Java Code Examples for java.net.httpurlconnection#setFixedLengthStreamingMode()

/**
 * Generates a web request to abort a copy operation.
 * 
 * @param uri
 *            A <code>java.net.URI</code> object that specifies the absolute URI.
 * @param blobOptions
 *            A {@link BlobRequestOptions} object that specifies execution options such as retry policy and timeout
 *            settings for the operation. Specify <code>null</code> to use the request options specified on the
 *            {@link CloudBlobClient}.
 * @param opContext
 *            An {@link OperationContext} object that represents the context for the current operation. This object
 *            is used to track requests to the storage service, and to provide additional runtime information about
 *            the operation.
 * @param accessCondition
 *            The access condition to apply to the request. Only lease conditions are supported for this operation.
 * @param copyId
 *            A <code>String</code> object that identifying the copy operation.
 * @return a HttpURLConnection configured for the operation.
 * @throws StorageException
 *             an exception representing any error which occurred during the operation.
 * @throws IllegalArgumentException
 * @throws IOException
 * @throws URISyntaxException
 */
public static HttpURLConnection abortCopy(final URI uri, final BlobRequestOptions blobOptions,
        final OperationContext opContext, final AccessCondition accessCondition, final String copyId)
        throws StorageException, IOException, URISyntaxException {

    final UriQueryBuilder builder = new UriQueryBuilder();

    builder.add(Constants.QueryConstants.COMPONENT, Constants.QueryConstants.COPY);
    builder.add(Constants.QueryConstants.COPY_ID, copyId);

    final HttpURLConnection request = BaseRequest.createURLConnection(uri, blobOptions, builder, opContext);

    request.setFixedLengthStreamingMode(0);
    request.setDoOutput(true);
    request.setRequestMethod(Constants.HTTP_PUT);

    request.setRequestProperty(Constants.HeaderConstants.COPY_ACTION_HEADER,
            Constants.HeaderConstants.COPY_ACTION_ABORT);

    if (accessCondition != null) {
        accessCondition.applyLeaseConditionToRequest(request);
    }

    return request;
}
 

/**
 * Send parameters to output stream of request
 *
 * @param request
 * @param params
 * @throws IOException
 */
protected void sendParams(HttpURLConnection request, Object params)
        throws IOException {
    request.setDoOutput(true);
    if (params != null) {
        request.setRequestProperty(HEADER_CONTENT_TYPE, CONTENT_TYPE_JSON
                + "; charset=" + CHARSET_UTF8); //$NON-NLS-1$
        byte[] data = toJson(params).getBytes(CHARSET_UTF8);
        request.setFixedLengthStreamingMode(data.length);
        BufferedOutputStream output = new BufferedOutputStream(
                request.getOutputStream(), bufferSize);
        try {
            output.write(data);
            output.flush();
        } finally {
            try {
                output.close();
            } catch (IOException ignored) {
                // Ignored
            }
        }
    } else {
        request.setFixedLengthStreamingMode(0);
        request.setRequestProperty("Content-Length", "0");
    }
}
 

public static String uploadToHaste(String baseUrl, String extension, String str) throws IOException {
    byte[] bytes = str.getBytes(StandardCharsets.UTF_8);

    URL uploadURL = new URL(baseUrl + "/documents");
    HttpURLConnection connection = (HttpURLConnection) uploadURL.openConnection();
    connection.setRequestMethod("POST");
    connection.setRequestProperty("Content-Type", "text/plain; charset=UTF-8");
    connection.setFixedLengthStreamingMode(bytes.length);
    connection.setDoInput(true);
    connection.setDoOutput(true);
    connection.connect();

    try {
        try (OutputStream os = connection.getOutputStream()) {
            os.write(bytes);
        }

        try (InputStream is = connection.getInputStream()) {
            JsonObject json = new Gson().fromJson(new InputStreamReader(is), JsonObject.class);
            return baseUrl + "/" + json.get("key").getAsString() + (extension == null || extension.isEmpty() ? "" : "." + extension);
        }
    } finally {
        connection.disconnect();
    }
}
 

