Exemplo n.º 1
0
  public void printBrowserForm(PrintWriter pw, DAS das) {

    /*-----------------------------------------------------
    // C++ implementation looks like this...

    os << "<b>Sequence " << name() << "</b><br>\n";
    os << "<dl><dd>\n";

    for (Pix p = first_var(); p; next_var(p)) {
        var(p)->print_val(os, "", print_decls);
        wo.write_variable_attributes(var(p), global_das);
        os << "<p><p>\n";
    }

    os << "</dd></dl>\n";
    -----------------------------------------------------*/

    pw.print("<b>Sequence " + getName() + "</b><br>\n" + "<dl><dd>\n");

    wwwOutPut wOut = new wwwOutPut(pw);

    Enumeration e = getVariables();
    while (e.hasMoreElements()) {
      BaseType bt = (BaseType) e.nextElement();

      ((BrowserForm) bt).printBrowserForm(pw, das);

      wOut.writeVariableAttributes(bt, das);
      pw.print("<p><p>\n");
    }
    pw.println("</dd></dl>\n");
  }
Exemplo n.º 2
0
  public void doGetDDS(ReqState rs) throws Exception {
    HttpServletResponse response = rs.getResponse();

    GuardedDataset ds = null;
    try {
      ds = getDataset(rs);
      if (null == ds) return;

      response.setContentType("text/plain");
      response.setHeader("XDODS-Server", getServerVersion());
      response.setHeader("Content-Description", "dods-dds");

      OutputStream out = new BufferedOutputStream(response.getOutputStream());
      ServerDDS myDDS = ds.getDDS();

      if (rs.getConstraintExpression().equals("")) { // No Constraint Expression?
        // Send the whole DDS
        myDDS.print(out);
        out.flush();

      } else { // Otherwise, send the constrained DDS
        // Instantiate the CEEvaluator and parse the constraint expression
        CEEvaluator ce = new CEEvaluator(myDDS);
        ce.parseConstraint(rs);

        // Send the constrained DDS back to the client
        PrintWriter pw = new PrintWriter(new OutputStreamWriter(out));
        myDDS.printConstrained(pw);
        pw.flush();
      }

    } finally { // release lock if needed
      if (ds != null) ds.release();
    }
  }
Exemplo n.º 3
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  public void doGetHELP(ReqState rs) throws Exception {
    HttpServletResponse response = rs.getResponse();

    response.setContentType("text/html");
    response.setHeader("XDODS-Server", getServerVersion());
    response.setHeader("Content-Description", "dods-help");

    PrintWriter pw = new PrintWriter(new OutputStreamWriter(response.getOutputStream()));
    printHelpPage(pw);
    pw.flush();
  }
Exemplo n.º 4
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  public void doGetVER(ReqState rs) throws Exception {
    HttpServletResponse response = rs.getResponse();

    response.setContentType("text/plain");
    response.setHeader("XDODS-Server", getServerVersion());
    response.setHeader("Content-Description", "dods-version");

    PrintWriter pw = new PrintWriter(new OutputStreamWriter(response.getOutputStream()));

    pw.println("Server Version: " + getServerVersion());
    pw.flush();
  }
Exemplo n.º 5
0
  public void doGetDAP2Data(ReqState rs) throws Exception {
    HttpServletResponse response = rs.getResponse();

    GuardedDataset ds = null;
    try {
      ds = getDataset(rs);
      if (null == ds) return;

      response.setContentType("application/octet-stream");
      response.setHeader("XDODS-Server", getServerVersion());
      response.setHeader("Content-Description", "dods-data");

      ServletOutputStream sOut = response.getOutputStream();
      OutputStream bOut;
      DeflaterOutputStream dOut = null;
      if (rs.getAcceptsCompressed() && allowDeflate) {
        response.setHeader("Content-Encoding", "deflate");
        dOut = new DeflaterOutputStream(sOut);
        bOut = new BufferedOutputStream(dOut);

      } else {
        bOut = new BufferedOutputStream(sOut);
      }

      ServerDDS myDDS = ds.getDDS();
      CEEvaluator ce = new CEEvaluator(myDDS);
      ce.parseConstraint(rs);
      checkSize(myDDS, false);

      // Send the constrained DDS back to the client
      PrintWriter pw = new PrintWriter(new OutputStreamWriter(bOut));
      myDDS.printConstrained(pw);

      // Send the Data delimiter back to the client
      pw.flush();
      bOut.write("\nData:\n".getBytes());
      bOut.flush();

      // Send the binary data back to the client
      DataOutputStream sink = new DataOutputStream(bOut);
      ce.send(myDDS.getEncodedName(), sink, ds);
      sink.flush();

      // Finish up sending the compressed stuff, but don't
      // close the stream (who knows what the Servlet may expect!)
      if (null != dOut) dOut.finish();
      bOut.flush();

