Example usage for org.apache.commons.vfs FileObject exists

List of usage examples for org.apache.commons.vfs FileObject exists

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Introduction

In this page you can find the example usage for org.apache.commons.vfs FileObject exists.

Prototype

public boolean exists() throws FileSystemException;

Source Link

Document

Determines if this file exists.

Usage

From source file:org.efaps.webdav4vfs.handler.GetHandler.java

@Override()
public void service(final HttpServletRequest _request, final HttpServletResponse _response) throws IOException {
    FileObject object = VFSBackend.resolveFile(_request.getPathInfo());

    if (object.exists()) {
        if (FileType.FOLDER.equals(object.getType())) {
            _response.sendError(HttpServletResponse.SC_FORBIDDEN);
            return;
        }//from  w w w. j av a 2s . c  om

        setHeader(_response, object.getContent());

        final InputStream is = object.getContent().getInputStream();
        final OutputStream os = _response.getOutputStream();
        IOUtils.copyLarge(is, os);
        is.close();
    } else {
        _response.sendError(HttpServletResponse.SC_NOT_FOUND);
    }
}

From source file:org.efaps.webdav4vfs.handler.HeadHandler.java

@Override()
public void service(final HttpServletRequest _request, final HttpServletResponse _response) throws IOException {
    FileObject object = VFSBackend.resolveFile(_request.getPathInfo());

    if (object.exists()) {
        if (FileType.FOLDER.equals(object.getType())) {
            _response.sendError(HttpServletResponse.SC_FORBIDDEN);
        } else {/*w w w  .j  a  v a 2s  .c o m*/
            setHeader(_response, object.getContent());
        }
    } else {
        _response.sendError(HttpServletResponse.SC_NOT_FOUND);
    }
}

From source file:org.efaps.webdav4vfs.handler.MkColHandler.java

@Override
public void service(HttpServletRequest request, HttpServletResponse response) throws IOException {
    BufferedReader bufferedReader = request.getReader();
    String line = bufferedReader.readLine();
    if (line != null) {
        response.sendError(HttpServletResponse.SC_UNSUPPORTED_MEDIA_TYPE);
        return;// w w  w.  j  a v  a 2s.  com
    }

    FileObject object = VFSBackend.resolveFile(request.getPathInfo());

    try {
        if (!LockManager.getInstance().evaluateCondition(object, getIf(request)).result) {
            response.sendError(HttpServletResponse.SC_PRECONDITION_FAILED);
            return;
        }
    } catch (LockException e) {
        response.sendError(SC_LOCKED);
        return;
    } catch (ParseException e) {
        response.sendError(HttpServletResponse.SC_PRECONDITION_FAILED);
        return;
    }

    if (object.exists()) {
        response.sendError(HttpServletResponse.SC_METHOD_NOT_ALLOWED);
        return;
    }

    if (!object.getParent().exists() || !FileType.FOLDER.equals(object.getParent().getType())) {
        response.sendError(HttpServletResponse.SC_CONFLICT);
        return;
    }

    try {
        object.createFolder();
        response.setStatus(HttpServletResponse.SC_CREATED);
    } catch (FileSystemException e) {
        response.sendError(HttpServletResponse.SC_FORBIDDEN);
    }
}

From source file:org.efaps.webdav4vfs.handler.OptionsHandler.java

@Override
public void service(HttpServletRequest request, HttpServletResponse response) throws IOException {
    response.setHeader("DAV", "1, 2");

    String path = request.getPathInfo();
    StringBuffer options = new StringBuffer();
    FileObject object = VFSBackend.resolveFile(path);
    if (object.exists()) {
        options.append("OPTIONS, GET, HEAD, POST, DELETE, TRACE, COPY, MOVE, LOCK, UNLOCK, PROPFIND");
        if (FileType.FOLDER.equals(object.getType())) {
            options.append(", PUT");
        }/*from w  w  w . j a va2 s.c om*/
    } else {
        options.append("OPTIONS, MKCOL, PUT, LOCK");
    }
    response.setHeader("Allow", options.toString());

