Example usage for java.io Writer flush

List of usage examples for java.io Writer flush

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Introduction

In this page you can find the example usage for java.io Writer flush.

Prototype

public abstract void flush() throws IOException;

Source Link

Document

Flushes the stream.

Usage

From source file:com.adr.raspberryleds.HTTPUtils.java

public static JSONObject execPOST(String address, JSONObject params) throws IOException {

    BufferedReader readerin = null;
    Writer writerout = null;

    try {/*from w  w w.  j  av  a2s.c  om*/
        URL url = new URL(address);
        String query = params.toString();

        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setReadTimeout(10000 /* milliseconds */);
        connection.setConnectTimeout(15000 /* milliseconds */);
        connection.setRequestMethod("POST");
        connection.setAllowUserInteraction(false);

        connection.setUseCaches(false);
        connection.setDoInput(true);
        connection.setDoOutput(true);

        connection.addRequestProperty("Content-Type", "application/json,encoding=UTF-8");
        connection.addRequestProperty("Content-length", String.valueOf(query.length()));

        writerout = new OutputStreamWriter(connection.getOutputStream(), "UTF-8");
        writerout.write(query);
        writerout.flush();

        writerout.close();
        writerout = null;

        int responsecode = connection.getResponseCode();
        if (responsecode == HttpURLConnection.HTTP_OK) {
            StringBuilder text = new StringBuilder();

            readerin = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));
            String line = null;
            while ((line = readerin.readLine()) != null) {
                text.append(line);
                text.append(System.getProperty("line.separator"));
            }

            JSONObject result = new JSONObject(text.toString());

            if (result.has("exception")) {
                throw new IOException(
                        MessageFormat.format("Remote exception: {0}.", result.getString("exception")));
            } else {
                return result;
            }
        } else {
            throw new IOException(MessageFormat.format("HTTP response error: {0}. {1}",
                    Integer.toString(responsecode), connection.getResponseMessage()));
        }
    } catch (JSONException ex) {
        throw new IOException(MessageFormat.format("Parse exception: {0}.", ex.getMessage()));
    } finally {
        if (writerout != null) {
            writerout.close();
            writerout = null;
        }
        if (readerin != null) {
            readerin.close();
            readerin = null;
        }
    }
}

From source file:net.sf.jasperreports.engine.fonts.SimpleFontExtensionHelper.java

/**
 *
 *///w  w  w  .  j av  a2 s . c om
public static void writeFontExtensionsProperties(String fontRegistryFactoryPropertyName,
        String fontRegistryFactoryPropertyValue, String fontFamiliesPropertyName,
        String fontFamiliesPropertyValue, OutputStream outputStream) throws JRException {
    Writer out = null;
    try {
        out = new OutputStreamWriter(outputStream, DEFAULT_ENCODING);
        out.write(fontRegistryFactoryPropertyName + "=" + fontRegistryFactoryPropertyValue + "\n");
        out.write(fontFamiliesPropertyName + "=" + fontFamiliesPropertyValue + "\n");
        out.flush();
    } catch (Exception e) {
        throw new JRException(EXCEPTION_MESSAGE_KEY_OUTPUT_STREAM_WRITER_ERROR, null, e);
    } finally {
        if (out != null) {
            try {
                out.close();
            } catch (IOException e) {
            }
        }
    }
}

From source file:com.ibm.team.build.internal.hjplugin.util.HttpUtils.java

/**
 * Perform PUT request against an RTC server
 * @param serverURI The RTC server//from   w w w.j ava2 s  .co  m
 * @param uri The relative URI for the PUT. It is expected that it is already encoded if necessary.
 * @param userId The userId to authenticate as
 * @param password The password to authenticate with
 * @param timeout The timeout period for the connection (in seconds)
 * @param json The JSON object to put to the RTC server
 * @param httpContext The context from the login if cycle is being managed by the caller
 * Otherwise <code>null</code> and this call will handle the login.
 * @param listener The listener to report errors to.
 * May be <code>null</code> if there is no listener.
 * @return The HttpContext for the request. May be reused in subsequent requests
 * for the same user
 * @throws IOException Thrown if things go wrong
 * @throws InvalidCredentialsException
 * @throws GeneralSecurityException 
 */
public static HttpClientContext performPut(String serverURI, String uri, String userId, String password,
        int timeout, final JSONObject json, HttpClientContext httpContext, TaskListener listener)
        throws IOException, InvalidCredentialsException, GeneralSecurityException {

