protected void doDSGet(Context context, HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException, SQLException, AuthorizeException {
ExternalIdentifierDAO identifierDAO = ExternalIdentifierDAOFactory.getInstance(context);
Item item = null;
Bitstream bitstream = null;
String idString = request.getPathInfo();
String filenameNoPath = null;
String fullpath = null;
String uri = null;
// Parse URL
if (idString != null) {
// Remove leading slash
if (idString.startsWith("/")) {
idString = idString.substring(1);
}
// Get uri and full file path
int slashIndex = idString.indexOf('/');
if (slashIndex != -1) {
slashIndex = idString.indexOf('/', slashIndex + 1);
if (slashIndex != -1) {
uri = idString.substring(0, slashIndex);
fullpath =
URLDecoder.decode(idString.substring(slashIndex + 1), Constants.DEFAULT_ENCODING);
// Get filename with no path
slashIndex = fullpath.indexOf('/');
if (slashIndex != -1) {
String[] pathComponents = fullpath.split("/");
if (pathComponents.length <= maxDepthGuess + 1) {
filenameNoPath = pathComponents[pathComponents.length - 1];
}
}
}
}
}
if (uri != null && fullpath != null) {
// Find the item
try {
/*
* If the original item doesn't have a persistent identifier
* yet (because it's in the workflow) what we actually have is
* a URL of the form: db-id/1234 where 1234 is the database ID
* of the item.
*
* FIXME: This first part could be totally omitted now that we
* have the dsi:x/y format of identification.
*/
if (uri.startsWith("db-id")) {
String dbIDString = uri.substring(uri.indexOf('/') + 1);
int dbID = Integer.parseInt(dbIDString);
item = ItemDAOFactory.getInstance(context).retrieve(dbID);
} else {
ExternalIdentifier identifier = identifierDAO.retrieve(uri);
ObjectIdentifier oi = identifier.getObjectIdentifier();
item = (Item) oi.getObject(context);
}
} catch (NumberFormatException nfe) {
// Invalid ID - this will be dealt with below
}
}
if (item != null) {
// Try to find bitstream with exactly matching name + path
bitstream = getItemBitstreamByName(item, fullpath);
if (bitstream == null && filenameNoPath != null) {
// No match with the full path, but we can try again with
// only the filename
bitstream = getItemBitstreamByName(item, filenameNoPath);
}
}
// Did we get a bitstream?
if (bitstream != null) {
log.info(
LogManager.getHeader(
context, "view_html", "uri=" + uri + ",bitstream_id=" + bitstream.getID()));
// Set the response MIME type
response.setContentType(bitstream.getFormat().getMIMEType());
// Response length
response.setHeader("Content-Length", String.valueOf(bitstream.getSize()));
// Pipe the bits
InputStream is = bitstream.retrieve();
Utils.bufferedCopy(is, response.getOutputStream());
is.close();
response.getOutputStream().flush();
} else {
// No bitstream - we got an invalid ID
log.info(LogManager.getHeader(context, "view_html", "invalid_bitstream_id=" + idString));
JSPManager.showInvalidIDError(request, response, idString, Constants.BITSTREAM);
}
}
public void processDSpaceObject(
Context context,
HttpServletRequest request,
HttpServletResponse response,
DSpaceObject dso,
String extraPathInfo)
throws ServletException, IOException, SQLException, AuthorizeException {
// OK, we have a valid URI. What is it?
if (dso.getType() == Constants.BITSTREAM) {
// FIXME: Check for if-modified-since header
Bitstream bitstream = (Bitstream) dso;
log.info(
LogManager.getHeader(context, "view_bitstream", "bitstream_id=" + bitstream.getID()));
// Pipe the bits
// InputStream is = bitstream.retrieve();
InputStream is = BitstreamStorageManager.retrieve(context, bitstream);
// Set the response MIME type
response.setContentType(bitstream.getFormat().getMIMEType());
response.setHeader("Content-Length", String.valueOf(bitstream.getSize()));
response.setHeader("Content-disposition", "attachment; filename=" + bitstream.getName());
Utils.bufferedCopy(is, response.getOutputStream());
is.close();
response.getOutputStream().flush();
} else if (dso.getType() == Constants.ITEM) {
Item item = (Item) dso;
response.setDateHeader("Last-Modified", item.getLastModified().getTime());
// Check for if-modified-since header
long modSince = request.getDateHeader("If-Modified-Since");
if (modSince != -1 && item.getLastModified().getTime() < modSince) {
// Item has not been modified since requested date,
// hence bitstream has not; return 304
response.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
} else {
// Display the item page
displayItem(context, request, response, item);
}
} else if (dso.getType() == Constants.COLLECTION) {
Collection c = (Collection) dso;
// Store collection location in request
request.setAttribute("dspace.collection", c);
/*
* Find the "parent" community the collection, mainly for
* "breadcrumbs" FIXME: At the moment, just grab the first community
* the collection is in. This should probably be more context
* sensitive when we have multiple inclusion.
