api: putObject() should properly save contentType. (#465)

Current code was not working when contentType is set
to a custom value.

Fixes #464

src/main/java/io/minio/MinioClient.java

@@ -2065,8 +2065,9 @@ public void putObject(String bucketName, String objectName, InputStream stream,
    * @param uploadId     Upload ID of multipart put object.
    * @param partNumber   Part number of multipart put object.
    */
-  private String putObject(String bucketName, String objectName, int length, Object data,
-                           String uploadId, int partNumber)
+  private String putObject(String bucketName, String objectName, int length,
+                           Object data, String uploadId, String contentType,
+                           int partNumber)
     throws InvalidBucketNameException, NoSuchAlgorithmException, InsufficientDataException, IOException,
            InvalidKeyException, NoResponseException, XmlPullParserException, ErrorResponseException,
            InternalException {
@@ -2076,8 +2077,14 @@ private String putObject(String bucketName, String objectName, int length, Objec
       queryParamMap.put("partNumber", Integer.toString(partNumber));
       queryParamMap.put(UPLOAD_ID, uploadId);
     }
-
-    HttpResponse response = executePut(bucketName, objectName, null, queryParamMap, data, length);
+    Map<String,String> headerMap = new HashMap<>();
+    if (contentType != null) {
+      headerMap.put("Content-Type", contentType);
+    } else {
+      headerMap.put("Content-Type", "application/octet-stream");
+    }
+    HttpResponse response = executePut(bucketName, objectName, headerMap,
+                                       queryParamMap, data, length);
     return response.header().etag();
   }
 
@@ -2098,8 +2105,8 @@ private void putObject(String bucketName, String objectName, String contentType,
            InternalException,
            InvalidArgumentException, InsufficientDataException {
     if (size <= MIN_MULTIPART_SIZE) {
-      // single put object
-      putObject(bucketName, objectName, (int) size, data, null, 0);
+      // Single put object.
+      putObject(bucketName, objectName, (int) size, data, null, contentType, 0);
       return;
     }
 
@@ -2146,7 +2153,7 @@ private void putObject(String bucketName, String objectName, String contentType,
         }
       }
 
-      String etag = putObject(bucketName, objectName, expectedReadSize, data, uploadId, partNumber);
+      String etag = putObject(bucketName, objectName, expectedReadSize, data, uploadId, null, partNumber);
       totalParts[partNumber - 1] = new Part(partNumber, etag);
     }
 

src/main/java/io/minio/ObjectStat.java

@@ -64,7 +64,7 @@ public boolean equals(Object o) {
 
     if (length != that.length) {
       return false;
-    }    
+    }
     if (!bucketName.equals(that.bucketName)) {
       return false;
     }
@@ -97,6 +97,13 @@ public int hashCode() {
   }
 
 
+  /**
+   * Returns bucket name.
+   */
+  public String bucketName() {
+    return bucketName;
+  }
+
   /**
    * Returns object name.
    */
@@ -120,22 +127,19 @@ public long length() {
     return length;
   }
 
-
-  /**
-   * Returns bucket name.
-   */
-  public String bucketName() {
-    return bucketName;
-  }
-
-
   /**
    * Returns ETag.
    */
   public String etag() {
     return etag;
   }
 
+  /**
+   * Returns content type of object.
+   */
+  public String contentType() {
+    return contentType;
+  }
 
   /**
    * Returns ObjectStat as string.

src/test/java/io/minio/MinioClientTest.java

@@ -54,6 +54,7 @@ public class MinioClientTest {
   private static final String BUCKET = "bucket";
   private static final String CONTENT_LENGTH = "Content-Length";
   private static final String APPLICATION_OCTET_STREAM = "application/octet-stream";
+  private static final String APPLICATION_JAVASCRIPT = "application/javascript";
   private static final String CONTENT_TYPE = "Content-Type";
   private static final String MON_04_MAY_2015_07_58_51_GMT = "Mon, 04 May 2015 07:58:51 GMT";
   private static final String LAST_MODIFIED = "Last-Modified";
@@ -614,6 +615,28 @@ public void testNullContentTypeWorks()
     client.putObject(BUCKET, "key", data, 11, null);
   }
 
+  @Test
+  public void testCustomContentTypeWorks()
+    throws NoSuchAlgorithmException, InvalidKeyException, IOException, XmlPullParserException, MinioException {
+    MockWebServer server = new MockWebServer();
+    MockResponse response = new MockResponse();
+
+    response.addHeader("Date", SUN_29_JUN_2015_22_01_10_GMT);
+    response.addHeader(LAST_MODIFIED, MON_04_MAY_2015_07_58_51_UTC);
+    response.addHeader("ETag", MD5_HASH_STRING);
+    response.setResponseCode(200);
+
+    server.enqueue(response);
+    server.start();
+
+    MinioClient client = new MinioClient(server.url(""));
+
+    String inputString = HELLO_WORLD;
+    ByteArrayInputStream data = new ByteArrayInputStream(inputString.getBytes(StandardCharsets.UTF_8));
+
+    client.putObject(BUCKET, "key", data, 11, APPLICATION_JAVASCRIPT);
+  }
+
   @Test
   public void testSigningKey()
     throws NoSuchAlgorithmException, InvalidKeyException, IOException, XmlPullParserException, MinioException {

test/FunctionalTest.java

@@ -43,6 +43,7 @@ public class FunctionalTest {
   public static final int MB = 1024 * 1024;
   public static final SecureRandom random = new SecureRandom();
   public static final String bucketName = getRandomName();
+  public static final String customContenType = "application/javascript";
   public static String endpoint;
   public static String accessKey;
   public static String secretKey;
@@ -193,9 +194,13 @@ public static void putObject_test4() throws Exception {
     println("Test: putObject(String bucketName, String objectName, String contentType, long size, InputStream body)");
     String fileName = createFile(3 * MB);
     InputStream is = Files.newInputStream(Paths.get(fileName));
-    client.putObject(bucketName, fileName, is, 1024 * 1024, null);
+    client.putObject(bucketName, fileName, is, 1024 * 1024, customContenType);
     is.close();
     Files.delete(Paths.get(fileName));
+    ObjectStat objectStat = client.statObject(bucketName, fileName);
+    if (!customContenType.equals(objectStat.contentType())) {
+      println("FAILED");
+    }
     client.removeObject(bucketName, fileName);
   }