    // see: http://www-128.ibm.com/developerworks/rational/library/2089.html
    response.setHeader("MS-Author-Via", "DAV");
}

From source file:org.efaps.webdav4vfs.handler.PropFindHandler.java

/**
 * Handle a PROPFIND request./*from w  w w  .java2  s .c o  m*/
 *
 * @param request  the servlet request
 * @param response the servlet response
 * @throws IOException if there is an error that cannot be handled normally
 */
@Override
public void service(HttpServletRequest request, HttpServletResponse response) throws IOException {
    SAXReader saxReader = new SAXReader();
    try {
        Document propDoc = saxReader.read(request.getInputStream());
        logXml(propDoc);

        Element propFindEl = propDoc.getRootElement();
        for (Object propElObject : propFindEl.elements()) {
            Element propEl = (Element) propElObject;
            if (VALID_PROPFIND_TAGS.contains(propEl.getName())) {
                FileObject object = VFSBackend.resolveFile(request.getPathInfo());
                if (object.exists()) {
                    // respond as XML encoded multi status
                    response.setContentType("text/xml");
                    response.setCharacterEncoding("UTF-8");
                    response.setStatus(SC_MULTI_STATUS);

                    Document multiStatusResponse = getMultiStatusResponse(object, propEl, getBaseUrl(request),
                            getDepth(request));
                    logXml(multiStatusResponse);

                    // write the actual response
                    XMLWriter writer = new XMLWriter(response.getWriter(), OutputFormat.createCompactFormat());
                    writer.write(multiStatusResponse);
                    writer.flush();
                    writer.close();

                } else {
                    response.sendError(HttpServletResponse.SC_NOT_FOUND);
                }
                break;
            }
        }
    } catch (DocumentException e) {
        LOG.error("invalid request: " + e.getMessage());
        response.sendError(HttpServletResponse.SC_BAD_REQUEST);
    }
}

From source file:org.efaps.webdav4vfs.handler.PropPatchHandler.java

/**
 * Handle a PROPPATCH request./*from w w  w.j a v  a2s  .  c  om*/
 *
 * @param request  the servlet request
 * @param response the servlet response
 * @throws IOException if there is an error that cannot be handled normally
 */
@Override
public void service(HttpServletRequest request, HttpServletResponse response) throws IOException {
    FileObject object = VFSBackend.resolveFile(request.getPathInfo());

    try {
        if (!LockManager.getInstance().evaluateCondition(object, getIf(request)).result) {
            response.sendError(HttpServletResponse.SC_PRECONDITION_FAILED);
            return;
        }
    } catch (LockException e) {
        response.sendError(SC_LOCKED);
        return;
    } catch (ParseException e) {
        response.sendError(HttpServletResponse.SC_PRECONDITION_FAILED);
        return;
    }

    if (object.exists()) {
        SAXReader saxReader = new SAXReader();
        try {
            Document propDoc = saxReader.read(request.getInputStream());
            logXml(propDoc);

            Element propUpdateEl = propDoc.getRootElement();
            List<Element> requestedProperties = new ArrayList<Element>();
            for (Object elObject : propUpdateEl.elements()) {
                Element el = (Element) elObject;
                String command = el.getName();
                if (AbstractDavResource.TAG_PROP_SET.equals(command)
                        || AbstractDavResource.TAG_PROP_REMOVE.equals(command)) {
                    for (Object propElObject : el.elements()) {
                        for (Object propNameElObject : ((Element) propElObject).elements()) {
                            Element propNameEl = (Element) propNameElObject;
                            requestedProperties.add(propNameEl);
                        }
                    }
                }
            }

            // respond as XML encoded multi status
            response.setContentType("text/xml");
            response.setCharacterEncoding("UTF-8");
            response.setStatus(SC_MULTI_STATUS);