    } finally { // release lock if needed
      if (ds != null) ds.release();
    }
  }
Exemplo n.º 6
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  /**
   * ************************************************************************ Prints the Bad URL
   * Page page to the passed PrintWriter
   *
   * @param pw PrintWriter stream to which to dump the bad URL page.
   */
  private void printBadURLPage(PrintWriter pw) {

    String serverContactName = ThreddsConfig.get("serverInformation.contact.name", "UNKNOWN");
    String serverContactEmail = ThreddsConfig.get("serverInformation.contact.email", "UNKNOWN");
    pw.println("<h3>Error in URL</h3>");
    pw.println("The URL extension did not match any that are known by this");
    pw.println("server. Below is a list of the five extensions that are be recognized by");
    pw.println("all OPeNDAP servers. If you think that the server is broken (that the URL you");
    pw.println("submitted should have worked), then please contact the");
    pw.println("administrator of this server [" + serverContactName + "] at: ");
    pw.println("<a href='mailto:" + serverContactEmail + "'>" + serverContactEmail + "</a><p>");
  }
Exemplo n.º 7
0
  public void doGetASC(ReqState rs) throws Exception {
    HttpServletResponse response = rs.getResponse();

    GuardedDataset ds = null;
    try {
      ds = getDataset(rs);
      if (ds == null) return;

      response.setHeader("XDODS-Server", getServerVersion());
      response.setContentType("text/plain");
      response.setHeader("Content-Description", "dods-ascii");

      log.debug(
          "Sending OPeNDAP ASCII Data For: " + rs + "  CE: '" + rs.getConstraintExpression() + "'");

      ServerDDS dds = ds.getDDS();
      CEEvaluator ce = new CEEvaluator(dds);
      ce.parseConstraint(rs);
      checkSize(dds, true);

      PrintWriter pw = new PrintWriter(response.getOutputStream());
      dds.printConstrained(pw);
      pw.println("---------------------------------------------");

      AsciiWriter writer = new AsciiWriter(); // could be static
      writer.toASCII(pw, dds, ds);

      // the way that getDAP2Data works
      // DataOutputStream sink = new DataOutputStream(bOut);
      // ce.send(myDDS.getName(), sink, ds);

      pw.flush();

    } finally { // release lock if needed
      if (ds != null) ds.release();
    }
  }
Exemplo n.º 8
0
  private void sendErrorResponse(HttpServletResponse response, int errorCode, String errorMessage) {
    try {
      log.info(UsageLog.closingMessageForRequestContext(errorCode, -1));
      response.setStatus(errorCode);
      response.setHeader("Content-Description", "dods-error");
      response.setContentType("text/plain");

      PrintWriter pw = new PrintWriter(response.getOutputStream());
      pw.println("Error {");
      pw.println("    code = " + errorCode + ";");
      pw.println("    message = \"" + errorMessage + "\";");

      pw.println("};");
      pw.flush();
    } catch (Exception e) {
      System.err.println("sendErrorResponse: " + e);
    }
  }
Exemplo n.º 9
0
  /**
   * ************************************************************************ Prints the OPeNDAP
   * Server help page to the passed PrintWriter
   *
   * @param pw PrintWriter stream to which to dump the help page.
   */
  private void printHelpPage(PrintWriter pw) {

    pw.println("<h3>OPeNDAP Server Help</h3>");
    pw.println("To access most of the features of this OPeNDAP server, append");
    pw.println(
        "one of the following a eight suffixes to a URL: .das, .dds, .dods, .ddx, .blob, .info,");
    pw.println(".ver or .help. Using these suffixes, you can ask this server for:");
    pw.println("<dl>");
    pw.println("<dt> das  </dt> <dd> Dataset Attribute Structure (DAS)</dd>");
    pw.println("<dt> dds  </dt> <dd> Dataset Descriptor Structure (DDS)</dd>");
    pw.println("<dt> dods </dt> <dd> DataDDS object (A constrained DDS populated with data)</dd>");
    pw.println("<dt> ddx  </dt> <dd> XML version of the DDS/DAS</dd>");
    pw.println(
        "<dt> blob </dt> <dd> Serialized binary data content for requested data set, "
            + "with the constraint expression applied.</dd>");
    pw.println("<dt> info </dt> <dd> info object (attributes, types and other information)</dd>");
    pw.println("<dt> html </dt> <dd> html form for this dataset</dd>");
    pw.println("<dt> ver  </dt> <dd> return the version number of the server</dd>");
    pw.println("<dt> help </dt> <dd> help information (this text)</dd>");
    pw.println("</dl>");
    pw.println("For example, to request the DAS object from the FNOC1 dataset at URI/GSO (a");
    pw.println("test dataset) you would appand `.das' to the URL:");
    pw.println("http://opendap.gso.url.edu/cgi-bin/nph-nc/data/fnoc1.nc.das.");

