/**
* Create URI as string for a given handle and optional bitstream. URI is relative to top of DAV
* hierarchy, but starts with '/'.
*
* @param handle handle of a DSpace object (Item, Collection, etc)
* @param bsPid bitstream persistent identifier.
* @return "absolute" URI from top of DAV hierarchy
* @throws IOException Signals that an I/O exception has occurred.
* @throws SQLException the SQL exception
*/
protected String makeURI(String handle, String bsPid) throws IOException, SQLException {
try {
ResolvableIdentifier dsi = IdentifierService.resolve(context, handle);
DSpaceObject dso = (DSpaceObject) IdentifierService.getResource(context, dsi);
if (dso == null) {
return null;
}
return makeURI(dso, bsPid);
} catch (IdentifierException e) {
log.error("caught exception: ", e);
throw new RuntimeException(e);
}
}
/**
* Send a redirect (302) response to client with DAV URL of the resource for this handle and/or
* bitstream. Puts URL in the <code>Location:</code> header.
*
* @return URL in string form for desired DAV resource.
* @throws IOException Signals that an I/O exception has occurred.
* @throws SQLException the SQL exception
* @throws DAVStatusException the DAV status exception
* @throw IOException
* @throw SQLException
*/
private void doRedirect() throws IOException, SQLException, DAVStatusException {
try {
DSpaceObject dso = null;
String bsPid = null;
/*
* FIXME: (maybe?) NOTE: This is currently hard-wired to accomodate the
* syntax of Handles, with "prefix/suffix" separated by the slash --
* that means the Handle probably takes up multiple path elements,
* unless the client escaped the '/'. This code *might* need adjusting
* if we allow other kinds of persistent identifiers for DSpace objects.
*/
int hdlStart = -1;
if (this.pathElt.length > 2 && this.pathElt[1].equals("handle")) {
hdlStart = 2;
} else if (this.pathElt.length > 3 && this.pathElt[1].equals("bitstream-handle")) {
bsPid = this.pathElt[2];
hdlStart = 3;
} else {
throw new DAVStatusException(
HttpServletResponse.SC_BAD_REQUEST, "Unrecognized 'lookup' request format.");
}
String prefix = decodeHandle(this.pathElt[hdlStart]);
String handle = null;
// if "prefix" contains a slash, then it's the whole handle:
if (prefix.indexOf("/") >= 0) {
handle = prefix;
log.debug("Lookup: resolving escaped handle \"" + handle + "\"");
} else if (this.pathElt.length >= hdlStart + 2) {
StringBuffer hdl = new StringBuffer(prefix);
for (int i = hdlStart + 1; i < this.pathElt.length; ++i) {
hdl.append("/");
hdl.append(this.pathElt[i]);
}
handle = hdl.toString();
log.debug("Lookup: resolving multielement handle \"" + handle + "\"");
} else {
throw new DAVStatusException(
HttpServletResponse.SC_BAD_REQUEST, "Incomplete handle in lookup request.");
}
// did handle lookup fail?
ResolvableIdentifier dsi = IdentifierService.resolve(context, handle);
dso = (DSpaceObject) IdentifierService.getResource(context, dsi);
if (dso == null) {
throw new DAVStatusException(
HttpServletResponse.SC_NOT_FOUND, "Cannot resolve handle \"" + handle + "\"");
}
// bitstream must exist too
String location = makeLocation(dso, bsPid);
if (location == null) {
throw new DAVStatusException(
HttpServletResponse.SC_NOT_FOUND,
"Bitstream \"" + bsPid + "\" does not exist in \"" + handle + "\"");
}
// add query string -- unnecessary, but it helps naive clients that
// use GET with "package" query arg to download an Item.
String qs = this.request.getQueryString();
if (qs != null) {
location += "?" + qs;
}
log.debug("Lookup returning redirect to: " + location);
this.response.setHeader("Location", location);
this.response.sendError(
HttpServletResponse.SC_MOVED_TEMPORARILY,
"These are not the droids you are looking for.");
} catch (IdentifierException e) {
log.error("caught exception: ", e);
throw new RuntimeException(e);
}
}