            Document multiStatusResponse = getMultiStatusResponse(object, requestedProperties,
                    getBaseUrl(request));

            logXml(multiStatusResponse);

            // write the actual response
            XMLWriter writer = new XMLWriter(response.getWriter(), OutputFormat.createCompactFormat());
            writer.write(multiStatusResponse);
            writer.flush();
            writer.close();

        } catch (DocumentException e) {
            LOG.error("invalid request: " + e.getMessage());
            response.sendError(HttpServletResponse.SC_BAD_REQUEST);
        }
    } else {
        LOG.error(object.getName().getPath() + " NOT FOUND");
        response.sendError(HttpServletResponse.SC_NOT_FOUND);
    }
}

From source file:org.efaps.webdav4vfs.handler.PutHandler.java

@Override
public void service(HttpServletRequest request, HttpServletResponse response) throws IOException {
    FileObject object = VFSBackend.resolveFile(request.getPathInfo());

    try {/*  w  w w. j av  a 2 s. com*/
        if (!LockManager.getInstance().evaluateCondition(object, getIf(request)).result) {
            response.sendError(HttpServletResponse.SC_PRECONDITION_FAILED);
            return;
        }
    } catch (LockException e) {
        response.sendError(SC_LOCKED);
        return;
    } catch (ParseException e) {
        response.sendError(HttpServletResponse.SC_PRECONDITION_FAILED);
        return;
    }
    // it is forbidden to write data on a folder
    if (object.exists() && FileType.FOLDER.equals(object.getType())) {
        response.sendError(HttpServletResponse.SC_FORBIDDEN);
        return;
    }

    FileObject parent = object.getParent();
    if (!parent.exists()) {
        response.sendError(HttpServletResponse.SC_FORBIDDEN);
        return;
    }

    if (!FileType.FOLDER.equals(parent.getType())) {
        response.sendError(HttpServletResponse.SC_CONFLICT);
        return;
    }

    InputStream is = request.getInputStream();
    OutputStream os = object.getContent().getOutputStream();
    long bytesCopied = IOUtils.copyLarge(is, os);
    String contentLengthHeader = request.getHeader("Content-length");
    LOG.debug(String.format("sent %d/%s bytes", bytesCopied,
            contentLengthHeader == null ? "unknown" : contentLengthHeader));
    os.flush();
    object.close();

    response.setStatus(HttpServletResponse.SC_CREATED);
}

From source file:org.gatherdata.archiver.dao.vfs.internal.VfsArchiverDao.java

public boolean exists(URI uid) {
    boolean fileExists = false;
    try {/*from  w w  w.  j a v  a2s  .  c o m*/
        FileObject envelopeFile = fsManager.resolveFile(fsBase, uid.toASCIIString());
        fileExists = envelopeFile.exists();
    } catch (FileSystemException e) {
        e.printStackTrace();
    }
    return fileExists;
}

From source file:org.gatherdata.archiver.dao.vfs.internal.VfsArchiverDao.java

public GatherArchive retrieveEnvelope(URI uid) {
    GatherArchive foundEnvelope = null;// w  ww  .j  a v a  2s  . co  m
    try {
        FileObject envelopeFile = fsManager.resolveFile(fsBase, uid.toASCIIString());
        if (envelopeFile.exists()) {
            foundEnvelope = (GatherArchive) SerializationUtils
                    .deserialize(envelopeFile.getContent().getInputStream());
        }
    } catch (FileSystemException e) {
        e.printStackTrace();
    }
    return foundEnvelope;
}

From source file:org.gatherdata.archiver.dao.vfs.internal.VfsArchiverDao.java

public void remove(URI uid) {
    try {//from  w ww  . j a v a  2  s .c  om
        FileObject envelopeFile = fsManager.resolveFile(fsBase, uid.toASCIIString());
        if (envelopeFile.exists()) {
            envelopeFile.delete();
        }
    } catch (FileSystemException e) {
        e.printStackTrace();
    }
}