fixes #2343 Trim the encoding for req res tranformer interceptors

Author: stevehu

request-transformer/src/main/java/com/networknt/reqtrans/RequestTransformerInterceptor.java

@@ -147,7 +147,7 @@ public void handleRequest(HttpServerExchange exchange) throws Exception {
                                     if (shouldAttachBody(exchange.getRequestHeaders())) {
                                         if(logger.isTraceEnabled()) logger.trace("shouldAttachBody is true");
                                         PooledByteBuffer[] requestData = this.getBuffer(exchange);
-                                        String s = BuffersUtils.toString(requestData, encoding != null ? encoding : config.getDefaultBodyEncoding());
+                                        String s = BuffersUtils.toString(requestData, encoding != null ? encoding.trim() : config.getDefaultBodyEncoding());
                                         // Transform the request body with the rule engine.
                                         if(logger.isDebugEnabled()) logger.debug("original request body = {}", s);
                                         objMap.put("requestBody", s);

response-transformer/src/main/java/com/networknt/restrans/ResponseTransformerInterceptor.java

@@ -109,7 +109,7 @@ public void handleRequest(HttpServerExchange exchange) throws Exception {
             if(match.isPresent()) {
                 String encoding = StringUtils.getSecondPart(match.get());
                 if(encoding != null && logger.isTraceEnabled()) logger.trace("Customized encoding {} found in the prefix {} for requestPath {}", encoding, match.get(), requestPath);
-                String responseBody = BuffersUtils.toString(getBuffer(exchange), encoding != null ? encoding : config.getDefaultBodyEncoding());
+                String responseBody = BuffersUtils.toString(getBuffer(exchange), encoding != null ? encoding.trim() : config.getDefaultBodyEncoding());
                 if (logger.isTraceEnabled())
                     logger.trace("original response body = {}", responseBody);
 

utility/src/test/java/com/networknt/utility/StringUtilsTest.java

@@ -95,5 +95,11 @@ public void testGetSecondPart() {
 
         result = StringUtils.getSecondPart("Multiple Words Here");
         Assert.assertEquals("Words Here", result);
+
+        result = StringUtils.getSecondPart("Hello World ");
+        Assert.assertEquals("World ", result);
+
+        result = StringUtils.getSecondPart("Hello  World ");
+        Assert.assertEquals(" World ", result);
     }
 }