    CloseableHttpClient httpClient = getClient();
    // How to fill the request body (Clone doesn't work)
    ContentProducer cp = new ContentProducer() {
        public void writeTo(OutputStream outstream) throws IOException {
            Writer writer = new OutputStreamWriter(outstream, UTF_8);
            json.write(writer);
            writer.flush();
        }
    };
    HttpEntity entity = new EntityTemplate(cp);
    String fullURI = getFullURI(serverURI, uri);
    HttpPut put = getPUT(fullURI, timeout);
    put.setEntity(entity);

    if (httpContext == null) {
        httpContext = createHttpContext();
    }

    LOGGER.finer("PUT: " + put.getURI()); //$NON-NLS-1$
    CloseableHttpResponse response = httpClient.execute(put, httpContext);
    try {
        // based on the response do any authentication. If authentication requires
        // the request to be performed again (i.e. Basic auth) re-issue request
        response = authenticateIfRequired(response, httpClient, httpContext, serverURI, userId, password,
                timeout, listener);

        // retry put request if we have to do authentication
        if (response == null) {
            put = getPUT(fullURI, timeout);
            put.setEntity(entity);
            response = httpClient.execute(put, httpContext);
        }

        int statusCode = response.getStatusLine().getStatusCode();
        if (statusCode == 401) {
            // It is an unusual case to get here (in our current work flow) because it means
            // the user has become unauthenticated since the previous request 
            // (i.e. the get of the value about to put back)
            throw new InvalidCredentialsException(Messages.HttpUtils_authentication_failed(userId, serverURI));

        } else {
            int responseClass = statusCode / 100;
            if (responseClass != 2) {
                if (listener != null) {
                    listener.fatalError(Messages.HttpUtils_PUT_failed(fullURI, statusCode));
                }

                throw logError(fullURI, response, Messages.HttpUtils_PUT_failed(fullURI, statusCode));
            }
            return httpContext;
        }
    } finally {
        closeResponse(response);
    }
}

From source file:org.opennms.ng.services.snmpconfig.SnmpPeerFactory.java

public static void saveToFile(final File file)
        throws UnsupportedEncodingException, FileNotFoundException, IOException {
    // Marshal to a string first, then write the string to the file. This
    // way the original config
    // isn't lost if the XML from the marshal is hosed.
    final String marshalledConfig = marshallConfig();

    SnmpPeerFactory.getWriteLock().lock();
    FileOutputStream out = null;//  w ww .  ja  v a  2  s  .  com
    Writer fileWriter = null;
    try {
        if (marshalledConfig != null) {
            out = new FileOutputStream(file);
            fileWriter = new OutputStreamWriter(out, "UTF-8");
            fileWriter.write(marshalledConfig);
            fileWriter.flush();
            fileWriter.close();
        }
    } finally {
        IOUtils.closeQuietly(fileWriter);
        IOUtils.closeQuietly(out);
        SnmpPeerFactory.getWriteLock().unlock();
    }
}

From source file:org.apache.manifoldcf.crawler.connectors.meridio.CommonsHTTPSender.java

private static String getResponseBodyAsString(BackgroundHTTPThread methodThread)
        throws IOException, InterruptedException, HttpException {
    InputStream is = methodThread.getSafeInputStream();
    if (is != null) {
        try {/*from  ww w.j  a v a2s . c  om*/
            String charSet = methodThread.getCharSet();
            if (charSet == null)
                charSet = "utf-8";
            char[] buffer = new char[65536];
            Reader r = new InputStreamReader(is, charSet);
            Writer w = new StringWriter();
            try {
                while (true) {
                    int amt = r.read(buffer);
                    if (amt == -1)
                        break;
                    w.write(buffer, 0, amt);
                }
            } finally {
                w.flush();
            }
            return w.toString();
        } finally {
            is.close();
        }
    }
    return "";
}

