Example usage for javax.servlet ServletOutputStream write

List of usage examples for javax.servlet ServletOutputStream write

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Introduction

In this page you can find the example usage for javax.servlet ServletOutputStream write.

Prototype

public void write(byte b[], int off, int len) throws IOException

Source Link

Document

Writes len bytes from the specified byte array starting at offset off to this output stream.

Usage

From source file:org.wso2.carbon.registry.app.ResourceServlet.java

/**
 * Logic that will be executed for a get request.
 *
 * @param request  the HTTP Servlet request.
 * @param response the HTTP Servlet response.
 *
 * @throws IOException if an error occurred.
 *//* w  ww  .  jav a  2 s.c o  m*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
    try {
        String uri = request.getRequestURI();
        int idx = uri.indexOf("resource");
        String path = uri.substring(idx + 8);
        if (path == null) {
            String msg = "Could not get the resource content. Path is not specified.";
            log.error(msg);
            response.setStatus(HttpURLConnection.HTTP_BAD_REQUEST);
            return;
        }

        Resource resource;
        try {
            UserRegistry registry = Utils.getRegistry(request);
            try {
                path = new URI(path).normalize().toString();
            } catch (URISyntaxException e) {
                log.error("Unable to normalize requested resource path: " + path, e);
            }
            String decodedPath = URLDecoder.decode(path, RegistryConstants.DEFAULT_CHARSET_ENCODING);

            CurrentSession.setUserRealm(registry.getUserRealm());
            CurrentSession.setUser(registry.getUserName());
            try {
                if (!AuthorizationUtils.authorize(
                        RegistryUtils.getAbsolutePath(registry.getRegistryContext(), decodedPath),
                        ActionConstants.GET)) {
                    response.setStatus(HttpURLConnection.HTTP_UNAUTHORIZED);
                    response.setHeader("WWW-Authenticate", "Basic realm=\"WSO2-Registry\"");
                    return;
                }
                resource = registry.get(decodedPath);
            } finally {
                CurrentSession.removeUserRealm();
                CurrentSession.removeUser();
            }
        } catch (AuthorizationFailedException e) {
            log.error(e.getMessage());
            response.setStatus(HttpURLConnection.HTTP_UNAUTHORIZED);
            response.setHeader("WWW-Authenticate", "Basic realm=\"WSO2-Registry\"");
            return;
        } catch (RegistryException e) {
            String msg = "Error retrieving the resource " + path + ". " + e.getMessage();
            log.error(msg, e);
            throw e;
        }

        if (resource instanceof Collection) {
            String msg = "Could not get the resource content. Path " + path + " refers to a collection.";
            log.error(msg);
            response.setStatus(HttpURLConnection.HTTP_NOT_IMPLEMENTED);
            return;
        }

        // date based conditional get
        long ifModifiedSinceValue = request.getDateHeader("If-Modified-Since");
        long lastModifiedValue = resource.getLastModified().getTime();
        if (ifModifiedSinceValue > 0) {
            // convert the time values from milliseconds to seconds
            ifModifiedSinceValue /= 1000;
            lastModifiedValue /= 1000;

            /* condition to check we have latest updates in terms of dates */
            if (ifModifiedSinceValue >= lastModifiedValue) {
                /* no need to response with data */
                response.setStatus(HttpURLConnection.HTTP_NOT_MODIFIED);
                return;
            }
        }
        response.setDateHeader("Last-Modified", lastModifiedValue);

        // eTag based conditional get
        String ifNonMatchValue = request.getHeader("if-none-match");
        String currentETag = Utils.calculateEntityTag(resource);
        if (ifNonMatchValue != null) {
            if (ifNonMatchValue.equals(currentETag)) {
                /* the version is not modified */
                response.setStatus(HttpURLConnection.HTTP_NOT_MODIFIED);
                return;
            }
        }
        response.setHeader("ETag", currentETag);

        if (resource.getMediaType() != null && resource.getMediaType().length() > 0) {
            response.setContentType(resource.getMediaType());
        } else {
            response.setHeader("Content-Disposition",
                    "attachment; filename=" + RegistryUtils.getResourceName(path));
            response.setContentType("application/download");
        }

        InputStream contentStream = null;
        if (resource.getContent() != null) {
            contentStream = resource.getContentStream();
        }
        if (contentStream != null) {

            try {
                ServletOutputStream servletOutputStream = response.getOutputStream();
                byte[] contentChunk = new byte[RegistryConstants.DEFAULT_BUFFER_SIZE];
                int byteCount;
                while ((byteCount = contentStream.read(contentChunk)) != -1) {
                    servletOutputStream.write(contentChunk, 0, byteCount);
                }

                response.flushBuffer();
                servletOutputStream.flush();

