Robert Shields wrote:
The only thing I could think of would be a Filter -- requires Servlet 2.3 or later -- that would be able to scrape a copy of the incoming request, yet still provide getInputStream() and getReader() methods that would let the actual servlet being invoked operate normally.Hi Craig,
Yes, I thought as much.
Do you know if it's possible to exactly recreate the binary HTTP body from parsed parameters, or elsewhere for that matter?
You'll also have to watch out for the complexity that a servlet can call *either* getInputStream() *or* getReader() on any single call. That means, among other things, that you'll need to create a request wrapper that not only does the copying for you, but also fakes the getReader() method, since you'll have already called getInputStream() on the real underlying request.
You'll probably need to check the content type as well ... the above works for how browsers normally post data (content type "application/x-www-form-urlencoded"), but multipart uploads use something different.
I'm writing a web proxy using HttpClient - currently I've only tested a urlencoded form, which works fine with the following code. I wonder how it will fair when it encounters a mutipart form - I haven't tested yet.
HttpClient client = new HttpClient();
...
if (request.getMethod().toLowerCase().equals("post"))
{
HttpMethod method = new PostMethod(url.toString());
PostMethod postMethod = (PostMethod)method;
// populate form parameters
Enumeration paramEnum = request.getParameterNames();
while (paramEnum.hasMoreElements()) {
String key = ((String) paramEnum.nextElement());
String[] values = request.getParameterValues(key);
String value = "";
for(int i=0; i<values.length; i++)
value += values[i] + (i < values.length-1 ? "," : "");
postMethod.addParameter(key, value);
}
}
Sorry for the HTML email - outlook web access :)
On the other hand, if you never call getParameterXxx() type methods in your servlet, you should have been able to copy the input stream as in your original approach -- you might want to double check that you're not doing that.
Rob
Craig
-----Original Message----- From: Craig McClanahan [mailto:[EMAIL PROTECTED] Sent: Thu 15/07/2004 17:50 To: Struts Users Mailing List Cc: Subject: Re: calling request.getInputStream() within Action
Robert Shields wrote:
>Hi Bill
>
>Thanks for your response.
>I've tried with a servlet too, but even without calling
>request.getParameter the stream is still empty:
>
> >
One way to paint yourself into this particular corner is if you're
trying this on a POST request. As soon as you call a method like
request.getParameter(), the container has to read the content of the
input stream (since that is where the key/value pairs are), so trying to
read the stream after that is not going to work.
Craig
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