/**
 * Upload the paste and return the status message
 *
 * @return Status message
 * @throws Throwable any and all exceptions
 */
public final String upload() throws Throwable {
    final URL url = new URL(UPLOAD_PATH);
    final URLConnection connection = url.openConnection();
    final HttpURLConnection httpURLConnection = (HttpURLConnection) connection;
    httpURLConnection.setRequestMethod("POST");
    httpURLConnection.setDoOutput(true);
    final byte[] content = toJsonString().getBytes(Charsets.UTF_8);
    httpURLConnection.setFixedLengthStreamingMode(content.length);
    httpURLConnection.setRequestProperty("Content-Type", "application/json");
    httpURLConnection.setRequestProperty("Accept", "*/*");
    httpURLConnection.connect();
    try (final OutputStream stream = httpURLConnection.getOutputStream()) {
        stream.write(content);
    }
    if (!httpURLConnection.getResponseMessage().contains("OK")) {
        throw new IllegalStateException(String.format("Server returned status: %d %s",
                httpURLConnection.getResponseCode(), httpURLConnection.getResponseMessage()));
    }
    final StringBuilder input = new StringBuilder();
    try (final BufferedReader inputStream = new BufferedReader(new InputStreamReader(httpURLConnection.getInputStream()))) {
        String line;
        while ((line = inputStream.readLine()) != null) {
            input.append(line).append("\n");
        }
    }
    return input.toString();
}
 

void test(String[] args) throws IOException {
    HttpServer httpServer = startHttpServer();
    int port = httpServer.getAddress().getPort();
    try {
        URL url = new URL("http://localhost:" + port + "/flis/");
        HttpURLConnection uc = (HttpURLConnection)url.openConnection();
        uc.setDoOutput(true);
        uc.setRequestMethod("POST");
        uc.setFixedLengthStreamingMode(POST_SIZE);
        OutputStream os = uc.getOutputStream();

        /* create a 32K byte array with data to POST */
        int thirtyTwoK = 32 * 1024;
        byte[] ba = new byte[thirtyTwoK];
        for (int i =0; i<thirtyTwoK; i++)
            ba[i] = (byte)i;

        long times = POST_SIZE / thirtyTwoK;
        for (int i=0; i<times; i++) {
            os.write(ba);
        }

        os.close();
        InputStream is = uc.getInputStream();
        while(is.read(ba) != -1);
        is.close();

        pass();
    } finally {
        httpServer.stop(0);
    }
}
 

void test(String[] args) throws IOException {
    HttpServer httpServer = startHttpServer();
    int port = httpServer.getAddress().getPort();
    try {
        URL url = new URL("http://localhost:" + port + "/flis/");
        HttpURLConnection uc = (HttpURLConnection)url.openConnection();
        uc.setDoOutput(true);
        uc.setRequestMethod("POST");
        uc.setFixedLengthStreamingMode(POST_SIZE);
        OutputStream os = uc.getOutputStream();

        /* create a 32K byte array with data to POST */
        int thirtyTwoK = 32 * 1024;
        byte[] ba = new byte[thirtyTwoK];
        for (int i =0; i<thirtyTwoK; i++)
            ba[i] = (byte)i;

        long times = POST_SIZE / thirtyTwoK;
        for (int i=0; i<times; i++) {
            os.write(ba);
        }

        os.close();
        InputStream is = uc.getInputStream();
        while(is.read(ba) != -1);
        is.close();

        pass();
    } finally {
        httpServer.stop(0);
    }
}
 

@SuppressLint("NewApi")
private static void setFixedLengthStreamingMode(final HttpURLConnection urlConnection,
        final long contentLength) {
    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {
        urlConnection.setFixedLengthStreamingMode((int) contentLength);
    } else {
        urlConnection.setFixedLengthStreamingMode(contentLength);
    }
}
 

void test(String[] args) throws IOException {
    HttpServer httpServer = startHttpServer();
    int port = httpServer.getAddress().getPort();
    try {
        URL url = new URL("http://localhost:" + port + "/flis/");
        HttpURLConnection uc = (HttpURLConnection)url.openConnection();
        uc.setDoOutput(true);
        uc.setRequestMethod("POST");
        uc.setFixedLengthStreamingMode(POST_SIZE);
        OutputStream os = uc.getOutputStream();