            } finally {
                contentStream.close();
            }

        } else {
            Object content = resource.getContent();
            if (content != null) {

                if (content instanceof byte[]) {
                    ServletOutputStream servletOutputStream = response.getOutputStream();
                    servletOutputStream.write((byte[]) content);
                    response.flushBuffer();
                    servletOutputStream.flush();
                } else {
                    PrintWriter writer = response.getWriter();
                    writer.write(content.toString());
                    writer.flush();
                }
            }
        }

        resource.discard();

    } catch (RegistryException e) {
        String msg = "Failed to get resource content. " + e.getMessage();
        log.error(msg, e);
        response.setStatus(HttpURLConnection.HTTP_INTERNAL_ERROR);
    }
}

From source file:net.nan21.dnet.core.web.controller.AbstractDnetController.java

protected void sendFile(InputStream inputStream, ServletOutputStream outputStream, int bufferSize)
        throws IOException {
    try {/*from  w w  w.  j av  a2  s  .co  m*/
        byte[] buf = new byte[bufferSize];
        int bytesRead;
        while ((bytesRead = inputStream.read(buf)) != -1) {
            outputStream.write(buf, 0, bytesRead);
        }
    } finally {
        if (inputStream != null)
            inputStream.close();
    }
    outputStream.flush();
}

From source file:com.all.tracker.controllers.VersionController.java

private void sendFile(File updateFile, ServletOutputStream outputStream) throws Exception {
    FileInputStream fis = null;//from   w w  w. ja  v  a 2  s .c o  m
    try {

        byte[] readBytes = new byte[1024 * 4];
        int amountBytesRead;
        fis = fileInputStreamFactory.create(updateFile);

        while ((amountBytesRead = fis.read(readBytes)) != -1) {
            outputStream.write(readBytes, 0, amountBytesRead);
        }

    } catch (Exception e) {
        throw e;
    } finally {
        if (fis != null) {
            try {
                fis.close();
            } catch (IOException e) {
                // ignore
            }
        }
        try {
            outputStream.close();
        } catch (IOException e) {
            // ignore
        }
        fis = null;
        outputStream = null;
    }
}

From source file:eu.europa.ec.eci.oct.webcommons.controller.fileserving.FileServingController.java

@RequestMapping(method = RequestMethod.GET)
protected void doGet(Model model, HttpServletRequest request, HttpServletResponse response)
        throws OCTException {
    ServedFile file;/*from ww w .j  a va  2s.com*/
    try {
        file = getFile(request, response);
    } catch (RequestHandledTransparentlyException re) {
        // we have already redirected, no need to proceed
        return;
    }

    ServletOutputStream out;
    InputStream in = null;
    try {
        out = response.getOutputStream();
        in = file.getIs();

        String mimeType = file.getContentType();
        response.setContentType(mimeType);
        if (file.isAttachment()) {
            response.setHeader("Content-Disposition", "attachment; filename=\"" + file.getFileName() + "\"");
        }

        final byte[] bytes = new byte[FILEBUFFERSIZE];
        int bytesRead;
        while ((bytesRead = in.read(bytes)) != -1) {
            out.write(bytes, 0, bytesRead);
        }

    } catch (IOException e) {
        logger.error("I/O exception occured", e);
        throw new OCTException("I/O exception occured", e);
    } finally {
        if (in != null) {
            try {
                in.close();
            } catch (IOException e) {
                logger.warn("I/O exception occured while closing input stream", e);
                logger.warn("... will continue anyway");
            }
        }
    }
}

From source file:sys.core.manager.RecursosManager.java

public void viewArchivo(String archivo) {
    FacesContext context = FacesContext.getCurrentInstance();
    HttpServletResponse response = (HttpServletResponse) context.getExternalContext().getResponse();
    response.setContentType("application/force-download");
    response.addHeader("Content-Disposition", "attachment; filename=\"" + archivo + "\"");
    ApplicationMBean applicationMBean = (ApplicationMBean) WebServletContextListener.getApplicationContext()
            .getBean("applicationMBean");
    byte[] buf = new byte[1024];
    try {/*  w w  w  .  ja  v  a2s .  co  m*/
        File file = new File(applicationMBean.getRutaArchivos() + archivo);
        long length = file.length();
        BufferedInputStream in = new BufferedInputStream(new FileInputStream(file));
        ServletOutputStream out = response.getOutputStream();
        response.setContentLength((int) length);
        while ((in != null) && ((length = in.read(buf)) != -1)) {
            out.write(buf, 0, (int) length);
        }
        in.close();
        out.close();
    } catch (Exception exc) {
        logger.error(exc);
    }
}

