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Asked: 2026-05-11T13:39:11+00:00

I need to make a request from a servlet but I also need to

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I need to make a request from a servlet but I also need to retain all the header information. That is in the request object.

For example, I if I do something like the following from the doGet method, is there a simple way to just pass that information to the URL Connection object?

URL url = new URL(); URLConnection uc = url.openConnection(); uc.setDoOutput(true); uc.setDoInput(true); uc.setUseCaches(false);  uc.setRequestProperty('Content-type', 'application/x-www-form-urlencoded');  DataOutputStream dos = new DataOutputStream(uc.getOutputStream()); dos.writeBytes(strInEnc); dos.flush(); dos.close();  InputStreamReader in = new InputStreamReader(uc.getInputStream()); int chr = in.read(); while (chr != -1) { taResults.append(String.valueOf((char) chr)); chr = in.read();
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1 Answer

  1. Use the addRequestProperty method of URLConnection.

    Enumeration<?> names = req.getHeaderNames(); while (names.hasMoreElements()) {   String key = (String) names.nextElement();   Enumeration<?> values = req.getHeaders(key);   while (values.hasMoreElements()) {     uc.addRequestProperty(key, (String) values.nextElement());   } }

    You’ll have a similar set of loops if you use HttpClient, unless it has built-in support for pass-through of a ServletRequest. (And if it doesn’t, why bother with a huge set of additional dependencies, and non-standard API?)

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