        /* create a 32K byte array with data to POST */
        int thirtyTwoK = 32 * 1024;
        byte[] ba = new byte[thirtyTwoK];
        for (int i =0; i<thirtyTwoK; i++)
            ba[i] = (byte)i;

        long times = POST_SIZE / thirtyTwoK;
        for (int i=0; i<times; i++) {
            os.write(ba);
        }

        os.close();
        InputStream is = uc.getInputStream();
        while(is.read(ba) != -1);
        is.close();

        pass();
    } finally {
        httpServer.stop(0);
    }
}
 

private void setFetchRequestBody(HttpURLConnection urlConnection, byte[] requestBody)
    throws IOException {
  urlConnection.setFixedLengthStreamingMode(requestBody.length);
  OutputStream out = new BufferedOutputStream(urlConnection.getOutputStream());
  out.write(requestBody);
  out.flush();
  out.close();
}
 

public void testCannotSetChunkedStreamingModeAfterFixedLengthStreamingMode() throws Exception {
    server.play();
    HttpURLConnection connection = (HttpURLConnection) server.getUrl("/").openConnection();
    connection.setFixedLengthStreamingMode(1);
    try {
        connection.setChunkedStreamingMode(1);
        fail();
    } catch (IllegalStateException expected) {
    }
}
 

public static String sendToUrl(final URL url, final String data) throws IOException 
{
    final HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
    try {
        urlConnection.setDoOutput(true);
        urlConnection.setDoInput(true);
        
        urlConnection.setConnectTimeout(CONNECT_TIMEOUT);
        urlConnection.setReadTimeout(READ_TIMEOUT);
        
        urlConnection.setRequestProperty("Content-Type", "application/json; charset=UTF-8");
        urlConnection.setRequestProperty("Accept", "application/json");
        
        final byte[] bytes = data.getBytes(Charset.forName("UTF-8"));
        urlConnection.setFixedLengthStreamingMode(bytes.length);
        urlConnection.getOutputStream().write(bytes);
        
        final StringBuilder stringBuilder = new StringBuilder();
        final BufferedReader reader = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));
        int read;
        final char[] chars = new char[1024];
        while ((read = reader.read(chars)) != -1)
            stringBuilder.append(chars, 0, read);
        return stringBuilder.toString();
    } finally {
        urlConnection.disconnect();
    }
}
 

public void testCannotSetFixedLengthStreamingModeAfterChunkedStreamingMode() throws Exception {
    server.play();
    HttpURLConnection connection = (HttpURLConnection) server.getUrl("/").openConnection();
    connection.setChunkedStreamingMode(1);
    try {
        connection.setFixedLengthStreamingMode(1);
        fail();
    } catch (IllegalStateException expected) {
    }
}
 

/**
 * Constructs a HttpURLConnection to set the file's properties, Sign with zero length specified.
 * 
 * @param uri
 *            A <code>java.net.URI</code> object that specifies the absolute URI.
 * @param fileOptions
 *            A {@link FileRequestOptions} object that specifies execution options such as retry policy and timeout
 *            settings for the operation. Specify <code>null</code> to use the request options specified on the
 *            {@link CloudFileClient}.
 * @param opContext
 *            An {@link OperationContext} object that represents the context for the current operation. This object
 *            is used to track requests to the storage service, and to provide additional runtime information about
 *            the operation.
 * @param accessCondition
 *            An {@link AccessCondition} object that represents the access conditions for the file.
 * @param properties
 *            The properties to upload.
 * @return a HttpURLConnection to use to perform the operation.
 * @throws IOException
 *             if there is an error opening the connection
 * @throws URISyntaxException
 *             if the resource URI is invalid
 * @throws StorageException
 *             an exception representing any error which occurred during the operation.
 * @throws IllegalArgumentException
 */
public static HttpURLConnection setFileProperties(final URI uri, final FileRequestOptions fileOptions,
        final OperationContext opContext, final AccessCondition accessCondition, final FileProperties properties)
        throws IOException, URISyntaxException, StorageException {
    final UriQueryBuilder builder = new UriQueryBuilder();
    builder.add(Constants.QueryConstants.COMPONENT, Constants.QueryConstants.PROPERTIES);

