From 4d9da157bc4794524855f455d9df55c73f0dbdb0 Mon Sep 17 00:00:00 2001
From: Chris Lu <chris.lu@gmail.com>
Date: Sat, 1 Aug 2020 11:36:29 -0700
Subject: [PATCH] HDFS: read gzip content

---
 .../java/seaweedfs/client/SeaweedRead.java    | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/other/java/client/src/main/java/seaweedfs/client/SeaweedRead.java b/other/java/client/src/main/java/seaweedfs/client/SeaweedRead.java
index 48d942f88..9edbfb799 100644
--- a/other/java/client/src/main/java/seaweedfs/client/SeaweedRead.java
+++ b/other/java/client/src/main/java/seaweedfs/client/SeaweedRead.java
@@ -2,6 +2,7 @@ package seaweedfs.client;
 
 import org.apache.http.HttpEntity;
 import org.apache.http.HttpHeaders;
+import org.apache.http.client.entity.GzipDecompressingEntity;
 import org.apache.http.client.methods.CloseableHttpResponse;
 import org.apache.http.client.methods.HttpGet;
 import org.apache.http.util.EntityUtils;
@@ -78,7 +79,7 @@ public class SeaweedRead {
         HttpGet request = new HttpGet(
                 String.format("http://%s/%s", locations.getLocations(0).getUrl(), chunkView.fileId));
 
-        request.setHeader(HttpHeaders.ACCEPT_ENCODING, "");
+        request.setHeader(HttpHeaders.ACCEPT_ENCODING, "gzip");
 
         byte[] data = null;
 
@@ -87,6 +88,18 @@ public class SeaweedRead {
         try {
             HttpEntity entity = response.getEntity();
 
+            Header contentEncodingHeader = entity.getContentEncoding();
+
+            if (contentEncodingHeader != null) {
+                HeaderElement[] encodings =contentEncodingHeader.getElements();
+                for (int i = 0; i < encodings.length; i++) {
+                    if (encodings[i].getName().equalsIgnoreCase("gzip")) {
+                        entity = new GzipDecompressingEntity(entity);
+                        break;
+                    }
+                }
+            }
+
             data = EntityUtils.toByteArray(entity);
 
             EntityUtils.consume(entity);
@@ -96,10 +109,6 @@ public class SeaweedRead {
             request.releaseConnection();
         }
 
-        if (chunkView.isCompressed) {
-            // data = Gzip.decompress(data);
-        }
-
         if (chunkView.cipherKey != null && chunkView.cipherKey.length != 0) {
             try {
                 data = SeaweedCipher.decrypt(data, chunkView.cipherKey);