Use Netty's constants

Author: slandelle

client/src/main/java/org/asynchttpclient/request/body/multipart/FileLikePart.java

@@ -13,6 +13,7 @@
 package org.asynchttpclient.request.body.multipart;
 
 import static org.asynchttpclient.util.MiscUtils.withDefault;
+import static io.netty.handler.codec.http.HttpHeaders.Values.*;
 
 import java.nio.charset.Charset;
 
@@ -26,11 +27,6 @@ public abstract class FileLikePart extends PartBase {
      */
     public static final String DEFAULT_CONTENT_TYPE = "application/octet-stream";
 
-    /**
-     * Default transfer encoding of file attachments.
-     */
-    public static final String DEFAULT_TRANSFER_ENCODING = "binary";
-
     private String fileName;
 
     /**
@@ -47,7 +43,7 @@ public FileLikePart(String name, String contentType, Charset charset, String con
                 withDefault(contentType, DEFAULT_CONTENT_TYPE),//
                 charset,//
                 contentId,//
-                withDefault(transfertEncoding, DEFAULT_TRANSFER_ENCODING));
+                withDefault(transfertEncoding, BINARY));
     }
 
     public final void setFileName(String fileName) {

client/src/main/java/org/asynchttpclient/request/body/multipart/MultipartUtils.java

@@ -14,6 +14,7 @@
 package org.asynchttpclient.request.body.multipart;
 
 import static java.nio.charset.StandardCharsets.US_ASCII;
+import static io.netty.handler.codec.http.HttpHeaders.Values.*;
 import static org.asynchttpclient.util.Assertions.assertNotNull;
 import static org.asynchttpclient.util.MiscUtils.isNonEmpty;
 import io.netty.handler.codec.http.HttpHeaders;
@@ -30,11 +31,6 @@
 
 public class MultipartUtils {
 
-    /**
-     * The Content-Type for multipart/form-data.
-     */
-    private static final String MULTIPART_FORM_CONTENT_TYPE = "multipart/form-data";
-
     /**
      * The pool of ASCII chars to be used for generating a multipart boundary.
      */
@@ -67,7 +63,7 @@ public static MultipartBody newMultipartBody(List<Part> parts, HttpHeaders reque
             }
         } else {
             boundary = generateBoundary();
-            contentType = computeContentType(MULTIPART_FORM_CONTENT_TYPE, boundary);
+            contentType = computeContentType(MULTIPART_FORM_DATA, boundary);
         }
 
         List<MultipartPart<? extends Part>> multipartParts = generateMultipartParts(parts, boundary);