Examples with ImageOpException digilib.image.ImageOpException used on opensource projects

Example 1 with ImageOpException

use of digilib.image.ImageOpException in project digilib by robcast.

the class ServletOps method sendFile.

/**
 * Transfers an image file as-is with the mime type mt.
 *
 * The local file is copied to the <code>OutputStream</code> of the
 * <code>ServletResponse</code>. If mt is null then the mime-type is
 * auto-detected with mimeForFile.
 *
 * @param f
 *            Image file to be sent.
 * @param mt
 *            mime-type of the file.
 * @param name
 *            name of the download file (for application/x)
 * @param res
 *            ServletResponse where the image file will be sent.
 * @param logger
 *            Logger to use
 * @throws ImageOpException
 * @throws ServletException Exception on sending data.
 * @throws IOException
 */
public static void sendFile(File f, String mt, String name, HttpServletResponse response, Logger logger) throws ImageOpException, IOException {
    logger.debug("sendRawFile(" + mt + ", " + f + ")");
    if (response == null) {
        logger.error("No response!");
        return;
    }
    /*
         * set content-type
         */
    if (mt == null) {
        // auto-detect mime-type
        mt = FileOps.mimeForFile(f);
        if (mt == null) {
            throw new ImageOpException("Unknown file type.");
        }
    }
    if (!mt.isEmpty()) {
        response.setContentType(mt);
    }
    /*
         * set content-disposition with filename unless name="".
         */
    if (name == null) {
        // no download name -- use filename
        name = f.getName();
    }
    if (!name.isEmpty()) {
        if (mt.startsWith("application")) {
            response.addHeader("Content-Disposition", "attachment; filename=\"" + name + "\"");
        } else {
            response.addHeader("Content-Disposition", "inline; filename=\"" + name + "\"");
        }
    }
    /*
         * set CORS header ACAO "*" for image or info response
         */
    if (corsForImageRequests && !mt.isEmpty()) {
        // TODO: would be nice to check request for Origin header
        response.setHeader("Access-Control-Allow-Origin", "*");
    }
    /*
         * open file
         */
    FileInputStream inFile = null;
    try {
        inFile = new FileInputStream(f);
        OutputStream outStream = response.getOutputStream();
        // TODO: should we set content length?
        // see http://www.prozesse-und-systeme.de/servletFlush.html
        response.setContentLength((int) f.length());
        byte[] dataBuffer = new byte[4096];
        int len;
        /*
             * write file to stream
             */
        while ((len = inFile.read(dataBuffer)) != -1) {
            // copy out file
            outStream.write(dataBuffer, 0, len);
        }
    } finally {
        try {
            if (inFile != null) {
                inFile.close();
            }
        } catch (IOException e) {
        // nothing to do
        }
    }
}

Example 2 with ImageOpException

use of digilib.image.ImageOpException in project digilib by robcast.

the class ScalerNoThread method processRequest.

/**
 * Service this request using the response.
 *
 * @param request
 * @param response
 * @throws ServletException
 */
public void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException {
    if (dlConfig == null) {
        logger.error("ERROR: No Configuration!");
        throw new ServletException("NO VALID digilib CONFIGURATION!");
    }
    accountlog.debug("request: " + request.getQueryString());
    logger.debug("request: " + request.getQueryString());
    long startTime = System.currentTimeMillis();
    // parse request
    DigilibServletRequest dlRequest = new DigilibServletRequest(request, dlConfig);
    // type of error reporting
    ErrMsg errMsgType = ErrMsg.IMAGE;
    if (dlRequest.hasOption(DigilibOption.errtxt)) {
        errMsgType = ErrMsg.TEXT;
    } else if (dlRequest.hasOption(DigilibOption.errcode)) {
        errMsgType = ErrMsg.CODE;
    }
    try {
        // extract the job information
        ImageJobDescription jobTicket = ImageJobDescription.getInstance(dlRequest, dlConfig);
        /*
             * check if we can fast-track without scaling
             */
        ImageInput fileToLoad = (ImageInput) jobTicket.getInput();
        // check permissions
        if (useAuthorization) {
            // is the current request/user authorized?
            if (!authzOp.isAuthorized(dlRequest)) {
                // send deny answer and abort
                throw new AuthOpException();
            }
        }
        // if requested, send image as a file
        if (sendFileAllowed && jobTicket.getSendAsFile()) {
            String mt = null;
            if (jobTicket.hasOption(DigilibOption.rawfile)) {
                mt = "application/octet-stream";
            }
            logger.debug("Sending RAW File as is.");
            ServletOps.sendFile(fileToLoad.getFile(), mt, null, response, logger);
            logger.info("Done in " + (System.currentTimeMillis() - startTime) + "ms");
            return;
        }
        // it
        if (!jobTicket.isTransformRequired()) {
            logger.debug("Sending File as is.");
            ServletOps.sendFile(fileToLoad.getFile(), null, null, response, logger);
            logger.info("Done in " + (System.currentTimeMillis() - startTime) + "ms");
            return;
        }
        // create job
        ImageWorker job = new ImageWorker(dlConfig, jobTicket);
        // get result immediately
        DocuImage img = job.call();
        // forced destination image type
        String mt = null;
        if (jobTicket.hasOption(DigilibOption.jpg)) {
            mt = "image/jpeg";
        } else if (jobTicket.hasOption(DigilibOption.png)) {
            mt = "image/png";
        }
        // send image
        ServletOps.sendImage(img, mt, response, logger);
        logger.debug("Job Processing Time: " + (System.currentTimeMillis() - startTime) + "ms");
    } catch (ImageOpException e) {
        logger.error(e.getClass() + ": " + e.getMessage());
        digilibError(errMsgType, Error.IMAGE, null, response);
    } catch (IOException e) {
        logger.error(e.getClass() + ": " + e.getMessage());
        digilibError(errMsgType, Error.FILE, null, response);
    } catch (AuthOpException e) {
        logger.error(e.getClass() + ": " + e.getMessage());
        digilibError(errMsgType, Error.AUTH, null, response);
    }
}

