HttpPost で .setEntity(HttpEntity) メソッドを呼び出して、投稿リクエストで本文を指定する必要があります。
private void sendToPostProxy(HttpServletRequest request,
HttpServletResponse response) throws IOException {
//the url to forward too
String url = "http://127.0.0.1:"+proxyPort+request.getRequestURI()
+(request.getQueryString()==null?"":"?"+request.getQueryString());
HttpPost get = new HttpPost(url);
//I am streaming requests straight through, but there are many Entity types you can use
get.setEntity(new InputStreamEntity(request.getInputStream(), request.getContentLength()));
sendToProxy(request, response, get);
}
private void sendToProxy(HttpServletRequest request,
HttpServletResponse response,HttpRequestBase get) throws IOException {
DefaultHttpClient client = new DefaultHttpClient();
Enumeration headers = request.getHeaderNames();
//copy headers
while(headers.hasMoreElements()){
String next = String.valueOf(headers.nextElement());
String header = request.getHeader(next);
if (!get.containsHeader(next)&&!"Content-Length".equalsIgnoreCase(next))
get.addHeader(next, header);
}
try{
//perform post
HttpResponse proxied = client.execute(get);
//set client headers
for (Header h : proxied.getAllHeaders()){
response.setHeader(h.getName(), h.getValue());
}
//stream to client
HttpEntity body = proxied.getEntity();
body.writeTo(response.getOutputStream());
response.setStatus(HttpServletResponse.SC_OK);
}catch(Exception e){
e.printStackTrace();
get.abort();
}
}