    final HttpURLConnection request = BaseRequest.createURLConnection(uri, fileOptions, builder, opContext);

    request.setFixedLengthStreamingMode(0);
    request.setDoOutput(true);
    request.setRequestMethod(Constants.HTTP_PUT);

    if (accessCondition != null) {
        accessCondition.applyConditionToRequest(request);
    }

    if (properties != null) {
        addProperties(request, properties);
    }

    return request;
}
 

HttpURLConnection convertAndSend(Request request, Options options) throws IOException {
  final URL url = new URL(request.url());
  final HttpURLConnection connection = this.getConnection(url);
  if (connection instanceof HttpsURLConnection) {
    HttpsURLConnection sslCon = (HttpsURLConnection) connection;
    if (sslContextFactory != null) {
      sslCon.setSSLSocketFactory(sslContextFactory);
    }
    if (hostnameVerifier != null) {
      sslCon.setHostnameVerifier(hostnameVerifier);
    }
  }
  connection.setConnectTimeout(options.connectTimeoutMillis());
  connection.setReadTimeout(options.readTimeoutMillis());
  connection.setAllowUserInteraction(false);
  connection.setInstanceFollowRedirects(options.isFollowRedirects());
  connection.setRequestMethod(request.httpMethod().name());

  Collection<String> contentEncodingValues = request.headers().get(CONTENT_ENCODING);
  boolean gzipEncodedRequest =
      contentEncodingValues != null && contentEncodingValues.contains(ENCODING_GZIP);
  boolean deflateEncodedRequest =
      contentEncodingValues != null && contentEncodingValues.contains(ENCODING_DEFLATE);

  boolean hasAcceptHeader = false;
  Integer contentLength = null;
  for (String field : request.headers().keySet()) {
    if (field.equalsIgnoreCase("Accept")) {
      hasAcceptHeader = true;
    }
    for (String value : request.headers().get(field)) {
      if (field.equals(CONTENT_LENGTH)) {
        if (!gzipEncodedRequest && !deflateEncodedRequest) {
          contentLength = Integer.valueOf(value);
          connection.addRequestProperty(field, value);
        }
      } else {
        connection.addRequestProperty(field, value);
      }
    }
  }
  // Some servers choke on the default accept string.
  if (!hasAcceptHeader) {
    connection.addRequestProperty("Accept", "*/*");
  }

  if (request.body() != null) {
    if (disableRequestBuffering) {
      if (contentLength != null) {
        connection.setFixedLengthStreamingMode(contentLength);
      } else {
        connection.setChunkedStreamingMode(8196);
      }
    }
    connection.setDoOutput(true);
    OutputStream out = connection.getOutputStream();
    if (gzipEncodedRequest) {
      out = new GZIPOutputStream(out);
    } else if (deflateEncodedRequest) {
      out = new DeflaterOutputStream(out);
    }
    try {
      out.write(request.body());
    } finally {
      try {
        out.close();
      } catch (IOException suppressed) { // NOPMD
      }
    }
  }
  return connection;
}
 

