Example usage for javax.servlet.http HttpServletResponse setContentType

List of usage examples for javax.servlet.http HttpServletResponse setContentType

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Introduction

In this page you can find the example usage for javax.servlet.http HttpServletResponse setContentType.

Prototype


public void setContentType(String type);

Source Link

Document

Sets the content type of the response being sent to the client, if the response has not been committed yet.

Usage

From source file:com.jsmartframework.web.manager.WebContext.java

/**
 * Write response directly as Event-Stream for Server Sent Events.
 *
 * @param asyncContext - Asynchronous Context.
 * @param event - Name of event to be written on response.
 * @param data - Content of event ot be written on response.
 * @param retry - Time in (milliseconds) for client retry opening connection.
 *              after asynchronous context is closed.
 * @throws IOException/*from   ww  w.j  a v a 2s  .co  m*/
 */
public static void writeResponseAsEventStream(AsyncContext asyncContext, String event, Object data, Long retry)
        throws IOException {
    if (asyncContext != null && event != null && data != null) {
        HttpServletResponse response = (HttpServletResponse) asyncContext.getResponse();
        response.setContentType("text/event-stream");
        PrintWriter printWriter = response.getWriter();

        if (retry != null) {
            printWriter.write("retry:" + retry + "\n");
        }
        printWriter.write("event:" + event + "\n");
        printWriter.write("data:" + data + "\n\n");
        printWriter.flush();
    }
}

From source file:com.dien.upload.server.UploadServlet.java

protected static void renderJSONResponse(HttpServletRequest request, HttpServletResponse response,
        String message) throws IOException {

    //json????//from w w w .ja  v  a  2s.c om

    response.setContentType("text/html;charset=utf-8");
    PrintWriter out;
    try {
        out = response.getWriter();
        out.write(message);
        out.flush();
        out.close();
    } catch (IOException e) {
        e.printStackTrace();
    }

}

From source file:com.dien.upload.server.UploadServlet.java

/**
 * Writes a XML response to the client. 
 * The message must be a text which will be wrapped in an XML structure.
 * //  w  w  w  . j  ava 2 s .  c o  m
 * Note: if the request is a POST, the response should set the content type 
 *  to text/html or text/plain in order to be able in the client side to
 *  read the iframe body (submitCompletEvent.getResults()), otherwise the
 *  method returns null 
 * 
 * @param request
 * @param response
 * @param message
 * @param post
 *        specify whether the request is post or not.   
 * @throws IOException
 */
protected static void renderXmlResponse(HttpServletRequest request, HttpServletResponse response,
        String message, boolean post) throws IOException {

    //json????

    response.setContentType("text/html;charset=utf-8");
    PrintWriter out;
    try {
        out = response.getWriter();
        out.write("<html><body><textarea>" + message + "</textarea></body></html>");
        out.flush();
        out.close();
    } catch (IOException e) {
        e.printStackTrace();
    }

}

From source file:com.openkm.util.WebUtils.java

/**
 * Prepare to send the file./*from www. j a  v  a 2 s  .  co  m*/
 */
public static void prepareSendFile(HttpServletRequest request, HttpServletResponse response, String fileName,
        String mimeType, boolean inline) throws UnsupportedEncodingException {
    String userAgent = WebUtils.getHeader(request, "user-agent").toLowerCase();

    // Disable browser cache
    response.setHeader("Expires", "Sat, 6 May 1971 12:00:00 GMT");
    response.setHeader("Cache-Control", "must-revalidate");
    response.addHeader("Cache-Control", "no-store, no-cache, must-revalidate");
    response.addHeader("Cache-Control", "post-check=0, pre-check=0");
    response.setHeader("Pragma", "no-cache");

    // Set MIME type
    response.setContentType(mimeType);

    if (userAgent.contains("msie") || userAgent.contains("trident")) {
        log.debug("Agent: Explorer ({})", request.getServerPort());
        fileName = URLEncoder.encode(fileName, "UTF-8").replaceAll("\\+", " ");

        if (request.getServerPort() == 443) {
            log.debug("HTTPS detected! Apply IE workaround...");
            response.setHeader("Cache-Control", "max-age=1");
            response.setHeader("Pragma", "public");
        }
    } else if (userAgent.contains("iphone") || userAgent.contains("ipad")) {
        log.debug("Agent: iPhone - iPad");
        // Do nothing
    } else if (userAgent.contains("android")) {
        log.debug("Agent: Android");
        fileName = URLEncoder.encode(fileName, "UTF-8").replaceAll("\\+", " ");
    } else if (userAgent.contains("mozilla")) {
        log.debug("Agent: Mozilla");
        fileName = MimeUtility.encodeText(fileName, "UTF-8", "B");
    } else {
        log.debug("Agent: Unknown");
    }

    if (inline) {
        response.setHeader("Content-disposition", "inline; filename=\"" + fileName + "\"");
    } else {
        response.setHeader("Content-disposition", "attachment; filename=\"" + fileName + "\"");
    }
}

From source file:org.shareok.data.webserv.WebUtil.java

public static void setupFileDownload(HttpServletResponse response, String downloadPath) {
    try {//from w  w w . ja v  a 2  s . c  o  m
        File file = new File(downloadPath);
        if (!file.exists()) {
            String errorMessage = "Sorry. The file you are looking for does not exist";
            System.out.println(errorMessage);
            OutputStream outputStream = response.getOutputStream();
            outputStream.write(errorMessage.getBytes(Charset.forName("UTF-8")));
            outputStream.close();
            return;
        }