From source file:psef.handler.ProjectGetHandler.java

public void handle(HttpServletRequest request, HttpServletResponse response, String urn) throws PsefException {
    //1. get the project metadata
    try {//from   w w  w  .j a  v a 2  s.co  m
        Connection conn = Connector.getConnection();
        docid = request.getParameter(Params.DOCID);
        if (docid == null || docid.length() == 0)
            throw new PsefException("Missing docid");
        String project = conn.getFromDb(Database.PROJECTS, docid);
        JSONObject jObj = (JSONObject) JSONValue.parse(project);
        String site_url = (String) jObj.get(JSONKeys.SITE_URL);
        // 2. create the temporary directory
        if (site_url != null) {
            File tempDir = new File(System.getProperty("java.io.tmpdir"));
            URL siteU = new URL(site_url);
            root = new File(tempDir, getLastPart(siteU));
            if (!root.exists())
                root.mkdir();
            URL current = new URL(site_url);
            String path = urlDiff(siteU, current);
            // 2. get the home page and parse it
            writeUrlContents(site_url, path);
            File archive = tarRoot();
            response.setContentType("application/gzip");
            ServletOutputStream sos = response.getOutputStream();
            byte[] buffer = new byte[BUF_SIZE];
            FileInputStream fis = new FileInputStream(archive);
            BufferedInputStream bis = new BufferedInputStream(fis, BUF_SIZE);
            while (bis.available() > 0) {
                int amt = bis.available();
                amt = (amt > BUF_SIZE) ? BUF_SIZE : amt;
                bis.read(buffer, 0, amt);
                sos.write(buffer, 0, amt);
            }
        } else
            throw new Exception("project doesn't have a site_url");
    } catch (Exception e) {
        throw new PsefException(e);
    }
}

From source file:net.nan21.dnet.core.web.controller.AbstractDnetController.java

protected void sendFile(File file, ServletOutputStream outputStream, int bufferSize) throws IOException {
    InputStream in = null;/*www. j a  v  a  2  s .co m*/
    try {
        in = new BufferedInputStream(new FileInputStream(file));
        byte[] buf = new byte[bufferSize];
        int bytesRead;
        while ((bytesRead = in.read(buf)) != -1) {
            outputStream.write(buf, 0, bytesRead);
        }
    } finally {
        if (in != null)
            in.close();
    }
    outputStream.flush();
}

From source file:edu.umn.cs.spatialHadoop.nasa.ShahedServer.java

/**
 * Tries to load the given resource name frmo class path if it exists.
 * Used to serve static files such as HTML pages, images and JavaScript files.
 * @param target/*  w  ww  . j a  va  2s  . c o m*/
 * @param response
 * @throws IOException
 */
private void tryToLoadStaticResource(String target, HttpServletResponse response) throws IOException {
    LOG.info("Loading resource " + target);
    // Try to load this resource as a static page
    InputStream resource = getClass().getResourceAsStream("/webapps/static/shahedfrontend" + target);
    if (resource == null) {
        reportError(response, "Cannot load resource '" + target + "'", null);
        return;
    }
    byte[] buffer = new byte[1024 * 1024];
    ServletOutputStream outResponse = response.getOutputStream();
    int size;
    while ((size = resource.read(buffer)) != -1) {
        outResponse.write(buffer, 0, size);
    }
    resource.close();
    outResponse.close();
    response.setStatus(HttpServletResponse.SC_OK);
    if (target.endsWith(".js")) {
        response.setContentType("application/javascript");
    } else if (target.endsWith(".css")) {
        response.setContentType("text/css");
    } else {
        response.setContentType(URLConnection.guessContentTypeFromName(target));
    }
    final DateFormat format = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss ZZZ");
    final long year = 1000L * 60 * 60 * 24 * 365;
    // Expires in a year
    response.addHeader("Expires", format.format(new Date().getTime() + year));
}

From source file:edu.umn.cs.spatialHadoop.visualization.HadoopvizServer.java

/**
 * Tries to load the given resource name frmo class path if it exists. Used to
 * serve static files such as HTML pages, images and JavaScript files.
 * //from  w w w.jav  a2 s .  co  m
 * @param target
 * @param response
 * @throws IOException
 */
private void tryToLoadStaticResource(String target, HttpServletResponse response) throws IOException {
    LOG.info("Loading resource " + target);
    // Try to load this resource as a static page
    InputStream resource = getClass().getResourceAsStream("/webapps/static/hadoopviz" + target);
    if (resource == null) {
        reportError(response, "Cannot load resource '" + target + "'", null);
        return;
    }
    byte[] buffer = new byte[1024 * 1024];
    ServletOutputStream outResponse = response.getOutputStream();
    int size;
    while ((size = resource.read(buffer)) != -1) {
        outResponse.write(buffer, 0, size);
    }
    resource.close();
    outResponse.close();
    response.setStatus(HttpServletResponse.SC_OK);
    if (target.endsWith(".js")) {
        response.setContentType("application/javascript");
    } else if (target.endsWith(".css")) {
        response.setContentType("text/css");
    } else {
        response.setContentType(URLConnection.guessContentTypeFromName(target));
    }
}