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Editorial Team
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Asked: 2026-05-26T02:16:21+00:00

I want to call a JSP with GET parameters within the GET parameter of

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I want to call a JSP with GET parameters within the GET parameter of a parent JSP. The URL for this would be http://server/getMap.jsp?lat=30&lon=-90&name=http://server/getName.jsp?lat1=30&lon1=-90

getName.jsp will return a string that goes in the name parameter of getMap.jsp.

I think the problem here is that &lon1=-90 at the end of the URL will be given to getMap.jsp instead of getName.jsp. Is there a way to distinguish which GET parameter goes to which URL?

One idea I had was to encode the second URL (e.g. = -> %3D and & -> %26) but that didn’t work out well. My best idea so far is to allow only one parameter in the second URL, comma-delimited. So I’ll have http://server/getMap.jsp?lat=30&lon=-90&name=http://server/getName.jsp?params=30,-90 and leave it up to getName.jsp to parse its variables. This way I leave the & alone.

NOTE – I know I can approach this problem from a completely different angle and avoid nested URLs altogether, but I still wonder (for the sake of knowledge!) if this is possible or if anyone has done it…

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1 Answer

  1. Editorial Team

    This has been done a lot, especially with ad serving technologies and URL redirects

    But an encoded URL should just work fine. You need to completely encode it tho. A generator can be found here

    So this:
    http://server/getMap.jsp?lat=30&lon=-90&name=http://server/getName.jsp?lat1=30&lon1=-90

    becomes this: http://server/getMap.jsp?lat=30&lon=-90&name=http%3A%2F%2Fserver%2FgetName.jsp%3Flat1%3D30%26lon1%3D-90

    I am sure that jsp has a function for this. Look for “urlencode”. Your JSP will see the contents of the GET-Variable “name” as the unencoded string: “http://server/getName.jsp?lat1=30&lon1=-90”

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