Fix: java.lang.NullPointerException if no error page configured for errors.

Author: dgilling

README.md

@@ -33,7 +33,7 @@ Add the Moesif dependency to your project's pom.xml file:
 <dependency>
     <groupId>com.moesif.servlet</groupId>
     <artifactId>moesif-servlet</artifactId>
-    <version>1.6.3</version>
+    <version>1.6.4</version>
 </dependency>
 ```
 
@@ -48,7 +48,7 @@ repositories {
 }
  
 dependencies {   
-    compile 'com.moesif.servlet:moesif-servlet:1.6.3'
+    compile 'com.moesif.servlet:moesif-servlet:1.6.4'
 }
 ```
 

moesif-servlet/pom.xml

@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.moesif.servlet</groupId>
   <artifactId>moesif-servlet</artifactId>
-  <version>1.6.3</version>
+  <version>1.6.4</version>
   <packaging>jar</packaging>
   <name>moesif-servlet</name>
   <description>Moesif SDK for Java Servlet to log and analyze API calls</description>

moesif-servlet/src/main/java/com/moesif/servlet/wrappers/LoggingHttpServletResponseWrapper.java

@@ -76,6 +76,9 @@ public Map<String, String> getHeaders() {
   public String getContent() {
     try {
       flushBuffer();
+      if (logStream == null) {
+        return null;
+      }
       String responseEncoding = getResponse().getCharacterEncoding();
       return logStream.baos.toString(responseEncoding != null ? responseEncoding : UTF_8.name());
     } catch (UnsupportedEncodingException e) {