Example 3 with ImageOpException

use of digilib.image.ImageOpException in project digilib by robcast.

the class AsyncServletWorker method run.

/**
 * runs the ImageWorker and writes the image to the ServletResponse.
 */
@Override
public void run() {
    try {
        /*
             * render the image
             */
        DocuImage img = imageWorker.call();
        if (completed) {
            logger.debug("AsyncServletWorker already completed (after scaling)!");
            return;
        }
        /*
             * set forced destination image type
             */
        String mt = null;
        if (jobinfo.hasOption(DigilibOption.jpg)) {
            mt = "image/jpeg";
        } else if (jobinfo.hasOption(DigilibOption.png)) {
            mt = "image/png";
        }
        /*
             *  send the image
             */
        HttpServletResponse response = (HttpServletResponse) asyncContext.getResponse();
        ServletOps.sendImage(img, mt, response, logger);
        logger.debug("Job done in: " + (System.currentTimeMillis() - startTime) + "ms");
    } catch (ImageOpException e) {
        logger.error(e.getClass() + ": " + e.getMessage());
        Scaler.digilibError(errMsgType, Error.IMAGE, null, (HttpServletResponse) asyncContext.getResponse());
    } catch (IOException e) {
        logger.error(e.getClass() + ": " + e.getMessage());
        Scaler.digilibError(errMsgType, Error.FILE, null, (HttpServletResponse) asyncContext.getResponse());
    } catch (ServletException e) {
        logger.error("Servlet error: ", e);
    } catch (Exception e) {
        logger.error("Other error: ", e);
    } finally {
        if (completed) {
            logger.debug("AsyncServletWorker already completed (finally)!");
        } else {
            // submit response
            logger.debug("context complete.");
            completed = true;
            asyncContext.complete();
        }
    }
}

Example 4 with ImageOpException

use of digilib.image.ImageOpException in project digilib by robcast.

the class Manifester method processRequest.

