CODEWITHSUNDEEP
javastruts
Shwetanka
Shwetanka

Reputation: 5036

How to redirect users using HTTP response

I have a scenario where the user clicks on a 'restaurant' link (for searching restaurants in a particular locality). I have to check whether the location is set or not. If it is not set, I want to redirect him to a page that allows him to set the location, and, then, go back to search results filtered by the set location. I'm using response.sendRedirect(url) to redirect the user to the setting location page. But, how can I send the redirect back URL (i.e., the URL where I want to send the user after the location is set)?

I tried this:

response.sendRedirect("/location/set.html?action=asklocation&redirectUrl="+
            request.getRequestUri()+request.getQueryString());

but this isn't working and 404 error is shown; also, the url formed in the browser doesn't look good.

Please, if anyone could solve the problem ...

Upvotes: 4

Views: 46732

Answers (2)

Christoffer Hammarström
Christoffer Hammarström

Reputation: 27834

Looks like you're missing at least a "?" between request.getRequestUri() and request.getQueryString(). You should url-encode the parameter as well, which you can use java.net.URLEncoder for.

Also, when doing redirects you need to prepend the context path: request.getContextPath().

Something like

String secondRedirectUrl = request.getRequestUri()+"?"+request.getQueryString(); 
String encodedSecondRedirectUrl = URLEncoder.encode(secondRedirectUrl, serverUrlEncodingPreferablyUTF8);
String firstRedirectUrl = request.getContextPath()+"/location/set.html?action=asklocation&redirectUrl="+encodedSecondRedirectUrl;
response.sendRedirect(firstRedirectUrl);

Personally, i'd rather solve the problem by storing a RequestDispatcher in the session and forwarding to it after the location has been set.

Upvotes: 9

Buhake Sindi
Buhake Sindi

Reputation: 89169

My first response will be to remove the / on your URL, something of this effect (to your code):

response.sendRedirect("location/set.html?action=asklocation&redirectUrl="+
            request.getRequestUri()+request.getQueryString());

If that doesn't work, add request.getContextPath() at the beginning of your url string, like so:

response.sendRedirect(request.getContextPath() + "/location/set.html?action=asklocation&redirectUrl="+request.getRequestUri()+request.getQueryString());

The Javadoc states:

If the location is relative without a leading '/' the container interprets it as relative to the current request URI. If the location is relative with a leading '/' the container interprets it as relative to the servlet container root.

Upvotes: 1

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