如何在weblogic12c中将动态图像作为servletoutputstream的一部分发送

Question

I have to send dynamic image generated through BufferedImage and imageIO.write. The byteArray is written to servletoutputstream of httpsevletresponse. The content-type is set to image/jpeg and encoding is set to utf-8 in httpsevletresponse object.

But while sevletOutputStream.write(b), I am getting java.nio.charset.MalFormedInputException : Input length :1

Do I need to set the encoding to utf-16.

This error is coming in weblogic 12c server with jdk 1.7.0_45 only.

The Same code is working on other application server as well as tomcat

StackTrace : The exception trace as per below

<captchaBytes=[B@26e5c86e>  
  java.nio.charset.MalformedInputException: Input length = 1> 
<at java.nio.charset.CoderResult.throwException(CoderResult.java:277)> 
<at weblogic.servlet.internal.CharChunkOutput.write(CharChunkOutput.java:116)>
<at weblogic.servlet.internal.ChunkOutputWrapper.write(ChunkOutputWrapper.java:148)>
<at weblogic.servlet.jsp.BodyOutputStream.write(NestedBodyResponse.java:54)>
<at java.io.OutputStream.write(OutputStream.java:75)>

Code Snippet :

Byte[] imageBytes = get image byte from backend using ImageIO.write
httpServletResponse.setContentType("image/jpeg");
ServletOutputStream out;
httpServletResponse.setHeader("Cache-Control", "no-store");
httpServletResponse.setHeader("Pragma", "no-cache");
httpServletResponse.setDateHeader("Expires", 0);
httpServletResponse.setCharacterEncoding("UTF-8");
out = httpServletResponse.getOutputStream();
out.flush();
out.write(imageBytes);  \\ Error Occured here

Answer 1

After adding httpServletRequest.resetBuffer() before calling the out = httpServletResponse.getOutputStream() resolved this issue. The MalformedInputException was thrown because this JSP where image was generated was included as part of other jsp within the image tag src.