/**
 * Constructs a HttpURLConnection to create a snapshot of the blob. Sign with 0 length.
 * 
 * @param uri
 *            A <code>java.net.URI</code> object that specifies the absolute URI.
 * @param blobOptions
 *            A {@link BlobRequestOptions} object that specifies execution options such as retry policy and timeout
 *            settings for the operation. Specify <code>null</code> to use the request options specified on the
 *            {@link CloudBlobClient}.
 * @param opContext
 *            An {@link OperationContext} object that represents the context for the current operation. This object
 *            is used to track requests to the storage service, and to provide additional runtime information about
 *            the operation.
 * @param accessCondition
 *            An {@link AccessCondition} object that represents the access conditions for the blob.
 * @return a HttpURLConnection to use to perform the operation.
 * @throws IOException
 *             if there is an error opening the connection
 * @throws URISyntaxException
 *             if the resource URI is invalid
 * @throws StorageException
 *             an exception representing any error which occurred during the operation.
 * @throws IllegalArgumentException
 */
public static HttpURLConnection snapshot(final URI uri, final BlobRequestOptions blobOptions,
        final OperationContext opContext, final AccessCondition accessCondition) throws IOException,
        URISyntaxException, StorageException {
    final UriQueryBuilder builder = new UriQueryBuilder();
    builder.add(Constants.QueryConstants.COMPONENT, BlobConstants.SNAPSHOT);
    final HttpURLConnection request = createURLConnection(uri, builder, blobOptions, opContext);

    request.setFixedLengthStreamingMode(0);
    request.setDoOutput(true);
    request.setRequestMethod(Constants.HTTP_PUT);

    if (accessCondition != null) {
        accessCondition.applyConditionToRequest(request);
    }

    return request;
}
 

protected void sendSync(String content) throws IOException {
  if (sent) {
    return;
  }
  try {
    URLConnection c;
    synchronized (this) {
      c = this.connection;
    }
    if (c == null) {
      return;
    }
    sent = true;
    initConnectionRequestHeader(c);
    int istatus;
    String istatusText;
    InputStream err;
    if (c instanceof HttpURLConnection) {
      HttpURLConnection hc = (HttpURLConnection) c;
      String method = this.requestMethod == null ? DEFAULT_REQUEST_METHOD : this.requestMethod;

      method = method.toUpperCase();
      hc.setRequestMethod(method);
      if ("POST".equals(method) && content != null) {
        hc.setDoOutput(true);
        byte[] contentBytes = content.getBytes(postCharset);
        hc.setFixedLengthStreamingMode(contentBytes.length);
        OutputStream out = hc.getOutputStream();
        try {
          out.write(contentBytes);
        } finally {
          out.flush();
        }
      }
      istatus = hc.getResponseCode();
      istatusText = hc.getResponseMessage();
      err = hc.getErrorStream();
    } else {
      istatus = 0;
      istatusText = "";
      err = null;
    }
    synchronized (this) {
      this.responseHeaders = getConnectionResponseHeaders(c);
      this.responseHeadersMap = c.getHeaderFields();
    }
    this.changeState(AjaxHttpRequest.STATE_LOADED, istatus, istatusText, null);
    InputStream in = err == null ? c.getInputStream() : err;
    int contentLength = c.getContentLength();

    this.changeState(AjaxHttpRequest.STATE_INTERACTIVE, istatus, istatusText, null);
    byte[] bytes = loadStream(in, contentLength == -1 ? 4096 : contentLength);
    this.changeState(AjaxHttpRequest.STATE_COMPLETE, istatus, istatusText, bytes);
  } finally {
    synchronized (this) {
      this.connection = null;
      sent = false;
    }
  }
}
 

/**
     * Test that request body chunking works. This test has been relaxed from treating
     * the {@link java.net.HttpURLConnection#setChunkedStreamingMode(int)}
     * chunk length as being fixed because OkHttp no longer guarantees
     * the fixed chunk size. Instead, we check that chunking takes place
     * and we force the chunk size with flushes.
     */
//    public void testSetChunkedStreamingMode() throws IOException, InterruptedException {
//        server.enqueue(new MockResponse());
//        server.play();
//
//        HttpURLConnection urlConnection = (HttpURLConnection) server.getUrl("/").openConnection();
//        // Later releases of Android ignore the value for chunkLength if it is > 0 and default to
//        // a fixed chunkLength. During the change-over period while the chunkLength indicates the
//        // chunk buffer size (inc. header) the chunkLength has to be >= 8. This enables the flush()
//        // to dictate the size of the chunks.
//        urlConnection.setChunkedStreamingMode(50 /* chunkLength */);
//        urlConnection.setDoOutput(true);
//        OutputStream outputStream = urlConnection.getOutputStream();
//        String outputString = "ABCDEFGH";
//        byte[] outputBytes = outputString.getBytes("US-ASCII");
//        int targetChunkSize = 3;
//        for (int i = 0; i < outputBytes.length; i += targetChunkSize) {
//            int count = i + targetChunkSize < outputBytes.length ? 3 : outputBytes.length - i;
//            outputStream.write(outputBytes, i, count);
//            outputStream.flush();
//        }
//        assertEquals(200, urlConnection.getResponseCode());
//
//        RecordedRequest request = server.takeRequest();
//        assertEquals(outputString, new String(request.getBody(), "US-ASCII"));
//        assertEquals(Arrays.asList(3, 3, 2), request.getChunkSizes());
//    }