        String mimeType = URLConnection.guessContentTypeFromName(file.getName());
        if (mimeType == null) {
            System.out.println("mimetype is not detectable, will take default");
            mimeType = "application/octet-stream";
        }

        response.setContentType(mimeType);
        /* "Content-Disposition : inline" will show viewable types [like images/text/pdf/anything viewable by browser] right on browser 
        while others(zip e.g) will be directly downloaded [may provide save as popup, based on your browser setting.]*/
        response.setHeader("Content-Disposition",
                String.format("attachment; filename=\"" + file.getName() + "\""));

        /* "Content-Disposition : attachment" will be directly download, may provide save as popup, based on your browser setting*/
        //response.setHeader("Content-Disposition", String.format("attachment; filename=\"%s\"", file.getName()));

        response.setContentLength((int) file.length());

        InputStream inputStream = new BufferedInputStream(new FileInputStream(file));

        //Copy bytes from source to destination(outputstream in this example), closes both streams.
        FileCopyUtils.copy(inputStream, response.getOutputStream());
    } catch (IOException ioex) {
        logger.error("Cannot set up a file download.", ioex);
    }
}

From source file:com.berrysys.ussdgw.HttpUtils.java

/**
 * Do post./*from w  w w.j ava  2  s.  c  o  m*/
 *
 * @param req the req
 * @param resp the resp
 * @param dialogListener the dialog listener
 * @throws IOException Signals that an I/O exception has occurred.
 */
public static void doPost(HttpServletRequest req, HttpServletResponse resp, final DialogListener dialogListener)
        throws IOException {

    boolean available = GlobalNetworkInitiatedSemaphore.getInstance().getSemaphore().tryAcquire();

    if (!available) {
        queueFullLogic(resp);
        return;
    }

    final String ussdAppUrl = req.getHeader("ussd-app-url");

    log.trace(String.format("ussd-app-url: %s", ussdAppUrl));

    final String payload = getPayload(req);

    log.trace(String.format("payload: %s", payload));

    HawtDispatchUtil.getInstance().queueExecute(new Runnable() {

        @Override
        public void run() {
            processHttpRequest(payload, ussdAppUrl, dialogListener);
        }

    });

    String response = "Request received successfully.";

    resp.setContentType("text/html");
    resp.setStatus(HttpServletResponse.SC_OK);
    resp.getWriter().println(response);

}

From source file:org.shareok.data.webserv.WebUtil.java

public static void downloadFileFromServer(HttpServletResponse response, String downloadPath) {

    try {/*ww  w  . j a  v  a 2  s. co m*/
        File file = new File(downloadPath);
        if (!file.exists()) {
            String errorMessage = "Sorry. The file you are looking for does not exist";
            System.out.println(errorMessage);
            OutputStream outputStream = response.getOutputStream();
            outputStream.write(errorMessage.getBytes(Charset.forName("UTF-8")));
            outputStream.close();
            return;
        }

        String mimeType = URLConnection.guessContentTypeFromName(file.getName());
        if (mimeType == null) {
            System.out.println("mimetype is not detectable, will take default");
            mimeType = "application/octet-stream";
        }

        response.setContentType(mimeType);
        /* "Content-Disposition : inline" will show viewable types [like images/text/pdf/anything viewable by browser] right on browser 
        while others(zip e.g) will be directly downloaded [may provide save as popup, based on your browser setting.]*/
        response.setHeader("Content-Disposition",
                String.format("attachment; filename=\"" + file.getName() + "\""));

        /* "Content-Disposition : attachment" will be directly download, may provide save as popup, based on your browser setting*/
        //response.setHeader("Content-Disposition", String.format("attachment; filename=\"%s\"", file.getName()));

        response.setContentLength((int) file.length());

        InputStream inputStream = new BufferedInputStream(new FileInputStream(file));

        //Copy bytes from source to destination(outputstream in this example), closes both streams.
        FileCopyUtils.copy(inputStream, response.getOutputStream());
    } catch (IOException ioex) {
        logger.error("Cannot download file responding to downloading resquest!", ioex);
    }
}

From source file:elas.app.RunSearchAPI.java

@RequestMapping(value = "http://localhost:9200/yahoo/news/_search?search_type=dfs_query_then_fetch", method = RequestMethod.GET)
public String testSearch(HttpServletRequest request, HttpServletResponse response) {
    response.setContentType("text/html;charset=UTF-8");

    return null;/*ww  w.j  a  va2s .  c o  m*/
}

From source file:com.xqdev.jam.MLJAM.java

private static void sendClientProblemResponse(HttpServletResponse res, String s) throws IOException {
    // Commenting out the status code because we want the client to eval the error() call
    //res.setStatus(HttpServletResponse.SC_BAD_REQUEST);
    if (s != null && s.length() > 4096) { // Cap super long errors
        s = s.substring(0, 2048) + " ...[trimmed]... " + s.substring(s.length() - 2048);
    }/*w  ww .  j a v  a  2 s .  c  o m*/
    res.setContentType("x-marklogic/xquery; charset=UTF-8");
    Writer writer = res.getWriter();
    writer.write("error('" + escapeSingleQuotes(s) + "')");
    writer.flush();
}

From source file:MyServlet.java

public void doGet(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
    res.setContentType("text/plain");
    PrintWriter out = res.getWriter();

    res.setHeader("Refresh", "10");
    out.println(new Date().toString());
}