private URI redirectURI(
final NameNode namenode,
final UserGroupInformation ugi,
final DelegationParam delegation,
final UserParam username,
final DoAsParam doAsUser,
final String path,
final HttpOpParam.Op op,
final long openOffset,
final long blocksize,
final Param<?, ?>... parameters)
throws URISyntaxException, IOException {
final Configuration conf = (Configuration) context.getAttribute(JspHelper.CURRENT_CONF);
final DatanodeInfo dn = chooseDatanode(namenode, path, op, openOffset, blocksize, conf);
final String delegationQuery;
if (!UserGroupInformation.isSecurityEnabled()) {
// security disabled
delegationQuery = Param.toSortedString("&", doAsUser, username);
} else if (delegation.getValue() != null) {
// client has provided a token
delegationQuery = "&" + delegation;
} else {
// generate a token
final Token<? extends TokenIdentifier> t =
generateDelegationToken(namenode, ugi, request.getUserPrincipal().getName());
delegationQuery = "&" + new DelegationParam(t.encodeToUrlString());
}
final String query =
op.toQueryString()
+ delegationQuery
+ "&"
+ new NamenodeRpcAddressParam(namenode)
+ Param.toSortedString("&", parameters);
final String uripath = WebHdfsFileSystem.PATH_PREFIX + path;
final URI uri = new URI("http", null, dn.getHostName(), dn.getInfoPort(), uripath, query, null);
if (LOG.isTraceEnabled()) {
LOG.trace("redirectURI=" + uri);
}
return uri;
}
private Response get(
final UserGroupInformation ugi,
final DelegationParam delegation,
final UserParam username,
final DoAsParam doAsUser,
final String fullpath,
final GetOpParam op,
final OffsetParam offset,
final LengthParam length,
final RenewerParam renewer,
final BufferSizeParam bufferSize)
throws IOException, URISyntaxException {
final NameNode namenode = (NameNode) context.getAttribute("name.node");
final NamenodeProtocols np = namenode.getRpcServer();
switch (op.getValue()) {
case OPEN:
{
final URI uri =
redirectURI(
namenode,
ugi,
delegation,
username,
doAsUser,
fullpath,
op.getValue(),
offset.getValue(),
-1L,
offset,
length,
bufferSize);
return Response.temporaryRedirect(uri).type(MediaType.APPLICATION_OCTET_STREAM).build();
}
case GET_BLOCK_LOCATIONS:
{
final long offsetValue = offset.getValue();
final Long lengthValue = length.getValue();
final LocatedBlocks locatedblocks =
np.getBlockLocations(
fullpath, offsetValue, lengthValue != null ? lengthValue : Long.MAX_VALUE);
final String js = JsonUtil.toJsonString(locatedblocks);
return Response.ok(js).type(MediaType.APPLICATION_JSON).build();
}
case GETFILESTATUS:
{
final HdfsFileStatus status = np.getFileInfo(fullpath);
if (status == null) {
throw new FileNotFoundException("File does not exist: " + fullpath);
}
final String js = JsonUtil.toJsonString(status, true);
return Response.ok(js).type(MediaType.APPLICATION_JSON).build();
}
case LISTSTATUS:
{
final StreamingOutput streaming = getListingStream(np, fullpath);
return Response.ok(streaming).type(MediaType.APPLICATION_JSON).build();
}
case GETCONTENTSUMMARY:
{
final ContentSummary contentsummary = np.getContentSummary(fullpath);
final String js = JsonUtil.toJsonString(contentsummary);
return Response.ok(js).type(MediaType.APPLICATION_JSON).build();
}
case GETFILECHECKSUM:
{
final URI uri =
redirectURI(
namenode, ugi, delegation, username, doAsUser, fullpath, op.getValue(), -1L, -1L);
return Response.temporaryRedirect(uri).type(MediaType.APPLICATION_OCTET_STREAM).build();
}
case GETDELEGATIONTOKEN:
{
if (delegation.getValue() != null) {
throw new IllegalArgumentException(delegation.getName() + " parameter is not null.");
}
final Token<? extends TokenIdentifier> token =
generateDelegationToken(namenode, ugi, renewer.getValue());
final String js = JsonUtil.toJsonString(token);
return Response.ok(js).type(MediaType.APPLICATION_JSON).build();
}
case GETHOMEDIRECTORY:
{
final String js =
JsonUtil.toJsonString(
org.apache.hadoop.fs.Path.class.getSimpleName(),
WebHdfsFileSystem.getHomeDirectoryString(ugi));
return Response.ok(js).type(MediaType.APPLICATION_JSON).build();
}
default:
throw new UnsupportedOperationException(op + " is not supported");
}
}