    pw.println("<p><b>Note</b>: Many OPeNDAP clients supply these extensions for you so you don't");
    pw.println("need to append them (for example when using interfaces supplied by us or");
    pw.println("software re-linked with a OPeNDAP client-library). Generally, you only need to");
    pw.println("add these if you are typing a URL directly into a WWW browser.");
    pw.println("<p><b>Note</b>: If you would like version information for this server but");
    pw.println("don't know a specific data file or data set name, use `/version' for the");
    pw.println("filename. For example: http://opendap.gso.url.edu/cgi-bin/nph-nc/version will");
    pw.println("return the version number for the netCDF server used in the first example. ");

    pw.println("<p><b>Suggestion</b>: If you're typing this URL into a WWW browser and");
    pw.println("would like information about the dataset, use the `.info' extension.");

    pw.println("<p>If you'd like to see a data values, use the `.html' extension and submit a");
    pw.println("query using the customized form.");
  }
Exemplo n.º 10
0
  /**
   * ************************************************************************ Default handler for
   * OPeNDAP ascii requests. Returns OPeNDAP DAP2 data in comma delimited ascii columns for
   * ingestion into some not so OPeNDAP enabled application such as MS-Excel. Accepts constraint
   * expressions in exactly the same way as the regular OPeNDAP dataserver.
   *
   * @param request
   * @param response
   * @param dataSet
   * @throws opendap.dap.DAP2Exception
   * @throws ParseException
   */
  public void sendASCII(HttpServletRequest request, HttpServletResponse response, String dataSet)
      throws DAP2Exception, ParseException {

    if (Debug.isSet("showResponse"))
      System.out.println(
          "Sending OPeNDAP ASCII Data For: "
              + dataSet
              + "    CE: '"
              + request.getQueryString()
              + "'");

    String requestURL, ce;
    DConnect2 url;
    DataDDS dds;

    if (request.getQueryString() == null) {
      ce = "";
    } else {
      ce = "?" + request.getQueryString();
    }

    int suffixIndex = request.getRequestURL().toString().lastIndexOf(".");

    requestURL = request.getRequestURL().substring(0, suffixIndex);

    if (Debug.isSet("showResponse")) {
      System.out.println("New Request URL Resource: '" + requestURL + "'");
      System.out.println("New Request Constraint Expression: '" + ce + "'");
    }

    try {

      if (_Debug) System.out.println("Making connection to .dods service...");
      url = new DConnect2(requestURL, true);

      if (_Debug) System.out.println("Requesting data...");
      dds = url.getData(ce, null, new asciiFactory());

      if (_Debug) System.out.println(" ASC DDS: ");
      if (_Debug) dds.print(System.out);

      PrintWriter pw = new PrintWriter(response.getOutputStream());
      PrintWriter pwDebug = new PrintWriter(System.out);

      if (dds != null) {
        dds.print(pw);
        pw.println("---------------------------------------------");

        String s = "";
        Enumeration e = dds.getVariables();

        while (e.hasMoreElements()) {
          BaseType bt = (BaseType) e.nextElement();
          if (_Debug) ((toASCII) bt).toASCII(pwDebug, true, null, true);
          // bt.toASCII(pw,addName,getNAme(),true);
          ((toASCII) bt).toASCII(pw, true, null, true);
        }
      } else {

        String betterURL =
            request.getRequestURL().substring(0, request.getRequestURL().lastIndexOf("."))
                + ".dods?"
                + request.getQueryString();

        pw.println("-- ASCII RESPONSE HANDLER PROBLEM --");
        pw.println("");
        pw.println("The ASCII response handler was unable to obtain requested data set.");
        pw.println("");
        pw.println("Because this handler calls it's own OPeNDAP server to get the requested");
        pw.println("data the source error is obscured.");
        pw.println("");
        pw.println("To get a better idea of what is going wrong, try requesting the URL:");
        pw.println("");
        pw.println("    " + betterURL);
        pw.println("");
        pw.println("And then look carefully at the returned document. Note that if you");
        pw.println("are using a browser to access the URL the returned document will");
        pw.println("more than likely be treated as a download and written to your");
        pw.println("local disk. It should be a file with the extension \".dods\"");
        pw.println("");
        pw.println("Locate it, open it with a text editor, and find your");
        pw.println("way to happiness and inner peace.");
        pw.println("");
      }

      // pw.println("</pre>");
      pw.flush();
      if (_Debug) pwDebug.flush();

    } catch (FileNotFoundException fnfe) {
      System.out.println("OUCH! FileNotFoundException: " + fnfe.getMessage());
      fnfe.printStackTrace(System.out);
    } catch (MalformedURLException mue) {
      System.out.println("OUCH! MalformedURLException: " + mue.getMessage());
      mue.printStackTrace(System.out);
    } catch (IOException ioe) {
      System.out.println("OUCH! IOException: " + ioe.getMessage());
      ioe.printStackTrace(System.out);
    } catch (Throwable t) {
      System.out.println("OUCH! Throwable: " + t.getMessage());
      t.printStackTrace(System.out);
    }

    if (_Debug) System.out.println(" GetAsciiHandler done");
  }