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HDFS-2404. webhdfs liststatus json response is not correct. Contributed by Suresh Srinivas. 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1180757 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Suresh Srinivas 2011-10-10 01:49:37 +00:00
parent a09a2b48cd
commit 676f488eff
5 changed files with 40 additions and 36 deletions
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2
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -108,6 +108,8 @@ Trunk (unreleased changes)
HDFS-2409. _HOST in dfs.web.authentication.kerberos.principal. (jitendra)
HDFS-2404. webhdfs liststatus json response is not correct. (suresh)
Release 0.23.0 - Unreleased
INCOMPATIBLE CHANGES

10
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/web/resources/NamenodeWebHdfsMethods.java
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@ -424,7 +424,7 @@ public class NamenodeWebHdfsMethods {
case GETFILESTATUS:
{
final HdfsFileStatus status = np.getFileInfo(fullpath);
final String js = JsonUtil.toJsonString(status);
final String js = JsonUtil.toJsonString(status, true);
return Response.ok(js).type(MediaType.APPLICATION_JSON).build();
}
case LISTSTATUS:
@ -480,22 +480,22 @@ public class NamenodeWebHdfsMethods {
@Override
public void write(final OutputStream outstream) throws IOException {
final PrintStream out = new PrintStream(outstream);
out.println("{\"" + HdfsFileStatus[].class.getSimpleName() + "\":[");
out.println("{\"" + HdfsFileStatus.class.getSimpleName() + "\":[");
final HdfsFileStatus[] partial = first.getPartialListing();
if (partial.length > 0) {
out.print(JsonUtil.toJsonString(partial[0]));
out.print(JsonUtil.toJsonString(partial[0], false));
}
for(int i = 1; i < partial.length; i++) {
out.println(',');
out.print(JsonUtil.toJsonString(partial[i]));
out.print(JsonUtil.toJsonString(partial[i], false));
}
for(DirectoryListing curr = first; curr.hasMore(); ) {
curr = getDirectoryListing(np, p, curr.getLastName());
for(HdfsFileStatus s : curr.getPartialListing()) {
out.println(',');
out.print(JsonUtil.toJsonString(s));
out.print(JsonUtil.toJsonString(s, false));
}
}

14
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/web/JsonUtil.java
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@ -133,10 +133,11 @@ public class JsonUtil {
}
/** Convert a HdfsFileStatus object to a Json string. */
public static String toJsonString(final HdfsFileStatus status) {
public static String toJsonString(final HdfsFileStatus status,
boolean includeType) {
if (status == null) {
return null;
} else {
}
final Map<String, Object> m = new TreeMap<String, Object>();
m.put("localName", status.getLocalName());
m.put("isDir", status.isDir());
@ -153,17 +154,18 @@ public class JsonUtil {
m.put("modificationTime", status.getModificationTime());
m.put("blockSize", status.getBlockSize());
m.put("replication", status.getReplication());
return toJsonString(HdfsFileStatus.class, m);
}
return includeType ? toJsonString(HdfsFileStatus.class, m) :
JSON.toString(m);
}
/** Convert a Json map to a HdfsFileStatus object. */
public static HdfsFileStatus toFileStatus(final Map<?, ?> json) {
public static HdfsFileStatus toFileStatus(final Map<?, ?> json, boolean includesType) {
if (json == null) {
return null;
}
final Map<?, ?> m = (Map<?, ?>)json.get(HdfsFileStatus.class.getSimpleName());
final Map<?, ?> m = includesType ?
(Map<?, ?>)json.get(HdfsFileStatus.class.getSimpleName()) : json;
final String localName = (String) m.get("localName");
final boolean isDir = (Boolean) m.get("isDir");
final boolean isSymlink = (Boolean) m.get("isSymlink");

6
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/web/WebHdfsFileSystem.java
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@ -253,7 +253,7 @@ public class WebHdfsFileSystem extends HftpFileSystem {
private HdfsFileStatus getHdfsFileStatus(Path f) throws IOException {
final HttpOpParam.Op op = GetOpParam.Op.GETFILESTATUS;
final Map<String, Object> json = run(op, f);
final HdfsFileStatus status = JsonUtil.toFileStatus(json);
final HdfsFileStatus status = JsonUtil.toFileStatus(json, true);
if (status == null) {
throw new FileNotFoundException("File does not exist: " + f);
}
@ -405,14 +405,14 @@ public class WebHdfsFileSystem extends HftpFileSystem {
final HttpOpParam.Op op = GetOpParam.Op.LISTSTATUS;
final Map<?, ?> json = run(op, f);
final Object[] array = (Object[])json.get(
HdfsFileStatus[].class.getSimpleName());
HdfsFileStatus.class.getSimpleName());
//convert FileStatus
final FileStatus[] statuses = new FileStatus[array.length];
for(int i = 0; i < array.length; i++) {
@SuppressWarnings("unchecked")
final Map<String, Object> m = (Map<String, Object>)array[i];
statuses[i] = makeQualified(JsonUtil.toFileStatus(m), f);
statuses[i] = makeQualified(JsonUtil.toFileStatus(m, false), f);
}
return statuses;
}

4
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/web/TestJsonUtil.java
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@ -46,9 +46,9 @@ public class TestJsonUtil {
final FileStatus fstatus = toFileStatus(status, parent);
System.out.println("status = " + status);
System.out.println("fstatus = " + fstatus);
final String json = JsonUtil.toJsonString(status);
final String json = JsonUtil.toJsonString(status, true);
System.out.println("json = " + json.replace(",", ",\n "));
final HdfsFileStatus s2 = JsonUtil.toFileStatus((Map<?, ?>)JSON.parse(json));
final HdfsFileStatus s2 = JsonUtil.toFileStatus((Map<?, ?>)JSON.parse(json), true);
final FileStatus fs2 = toFileStatus(s2, parent);
System.out.println("s2 = " + s2);
System.out.println("fs2 = " + fs2);