From source file:org.apache.manifoldcf.connectorcommon.common.CommonsHTTPSender.java

private static String getResponseBodyAsString(BackgroundHTTPThread methodThread)
        throws IOException, InterruptedException, HttpException {
    InputStream is = methodThread.getSafeInputStream();
    if (is != null) {
        try {//from  ww w. ja  v a2s  . co  m
            Charset charSet = methodThread.getCharSet();
            if (charSet == null)
                charSet = StandardCharsets.UTF_8;
            char[] buffer = new char[65536];
            Reader r = new InputStreamReader(is, charSet);
            Writer w = new StringWriter();
            try {
                while (true) {
                    int amt = r.read(buffer);
                    if (amt == -1)
                        break;
                    w.write(buffer, 0, amt);
                }
            } finally {
                w.flush();
            }
            return w.toString();
        } finally {
            is.close();
        }
    }
    return "";
}

From source file:com.chen.emailcommon.internet.Rfc822Output.java

/**
 * Write the body text.//from  ww  w .j  a  v a  2 s  .c  om
 *
 * Note this always uses base64, even when not required.  Slightly less efficient for
 * US-ASCII text, but handles all formats even when non-ascii chars are involved.  A small
 * optimization might be to prescan the string for safety and send raw if possible.
 *
 * @param writer the output writer
 * @param out the output stream inside the writer (used for byte[] access)
 * @param bodyText Plain text and HTML versions of the original text of the message
 */
private static void writeTextWithHeaders(Writer writer, OutputStream out, String[] bodyText)
        throws IOException {
    boolean html = false;
    String text = bodyText[INDEX_BODY_TEXT];
    if (text == null) {
        text = bodyText[INDEX_BODY_HTML];
        html = true;
    }
    if (text == null) {
        writer.write("\r\n"); // a truly empty message
    } else {
        // first multipart element is the body
        String mimeType = "text/" + (html ? "html" : "plain");
        writeHeader(writer, "Content-Type", mimeType + "; charset=utf-8");
        writeHeader(writer, "Content-Transfer-Encoding", "base64");
        writer.write("\r\n");
        byte[] textBytes = text.getBytes("UTF-8");
        writer.flush();
        out.write(Base64.encode(textBytes, Base64.CRLF));
    }
}

From source file:nl.flotsam.calendar.web.CalendarIcalView.java

@Override
protected void renderMergedOutputModel(Map<String, Object> model, HttpServletRequest request,
        HttpServletResponse response) throws Exception {
    Calendar calendar = getCalendarToBeRendered(model);
    if (calendar == null) {
        throw new ServletException("Failed to locate Calendar to be rendered.");
    }//  w w  w.  j  a  va 2 s.  c om
    response.setContentType("text/calendar");
    // TODO: We can leverage data from the Calendar here
    response.setHeader("Cache-Control", "no-cache");
    response.setCharacterEncoding("UTF-8");
    Writer writer = response.getWriter();
    calendar.toIcal(writer);
    writer.flush();
}

From source file:com.kingdee.eas.bos.pureflex.manager.sce.SCEContentProvider.java

public void writeTo(OutputStream outstream) throws IOException {
    Writer writer = new OutputStreamWriter(outstream, "UTF-8"); //$NON-NLS-1$
    writer.write(content);/*from w w w .  j  a v a 2s.co m*/
    writer.flush();
}

From source file:cn.vlabs.umt.ui.tags.RequestCount.java

public int doStartTag() throws JspException {
    BeanFactory factory = (BeanFactory) pageContext.getServletContext()
            .getAttribute(Attributes.APPLICATION_CONTEXT_KEY);
    RequestService us = (RequestService) factory.getBean("RequestService");
    int count = us.getRequestCount(UserRequest.INIT);
    try {/*  w  w  w  .  ja va2s . c  o  m*/
        Writer writer = pageContext.getOut();
        writer.write(Integer.toString(count));
        writer.flush();
    } catch (IOException e) {
        throw new JspException(e);
    }
    return SKIP_BODY;
}