// TODO(tball): b/28067294
//    public void testAuthenticateWithFixedLengthStreaming() throws Exception {
//        testAuthenticateWithStreamingPost(StreamingMode.FIXED_LENGTH);
//    }

// TODO(tball): b/28067294
//    public void testAuthenticateWithChunkedStreaming() throws Exception {
//        testAuthenticateWithStreamingPost(StreamingMode.CHUNKED);
//    }

    private void testAuthenticateWithStreamingPost(StreamingMode streamingMode) throws Exception {
        MockResponse pleaseAuthenticate = new MockResponse()
                .setResponseCode(401)
                .addHeader("WWW-Authenticate: Basic realm=\"protected area\"")
                .setBody("Please authenticate.");
        server.enqueue(pleaseAuthenticate);
        server.play();

        Authenticator.setDefault(new SimpleAuthenticator());
        HttpURLConnection connection = (HttpURLConnection) server.getUrl("/").openConnection();
        connection.setDoOutput(true);
        byte[] requestBody = { 'A', 'B', 'C', 'D' };
        if (streamingMode == StreamingMode.FIXED_LENGTH) {
            connection.setFixedLengthStreamingMode(requestBody.length);
        } else if (streamingMode == StreamingMode.CHUNKED) {
            connection.setChunkedStreamingMode(0);
        }
        OutputStream outputStream = connection.getOutputStream();
        outputStream.write(requestBody);
        outputStream.close();
        try {
            connection.getInputStream();
            fail();
        } catch (HttpRetryException expected) {
        }

        // no authorization header for the request...
        RecordedRequest request = server.takeRequest();
        assertContainsNoneMatching(request.getHeaders(), "Authorization: Basic .*");
        assertEquals(Arrays.toString(requestBody), Arrays.toString(request.getBody()));
    }
 

@Override
public Connection connect(Request request) throws IOException {
    URL url = new URL(request.url().toString(true));
    Proxy proxy = request.proxy();
    HttpURLConnection connection = open(url, proxy);

    connection.setConnectTimeout(request.connectTimeout());
    connection.setReadTimeout(request.readTimeout());
    connection.setInstanceFollowRedirects(false);

    if (connection instanceof HttpsURLConnection) {
        SSLSocketFactory sslSocketFactory = request.sslSocketFactory();
        if (sslSocketFactory != null)
            ((HttpsURLConnection) connection).setSSLSocketFactory(sslSocketFactory);
        HostnameVerifier hostnameVerifier = request.hostnameVerifier();
        if (hostnameVerifier != null)
            ((HttpsURLConnection) connection).setHostnameVerifier(hostnameVerifier);
    }

    RequestMethod method = request.method();
    connection.setRequestMethod(method.toString());
    connection.setDoInput(true);
    boolean isAllowBody = method.allowBody();
    connection.setDoOutput(isAllowBody);

    Headers headers = request.headers();

    if (isAllowBody) {
        long contentLength = headers.getContentLength();
        if (contentLength <= Integer.MAX_VALUE) connection.setFixedLengthStreamingMode((int) contentLength);
        else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) connection.setFixedLengthStreamingMode(contentLength);
        else connection.setChunkedStreamingMode(256 * 1024);
    }

