Examples of opendap.dap.http.HTTPMethod

opendap.dap.http.HTTPMethod

  }


  public static InputStream sendQuery(String remoteURI, String query) throws IOException {


    HTTPSession session = null;
    HTTPMethod method = null;
    HTTPMethodStream hmstream = null;
    InputStream stream = null;
    int statusCode = 0;


    StringBuilder sbuff = new StringBuilder(remoteURI);
    sbuff.append("?");
    sbuff.append(query);


    if (showRequest)
      System.out.println(" CdmRemote sendQuery=" + sbuff);


    try {


      try {
        session = new HTTPSession();
        method = session.newMethodGet(sbuff.toString());
        statusCode = method.execute();
      } catch (HTTPException he) {
        throw new IOException(he);
      }


      if (statusCode == 404)
        throw new FileNotFoundException(method.getPath() + " " + method.getStatusLine());


      if (statusCode >= 300)
        throw new IOException(method.getPath() + " " + method.getStatusLine());


      stream = method.getResponseBodyAsStream();
      hmstream = new HTTPMethodStream(session, method, stream);
      return hmstream;


    } catch (IOException ioe) {
      if (session != null) session.close();

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    long size = 4;
    fos.write(NcStream.MAGIC_START);


    // header
    HTTPMethod method = null;
    try {
      // get the header
      String url = remoteURI + "?req=header";
      method = httpClient.newMethodGet(url);
      if (showRequest) System.out.printf("CdmRemote request %s %n", url);
      int statusCode = method.execute();


      if (statusCode == 404)
        throw new FileNotFoundException(method.getURI() + " " + method.getStatusLine());


      if (statusCode >= 300)
        throw new IOException(method.getURI() + " " + method.getStatusLine());


      InputStream is = method.getResponseBodyAsStream();
      size += IO.copyB(is, fos, IO.default_socket_buffersize);


    } finally {
      if (method != null) method.close();
    }


    for (Variable v : getVariables()) {
      StringBuilder sbuff = new StringBuilder(remoteURI);
      sbuff.append("?var=");
      sbuff.append(URLEncoder.encode(v.getShortName(), "UTF-8"));


      if (showRequest)
        System.out.println(" CdmRemote data request for variable: " + v.getFullName() + " url=" + sbuff);


      try {
        method = httpClient.newMethodGet(sbuff.toString());
        int statusCode = method.execute();


        if (statusCode == 404)
          throw new FileNotFoundException(method.getPath() + " " + method.getStatusLine());


        if (statusCode >= 300)
          throw new IOException(method.getPath() + " " + method.getStatusLine());


        int wantSize = (int) (v.getSize());
        Header h = method.getResponseHeader("Content-Length");
        if (h != null) {
          String s = h.getValue();
          int readLen = Integer.parseInt(s);
          if (readLen != wantSize)
            throw new IOException("content-length= " + readLen + " not equal expected Size= " + wantSize);
        }


        InputStream is = method.getResponseBodyAsStream();
        size += IO.copyB(is, fos, IO.default_socket_buffersize);


      } finally {
        if (method != null) method.close();
      }
    }


    fos.flush();
    fos.close();

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    session = new HTTPSession();


    boolean needtest = true;


    HTTPMethod method = null;
    try {
      method = session.newMethodHead(url);


      doConnect(method);


      Header head = method.getResponseHeader("Accept-Ranges");
      if (head == null) {
        needtest = true; // header is optional - need more testing


      } else if (head.getValue().equalsIgnoreCase("bytes")) {
        needtest = false;


      } else if (head.getValue().equalsIgnoreCase("none")) {
        throw new IOException("Server does not support byte Ranges");
      }


      head = method.getResponseHeader("Content-Length");
      if (head == null) {
        throw new IOException("Server does not support Content-Length");
      }


      try {
        total_length = Long.parseLong(head.getValue());
      } catch (NumberFormatException e) {
        throw new IOException("Server has malformed Content-Length header");
      }


    } finally {
      if (method != null) method.close();
    }


    if (needtest && !rangeOk(url))
      throw new IOException("Server does not support byte Ranges");

View Full Code Here

      session = null;
    }
  }


  private boolean rangeOk(String url) {
    HTTPMethod method = null;
    try {
      method = session.newMethodGet(url);
      method.setFollowRedirects(true);
      method.setRequestHeader("Range", "bytes=" + 0 + "-" + 1);
      doConnect(method);


      int code = method.getStatusCode();
      if (code != 206)
        throw new IOException("Server does not support Range requests, code= " + code);


      // clear stream
      method.close();
      return true;


    } catch (IOException e) {
      return false;


    } finally {
      if (method != null) method.close();
    }
  }

View Full Code Here

    if (end >= total_length)
      end = total_length - 1;


    if (debug) System.out.println(" HTTPRandomAccessFile bytes=" + pos + "-" + end + ": ");


    HTTPMethod method = null;
    try {
      method = session.newMethodGet(url);
      method.setFollowRedirects(true);
      method.setRequestHeader("Range", "bytes=" + pos + "-" + end);
      doConnect(method);


      int code = method.getStatusCode();
      if (code != 206)
        throw new IOException("Server does not support Range requests, code= " + code);


      String s = method.getResponseHeader("Content-Length").getValue();
      if (s == null)
        throw new IOException("Server does not send Content-Length header");


      int readLen = Integer.parseInt(s);
      readLen = Math.min(len, readLen);


      InputStream is = method.getResponseAsStream();
      readLen = copy(is, buff, offset, readLen);
      return readLen;


    } finally {
      if (method != null) method.close();
    }
  }

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ucar.nc2.dataset.NetcdfDataset

ucar.nc2.stream.CdmRemote

ucar.nc2.util.net.HttpClientManager

ucar.unidata.io.http.HTTPRandomAccessFile

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