "Wyjątek przy zapisie pliku binarnego.");
    }
    catch (NamingException e)
    {
      try
      {
        conn.rollback();
      }
      catch (Exception ex)
      {
        ex.printStackTrace();
      }
      handleException(e, "Wyjątek przy zapisie pliku binarnego.");
    }
    finally
    {
      try
      {
        if (pstat != null)  
          pstat.close();
        closeConnection();
      }
      catch (Exception e)
      {
        e.printStackTrace();
      }
    }
  }

and finally (don't know if it's important) - upload jsp:

<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean"%>
<%@ taglib uri="http://java.sun.com/jstl/core" prefix="c"%>
<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html"%>
<%@ page contentType="text/html;charset=utf-8"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title><bean:message key="binary.upload" /></title>
<link rel="stylesheet" type="text/css" href="css/main.css" charset="utf-8" />
<script language="javascript" charset="utf-8" src="CustomValidation.js" type="text/javascript">
</script>
</head>
<body>
<form enctype="multipart/form-data" action="/RMS/upload" method="post">
  <P>
    <%
    /*c:out didn't give any output here, i had to use scriplet ;)*/
      out.print("<input type=\"hidden\" value=\"");
      out.print(request.getParameter("projectsId"));
      out.print("\" name=\"projectsId\"/>");
      out.print("<input type=\"hidden\" value=\"");
      out.print(request.getParameter("requirementsId"));
      out.print("\" name=\"requirementsId\"/>");
    %>
  </P>
  <table align="center" cellspacing="3" cellpadding="3" border="0">
    <tr>
      <td align="center"><bean:message key="binary.upload" /></td>
    </tr>
    <tr>
      <td><input type="file" name="filename"/></td>
    </tr>
    <tr>
      <td>
        <html:submit>
          <bean:message key="binary.uploadSubmit" />
        </html:submit>
      </td>
    </tr>
  </table>
  </form>
</body>
</html>


Once again, please help, I really don't know what is wrong.

Maciek

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