protected void processRequest(HttpServletRequest request, HttpServletResponse response) {
    try {
        // create DigilibRequest from ServletRequest, omit IIIF Image API parsing
        DigilibServletRequest dlRequest = new DigilibServletRequest(request, dlConfig, EnumSet.of(ParsingOption.omitIiifImageApi));
        // get list of IIIF parameters
        @SuppressWarnings("unchecked") List<String> iiifParams = (List<String>) dlRequest.getValue("request.iiif.elements");
        if (iiifParams == null) {
            logger.error("Invalid IIIF request.");
            response.sendError(HttpServletResponse.SC_BAD_REQUEST, "Invalid IIIF request.");
            return;
        }
        // get identifier (first parameter)
        // allow empty identifier for image root dir
        String identifier = "";
        if (iiifParams.size() > 0) {
            identifier = iiifParams.get(0);
        }
        // decode identifier to file path
        dlRequest.setValueFromString("fn", dlRequest.decodeIiifIdentifier(identifier));
        // get directory path
        String dlFn = dlRequest.getFilePath();
        // get information about the directory
        DocuDirectory dlDir = dirCache.getDirectory(dlFn);
        if (dlDir == null) {
            logger.error("Directory for manifest not found: " + dlFn);
            response.sendError(HttpServletResponse.SC_NOT_FOUND);
            return;
        }
        // check for existing manifest file
        File mfFile = new File(dlDir.getDir(), "manifest.json");
        // check for image files
        if ((dlDir.size() == 0) && !mfFile.canRead()) {
            logger.debug("Directory has no files: " + dlFn);
            response.sendError(HttpServletResponse.SC_NOT_FOUND);
            return;
        }
        ManifestParams params = new ManifestParams();
        /*
			 * set CORS header ACAO "*" for info response as per IIIF spec
			 */
        if (corsForInfoRequests) {
            String origin = request.getHeader("Origin");
            if (origin != null) {
                response.setHeader("Access-Control-Allow-Origin", "*");
            }
        }
        /*
             * check permissions
             */
        if (useAuthorization) {
            // is the current request/user authorized?
            if (!authzOp.isAuthorized(dlRequest)) {
                // send deny answer and abort
                throw new AuthOpException("Access denied!");
            }
        }
        // use JSON-LD content type only when asked
        String accept = request.getHeader("Accept");
        if (accept != null && accept.contains("application/ld+json")) {
            response.setContentType("application/ld+json");
        } else {
            response.setContentType("application/json");
        }
        if (mfFile.canRead()) {
            // send manifest file
            ServletOps.sendFile(mfFile, "", "", response);
            return;
        }
        // check for manifest-meta.json file with additional metadata
        File mfMetaFile = new File(dlDir.getDir(), "manifest-meta.json");
        if (mfMetaFile.canRead()) {
            params.mfMetaFile = mfMetaFile;
        }
        /*
			 * configure base URLs for manifest
			 */
        params.imgApiUrl = dlConfig.getAsString("iiif-image-base-url");
        String manifestBaseUrl = dlConfig.getAsString("iiif-manifest-base-url");
        if ("".equals(params.imgApiUrl) || "".equals(manifestBaseUrl)) {
            // try to figure out base URLs
            String servletBaseUrl = dlConfig.getAsString("webapp-base-url");
            if ("".equals(servletBaseUrl)) {
                String url = request.getRequestURL().toString();
                // get base URL for web application by last occurrence of Servlet path
                int srvPathLen = url.lastIndexOf(request.getServletPath());
                servletBaseUrl = url.substring(0, srvPathLen);
            }
            // manifest base URL
            manifestBaseUrl = servletBaseUrl + request.getServletPath() + "/" + dlConfig.getAsString("iiif-prefix");
            // Image API base URL
            params.imgApiUrl = servletBaseUrl + "/" + this.scalerServletPath + "/" + dlConfig.getAsString("iiif-prefix");
        }
        // full manifest URL with identifier
        params.manifestUrl = manifestBaseUrl + "/" + identifier;
        params.identifier = identifier;
        params.docuDir = dlDir;
        /*
			 * start json representation
			 */
        ServletOutputStream out = response.getOutputStream();
        JsonGenerator manifest = Json.createGenerator(out).writeStartObject();
        /*
			 * manifest metadata
			 */
        writeManifestMeta(manifest, dlFn, params);
        /*
			 * sequences
			 */
        writeSequences(manifest, params);
        // manifest
        manifest.writeEnd();
        manifest.close();
    } catch (IOException e) {
        logger.error("ERROR sending manifest: ", e);
    } catch (ImageOpException e) {
        logger.error("ERROR sending manifest: ", e);
    } catch (AuthOpException e) {
        logger.debug("Permission denied.");
        try {
            response.sendError(HttpServletResponse.SC_FORBIDDEN);
        } catch (IOException e1) {
            logger.error("Error sending error: ", e);
        }
    }
}

Example 5 with ImageOpException

use of digilib.image.ImageOpException in project digilib by robcast.

the class PDFStreamWorker method addTitlePage.

/**
 * Create a title page and append it to the document (should, of course, be
 * called first)
 *
 * @throws DocumentException
 */
public Document addTitlePage(Document doc) throws DocumentException {
    PDFTitlePage titlepage = new PDFTitlePage(job_info);
    try {
        doc.add(titlepage.getPageContents());
    } catch (IOException e) {
        throw new DocumentException(e);
    } catch (ImageOpException e) {
        throw new DocumentException(e);
    }
    doc.newPage();
    return doc;
}