    Map<String, String> requestHeaders = Headers.getRequestHeaders(headers);
    for (Map.Entry<String, String> headerEntry : requestHeaders.entrySet()) {
        String headKey = headerEntry.getKey();
        String headValue = headerEntry.getValue();
        connection.setRequestProperty(headKey, headValue);
    }

    connection.connect();
    return new URLConnection(connection);
}
 

public static String generateUploadURL(String filePath, int appId) {
    try {

        JsonObject jsonObject = new JsonObject();
        jsonObject.addProperty("filename", filePath);
        if (appId != 0) {
            jsonObject.addProperty("appId", appId);
        }

        URL obj = new URL("https://api.kobiton.com/v1/apps/uploadUrl");
        HttpURLConnection con = (HttpURLConnection) obj.openConnection();
        con.setRequestMethod("POST");
        con.setDoInput(true);
        con.setDoOutput(true);
        con.setRequestProperty("Content-Type", "application/json");
        con.setRequestProperty("Accept", "application/json");
        con.setFixedLengthStreamingMode(jsonObject.toString().getBytes().length);
        con.setRequestProperty("Authorization", generateBasicAuth());

        OutputStream os = new BufferedOutputStream(con.getOutputStream());
        os.write(jsonObject.toString().getBytes());
        os.flush();

        int responseCode = con.getResponseCode();
        BufferedReader in = new BufferedReader(
                new InputStreamReader(con.getInputStream()));
        String inputLine;
        StringBuffer response = new StringBuffer();
        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);
        }
        in.close();
        String result = response.toString();
        System.out.println("generateUploadURL: " + result);
        return result;

    } catch (Exception ex) {
        System.out.println(ex.toString());
        return null;
    }
}
 

/**
 * Constructs a HttpURLConnection to upload a page. Sign with page length for update, or 0 for clear.
 * 
 * @param uri
 *            A <code>java.net.URI</code> object that specifies the absolute URI.
 * @param blobOptions
 *            A {@link BlobRequestOptions} object that specifies execution options such as retry policy and timeout
 *            settings for the operation. Specify <code>null</code> to use the request options specified on the
 *            {@link CloudBlobClient}.
 * @param opContext
 *            An {@link OperationContext} object that represents the context for the current operation. This object
 *            is used to track requests to the storage service, and to provide additional runtime information about
 *            the operation.
 * @param accessCondition
 *            An {@link AccessCondition} object that represents the access conditions for the blob.
 * @param pageRange
 *            A {@link PageRange} object that represents the page range.
 * @param operationType
 *            A {@link PageOperationType} object that represents the page range operation type.
 * @return a HttpURLConnection to use to perform the operation.
 * @throws IOException
 *             if there is an error opening the connection
 * @throws URISyntaxException
 *             if the resource URI is invalid
 * @throws StorageException
 *             an exception representing any error which occurred during the operation.
 * @throws IllegalArgumentException
 */
public static HttpURLConnection putPage(final URI uri, final BlobRequestOptions blobOptions,
        final OperationContext opContext, final AccessCondition accessCondition, final PageRange pageRange,
        final PageOperationType operationType) throws IOException, URISyntaxException, StorageException {
    final UriQueryBuilder builder = new UriQueryBuilder();
    builder.add(Constants.QueryConstants.COMPONENT, PAGE_QUERY_ELEMENT_NAME);

    final HttpURLConnection request = createURLConnection(uri, builder, blobOptions, opContext);

    request.setDoOutput(true);
    request.setRequestMethod(Constants.HTTP_PUT);

    if (operationType == PageOperationType.CLEAR) {
        request.setFixedLengthStreamingMode(0);
    }

    // Page write is either update or clean; required
    request.setRequestProperty(BlobConstants.PAGE_WRITE, operationType.toString());
    request.setRequestProperty(Constants.HeaderConstants.STORAGE_RANGE_HEADER, pageRange.toString());

    if (accessCondition != null) {
        accessCondition.applyConditionToRequest(request);
        accessCondition.applySequenceConditionToRequest(request);
    }

    return request;
}