mudit-97 commented on a change in pull request #423:
URL: https://github.com/apache/knox/pull/423#discussion_r605892461



##########
File path: 
gateway-spi/src/main/java/org/apache/knox/gateway/dispatch/ConfigurableDispatch.java
##########
@@ -41,13 +47,26 @@
 public class ConfigurableDispatch extends DefaultDispatch {
   private Set<String> requestExcludeHeaders = 
super.getOutboundRequestExcludeHeaders();
   private Set<String> responseExcludeHeaders = 
super.getOutboundResponseExcludeHeaders();
+  private Map<String, String> requestAppendHeaders = new HashMap<>();
   private Set<String> responseExcludeSetCookieHeaderDirectives = 
super.getOutboundResponseExcludedSetCookieHeaderDirectives();
   private Boolean removeUrlEncoding = false;
 
   private Set<String> convertCommaDelimitedHeadersToSet(String headers) {
     return headers == null ?  Collections.emptySet(): new 
HashSet<>(Arrays.asList(headers.split("\\s*,\\s*")));
   }
 
+  private Map<String, String> convertJSONHeadersToMap(String headers) {

Review comment:
       I had some doubts around this. I checked that in CustomDispatch, there 
is one xml param support for useTwoWaySsl:
   
   @XmlAttribute(name = "use-two-way-ssl")
     public boolean getUseTwoWaySsl() {
       return useTwoWaySsl;
     }
   
   
   Are you suggesting that we should have a new parameter requestAppendHeaders 
and xml will look like this:
   ```
   
   <requestAppendHeaders>
       <header>
         <name>a</name>
         <value>b</value>
       </header>
       <header>
         <name>c</name>
         <value>d</value>
       </header>
     </requestAppendHeaders>
   ```
   
   
   or are you suggesting a layout like this (requestAppendHeaders as a param 
only):
   
   ```
   <param>
     <requestAppendHeaders>
       <header>
         <name>a</name>
         <value>b</value>
       </header>
       <header>
         <name>c</name>
         <value>d</value>
       </header>
     </requestAppendHeaders>
   </param>
   
   ```




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