Am having a HTML page `http://www.mywebapp.com/sample.html` which is used from remote server. am passing the HTML URL as hidden form like this in the same HTML form,

```
<form action="/myservlet?userid=12345" method="post" enctype="multipart/form-data">
<input type="file" name="file">
<input type="submit" value="Submit">
<input type="hidden" name="url" value="http://www.mywebapp.com/sample.html"/>
</form>

```

In my servlet i got the hidden URL `http://www.mywebapp.com/sample.html` and stored it as 
`String fieldValue = http://www.mywebapp.com/sample.html`

Now When i try `RequestDispatcher` and forward the page to the hidden URL like this,

```
RequestDispatcher rd = req.getRequestDispatcher(fieldValue);
rd.forward(req, resp);

```

am getting `ERROR 404`. 

Can anyone suggest me an idea to solve this. 

**EDITED**

What i exactly want to do is, From a Remote Server a HTML page will request to my REST Web services. The response of the web service will be in JSON output. Now i want to send this JSON Response to the requested HTML form(i.e. to the Remote Server HTML page) 

Can anyone suggest an idea to solve this.
Your help will be appreciated.