Question

I am trying to make a Http POST request using apache HTTP client. I am trying to copy contents of an HTTP POST request (received at my application) to another HTTP POST request (initiated from my application to another URL). Code is shown below:

httpPost = new HttpPost(inputURL);
// copy headers
for (Enumeration<String> e = request.getHeaderNames(); e.hasMoreElements();) {
      String headerName = e.nextElement().toString(); 
      httpPost.setHeader(headerName, request.getHeader(headerName));
}

BufferedInputStream clientToProxyBuf = new BufferedInputStream(request.getInputStream());
BasicHttpEntity basicHttpEntity = new BasicHttpEntity();
basicHttpEntity.setContent(clientToProxyBuf);
basicHttpEntity.setContentLength(clientToProxyBuf.available());

httpPost.setEntity(basicHttpEntity);

HttpResponse responseFromWeb = httpclient.execute(httpPost);

Basically, I am trying to implement a proxy application which will get a url as parameter, froward the request to the URL and then serve pages etc in custom look and feel.

Here request is HttpServletRequest. I am facing problem in setting content length. Through debugging I found out that clientToProxyBuf.available() is not giving me correct length of input stream and I am getting Http error 400 IE and Error 354 (net::ERR_CONTENT_LENGTH_MISMATCH): The server unexpectedly closed the connection in chrome.

Am I doing it wrong? Is there any other way to achieve it?

Answer 1

It was rather simple and very obvious. I just needed to get content length from header as:

basicHttpEntity.setContentLength(Integer.parseInt(request.getHeader("Content-Length")));