Error in proxy servlet implementation

Question

Hi all,
I have implemented a simple proxy servlet. My requirement is whenever a call is made to the servlet , the servlet must make a http call to the particular site, make a request for the content and then display the same in the browser.
At present i am able to fetch the html content, but i am facing problem in retrieving the sources such as .js,.css files and also the alignment of the site is totally wrong.
The code that i use in the servlet is as follows:
HttpResponse resp = makeCall(request, "www.google.co.in");
InputStream inReader = resp.getEntity().getContent();
InputStreamReader stmReader = new InputStreamReader(inReader);
BufferedReader reader = new BufferedReader(stmReader);
StringBuilder szResultBuilder = new StringBuilder(1000);
if (reader != null) {
String line = reader.readLine();
while (line != null) {
szResultBuilder.append(line);
line = reader.readLine();
ServletOutputStream out = response.getOutputStream();
out.write(szResultBuilder.toString().getBytes());
out.flush();
out.close();
public static HttpResponse makeCall(HttpServletRequest request, String szURL) throws Exception {
HttpResponse response = null;
if(request.getMethod().equals("POST"))     {
HttpPost post = new HttpPost(szURL);
response = httpClient.execute(post);
} else if(request.getMethod().equals("GET")){
HttpGet get = new HttpGet(szURL);
response = httpClient.execute(get);
return response;
Kindly help me in retrieving the entire content of the site and in displaying it. How can i retrieve the entire content for all the sites the user requests.
Regards,
A.Rajesh

Answer 1

rajesh.a wrote:
Hi all,
I have implemented a simple proxy servlet. My requirement is whenever a call is made to the servlet , the servlet must make a http call to the particular site, make a request for the content and then display the same in the browser.
At present i am able to fetch the html content, but i am facing problem in retrieving the sources such as .js,.css files and also the alignment of the site is totally wrong. You will have to understand how html works. On first request, the entire html as text is sent to the browser. When the browser begins interpreting the html and comes across a js or css tag, it makes a new request to the browser for these resources (unless it is already cached on the browser).
The request for this js resource would point back to the server which served the html unless of course the resource url is absolute.
Knowing that, you see the problem now? Your js (and css and images) would all point back to the server that runs your proxy servlet. However the resources reside on the remote server from where you plucked the html. You have 3 options IMO
1. Rewrite the original urls in the proxy servlet to point to the proxy servlet which would then proxy these resources back from the remote server back to the browser.
2. Have absolute urls for all resource urls and expose the remote server to the web.
3. Take a look at Clipper technology (google for Web Clipper).
Best,
ram.