*/
Community[] parents = (Community[]) c.getCommunities().toArray();
request.setAttribute("dspace.community", parents[0]);
/*
* Find all the "parent" communities for the collection for
* "breadcrumbs"
*/
request.setAttribute("dspace.communities", getParents(parents[0], true));
// home page, or forward to another page?
if ((extraPathInfo == null) || (extraPathInfo.equals("/"))) {
collectionHome(context, request, response, parents[0], c);
} else {
// Forward to another servlet
request.getRequestDispatcher(extraPathInfo).forward(request, response);
}
} else if (dso.getType() == Constants.COMMUNITY) {
Community c = (Community) dso;
// Store collection location in request
request.setAttribute("dspace.community", c);
/*
* Find all the "parent" communities for the community
*/
request.setAttribute("dspace.communities", getParents(c, false));
// home page, or forward to another page?
if ((extraPathInfo == null) || (extraPathInfo.equals("/"))) {
communityHome(context, request, response, c);
} else {
// Forward to another servlet
request.getRequestDispatcher(extraPathInfo).forward(request, response);
}
} else {
// Shouldn't happen. Log and treat as invalid ID
log.info(
LogManager.getHeader(
context,
"URI not an item, collection or community",
"identifier=" + dso.getIdentifier().toString()));
JSPManager.showInvalidIDError(request, response, request.getPathInfo(), -1);
return;
}
}
@Override
protected void doDSGet(Context context, HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException, SQLException, AuthorizeException {
Item item = null;
Bitstream bitstream = null;
// Get the ID from the URL
String idString = request.getPathInfo();
String handle = "";
String sequenceText = "";
String filename = null;
int sequenceID;
// Parse 'handle' and 'sequence' (bitstream seq. number) out
// of remaining URL path, which is typically of the format:
// {handle}/{sequence}/{bitstream-name}
// But since the bitstream name MAY have any number of "/"s in
// it, and the handle is guaranteed to have one slash, we
// scan from the start to pick out handle and sequence:
// Remove leading slash if any:
if (idString.startsWith("/")) {
idString = idString.substring(1);
}
// skip first slash within handle
int slashIndex = idString.indexOf('/');
if (slashIndex != -1) {
slashIndex = idString.indexOf('/', slashIndex + 1);
if (slashIndex != -1) {
handle = idString.substring(0, slashIndex);
int slash2 = idString.indexOf('/', slashIndex + 1);
if (slash2 != -1) {
sequenceText = idString.substring(slashIndex + 1, slash2);
filename = idString.substring(slash2 + 1);
}
}
}
try {
sequenceID = Integer.parseInt(sequenceText);
} catch (NumberFormatException nfe) {
sequenceID = -1;
}
// Now try and retrieve the item
DSpaceObject dso = HandleManager.resolveToObject(context, handle);
// Make sure we have valid item and sequence number
if (dso != null && dso.getType() == Constants.ITEM && sequenceID >= 0) {
item = (Item) dso;
if (item.isWithdrawn()) {
log.info(
LogManager.getHeader(
context, "view_bitstream", "handle=" + handle + ",withdrawn=true"));
JSPManager.showJSP(request, response, "/tombstone.jsp");
return;
}
boolean found = false;
Bundle[] bundles = item.getBundles();
for (int i = 0; (i < bundles.length) && !found; i++) {
Bitstream[] bitstreams = bundles[i].getBitstreams();
for (int k = 0; (k < bitstreams.length) && !found; k++) {
if (sequenceID == bitstreams[k].getSequenceID()) {
bitstream = bitstreams[k];
found = true;
}
}
}
}
if (bitstream == null || filename == null || !filename.equals(bitstream.getName())) {
// No bitstream found or filename was wrong -- ID invalid
log.info(LogManager.getHeader(context, "invalid_id", "path=" + idString));
JSPManager.showInvalidIDError(request, response, idString, Constants.BITSTREAM);
return;
}
log.info(LogManager.getHeader(context, "view_bitstream", "bitstream_id=" + bitstream.getID()));
// Modification date
// Only use last-modified if this is an anonymous access
// - caching content that may be generated under authorisation
// is a security problem
if (context.getCurrentUser() == null) {
// TODO: Currently the date of the item, since we don't have dates
// for files
response.setDateHeader("Last-Modified", item.getLastModified().getTime());
// Check for if-modified-since header
long modSince = request.getDateHeader("If-Modified-Since");
if (modSince != -1 && item.getLastModified().getTime() < modSince) {
// Item has not been modified since requested date,
// hence bitstream has not; return 304
response.setStatus(HttpServletResponse.SC_NOT_MODIFIED);
return;
}
}
// Pipe the bits
InputStream is = bitstream.retrieve();
// Set the response MIME type
response.setContentType(bitstream.getFormat().getMIMEType());
// Response length
response.setHeader("Content-Length", String.valueOf(bitstream.getSize()));
if (threshold != -1 && bitstream.getSize() >= threshold) {
setBitstreamDisposition(bitstream.getName(), request, response);
}
Utils.bufferedCopy(is, response.getOutputStream());
is.close();
response.getOutputStream().flush();
}
